Canadair Regional Jet Aircraft Maintenance Manual Chapter 28 Fuel System

Description

Canadair Regional Jet Aircraft Maintenance Manual Chapter 28 Fuel System Overview

The Canadair Regional Jet Aircraft Maintenance Manual Chapter 28 Fuel System is the definitive technical authority for line technicians, MRO engineers, and flight line specialists servicing the complete fuel storage, transfer, and management architectures of the Canadair Regional Jet fleet. Covering all aircraft effectivities, this 868-page factory manual chapter details rigorous maintenance practices, component removal and installation procedures, leak rate classifications, contamination testing protocols, and full-system operational checks. Built directly from engineering data, this manual ensures uncompromised safety compliance, accurate defect troubleshooting, and standard airworthiness maintenance across all operational environments.

File Details

• Document Title: Canadair Regional Jet Aircraft Maintenance Manual – Chapter 28 Fuel
• Manual Type: Aircraft Maintenance Manual (AMM) Chapter
• Brand / Manufacturer: Canadair
• Equipment Model: Canadair Regional Jet
• ATA Chapter: Chapter 28 (Fuel)
• Revision Date: December 10, 2005 (incorporating revisions from April 20, 2004, and August 10, 2005)
• Language: English
• Page Count: 868 pages
• File Format: Adobe PDF
• Serial Effectivity: ON A/C ALL (with specific subtask effectivities covering serial blocks 7003 through 7990 and 8000 through 8068)

Chapters Covered

• 28-00-00 Fuel System – General
  • Description and Operation (Storage, Distribution, and Indicating Systems)
  • Maintenance Practices (Fuel Safety Precautions – General, Health, Electrical, Tools, and Contamination)
  • Adjustment/Test (Operational Test of the Fuel System, EICAS Synoptic Verification, Fire Switch Interfaces)
  • Inspection/Check (Water Contamination Check; Spectrochemical Hydraulic Fluid Contamination Analysis)
• 28-10-00 Storage System
  • Description and Operation (Fuel Tank Architecture, Ram Air Vent System, Multi-Function Transfer System)
• 28-11-00 Fuel Tank System
  • Description and Operation (Main Wet-Wing Tanks, Center Wing Box Tank, Composite Collector Tanks, Restrictors, Balancing Pipes, Drain Valves)
  • Maintenance Practices (Tank Entry Preparation, Fuel Fume Removal, Gas Detector Monitoring, Biobor JF and Kathon FP 1.5 Biocide Treatments)
  • Inspection/Check (Exterior Checks, In-Tank LRU Sealant Inspection, Critical Bonding Jumpers DLRO Testing, Air Pressurization, Fuel Leak Rate Classification)
  • Repairs (Fuel Tank Seal Repair)
• 28-11-01 Fuel Tank Access Panel
  • Removal and Installation (Honeycomb Core and Aluminum Lower Skin Access Panels)
  • Inspection and Check (Damage Checks, Gasket Integrity, Wing Fastener Detailed Visual Checks)
  • Repairs (Fuel-Resistant Coating Touch-Up, Phenolic Strip Adhesive Replacement)
• 28-11-03 Collector Tank (Removal, Fitting Teardown, Gasket Replacement, and Installation)
• 28-11-05 Collector Tank Check Valve (Flapper Valve Removal/Installation and 2-Hour Fuel Head Functional Leak Test)
• 28-11-07 One-Way Flow Valve (Removal and Installation across Wing Stations WS85.5, WS148.0, and WS220.0)
• 28-11-13 Water Drain Valve (Preformed Packing In-Situ Replacement, Valve Body and Housing Removal/Installation)
• 28-11-14 Fuel Drain Valve (Center and Main Tank Poppet Valve Removal and Installation)
• 28-11-17 Center Tank Gravity Fuel Feed Filler Installation (Scupper, Filler Neck, Adapter, and Filler-Cap O-Ring Checks)
• 28-12-00 Vent System
  • Description and Operation (Main and Center Tank Overpressure Relief Valves, Purge Check Valves, Bipetal Flapper Valves, Vent Tubing, Shrouds)
• 28-12-01 Main Tank Relief Valve (Wing-Tip Relief Valve Removal/Installation and Manual Override Operational Test)
• 28-12-02 Center Tank Relief Valve (Sleeve, Transition Tube, Removal/Installation, and Operational Check)
• 28-12-04 Vent-Line-Purge Check Valve (Aft Scavenge Purge Line Removal and Installation)
• 28-12-06 Vent Line Flapper Check Valve (Bipetal Flapper Valve and Forward Vent-Tube Assembly Removal and Installation)
• 28-12-10 Fuel Tank Vent and Fuel Line Shrouds (Pressure Box Assembly and Shroud Drain Fitting Leak Testing)
• 28-13-00 Transfer System
  • Description and Operation (Motive Flow Transfer Ejector Pumps, Scavenge Ejectors, Gravity Crossflow SOVs, Power Crossflow Network, Flight Compartment Controls)
  • Adjustment/Test (Manual and Automatic Crossflow Operational Test)

As a whole, this manual gives line and base technicians an exhaustive standard for maintaining and recertifying the Canadair Regional Jet fuel systems. Every procedure contains complete consumable material lists, part replacement tables, required special tooling references, and precise mechanical torque values, ensuring reliable troubleshooting and compliance with continuous airworthiness requirements.

Comprehensive Storage Architecture & Fuel Management

The fuel storage architecture of the Canadair Regional Jet employs an integral wet-wing configuration comprising two main wing tanks and a center wing box tank, supplemented by dual composite collector tanks. Fuel continuously feeds the engines via motive-flow-operated primary ejectors, backed up by electric boost pumps seated inside self-sealing canisters. Automated crossflow and center-tank transfer functions are orchestrated by the fuel system computer. Center tank fuel is migrated to the main tanks through transfer ejector pumps that actuate when main tank levels fall below 93 percent and shut off when levels reach 97 percent. In the event of a lateral fuel imbalance exceeding 200 pounds (91 kg), the fuel computer commands the auxiliary power unit (APU) pump and dedicated crossflow shutoff valves to restore lateral balance automatically, terminating when the lighter tank exceeds the other by 50 pounds.

Strict Confined-Space Safety & Tank Entry Protocols

Working on commercial aircraft fuel cells requires rigid compliance with safety parameters detailed in this Canadair Regional Jet AMM Chapter 28 Fuel System manual. The document establishes mandatory protocols: maintaining grounding cables to aircraft and ground points, utilizing explosion-proof lamps and drop cords, eliminating all spark-producing electrical apparatus within 100 feet, wearing spark-resistant 100% cotton garments, and completely prohibiting steel wool filament. Tank entry mandates breathing apparatus for entrants and external safety observers. Continuous forced-air ventilation via external air compressors and dedicated air movers is enforced, with an absolute prohibition on operating air blowers until gas detector instrumentation confirms that hydrocarbon fume concentration is at 25 percent or less of the Lower Explosive Limit (LEL).

Contamination Detection, Biocide Sterilization & Leak Evaluation

Maintaining clean fuel is vital to flight safety. This chapter details visual and spectrochemical analysis (ASTM D3605/D5708) to diagnose phosphate-ester hydraulic fluid leaks into wing fuel tanks from adjacent hydraulic plumbing. Action thresholds dictate specific corrective actions: phosphorus levels below 20 PPM permit continued flight monitoring; 20 to 100 PPM requires wing tank draining, access panel removal, sealant inspection, and tank flushing; levels between 100 and 350 PPM demand engine borescope inspections, wet motor cycles, and fuel control unit/pump replacements; while contamination above 350 PPM mandates full APU removal and hot section inspection. For biological fungal and bacterial contamination, full batch blending and metered injection procedures are outlined for Biobor JF (135 ppm maintenance, 270 ppm shock treatment, not to exceed 1000 ppm) and Kathon FP 1.5. Furthermore, external fuel leaks are strictly evaluated into four objective classes: Seep (wet area up to 1.5 inches), Heavy Seep (1.5 to 3.0 inches), Drip (up to 4 drops per minute), and Running Leak (exceeding 4 drops per minute), matched with decisive structural repair criteria.

Professional Capability, Factory Precision & Instant Delivery

Equipping your flight department, repair station, or maintenance facility with this complete Canadair Regional Jet Aircraft Maintenance Manual Chapter 28 Fuel System ensures that all line maintenance tasks, scheduled inspections, leak checks, and component overhaul procedures are executed according to factory standards. Having immediate access to exact part sequence numbers, Wiggins coupling maintenance instructions, electrical connector designations, and specific torque specifications (such as 18–21 lbf·in for aluminum access panels, 25–30 lbf·in for honeycomb panels, and 20–25 lbf·in for fuel drain valves) eliminates guesswork and prevents unnecessary AOG delays. This technical manual is provided as an instant digital PDF download immediately following purchase, allowing instant deployment on shop laptops, field tablets, and hangar workstations with high-resolution zooming and clean card printing capabilities.