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Aircraft mechanics > 3.2 > Flashcards

3.2 Flashcards

1
Q

Fol identification systems are specified in the

A

5-9-1

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2
Q

The nato symbol for fuel is

NATO identification markings consist of what to identify fol products

A

Four pointed star

A letter and number code

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3
Q

The bjsd identification system consists of what

A

Two or more letters followed by a number

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4
Q

Marked next to a replenishmentpoint would be what identification markings

A

NATO code
NATO symbol
Bjsd

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5
Q

Identification of the correct fuel to be used can be found in five location

A 
F700
As+rps
Ac replenishment point
Ac mm 
591
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6
Q

The RNZAF uses one main type of aviation fuel. What is it

A

Aviation kerosene with two additional types utilised
Avtur fsII -bjsd
F34- nato code

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7
Q

What additives are used to improve the quality of kerosene based fuel in the RNZAF

A

Fuel system icing inhibitors-FSII

Anti static additive-ASA

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8
Q

What does FSII do

A

Prevents water in the fuel from freezing into ice crystals. Prevents microbiological growths

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9
Q

Sources of fuel

A

Tanker refuelling
Hydrant refuelling
Fuel bladder or cell used w pump and filter
Drum used w pump and filter

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10
Q

Personal dangers associated with avtur

A 
Toxicity
-oral: slight
Aspiration: highly at room temp
Inhalation:nil
Eye: minimal
Skin: minimal

Asphyxiation-vapours

Dermatitis-removes natural fats

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11
Q

Fuel contamination categories

A

Chemical and material

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12
Q

Types of chemical contamination

A

Inadvertent mixing of two or more hydrocarbon fuels or contact of another chemical with fuel

Biological contamination-maintenance procedures are inadequate or fuels installations are of interior design

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13
Q

Things to note with chemical contamination of fuel

A

Affects the chemical and physical properties of the fuel and is generally detected by laboratory testing

Prevented by isolating fuels, providing seperate handling systems and housekeeping procedures

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14
Q

Things to note with biological contamination of fuel

A

May causefuel to become corrosive with subsequent deterioration to fuel sys.

Controlled by Base fuel quality control personel with careful sampling

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15
Q

Material contamination consists usually of what

A

Water, emulsions and sediments

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16
Q

Water contamination has how many forms and what are they

A

Dissolved water-small % is absorbed by the fuel and is not visible. Has no effect on Ac fuel sys. Unless precipitated out by cooling Which causes ice to form on components
Free water-large droplets which cling to the side
Entrained water-very fine cloud like droplets. Usually settles at the bottoms of the tank.

17
Q

What are emulsions

A

Liquids suspended in other liquids

18
Q

Interface of emulsions in highly contaminated systems looks like

A

Thick brown black mayonnaise like matter

19
Q

Notes about sedimental material contamination

A

Sourced from tanks, pipes, hoses or containers which store it.

Micronic filters are included with a coalescer fitted to all RNZAF fuel installations, dispensing vehicles and stationary equipment

20
Q

Fuel quality control checks are done where and how

A

Ac- prior to first flight of day, sampled from all drain points and each sample individually checked

Supply/source-refuelling section on each Base responsible for control checks every time fuels delivered to Base. Every morning fuel is stored in tanks and every morning on any dispensing equipment

21
Q

Fuelling methods

A

Gravity-over wing/open line
Pressure
Hot

22
Q

Defuellig methods

A

Gravity
Filter cap-suction hose, fuel tank drain points, specific defuel cocks
Pressurised
Using the refuelling coupling

23
Q

Occasions when refuelling defuelling of Ac is not permitted

A

During electrical storms that are closer than 5km
With the propulsion engines running (exception:hot refuelling)
If the Ac has unsafe armament equipment fitted
When oxygen systems are being replenished
When refuelling through open orifice systems during dust/sand storms
When refuelling through open orifice systems with other Ac being run at high Power nearby
When he radar equipment or Hf radio is being operated within 30m of fuelling zone

24
Q

Safety precaution/hazard control for ground mechanical equipment

A

Vehicles other than those engaged in Ac servicing functions aren’t permitted to approach Within 20m
Not parked under wings while fuelling is in progress
High vehicle maintenance for internal combustion equipment to prevent arcing across electrical terminals, electrical short circuits and emission of sparks causing backfire

25
Q

Responsibilities of pers refuel de fuel

A 
Fire extinguisher
Correct fuel
Remove caps/drain plugs
Serviceable bonding point/bonded nozzle
Replenishment iaw rp 
Ensure air escape via fuel tank vents 
Serviceability/refit of caps/drain plugs
For hydrant refuels at other than RNZAF facilities, ensure a 1lt sample is drawn from hydrant or filter/water separator sump at completion of refuel. “Bright clear water free”
Sign RNZAF157 for fuel received/supplied 
Enter in 700
26
Q

Sequence of bonding for refuel defuel Ac with tanker

A

Earth to Ac
Tanker to same earthing point
Tanker to Ac
Pers involved to touch an earth conductor to themselves to discharge static
Connect tanker hose bonding plug/clamp to a point adjacent to Ac fuelling point
Open inlet of fuel point
Disconnect in reverse order

27
Q

Fuel sample procedure

A

Clear glass bottle of 1lt capacity. Specific to Ac type
Pulse when taking sample to ensure a vortex isn’t created
Vortex sample.
Examine- clear bright free from sediment, suspended matter and Undissolved water
If first sample is contaminated take another, not pulsed.

28
Q

Dissolved water check procedure

A

Hydro fuel test kit used. Shell water test used by RNZAF

At the conclusion of test wet capsule, ensure it turns green/blue

29
Q

Admin for refuel defuel

A

RNZAF 157

RNZAF 700

30
Q

Fuel spillage ????!! What do

A

Restrict movement in spillage area
Prevent sparks
Treatment of spillage
Prevent ingress of fuel into sewer drain

Aircraft mechanics (14 decks)

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