SDR P5CA202001310023

Service difficulty report · Control Valve · Boeing 7673JHF

Difficulty date: January 29, 2020
Submitted: February 4, 2020
Operation: Air carrier
Aircraft: N644GT
Make and model: Boeing 7673JHF
Aircraft serial: 37810
Aircraft time: 17,004 hours, 4,114 cycles
System (JASC): 4940 · APU Start/Ignition System
Part: Control Valve
Part number: 97980612
Part serial: 1379C
Condition: Malfunctioned
Location: Apu
Stage of operation: TX
How discovered: O
Nature of condition: O
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

APU SHUT DOWN DURING ENG START, UNABLE TO RESTART.(TRANSFERRED TO MDDR 124080, APPLIED DDG 49-11-01B, CAT 'B'.LP 952758: REMOVED AND REPLACED APU SURGE CONTROL VALVE IAW AMM 49-53-01. PERFORMED APU STARTING AND OPS CHECK OK, NO LEAKS. THIS CLEARS MDDR 124080. )

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