SDR UIEA2021100502188

Service difficulty report · None · Boeing 767375

Difficulty date: October 4, 2021
Submitted: October 6, 2021
Operation: Air carrier
Aircraft: N1709A
Make and model: Boeing 767375
Aircraft serial: 24086
System (JASC): 4900 · Airborne Auxiliary Power Unit (APU) System
Part: None
Condition: None
Stage of operation: CR
How discovered: V
Nature of condition: O
Precautionary procedure: K

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

What was found

APU RELIABILITY COLD START ACCOMPLISHED AT FL380, -56 DEGREES C ON FIRST ATTEMPT, FOLLOWED BY APU GEN OFF MESSAGE. GEN RESET WITH QRH PROCEDURE.(<P>PERFORMED BITE PROCEDURE ON ECU PER FIM 49-11 FT958. NO FAULTS NOTED. SYSTEM OK.</P> / <P>LP 1373456, ITEM M2: PERFORMED APU ECU BITE TEST PER FIM 4911 F/T 958, NO FAULTS NOTED. PERFORMED BPCU BITE TEST PER FIM 24-20 F/T 801, SYSTEM CHECK OK, OPS CHECK APU, OPS CHECK NORMAL IAW AMM 49-11-00.</P>)