Description
Airbus A318/A319/A320/A321 Fire Protection Maintenance Manual – Chapter 26
The Airbus A318/A319/A320/A321 Fire Protection Maintenance Manual provides comprehensive, step-by-step instructions for the troubleshooting, testing, removal, and installation of all fire and smoke detection and fire extinguishing systems across the A320 family. This official Airbus Aircraft Maintenance Manual (AMM) chapter is an essential resource for airline maintenance engineers, mechanics, and technicians working on the A318, A319, A320, and A321. It covers the full scope of active fire protection, from engine and APU fire detection to cargo and lavatory smoke detection systems.
File Details
- Manual Type: Airbus Aircraft Maintenance Manual (AMM) – Chapter 26
- Brand: Airbus
- Models: A318, A319, A320, A321
- Language: English
- Page Count: 626
- File Format: PDF
- Document Number: AES
- Revision: 40
- Publication Date: May 01, 2012
Chapters Covered
The manual is organized into clear sections that mirror the AMM structure. It provides the exact procedures and specifications used in official Airbus maintenance programs.
Complete PDF Bookmark Tree
Complete Bookmarks
The complete bookmarks in the “Airbus A318/A319/A320/A321 Fire Protection Maintenance Manual – PDF Download” are as follows:
Manual Front Matter
Chapter 05 – TIME LIMITS – MAINTENANCE CHECKS
Chapter 06 – DIMENSIONS AND AREAS
Chapter 07 – LIFTING AND SHORING
Chapter 08 – LEVELING AND WEIGHING
Chapter 09 – TOWING AND TAXIING
Chapter 10 – PARKING, MOORING, STORAGE & RETURN TO SERVICE
Chapter 11 – PLACARDS AND MARKINGS
Chapter 12 – SERVICING
Chapter 20 – STANDARD PRACTICES – AIRFRAME
Chapter 21 – AIR CONDITIONING
Chapter 22 – AUTO FLIGHT
Chapter 23 – COMMUNICATIONS
Chapter 24 – ELECTRICAL POWER
Chapter 25 – EQUIPMENT/FURNISHINGS
+Chapter 26 – FIRE PROTECTIONp. 1
Table of Contentsp. 1
+26-00 – FIRE PROTECTION – GENERALp. 11
+26-00-00 – FIRE PROTECTION – GENERALp. 11
+26-00-00 PB 001 CONF 00 – FIRE PROTECTION – GENERAL – DESCRIPTION AND OPERATIONp. 11
Generalp. 11
Component Locationp. 12
System Descriptionp. 13
Power Supplyp. 14
Operation/Control and Indicatingp. 16
BITE Testp. 19
Figure 26-00-00-12900-D – Fire Detection and Extinguishing Systemsp. 21
Figure 26-00-00-12900-H – Fire Detection and Extinguishing Systemsp. 22
Figure 26-00-00-13000-A – Lavatory Smoke Detection and Extinguishing System/Portable Fire Extinguisherp. 23
Figure 26-00-00-16100-A – Engine Fire Detection and Extinguishing System – Electrical Power Supplyp. 24
Figure 26-00-00-16500-A – APU Fire Detection and Extinguishing System – Electrical Power Supplyp. 25
Figure 26-00-00-16900-B – Smoke Detection System in Avionics Compartment – Electrical Power Supplyp. 26
Figure 26-00-00-17300-B – Cargo Compartment, Lavatory Fire Detection System – Electrical Power Supplyp. 27
Figure 26-00-00-17700-A – Fire Extinguishing System in Cargo Compartment – Electrical Power Supplyp. 28
Figure 26-00-00-18800-B – Engine Fire Indicating and Controlsp. 29
Figure 26-00-00-18900-B – APU Fire Indicating and Controls in the Cockpitp. 30
Figure 26-00-00-19000-A – APU Fire Indicating and Controls from the Groundp. 31
Figure 26-00-00-19100-A – Smoke Indicating of the Avionics Compartmentp. 32
Figure 26-00-00-19200-D – Smoke Indicating and Controls of the Cargo Compartmentp. 33
Figure 26-00-00-19200-F – Smoke Indicating and Controls of the Cargo Compartmentp. 34
Figure 26-00-00-19300-A – ECAM Warning System – Indicating and Controlsp. 35
Figure 26-00-00-19400-A – CFDS Indicating and Controlsp. 36
+26-10 – DETECTIONp. 37
+26-10-00 – DETECTIONp. 37
+26-10-00 PB 001 CONF 00 – DETECTION – DESCRIPTION AND OPERATIONp. 37
Generalp. 37
System Descriptionp. 38
+26-12 – ENGINE FIRE AND OVERHEAT DETECTIONp. 40
+26-12-00 – ENGINE FIRE AND OVERHEAT DETECTIONp. 40
+26-12-00 PB 001 CONF 00 – ENGINE FIRE AND OVERHEAT DETECTION – DESCRIPTION AND OPERATIONp. 40
Generalp. 40
Component Locationp. 41
System Descriptionp. 42
Power Supplyp. 43
Interfacep. 44
Component Descriptionp. 45
Operation/Control and Indicatingp. 48
BITE Testp. 51
Figure 26-12-00-12300-B – ENG/APU FIRE Panel (20VU) and Fire Detection Unit (FDU) – Component Locationp. 56
Figure 26-12-00-12400-C – Pylon Fire Detectors – Component Locationp. 57
Figure 26-12-00-12900-A – Nacelle Fire Detectors – Component Locationp. 58
Figure 26-12-00-14100-B – Simplified FIRE Warning – Schematicp. 59
Figure 26-12-00-17800-B – ENG/APU FIRE Panel (1WD)p. 60
Figure 26-12-00-18800-A – Fire Detector – Schematicp. 61
Figure 26-12-00-19000-A – Fire Detector – ALARM and FAULT Statesp. 62
Figure 26-12-00-19700-A – Fire Detection Unit (FDU)p. 63
Figure 26-12-00-21200-A – Fire Detection Unit (FDU) – Logic Diagramp. 64
Figure 26-12-00-21500-B – FIRE Warning Circuit – Schematicp. 65
Figure 26-12-00-21600-A – FAULT Circuit – Schematicp. 66
+26-12-00 PB 501 CONF 00 – ENGINE FIRE AND OVERHEAT DETECTION – ADJUSTMENT/TESTp. 67
26-12-00-710-001-A – Operational Check of Loop/Squibp. 67
26-12-00-710-002-A – Operational Test of the Engine Fire and Overheat Detection with the Centralized Fault Display System (CFDS)p. 70
+26-12-00 PB 601 CONF 13 – ENGINE FIRE AND OVERHEAT DETECTION – INSPECTION/CHECKp. 72
+26-12-00-200-002-A – Visual Inspection of the Engine Fire Detection Systemp. 72
Figure 26-12-00-991-15000-A – Pylon Fire Detectorsp. 76
Figure 26-12-00-991-15100-A – Fan Fire Detectorsp. 77
Figure 26-12-00-991-15200-A – Core Fire Detectorsp. 78
+26-12-12 – ENGINE AND APU FIRE PANELp. 79
+26-12-12 PB 401 CONF 00 – ENGINE AND APU FIRE PANEL – REMOVAL/INSTALLATIONp. 79
+26-12-12-000-001-A – Removal of the ENG/APU Fire Panelp. 79
Figure 26-12-12-991-00500-A – Illustration of ENG/APU Fire Panelp. 82
26-12-12-400-001-A – Installation of the ENG/APU Fire Panelp. 83
+26-12-12-000-004-A – Removal of the FIRE Pushbutton Switch (ENG/APU Fire Panel)p. 88
Figure 26-12-12-991-00600-A – Illustration of FIRE Pushbutton Switch – Installationp. 91
Figure 26-12-12-991-00700-A – Illustration of FIRE Pushbutton Switch – Using of the extractorp. 92
26-12-12-400-004-A – Installation of the FIRE Pushbutton Switch (ENG/APU Fire Panel)p. 93
+26-12-15 – DETECTOR – FIRE, FAN (LOOP A AND B)p. 97
+26-12-15 PB 401 CONF 13 – DETECTOR – FIRE, FAN (LOOP A AND B) – REMOVAL/INSTALLATIONp. 97
+26-12-15-000-010-B – Removal of the Accessory-Zone Fire-Detectorp. 97
Figure 26-12-15-991-15000-B – Accessory-Zone Fire-Detectorp. 100
26-12-15-400-010-B – Installation of the Accessory-Zone Fire-Detectorp. 104
+26-12-16 – DETECTOR – FIRE, PYLON (LOOP A AND B)p. 107
+26-12-16 PB 401 CONF 00 – DETECTOR – FIRE, PYLON (LOOP A AND B) – REMOVAL/INSTALLATIONp. 107
+26-12-16-000-001-A – Removal of the Pylon Fire Detectorsp. 107
Figure 26-12-16-991-00100-C – Pylon Fire Detectors – Locationp. 110
Figure 26-12-16-991-00200-C – Pylon Fire Detectors – Installationp. 111
26-12-16-400-001-A – Installation of the Pylon Fire Detectors with the Tool (98D26203003000)p. 112
+26-12-16-400-001-A-01 – Installation of the Pylon Fire Detectors without the Tool (98D26203003000)p. 116
Figure 26-12-16-991-00400-C – Pylon Fire Detectors – Locationp. 120
Figure 26-12-16-991-00500-D – Pylon Fire Detectors – Installationp. 121
+26-12-16-000-002-A – Removal of the Support with the Pylon Fire Detectorsp. 122
Figure 26-12-16-991-00300-B – Pylon Fire Detectors – Supportp. 125
26-12-16-400-002-A – Installation of the Support with the Pylon Fire Detectorsp. 126
+26-12-17 – DETECTOR – FIRE, CORE (LOOP A AND B)p. 130
+26-12-17 PB 401 CONF 13 – DETECTOR – FIRE, CORE (LOOP A AND B) – REMOVAL/INSTALLATIONp. 130
+26-12-17-000-010-A – Removal of the Core Fire Detectorsp. 130
Figure 26-12-17-991-15000-A – Core Fire Detectorsp. 135
26-12-17-400-010-A – Installation of the Core Fire Detectorsp. 139
+26-12-34 – FIRE DETECTION UNIT (FDU) – ENGINEp. 145
+26-12-34 PB 401 CONF 00 – FIRE DETECTION UNIT (FDU) – ENGINE – REMOVAL/INSTALLATIONp. 145
+26-12-34-000-001-A – Removal of the Engine Fire-Detection Unit (FDU)p. 145
Figure 26-12-34-991-00100-B – Engine Fire-Detection Unit (FDU)p. 147
26-12-34-400-001-A – Installation of the Engine Fire-Detection Unit (FDU)p. 148
+26-13 – APU FIRE AND OVERHEAT DETECTIONp. 150
+26-13-00 – APU FIRE AND OVERHEAT DETECTIONp. 150
+26-13-00 PB 001 CONF 00 – APU FIRE AND OVERHEAT DETECTION – DESCRIPTION AND OPERATIONp. 150
Generalp. 150
Component Locationp. 151
System Descriptionp. 152
Interfacep. 153
Operationp. 154
Testp. 157
Figure 26-13-00-11200-A – Fire Detection – Functional Schematicp. 158
Figure 26-13-00-12500-A – APU Fire and Overheat Detection – Comp. Locationp. 159
Figure 26-13-00-14100-A – APU Fire and Overheat Detection – Principle Diagramp. 161
Figure 26-13-00-14200-A – Pneumatic Sensor Elementp. 164
Figure 26-13-00-16800-A – Logic – Detector FAULT Warning.p. 165
Figure 26-13-00-17200-A – FDU – Detection Logicp. 166
+26-13-00 PB 501 CONF 00 – APU FIRE AND OVERHEAT DETECTION – ADJUSTMENT/TESTp. 167
26-13-00-710-001-A – Operational Test of the APU Fire and Overheat Detection Systemp. 167
26-13-00-710-002-A – BITE Test of the APU Fire and Overheat Detection Systemp. 170
+26-13-15 – DETECTOR – APU FIRE (LOOP A AND B)p. 172
+26-13-15 PB 401 CONF 00 – DETECTOR – APU FIRE (LOOP A AND B) – REMOVAL/INSTALLATIONp. 172
+26-13-15-000-001-A – Removal of the Sensing Elementsp. 172
Figure 26-13-15-991-00100-A – Sensing Elements of the APU Fire Detectorp. 174
Figure 26-13-15-991-00200-A – Sensing Elements – Installationp. 175
26-13-15-400-001-A – Installation of the Sensing Elementsp. 176
+26-13-34 – FIRE DETECTION UNIT (FDU) – APUp. 180
+26-13-34 PB 401 CONF 00 – FIRE DETECTION UNIT (FDU) – APU – REMOVAL/INSTALLATIONp. 180
+26-13-34-000-001-A – Removal of the APU Fire-Detection Unit (FDU)p. 180
Figure 26-13-34-991-00100-B – APU Fire-Detection Unitp. 182
26-13-34-400-001-A – Installation of the APU Fire-Detection Unit (FDU)p. 183
+26-15 – AVIONICS COMPARTMENT SMOKE DETECTIONp. 186
+26-15-00 – AVIONICS COMPARTMENT SMOKE DETECTIONp. 186
+26-15-00 PB 001 CONF 00 – AVIONICS COMPARTMENT SMOKE DETECTION – DESCRIPTION AND OPERATIONp. 186
Generalp. 186
Component Locationp. 187
System Descriptionp. 188
Power Supplyp. 189
Interfacep. 190
Component Descriptionp. 191
Operation/Control and Indicatingp. 193
BITE Testp. 197
Figure 26-15-00-13100-A – Smoke Detector – Locationp. 198
Figure 26-15-00-13200-A – Avionics-Compartment Ventilation System – Smoke Detector Locationp. 199
Figure 26-15-00-14400-A – VENTILATION Panel 22VU and EMER ELEC PWR Panel 21VUp. 200
Figure 26-15-00-15900-A – Avionics-Compartment Smoke-Detection System – Power supplyp. 201
Figure 26-15-00-15900-B – Avionics-Compartment Smoke-Detection System – Power supplyp. 202
Figure 26-15-00-17100-A – Avionics-Compartment Smoke-Detection System – Interfacep. 203
Figure 26-15-00-19000-A – Smoke Detector – Descriptionp. 204
Figure 26-15-00-19000-B – Smoke Detector – Descriptionp. 205
Figure 26-15-00-21900-A – Avionics-Compartment Smoke-Detection System – Indicating and Testp. 206
Figure 26-15-00-21900-B – Avionics-Compartment Smoke-Detection System – Indicating and Testp. 207
Figure 26-15-00-22000-A – Avionics-Compartment Smoke-Extraction System – Schematicp. 208
Figure 26-15-00-22100-A – Smoke Detector – Schematicp. 209
Figure 26-15-00-22100-B – Smoke Detector – Schematicp. 210
Figure 26-15-00-22200-A – Smoke Detector-Operationp. 211
+26-15-00 PB 501 CONF 00 – AVIONICS COMPARTMENT SMOKE DETECTION – ADJUSTMENT/TESTp. 212
26-15-00-710-001-A – Operational Test of the Avionics Smoke Detectionp. 212
26-15-00-720-001-A – Functional Test of Ionic Smoke Detector Sensitivityp. 216
+26-15-00 PB 601 CONF 00 – AVIONICS COMPARTMENT SMOKE DETECTION – INSPECTION/CHECKp. 219
+26-15-00-100-001-A – Cleaning of the Avionics-Compartment Smoke-Detector Piccolo-Tubesp. 219
Figure 26-15-00-991-00100-A – Avionics-Compartment Smoke-Detector Piccolo-Tubesp. 221
26-15-00-100-002-A – Removal of Ionic Smoke Detector For Work Shop Cleaningp. 222
+26-15-15 – DETECTOR – SMOKEp. 224
+26-15-15 PB 401 CONF 00 – DETECTOR – SMOKE – REMOVAL/INSTALLATIONp. 224
+26-15-15-000-001-A – Removal of the Smoke Detector – Avionics Compartmentp. 224
Figure 26-15-15-991-00100-A – Smoke Detectorp. 226
26-15-15-400-001-A – Installation of the Smoke Detector – Avionics Compartmentp. 227
+26-16 – CARGO COMPARTMENT SMOKE DETECTIONp. 229
+26-16-00 – CARGO COMPARTMENT SMOKE DETECTIONp. 229
+26-16-00 PB 001 CONF 00 – CARGO COMPARTMENT SMOKE DETECTION – DESCRIPTION AND OPERATIONp. 229
Generalp. 229
Component Locationp. 230
System Descriptionp. 232
Operation/Control and Indicatingp. 234
Testp. 235
Figure 26-16-00-11200-A – Smoke Detectorp. 237
Figure 26-16-00-11200-B – Smoke Detectorp. 238
Figure 26-16-00-11300-A – Cargo Compartment Smoke-Detectionp. 239
Figure 26-16-00-12600-B – Cargo Compartment Smoke-Detection – Component Location (Sheet1)p. 240
Figure 26-16-00-12600-C – Cargo Compartment Smoke-Detection – Component Location (Sheet1)p. 241
Figure 26-16-00-12700-B – Cargo-Compartment Fire-Extinguishing – Component Location (Sheet2)p. 242
Figure 26-16-00-12700-D – Cargo-Compartment Fire-Extinguishing – Component Location (Sheet2)p. 243
Figure 26-16-00-16700-B – Cargo Compartment Smoke-Detection – Schematicp. 244
Figure 26-16-00-16700-C – Cargo Compartment Smoke-Detection – Schematicp. 245
Figure 26-16-00-16800-B – Schematicp. 246
Figure 26-16-00-16800-I – Schematicp. 247
+26-16-00 PB 501 CONF 00 – CARGO COMPARTMENT SMOKE DETECTION – ADJUSTMENT/TESTp. 248
26-16-00-710-001-A – Operational Check of Cargo-Compartment Smoke-Detection by PTTp. 248
26-16-00-710-003-A – Operational Check of Cargo-Compartment Smoke-Detection by CFDS to Confirm Isolation Valve Latching Circuit Integrityp. 253
+26-16-00-720-001-A – Functional Test of the Cargo-Compartment Smoke-Detector Sensitivityp. 258
Figure 26-16-00-991-00100-A – Smoke-Detector Test-Plug Assemblyp. 263
Figure 26-16-00-991-00200-A – Test Plug Assembly for Photo-Electric-Type Smoke Detectorp. 264
Figure 26-16-00-991-00300-A – Cargo-Compartment Smoke Detector – Visual Identificationp. 265
+26-16-15 – DETECTOR – SMOKEp. 266
+26-16-15 PB 401 CONF 00 – DETECTOR – SMOKE – REMOVAL/INSTALLATIONp. 266
+26-16-15-000-001-A – Removal of the Cargo Smoke Detectorsp. 266
Figure 26-16-15-991-00100-C – Smoke Detectorsp. 268
Figure 26-16-15-991-00100-B – Smoke Detectorsp. 269
26-16-15-400-001-A – Installation of the Cargo Smoke Detectorsp. 270
+26-16-15 PB 701 CONF 00 – DETECTOR – SMOKE – CLEANING/PAINTINGp. 273
26-16-15-100-001-A – Remove the Cargo-Compartment Smoke-Detectors for Cleaningp. 273
+26-17 – LAVATORY SMOKE DETECTIONp. 276
+26-17-00 – LAVATORY SMOKE DETECTIONp. 276
+26-17-00 PB 001 CONF 00 – LAVATORY SMOKE DETECTION – DESCRIPTION AND OPERATIONp. 276
Generalp. 276
Component Locationp. 277
Descriptionp. 278
Operationp. 280
SDCU Powep. 281
Figure 26-17-00-11200-A – Lavatory Smoke Detectionp. 282
Figure 26-17-00-12500-B – Lavatory Smoke Detection – Component Locationp. 283
Figure 26-17-00-13900-A – Smoke Detectorp. 284
Figure 26-17-00-13900-C – Smoke Detectorp. 285
Figure 26-17-00-14600-A – Smoke Detection-System Interfacesp. 286
Figure 26-17-00-19600-C – Lavatory Smoke Detection – Schematicp. 287
Figure 26-17-00-19600-K – Lavatory Smoke Detection – Schematicp. 288
+26-17-00 PB 401 CONF 00 – LAVATORY SMOKE DETECTION – DEACTIVATION/REACTIVATIONp. 289
26-17-00-040-801-A – Deactivation of the Lavatory Smoke-Detection Systemp. 289
26-17-00-040-802-A – Deactivation of the Smoke-Detection Control Unit (SDCU)p. 290
26-17-00-440-801-A – Reactivation of the Lavatory Smoke-Detection Systemp. 291
26-17-00-440-802-A – Reactivation of the Smoke-Detection Control Unit (SDCU)p. 292
+26-17-00 PB 501 CONF 00 – LAVATORY SMOKE DETECTION – ADJUSTMENT/TESTp. 293
26-17-00-710-001-A – Operational Test of the Lavatory Smoke-Detection Systemp. 293
+26-17-00-720-001-A – Functional Test of the Lavatory Smoke-Detector Sensitivityp. 297
Figure 26-17-00-991-00100-A – Smoke-Detector Test Plug Assemblyp. 300
Figure 26-17-00-991-00700-A – Test Plug Assembly for Photo-Electric-Type Smoke Detectorp. 301
Figure 26-17-00-991-00800-A – Lavatory Smoke Detector – Visual Identificationp. 302
26-17-00-710-002-A – Check of the Wiring of the Smoke Detector Loop via MCDUp. 303
+26-17-15 – DETECTOR – SMOKEp. 304
+26-17-15 PB 401 CONF 00 – DETECTOR – SMOKE – REMOVAL/INSTALLATIONp. 304
+26-17-15-000-001-A – Removal of the Lavatory Smoke Detectorp. 304
Figure 26-17-15-991-00100-G – Smoke Detectorp. 306
26-17-15-400-001-A – Installation of the Lavatory Smoke Detectorp. 307
+26-17-15-000-008-A – Removal of the Lavatory Smoke Detectorp. 309
Figure 26-17-15-991-01700-A – Smoke Detectorp. 311
26-17-15-400-007-A – Installation of the Lavatory Smoke Detectorp. 312
+26-17-15 PB 701 CONF 00 – DETECTOR – SMOKE – CLEANING/PAINTINGp. 314
26-17-15-100-003-A – Remove the Smoke Detector for Cleaningp. 314
+26-17-34 – CONTROL UNIT – SMOKE DETECTION (SDCU)p. 317
+26-17-34 PB 401 CONF 00 – CONTROL UNIT – SMOKE DETECTION (SDCU) – REMOVAL/INSTALLATIONp. 317
+26-17-34-000-001-A – Removal of the Smoke-Detection Control Unit (SDCU)p. 317
Figure 26-17-34-991-00100-A – Smoke-Detection Control Unitp. 319
26-17-34-400-001-A – Installation of the Smoke-Detection Control Unit (SDCU)p. 320
+26-20 – EXTINGUISHINGp. 322
+26-20-00 – EXTINGUISHINGp. 322
+26-20-00 PB 001 CONF 00 – EXTINGUISHING – DESCRIPTION AND OPERATIONp. 322
Generalp. 322
System Descriptionp. 323
+26-21 – ENGINE FIRE EXTINGUISHINGp. 324
+26-21-00 – ENGINE FIRE EXTINGUISHINGp. 324
+26-21-00 PB 001 CONF 00 – ENGINE FIRE EXTINGUISHING – DESCRIPTION AND OPERATIONp. 324
Generalp. 324
Component Locationp. 325
System Descriptionp. 326
Power Supplyp. 327
Interfacep. 328
Component Descriptionp. 329
Operation/Control and Indicatingp. 333
BITE Testp. 335
Figure 26-21-00-12400-B – Fire Extinguisher Bottle – Component Locationp. 337
Figure 26-21-00-16100-B – ENG 1(2) FIRE Pushbutton Switch – Interfacep. 338
Figure 26-21-00-17300-B – Engine 1(2) Fire Extinguishing Circuit – Schematicp. 339
Figure 26-21-00-17400-A – Fire Extinguisher Bottlep. 340
Figure 26-21-00-17500-D – Fire Extinguishing System – Distributionp. 341
Figure 26-21-00-17600-B – ENG/APU FIRE Panel (20VU)p. 342
Figure 26-21-00-22800-B – Pressure Switch of the Fire Extinguisher Bottlep. 343
+26-21-00 PB 401 CONF 00 – ENGINE FIRE EXTINGUISHING – DEACTIVATION/REACTIVATIONp. 344
+26-21-00-040-001-A – Bottle Pressure Checkp. 344
Figure 26-21-00-991-00600-A – Engine Fire Extinguishing – Locationp. 350
26-21-00-040-002-A – ENG FIRE TEST – Circuit Verificationp. 351
26-21-00-040-003-A – Test of the SQUIB Legend of the AGENT Pushbutton switchp. 352
+26-21-00 PB 501 CONF 00 – ENGINE FIRE EXTINGUISHING – ADJUSTMENT/TESTp. 358
+26-21-00-710-002-A – Operational Check of Bottle Low-Pressure Indicating-Circuitp. 358
Figure 26-21-00-991-00200-B – Test of the Engine Fire-Extinguisher Botlle Low Pressurep. 361
Figure 26-21-00-991-00500-A – Engine Fire-Extinguisher Bottle – Locationp. 362
26-21-00-710-004-A – Operational Test of Fire Control Pushbutton Switch Sub-functions Related to Engine Shut-Down and Isolation (With External Air-supply Unit)p. 363
26-21-00-710-004-A-01 – Operational Test of Fire Control Pushbutton Switch Sub-funtions Related to Engine Shut Down and Isolation (With APU)p. 370
26-21-00-720-001-A – Check of Firing Circuit Continuityp. 377
+26-21-00-720-003-C – Check Distribution Piping for Leakage and Obstructionp. 382
Figure 26-21-00-991-00400-B – Distribution Linep. 387
Figure 26-21-00-991-00700-A – Vibration Harnessp. 389
+26-21-00-720-003-C-01 – Check Distribution Piping for Leakage and Obstructionp. 390
Figure 26-21-00-991-00900-A – Distribution Linep. 395
26-21-00-720-005-A – Functional Test of the ENG 1(2) FIRE Pushbutton Switchp. 397
+26-21-41 – BOTTLE – FIRE EXTINGUISHERp. 403
+26-21-41 PB 401 CONF 00 – BOTTLE – FIRE EXTINGUISHER – REMOVAL/INSTALLATIONp. 403
26-21-41-920-001-A – Discard Cartridgep. 403
+26-21-41-000-001-A – Removal of the Engine Fire-Extinguisher Bottlep. 404
Figure 26-21-41-991-00200-C – Engine Fire-Extinguisher Bottlep. 408
Figure 26-21-41-991-00100-A – Engine Fire-Extinguisher Bottle – Locationp. 409
Figure 26-21-41-991-00200-D – Engine Fire-Extinguisher Bottlep. 410
26-21-41-400-001-A – Installation of the Engine Fire-Extinguisher Bottlep. 411
+26-21-41-000-004-A – Removal of the Cartridge of the Engine Fire-Extinguisher Bottlep. 417
Figure 26-21-41-991-00600-C – Cartridge – engine fire-extinguisher bottlep. 419
Figure 26-21-41-991-00600-B – Cartridge – engine fire-extinguisher bottlep. 420
26-21-41-400-004-A – Installation of the Cartridge of the Engine Fire-Extinguisher Bottlep. 421
+26-21-41-000-002-A – Removal of the Discharge Head of the Engine Fire-Extinguisher Bottlep. 424
Figure 26-21-41-991-00700-C – Discharge Head – Engine Fire-Extinguisher Bottlep. 426
Figure 26-21-41-991-00700-B – Discharge Head – Engine Fire-Extinguisher Bottlep. 427
+26-21-41-400-002-A – Installation of the Discharge Head of the Engine Fire-Extinguisher Bottlep. 428
Figure 26-21-41-991-00800-A – Discharge Head – Orientationp. 431
+26-21-41 PB 601 CONF 00 – BOTTLE – FIRE EXTINGUISHER – INSPECTION/CHECKp. 432
26-21-41-280-001-A – Weight Check of the Engine Fire-Extinguisher Bottlep. 432
26-21-41-280-002-A – Hydrostatic Test of Bottles Including Check Setting of Pressure Switchp. 434
+26-21-49 – PIPE – ENGINE FIRE EXTINGUISHINGp. 436
+26-21-49 PB 401 CONF 13 – PIPE – ENGINE FIRE EXTINGUISHING – REMOVAL/INSTALLATIONp. 436
+26-21-49-000-001-A – Removal of the Engine Fire-Extinguishing Pipep. 436
Figure 26-21-49-991-00100-C – Engine Fire-Extinguishing Pipep. 440
26-21-49-400-001-A – Installation of the Engine Fire-Extinguishing Pipep. 442
+26-22 – APU FIRE EXTINGUISHINGp. 448
+26-22-00 – APU FIRE EXTINGUISHINGp. 448
+26-22-00 PB 001 CONF 00 – APU FIRE EXTINGUISHING – DESCRIPTION AND OPERATIONp. 448
Generalp. 448
Component Locationp. 449
System Descriptionp. 450
Power Supplyp. 451
Interfacep. 452
Component Descriptionp. 453
Operation/Control and Indicatingp. 454
BITE Testp. 457
Figure 26-22-00-12300-A – APU Fire Extinguishing – Component Locationp. 458
Figure 26-22-00-13800-A – Fire Extinguishing – Flight Condition – Schematicp. 460
Figure 26-22-00-13900-A – Automatic Extinguishing on Ground – Schematicp. 461
+26-22-00 PB 401 CONF 00 – APU FIRE EXTINGUISHING – DEACTIVATION/REACTIVATIONp. 463
26-22-00-040-004-A – Bottle Pressure Checkp. 463
26-22-00-040-004-A-01 – Bottle Weight Checkp. 466
26-22-00-040-005-A – Circuit Verificationp. 467
+26-22-00-040-007-A – Bottle Pressure Switch Checkp. 471
Figure 26-22-00-991-00200-A – Check of the Pressure Switchp. 474
26-22-00-040-008-A – Check of the remaining Squib Integrityp. 475
26-22-00-040-010-A – To make sure that the APU Automatic Fire Extinguishing System is operative when the APU FIRE Light on External Power Panel is inoperativep. 479
26-22-00-040-011-A – To make sure that the APU Automatic Fire Extinguishing System is operative when the APU SHUT OFF PB on External Power Panel is inoperativep. 480
26-22-00-040-012-A – Test Circuit Verificationp. 481
+26-22-00 PB 501 CONF 00 – APU FIRE EXTINGUISHING – ADJUSTMENT/TESTp. 485
26-22-00-710-001-A – Operational Test of the APU Fire-Extinguishing Loop/Squibp. 485
26-22-00-710-002-A – Operational Test of APU Auto-Fire-Exting. Circuit and the APU LP Fuel-Valve operation using each indiv. motor in turn and Test APU Emerg. Shutdown Circuitp. 488
26-22-00-720-001-A – Continuity Check of the APU Fire-Extinguishing Firing-Circuitp. 504
26-22-00-710-003-A – Operational Test of the Low-Pressure Indicating Circuit of the APU Fire-Extinguishing Bottlep. 507
26-22-00-710-004-A – Operational Test of APU Fire-Exting. P/BSW funct. (single chan. config) and APU LP Fuel-Valve using each indiv. motor in turn and APU Emerg. Shutdown Circuitp. 510
+26-22-00 PB 601 CONF 00 – APU FIRE EXTINGUISHING – INSPECTION/CHECKp. 525
26-22-00-210-001-A – Inspection of the APU Fire-Extinguishing Distribution Pipingp. 525
+26-22-00-200-001-A – Inspection/Check of the APU Fire Extinguishing Systemp. 527
Figure 26-22-00-991-00100-A – APU Fire Extinguishing Systemp. 530
+26-22-41 – BOTTLE – FIRE EXTINGUISHERp. 531
+26-22-41 PB 401 CONF 00 – BOTTLE – FIRE EXTINGUISHER – REMOVAL/INSTALLATIONp. 531
+26-22-41-000-001-A – Removal of the Fire Extinguisher Bottlep. 531
Figure 26-22-41-991-00100-A – Fire – Extinguisher Bottlep. 534
26-22-41-400-001-A – Installation of the Fire Extinguisher Bottlep. 535
+26-22-41 PB 601 CONF 00 – BOTTLE – FIRE EXTINGUISHER – INSPECTION/CHECKp. 540
26-22-41-280-002-A – Remove and do a Hydrostatic Test Including Check of the Pressure Switch Setting of the APU Fire Extinguisher Bottlep. 540
+26-22-42 – CARTRIDGE – FIRE EXTINGUISHER BOTTLEp. 541
+26-22-42 PB 401 CONF 00 – CARTRIDGE – FIRE EXTINGUISHER BOTTLE – REMOVAL/INSTALLATIONp. 541
+26-22-42-000-001-A – Removal of the Fire-Extinguisher Bottle Cartridgep. 541
Figure 26-22-42-991-00100-A – Fire – Extinguisher Bottle Cartridgep. 543
26-22-42-400-001-A – Installation of the Fire-Extinguisher Bottle Cartridgep. 544
26-22-42-920-001-A – Remove and discard APU Fire Extinguisher Bottle Cartridgep. 547
+26-22-43 – INDICATOR ASSEMBLY – DISCHARGEp. 549
+26-22-43 PB 201 CONF 00 – INDICATOR ASSEMBLY – DISCHARGE – MAINTENANCE PRACTICESp. 549
+26-22-43-960-001-A – Replacement of the Discharge Indicator Discp. 549
Figure 26-22-43-991-00100-A – Discharge Indicatorp. 551
+26-23 – CARGO COMPARTMENT FIRE EXTINGUISHINGp. 552
+26-23-00 – CARGO COMPARTMENT FIRE EXTINGUISHINGp. 552
+26-23-00 PB 001 CONF 00 – CARGO COMPARTMENT FIRE EXTINGUISHING – DESCRIPTION AND OPERATIONp. 552
Generalp. 552
Component Locationp. 553
Descriptionp. 554
Operation/Control and Indicatingp. 555
Testp. 556
Figure 26-23-00-12400-A – Cargo-Compartment Fire-Extinguishing – Component Locationp. 557
Figure 26-23-00-12500-A – Cargo-Compartment Fire-Extinguishing – Component Locationp. 559
Figure 26-23-00-13900-A – Fire Extinguishing Bottlep. 560
Figure 26-23-00-14300-E – Functional Diagramp. 561
Figure 26-23-00-16100-A – Cargo-Compartment Fire-Extinguishing – Schematicp. 562
+26-23-00 PB 201 CONF 00 – CARGO COMPARTMENT FIRE EXTINGUISHING – MAINTENANCE PRACTICESp. 563
26-23-00-200-005-A – Restoration of the Fire Extinguishing System (FES) after Activationp. 563
+26-23-00 PB 401 CONF 00 – CARGO COMPARTMENT FIRE EXTINGUISHING – DEACTIVATION/REACTIVATIONp. 567
26-23-00-040-001-A – Cargo Compartment DISCH LT – Verification of Fire-Extinguisher Bottle Weightp. 567
+26-23-00 PB 501 CONF 00 – CARGO COMPARTMENT FIRE EXTINGUISHING – ADJUSTMENT/TESTp. 568
26-23-00-710-001-A – Operational Test of the Cargo-Compartment Fire-Extinguishing Systemp. 568
26-23-00-720-001-A – Check of Firing Circuit Continuityp. 569
+26-23-00 PB 601 CONF 00 – CARGO COMPARTMENT FIRE EXTINGUISHING – INSPECTION/CHECKp. 572
+26-23-00-200-001-A – Check Fire Extinguisher Lines for Leakage and Blockagesp. 572
Figure 26-23-00-991-00500-A – Check of Fire-Extinguishing Distribution-Pipes for Leaksp. 577
+26-23-41 – BOTTLE – FIRE EXTINGUISHERp. 578
+26-23-41 PB 401 CONF 00 – BOTTLE – FIRE EXTINGUISHER – REMOVAL/INSTALLATIONp. 578
26-23-41-920-001-A – Remove and Discard Cargo Compartment Fire-Extinguisher Bottle Cartridgesp. 578
+26-23-41-000-005-A – Removal of the Cartridge of the Cargo Fire-Extinguisher Bottlep. 579
Figure 26-23-41-991-00100-A – Cartridge – Cargo Fire-Extinguisher Bottlep. 581
26-23-41-400-005-A – Installation of the Cartridge of the Cargo Fire-Extinguisher Bottlep. 582
+26-23-41-000-004-A – Removal of the Cargo Fire-Extinguisher Bottlep. 585
Figure 26-23-41-991-00300-A – Cargo Fire-Extinguisher Bottlep. 587
26-23-41-400-004-A – Installation of the Cargo Fire-Extinguisher Bottlep. 588
26-23-41-000-003-A – Removal of the Discharge Head of the Cargo Fire-Extinguisher Bottlep. 592
26-23-41-400-003-A – Installation of the Discharge Head of the Cargo Fire-Extinguisher Bottlep. 593
+26-23-41 PB 601 CONF 00 – BOTTLE – FIRE EXTINGUISHER – INSPECTION/CHECKp. 594
26-23-41-280-001-A – Remove Cargo Compartment Fire Extinguisher Bottle for Weight Checkp. 594
26-23-41-280-002-A – Remove Cargo Compartment Fire Extinguisher Bottle for Hydrostatic Test and Check of Pressure Switch Settingp. 595
+26-24 – PORTABLE FIRE EXTINGUISHERp. 596
+26-24-00 – PORTABLE FIRE EXTINGUISHERp. 596
+26-24-00 PB 001 CONF 00 – PORTABLE FIRE EXTINGUISHER – DESCRIPTION AND OPERATIONp. 596
Generalp. 596
Component Locationp. 597
Descriptionp. 598
Component Descriptionp. 599
Operationp. 600
Figure 26-24-00-12300-BE – Portable Fire Extinguisher – Component Locationp. 601
Figure 26-24-00-15600-A – Portable Fire Extinguisher – Halon Agentp. 602
+26-24-00 PB 601 CONF 00 – PORTABLE FIRE EXTINGUISHER – INSPECTION/CHECKp. 603
26-24-00-210-001-A – Inspection/Check of the Portable Fire Extinguishersp. 603
26-24-00-210-002-A – Check Pressure Gauge Readingp. 605
26-24-00-280-001-A – Hydrostatic Test of Bottlesp. 607
26-24-00-210-003-A – Weight Check of the Portable Fire Extinguisherp. 609
26-24-00-280-002-A – Hydrostatic Test of Bottles and Weight Check of Propellant Cartridgep. 611
+26-25 – LAVATORY FIRE EXTINGUISHINGp. 613
+26-25-00 – LAVATORY FIRE EXTINGUISHINGp. 613
+26-25-00 PB 001 CONF 00 – LAVATORY FIRE EXTINGUISHING – DESCRIPTION AND OPERATIONp. 613
Generalp. 613
Component Locationp. 614
Descriptionp. 615
Operationp. 616
Figure 26-25-00-12500-C – Lavatory Fire Extinguishing – Component Locationp. 617
+26-25-00 PB 601 CONF 00 – LAVATORY FIRE EXTINGUISHING – INSPECTION/CHECKp. 618
+26-25-00-200-002-A – General Visual Inspection of Lavatory Fire Extinguisher for Signs of Leakage/Dischargep. 618
Figure 26-25-00-991-01100-C – Lavatory Fire Extinguisherp. 620
26-25-00-200-003-A – Weight Check of the Lavatory Fire-Extinguisher Bottlesp. 621
26-25-00-200-005-A – Visual Check of Fire Extinguisher Bottle Pressure Readingp. 622
+26-25-41 – BOTTLE – FIRE EXTINGUISHERp. 623
+26-25-41 PB 401 CONF 00 – BOTTLE – FIRE EXTINGUISHER – REMOVAL/INSTALLATIONp. 623
+26-25-41-000-001-A – Removal of the Fire Extinguisher Bottlep. 623
Figure 26-25-41-991-00100-C – Fire Extinguisher Bottlep. 624
26-25-41-400-001-A – Installation of the Fire Extinguisher Bottlep. 625
Chapter 27 – FLIGHT CONTROLS
Chapter 28 – FUEL
Chapter 29 – HYDRAULIC POWER
Chapter 30 – ICE AND RAIN PROTECTION
Chapter 31 – INDICATING/RECORDING SYSTEMS
Chapter 32 – LANDING GEAR
Chapter 33 – LIGHTS
Chapter 34 – NAVIGATION
Chapter 35 – OXYGEN
Chapter 36 – PNEUMATIC
Chapter 38 – WATER/WASTE
Chapter 46 – INFORMATION SYSTEMS
Chapter 49 – AIRBORNE AUXILIARY POWER
Chapter 51 – STANDARDS PRACTICES AND STRUCTURES
Chapter 52 – DOORS
Chapter 53 – FUSELAGE
Chapter 54 – NACELLES/PYLONS
Chapter 55 – STABILIZERS
Chapter 56 – WINDOWS
Chapter 57 – WINGS
Chapter 70 – (IAE) – STANDARD PRACTICES – ENGINE
Chapter 71 – (IAE) – POWER PLANT
Chapter 72 – (IAE) – ENGINE
Chapter 73 – (IAE) – ENGINE FUEL AND CONTROL
Chapter 74 – (IAE) – IGNITION
Chapter 75 – (IAE) – AIR
Chapter 76 – (IAE) – ENGINE CONTROLS
Chapter 77 – (IAE) – ENGINE INDICATING
Chapter 78 – (IAE) – EXHAUST
Chapter 79 – (IAE) – OIL
Chapter 80 – (IAE) – STARTING
- Fire Protection – General: Overview, component locations, system description, electrical power supply, operation/control and indicating, and BITE test.
- Detection: Description and operation of engine, APU, and overheat detection systems.
- Engine Fire and Overheat Detection: Component locations, schematics, alarm and fault states, FDU logic, operational and BITE tests.
- APU Fire and Overheat Detection: Component locations, system description, interface, operation, and test procedures.
- Smoke Detection – Avionics Compartment: System description, power supply, interface, component description, operation/control, BITE test, and adjustment/test procedures.
- Smoke Detection – Cargo Compartment: Component locations, system description, operation, test, adjustment/test, and removal/installation of detectors.
- Smoke Detection – Lavatory: Component locations, description, operation, SDCU power-up test, deactivation/reactivation, adjustment/test, and detector removal/installation.
- Extinguishing: Description and operation of all fixed extinguishing systems and portable fire extinguishers.
- Engine Fire Extinguishing: Component locations, system description, power supply, interface, component description, operation, BITE test, deactivation, adjustment/test, and bottle/pipe removal/installation.
- APU Fire Extinguishing: Component locations, system description, power supply, interface, component description, operation, BITE test, deactivation, adjustment/test, inspection, and bottle/cartridge/discharge indicator removal/installation.
- Cargo Compartment Fire Extinguishing: Component locations, description, operation, test, maintenance practices, deactivation, adjustment/test, inspection, and bottle/cartridge removal/installation.
- Portable Fire Extinguisher: Description, component location, and inspection/check procedures.
- Lavatory Fire Extinguishing: Description, component location, operation, and inspection/check procedures.
This chapter gives a technician everything needed to service the fire protection system, from understanding the electro-pneumatic fire detectors to performing continuity checks on squib circuits and conducting operational tests via the MCDU. It ensures that all maintenance is performed to the latest Airbus standards, reducing the risk of false warnings and ensuring system reliability.
Why Choose This PDF Manual
The Airbus A318/A319/A320/A321 Fire Protection Maintenance Manual is the definitive guide for maintaining the fire and smoke detection and extinguishing systems on these popular narrow-body aircraft. It enables you to confidently perform system operational checks, test loop and squib integrity, troubleshoot FDU and SDCU faults, and correctly remove and install components like fire detector loops, bottles, and cartridges.
Having the correct procedures and torque values at your fingertips is critical when working on safety-critical fire protection systems. This manual provides the authorized Airbus data to ensure that all work is carried out correctly and safely, helping to prevent in-service failures and costly delays.
This is a digital PDF download. After payment, you will receive instant access to the file. It is printable and can be viewed on any device – PC, Mac, tablet, or smartphone. No physical item will be shipped.
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