PPS name interpretation:

example: U24N201

U-->unit


24-->ATA code. Index:

21:Air conditioning
22:Auto flight
23:Communications
24:Electrical power
25:Equipment and furnishing
26:Fire extinguishing
27:Flight controls
28:Hidraulic power
29:Fuel
30:Ice and rain protection
31:Indicating and recording
32:Landing gear
33:lights
34:Navigation
35:Oxygen
36:Pneumatics
49:Auxiliary Power Unit (APU)
70:Power plant

N-->category of the unit

P:system presentation
N:normal operation
A:abnormal operation
S:Summary

201-->Section 2 subsection 01

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