Chapter 4 - Fuel System Maintenance

Question 1

Principle threats for fuel

Answer 1

Foreign particulates

Water (suspended or free)

Microbiological Organisms

Cross contamination

Question 2

User Responsibility aim

Answer 2

To ensure the integrity and quality of the product from its receipt to the point of issue and use

Question 3

Water sediment check procedure

Answer 3

Sample is drained from a valve, visual check for free water (lighter fuel will be floating) if cloudy then may be evidence of a water/fuel emulsion, if slimy then possible microorganisms

Question 4

Water detection capsule

Answer 4

Syringe used to draw liquid through a detection capsule, paper will turn blue if too much water present

Question 5

Fuel system testing

Answer 5

Leak checks

Fuel flow test

Question 6

Rigid tank maintenance

Answer 6

Leaking will require removal and specialist repair

Question 7

Flexible tank maintenance

Answer 7

Leaking will require repair by the manufacturer therefore replacement is almost always inevitable

Question 8

Leak rate affected by:

Answer 8

Cavity drain blockage

Tank being plugged by contact with the AC structure

Self sealing layer activation

Fuel tank level

AC attitude

Tank pressurisation

Question 9

personal preotection requirements

Answer 9

Avoid breathing fumes given off by fuels and solvents

Protect the skin by wearing approved protective clothing and barrier cream

Question 10

Requirements entering a fuel tank

Answer 10

Must be medically examined

Wear a remote intake breathing apparatus

The intake end of the respirator is clear and upwind of fuel tank

Correct PPE

Correct type of fire extinguishers nearby

Must have an observer for safety

Time in tank must be controlled and supervised to ensure it adheres to current guidelines