Airbus A330 PW Engine Indicating Chapter 77 Aircraft Maintenance Manual

Description

Airbus A330 PW Engine Indicating Chapter 77 Aircraft Maintenance Manual

This Airbus A330 (PW) Engine Indicating Chapter 77 Aircraft Maintenance Manual is the definitive technical reference for maintaining, troubleshooting, and repairing the engine indicating systems on Pratt & Whitney powered Airbus A330 aircraft. Whether you are performing routine removal and installation of speed probes, conducting EPR system leak tests, inspecting EGT thermocouple probes, or diagnosing vibration indicating faults, this AMM chapter provides the exact procedures, torque values, clearances, and safety warnings required to complete the job correctly.

Covering Chapter 77 in full, this manual spans from general system descriptions and component locations through to detailed removal, installation, adjustment, test, inspection, cleaning, and repair procedures for every major engine indicating component on the PW-powered A330.

File Details

• Manual Type: Aircraft Maintenance Manual (AMM) — Chapter 77
• Brand: Airbus
• Model: A330 (Pratt & Whitney engines)
• Chapter: 77 — Engine Indicating (PW)
• Language: English
• File Format: PDF
• Revision: Revision n° 53, Oct 01/11

Chapters Covered in This A330 Engine Indicating Manual

• 77-00-00 — (PW) Engine Indicating — General: system description, component location, functional designations
• 77-10-00 — (PW) Power: description and operation
• 77-11-00 — (PW) Shaft Speed Indicating: N1 speed (P2.5/T2.5) probe, PMA (N2) stator, ECAM engine/warning display, N1 and N2 indication
• 77-11-11 — Probe — Speed (N1): removal, installation, and adjustment of the N1 speed (P2.5/T2.5) probe
• 77-12-00 — (PW) Pressure Indicating: ambient pressure sensor description and operation
• 77-12-11 — Sensor — Ambient Pressure: removal and installation of left and right ambient pressure sensors
• 77-13-00 — (PW) Engine Pressure Ratio (EPR) Indicating System: EPR indicating system, P2/T2 probe, EPR P4.95 probe, ECAM EPR indication
• 77-13-11 — Probe — EPR P4.95 Thermocouple: removal, installation, EPR P4.95 system leak test, visual inspection
• 77-13-12 — Probe — P2/T2: removal, installation, P2/T2 probe and P2 supply tube leak check, probe heater test, MCDU menus
• 77-20-00 — (PW) Temperature: description and operation
• 77-21-00 — (PW) Exhaust Gas Temperature (EGT) Indicating System: EGT indicating system, T4.95 thermocouple probe, T3 thermocouple probe, EGT/T3 harness, ECAM EGT indication
• 77-21-11 — Probe EGT T4.95 Thermocouple: removal, installation, probe test, visual inspection, cleaning
• 77-21-12 — Harness — EGT/T3: removal and installation (PRE and POST SB PW4G-100-77-5 configurations)
• 77-21-13 — Probe — T3 Thermocouple: removal and installation (PRE and POST SB PW4G-100-77-5, PRE and POST SB PW4G-100-72-131)
• 77-30-00 — (PW) Analyzers: N1 speed location, remote charge converter (RCC), P. Flange accelerometer, EIVMU, EEC, N1 and N2 vibration display
• 77-32-00 — (PW) Engine Vibration Indicating System: system description, engine vibration accelerometer (exhaust case), accelerometer harness
• 77-32-11 — Accelerometer — A — Repairs: No. 1 bearing accelerometer repair kit installation and removal
• 77-32-12 — Accelerometer — Engine Vibration B (Exhaust): removal and installation
• 77-32-13 — RCC (Remote Charge Converter): removal and installation
• 77-32-14 — Harness — Engine Vibration Accelerometer Exhaust: removal and installation

What This Chapter 77 AMM Covers

The Airbus A330 PW Engine Indicating Chapter 77 Aircraft Maintenance Manual covers the complete engine indicating system used to sense, transmit, and display engine operating parameters and component/systems data. It details how the Electronic Engine Control (EEC) receives signals from engine probes and sensors and correlates the data for engine control and cockpit display.

The shaft speed indicating section explains how the N1 speed (P2.5/T2.5) probe generates an oscillation signal proportional to the LPC/LPT coupling rotational speed, with 60 teeth producing a frequency of 216,000 Hz at 100 percent N1. The manual includes the N1 probe gap adjustment procedure using beeswax or paraffin wax to verify the correct shim class, with measurement limits between 0.020 in. and 0.050 in. The N2 speed signal is produced from a winding of the Permanent Magnet Alternator (PMA), and the manual provides the PMA stator component location for both engines.

For pressure indicating, the manual describes the two ambient pressure sensor ports that transmit pressures to a common sensing tube where they are averaged and sent to the Pamb transducer in the EEC. It includes removal and installation procedures for both left and right ambient pressure sensors, with torque values for the clamp bolt, adapter, and castellated nut.

The Engine Pressure Ratio (EPR) indicating system section covers the P2/T2 probe and four P4.95 probes that measure exhaust gas pressure. EPR is the primary parameter used to set thrust, calculated as the ratio of exhaust gas total pressure to front compressor inlet total pressure (P4.95/P2). The manual includes the EPR P4.95 system leak test procedure using regulated dry air or nitrogen at 30 psig, with a maximum allowable pressure decrease of 0.5 psig over 30 to 60 seconds. It also covers the P2/T2 probe heater test using MCDU menus, and P2 supply tube leak checks.

The Exhaust Gas Temperature (EGT) indicating system section covers the four T4.95 thermocouple probes and T3 thermocouple probe. Each EGT probe has six chromel/alumel thermocouple elements in three radial positions, with three elements averaged for Channel A and three for Channel B. The manual provides detailed removal and installation procedures for the EGT probes, T3 probe, and EGT/T3 harness, including torque values for the thermocouple nuts (18–22 LBF.IN for larger ID nuts, 15–18 LBF.IN for smaller ID nuts). The EGT probe test section covers insulation resistance checks (minimum 10K ohms) and continuity checks using a microammeter and hot air blower.

The engine vibration indicating system section covers the No. 1 bearing accelerometer, exhaust case (Flange P) accelerometer, Remote Charge Converter (RCC), and Engine Interface and Vibration Monitoring Unit (EIVMU). It includes the No. 1 bearing accelerometer repair kit installation and removal procedures, with detailed torque values for the kit brackets and sensor mounting bolts. The manual also covers removal and installation of the engine vibration accelerometer (exhaust case), RCC, and accelerometer harness.

Component Locations and Access

The manual includes component location tables with FIN numbers, functional designations, panels, zones, access doors, and ATA references. Key components covered include:

• 4013KS — N1 Speed (P2.5/T2.5) Probe
• 4044KS — PMA Stator / EEC
• 5000EV1–5000EV4 — EPR P4.95 Probes
• 4014KS — P2/T2 Probe
• 4045KS1–4045KS4 — EGT T4.95 Thermocouple Probes
• 4047KS — T3 Thermocouple Probe
• 4028KS — EGT/T3 Harness
• 4002EV — No. 1 Bearing Accelerometer (ACCLRM A)
• 4003EV — Exhaust Case Accelerometer (ACCLRM B)
• 4006EV — Remote Charge Converter (RCC)
• 4580KS — Engine Vibration Accelerometer Harness (Exhaust Case)
• 1KS1 / 1KS2 — EIVMU (Engine Interface and Vibration Monitoring Unit)
• 4000KS — EEC (Electronic Engine Control)

Procedures Included

This Airbus A330 Chapter 77 AMM contains complete maintenance procedures with step-by-step instructions, cautions, warnings, torque values, and referenced figures. Procedures include removal and installation of the N1 speed probe, ambient pressure sensors, EPR P4.95 probes, P2/T2 probe, EGT T4.95 thermocouple probes, T3 thermocouple probe, EGT/T3 harness, No. 1 bearing accelerometer repair kit, engine vibration accelerometer, RCC, and vibration accelerometer harness.

Adjustment and test procedures include the N1 speed probe gap adjustment, EPR P4.95 system leak test, P2/T2 probe and P2 supply tube leak check, P2/T2 probe heater test, and EGT T4.95 thermocouple probe test. Inspection and check procedures include visual inspection of the EPR P4.95 probe and EGT T4.95 thermocouple probe. Cleaning procedures are provided for the EGT T4.95 thermocouple probe.

Safety and Compliance

The manual includes critical safety warnings for thrust reverser deactivation before working on or around the translating cowl, engine shutdown waiting periods (5 minutes for most procedures, 60 minutes before EPR leak test), and cautions regarding electrical connector assembly using the correct tools and procedures to prevent in-flight shutdown risk. Circuit breaker open, safety, and tag procedures are provided for the FADEC A and B engine circuit breakers on panels 722VU and 742VU.

Who This Manual Is For

This Airbus A330 PW Engine Indicating Chapter 77 Aircraft Maintenance Manual is essential for aircraft maintenance engineers, avionics technicians, line maintenance crews, and base maintenance personnel working on Pratt & Whitney powered Airbus A330 aircraft. It is also valuable for aviation training organizations, MRO facilities, and individuals preparing for type ratings or engine indicating system endorsements. The manual is written to Airbus AMM standards with precise technical values and referenced figures throughout.

Get Your Airbus A330 PW Engine Indicating Manual Today

With this Airbus A330 PW Engine Indicating Chapter 77 Aircraft Maintenance Manual, you can confidently perform removal and installation of speed probes, pressure sensors, thermocouple probes, accelerometers, the remote charge converter, and associated harnesses. You can carry out system leak tests, probe heater tests, gap adjustments, and insulation resistance checks using the exact procedures and torque values specified by Airbus for Pratt & Whitney powered A330 aircraft. Correct procedures and specifications matter because incorrect installation of engine indicating components can lead to inaccurate cockpit indications, engine control faults, or in-flight shutdown risk.

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Delivered as an instant PDF download after payment, this manual requires no shipping and no waiting. Access it immediately on any device — laptop, tablet, or smartphone — and print the pages you need for the hangar floor. Whether you are troubleshooting an EPR indication fault, replacing an EGT thermocouple, or installing a No. 1 bearing accelerometer repair kit, this AMM chapter gives you the authoritative reference you need.