3.2 ac replenishment Flashcards
when working with msds, what must you always do with ppe
wear the approved ppe as outlined in the msds when carrying out replenishing procedures
describe the nato code for fuel
letter/ number code and a symbol to identify fol products
describe the bjsd for fuel
consists mainly of two or more letters followed by a number
letters- code designating the product
numbers- refer to properties such as viscosity and consistency
how do you identify the correct fuel to be used
aircraft rnzaf 700 aircraft replenishment and procedures /ssrps aircrafts replenishment point aircrafts maintenance manual nzap 6005.009-1
what main type of aviation kerosene do we use
what additional types are used
avtur fsII
f34
additional type 1- avtur
f35
jet a-1
additional type 2-
avcat
f44
what types of additives do we use with kerosene based fuel
fuel system icing inhibitors- fsII
anti static additive- ASA
what does FSII do in addition to its main purpose
prevent microbiological growths in the fuel tanks
sources of fuel supply
tanker refuelling
hydrant refuelling
fuel bladder or fuel cell, used with a pump and filter
drum, used with a pump and filter
personal danger with regards to fuel and fuel hazards
toxicity inhalation-nil at room temp eye-minimal skin-minimal oral-slight aspiration- highly hazardous
asphyxiation
dermatitis
removes the natural fats from skin
explain the classifications of fuel contamination
chemical
inadvertent mixing of two or more hydrocarbon fuels or contact of another chemical with fuel
-effects the chemical and physical properties of the fuel and is only detected by laboratory testing
- chemical contamination is prevented by isolating fuels, providing separate handling systems and good housekeeping
biological
- causes fuel to be corrosive, and subsequent damage to ac fuel system
- prevented by fuel quality control, drainage and inspection
what are the types of water contaminants
dissolved
-absorbed by fuel. no effect on ac systems unless precipitated out by cooling
free
-large droplets which stick to the side of the container, or in large groups that settle at the bottom of the tank
entrained
-very fine, cloud like. usually settles to the bottom of the tank
types of emulsions found in contaminated fuel
water
fuel
sediments found in contaminated fuel are usually generated from which sources
rust, dust, grains, tank scales, paint, brass particles, al and fibres, sand
- tanks, pipes, hoses and containers which store the fuel
how are fine particles removed from ac fuel systems
micronic filters with a coalescer fitted to the dispensing vehicle and equipment
safety measures for controlling the quality of fuel
take a fuel sample on ac at first flight of day
dissolved water check at the source/supply
- base refueling section responsible for carrying out checks when ..
fuel is delivered to base by the contractors,
every morning on fuel stored in tanks
every morning on any rnzaf fuel dispensing equipment
a fuelling zone surrounding a fuel vent takes how long to dissipate to a safe level
1 minute after fuel transfer has ceased
when can you refuel/defuel in a hanger and what restrictions must be applied
when a senior engineering officer permits
a manned foam producing fire vehicle to be stationed immediately outside the hanger doors
the hanger doors must be opened
a towing vehicle and driver positioned to remove the aircraft and the equipment in case something goes wrong
what are the safety distances for the operation of transmitters with regards to herf
fuelling and defuelling operations to be carried out so that fuelling zones are at least
10m from any operating vhf or uhf radio
30m from any operating hf radio
30m from any radiating radar
approved flightline management radios of less than 5watts output can be used up the the fuel zone boundaries
methods of refuelling
gravity (over wing, open line)
pressure
hot (engines running)
methods of defuelling
gravity system
completed through the filler cap-suction hose,
fuel tank drain points,
specific defuel cocks
pressurized system
NATO symbol for oil and hydraulic fluid
Oil- square
Hydraulic fluid-circle
Both black
Itypical systems that use aeronautical oils
Gte
Transmission systems
Reduction gearboxes
Air conditioning units
Sources of supply for oil
Cans fitted to oil rigs or dollies 44 gallon drum-hand pump Oil dolly with hand pump 5lt can containers Hydraulic reservoirs can also be replenished using hydraulic test stands
Purpose of replenishing water and waste systems is to
Ensure potable water supplies are clean, fresh and free of contamination
Ensure that waste systems are sanitised properly, contain the correct amount of chemical to maintain sanitation and aren’t going to overflow
Two types of systems water/waste replenishment
- Waste disposal
1) direct exit units herc urinal syst
2) self contained units Orion 6gal chemical toilet - Potable water
Agents used in waste disposal systems or for the cleaning/servicing of these systems are
Chemical compounds
Organic compound decomposition fluid
RNZAF use chemical compounds
Hazard of human waste
Extremely corrosive if spilled on Ac structure
Safety precautions (personal hygiene) water and waste replenishment
Appropriate ppe as defined in Ac mm and msds
Always wash after servicing toilets/sanitary equipment
Waste disposal systems servicing
Remove waste bucket from seat Dispose Flush and clean bucket Replenish toilet with special fluid/water mix Refit Toilet paper
Tech admin for water and waste replenishment
Signed for on the servicing block it was carried out on in the 700
Ac high/low pressure has purpose
Ensure all systems are at the levels required in the
Ssrps
Olm workcards
Ac mm
Types of high/low pressure replenishments
Nitrogen
Low- upto 600
High- 600 and above
Oxygen
Lox
Gox
Identification of high/low pressure gases
Oxygen-Black body white neck
Nitrogen-grey body grey neck
Thread formation- LH combustible
RH-non combustible
Replenishment point markings high low pressure
Nitrogen- black square with circle corners
Oxygen- two black lines
Japan flag one
Charging units low high pressure
Nitrogen- less rig
Oxygen- dependent on the type of oxygenr gox or lox
Hazards, nitrogen
Inert gas Low thermal expansion coefficient Aids in corrosion prevention — Natural asphyxiant Dieselling can occur when carryout replenishment of nitrogen systems.
What’s dieselling
Nitrogen system. Component with a small volume is inflated rapidly and causes a increase in pressure and temperature leading to combustion
Oxygen hazards
Low temperature - materials get weak and brittle
Readiness of the liquid to return to gas(862:1)
Oxygen enriched environment- Shit burns quicker
Common inflation adapters for nitrogen replenishment
Tyre inflation kits
Low pressure chuck
High pressure chuck
Tyre inflation kit consists of
Inflation valve assembly
2-4 gauges
Flexible hose assy
Milton inflation adapter
Hazards gox
Spontaneous combustion
Main contamination-moisture.
Safety precautions nitrogen
All equipment to be free from contamination
Regulators and adapters to be opened slowly
Safety precautions oxygen
Serviceable condition, free of oil, grease and fuel
Hands/clothes clean and free when handling equipment
Pers not to wear hydrocarbon based cosmetic products
Use only tools that form part of a oxygen composite tool kit
If A confined space becomes enriched with large amounts of gox/lox secure operations clear area and provide ventilation
Don’t direct oxygen at pers/clothing
Radio frequency transmitters are not to be used 20m when handling oxygen
Ac purging and replenishment safety precautions ustions
Approved fire extinguisher within reach
Don’t carry out oxygen purging/replenishment while Ac is being replenished with fuel,oil, fluid,maintenance
Ace and gse grounded
Ac electrical sys switched off and external power removed from Ac
Don’t perform oxygen purging during electrical storm
Safety distances kept
Safety distance for purging and replenishment safety precautions
20m Taxiing Ac Vehicles Gpus Non oxygen pers Building and hangers Refuelling tabkers Fuel spills Flammable materials Potential ignition sources 50m Ciggies Naked flame
