SDR IPXA2025011604140

Service difficulty report · Warning Message · Boeing 75724APF

Difficulty date: January 15, 2025
Submitted: January 16, 2025
Operation: Air carrier
Aircraft: N470UP
Make and model: Boeing 75724APF
Aircraft serial: 25486
Aircraft time: 34,567 hours, 20,670 cycles
System (JASC): 4900 · Airborne Auxiliary Power Unit (APU) System
Part: Warning Message
Condition: False Activation
Location: Apu
Stage of operation: CL
How discovered: O
Nature of condition: N
Precautionary procedure: A

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

What was found

AIR TURNBACK, APU FAULT CLIMBING THROUGH 15,000Â€™. DID NOT RESTART PER QRH PROCEDURE. ACCOMPLISHED APU BITE REF 757 FIM 49-11-875. NO FAULTS FOUND ON ECU. INSPECTED APU REF FOUND NO DEFECTS. OPERATED APU REF 757 M/M CHAP 49- 11-00- 802-00. APU STARTED AND OPERATED NORMALLY WITH AND WITHOUT LOADS.

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