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If the preparation of the external load by ground crew played a role, also code under RAMP.

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Failures or malfunctions of the onboard external load handling lifting equipment or release systems should be coded under SCF-NP, as these are considered to be aircraft systems.

FIRE/SMOKE (NON-IMPACT) (F–NI)

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Includes fire due to a combustive explosion from an accidental ignition source. 

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Includes fire and smoke from system/component failures/malfunctions in the cockpit, passenger cabin, or cargo area.

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Non-combustive explosions such as tire burst and pressure bulkhead failures are coded under System/Component Failure – Non-Powerplant (SCF–NP). 

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Fire/Smoke resulting from an accident impact is coded under Fire/Smoke (post-impact) (F–POST).

FIRE/SMOKE (POST-IMPACT) (F–POST)

Fire/Smoke resulting from impact. 
Usage Notes:
.  
This category is only used for occurrences where post impact fire was a factor in the outcome. 

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This category is only used in conjunction with another category.  For example, a system/component failure that also results in a post-impact fire will be coded as SCF–PP and F–POST or SCF–NP and F–POST.

 FUEL RELATED (FUEL)

.  The following fuel-related definitions are provided for clarity: 
- Exhaustion: No usable fuel remains on the aircraft. 

-Starvation/mismanagement: Usable fuel remains on the aircraft, but it is not available to the engines. 
-Contamination: Any foreign substance (for example, water, oil, ice, dirt, sand, bugs) in the correct type of fuel for the given powerplant(s).
-Wrong fuel: Fuel supplied to the powerplant(s) is incorrect, for example, Jet A into a piston powerplant, 80 octane into a powerplant requiring 100 octane.
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Includes cockpit crew or ground crew-induced fuel-related problems that are not the result of mechanical failures.  Interruptions of the fuel supply caused by mechanical failures are coded elsewhere as non-powerplant or powerplant system/component failures (SCF–NP or SCF–PP), as appropriate.

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Also used when the wrong fuel causes a powerplant failure (e.g., through detonation).  In this case it should be coded as FUEL, not as a system/component failure or malfunction-powerplant (SCF–PP).

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Includes cases where there was a high risk of fuel exhaustion but there was no actual loss of power.

GLIDER TOWING RELATED EVENTS (GTOW)

Premature release, inadvertent release or non-release during towing, entangling with towing, cable, loss of control, or impact into towing aircraft/winch.
　
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