11.10 Flashcards
What tanks have baffles
All by the small ones
What is the purpose of a baffle
Resist fuel from surging due to change in altitude
What does a jettison valve do
Allow to dump fuel during flight
What’s a trim tank
Stores fuel and trims aircraft
What do vent/ surge tanks do
Allow fuel tanks to be vented properly
Where are flexible hoses used
Areas where vibration occurs
What are rigid lines made of
Stainless steel or aluminium alloy
Why don’t you over tighten a leaky fitting
Cause further damage to fitting
Why are lines electrically bonded and grounded
Fuel flow generates static electricity
2 types of fuel
Avgas & jet fuel
Most popular jet fuel
Jet a1
Flashpoint range of jet A & jet A1
43-65 degrees c
Jet A freeze point
-40 degrees c
Jet a1 freeze point
-47
Jet b freezing point
-50 degrees C
3 types of fuel tanks
Rigid
Bladder
Integral
3 types of fuel tanks
Rigid
Bladder
Integral
What’s a sump area
Low area where contaminates and water settle
Advantage of rigid removable fuel tanks
You can easily remove and replace if leaks or malfunctions are found
What is bladder fuel tank made of
Reinforced flexible material
Advantage of bladder tank or rigid
Doesn’t require a large opening within aircraft skin for instillation
Support board material
Fiberglass
What’s the most common location for integral tank
Wings , they are known as wet wings
What’s an integral tank
Fuel tank part of the structure
What’s the need for nitrogen generating system
Improve saftey by replacing oxygen for nitrogen in fuel tanks
Reduces the risk of tank explosion
Where is the nitrogen generating system air from that it removes oxygen from
Engine bleed air system
What does the air separation module do
Uses hollow fibre membranes to separate nitrogen and oxygen based on particle sizes and diffusion rates
What is low flow in ngs
Used to conserve bleed air to protect the heat exchanger
Prolongs life of the asm
What’s high flow in ngs
Used in decent to keep the oxygen level low to a max of 12%
4 classifications of a leak
Stain - less then 3/4 inch
Seep - 3/4 - 1.5’’
Heavy seep - 1-5 - 4”
Running leak - pool and drip
How long do you monitor surface area of a fuel leak for
30 minutes
What does SFAR88 do
Manufactures must inspect fuel systems and components
Operators must introduce improved maintenance programs and adjustments to avoid ignition sources
What are CDCCL
Components which fail and interact with fuel system can create an unsafe condition
Causes of ignition of fuel Vapor’s
Electrical cars
Filament heating
Friction sparks
Hot surface ignition or auto
What do gas detectors in fuel tanks do
Measure the concentration of combustible vapours
2 members of fuel tank team
Confined space entrant and stanby person
What areas do you check before closing fuel tank
Fuel and water drain holes and paths
Fuel scavenge system components
Fuel quantity indicating systems components
Where are auxiliary tanks
Horizontal stabiliser or cargo
