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Upskill / Aircraft Maintenance / Fuel systems: storage, feed and quantity

Fuel systems: storage, feed and quantity

Tanks, fuels, feed and crossfeed, refuelling, quantity indication, fuel tank safety and maintenance under CS-25 and 14 CFR Part 25

By Aerospace Garage Desk · In practice · 45 minutes · 24 narrated pages

What you will be able to do

  • ✓ Describe the storage, feed, management and indication functions of a transport aeroplane fuel system and the CS-25 and Part 25 paragraphs behind them.
  • ✓ Explain jet fuel properties, water and microbial contamination, and the sumping and additive practices that control them, using the G-YMMM findings.
  • ✓ Apply feed, crossfeed and jettison principles, including a fuel balance check before correcting an imbalance.
  • ✓ Calculate refuel quantities from density and read magnetic level indicators to check or replace fuel quantity indication.
  • ✓ Explain fuel tank ignition prevention, flammability reduction, inerting and CDCCL control, and the training that supports them.
  • ✓ Plan safe tank entry, classify fuel leaks, isolate common faults and apply MEL relief correctly.

Course content

Session 1 · How a transport fuel system works

1.1

  1. What a fuel system must do · free preview
  2. Tank layout: wing, centre, trim, surge and vent
  3. The certification basis: 25.951 to 25.1001
  4. Worked example: litres to kilograms and the refuel check
Session 2 · Fuels, water and contamination

1.2

  1. Jet fuel: grades, density and freezing point
  2. Additives and microbial contamination
  3. Water, sumps and drains
  4. From the investigation file: ice in the fuel feed of G-YMMM
Session 3 · Feed, crossfeed, transfer and jettison

1.3

  1. Boost pumps and engine feed
  2. Crossfeed, transfer and suction feed
  3. Fuel jettison
  4. Worked example: a fuel imbalance decision
Session 4 · Refuelling and fuel quantity indication

1.4

  1. Pressure refuelling
  2. Capacitance probes and the fuel quantity computer
  3. Magnetic level indicators and FQIS failures
  4. Worked example: reading a magnetic level indicator
Session 5 · Fuel tank safety and flammability

1.5

  1. Ignition prevention: TWA 800 and SFAR 88
  2. Flammability reduction and inerting
  3. CDCCL and fuel tank safety training
  4. Worked example: a boost pump change with CDCCL items
Session 6 · Maintenance, troubleshooting and dispatch

1.6

  1. Fuel tank entry and confined space safety
  2. Fuel leaks: classification and repair
  3. Troubleshooting and MEL relief
  4. Worked example: a leak classification decision

Upskill courses are for professional development and are not approved by any aviation authority. Learner Terms

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