SDR ASAA2019070229912

Service difficulty report · Unknown · Boeing 737890

Difficulty date: July 2, 2019
Submitted: July 5, 2019
Operation: Air carrier
Aircraft: N514AS
Make and model: Boeing 737890
Aircraft serial: 35193
Aircraft time: 40,970 hours, 12,267 cycles
System (JASC): 4960 · APU Controls
Part: Unknown
Condition: Malfunctioned
Location: Apu
Stage of operation: IN
How discovered: O
Nature of condition: N
Precautionary procedure: K

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

What was found

APU BITE INOP MSG WHEN ATTEMPTING APU BITE TEST. GROUNDED - YES. APU START, RUNS & LOADS NORMALLY REF AMM 49-11-00-710-801 BUT WILL NOT ENTER APU BITE TEST ON FMC CDU. ACCOMP FIM 49-65 TASK 801, APU ECU WAS RMVD & RE-INSTALLED PER THIS FIM TASK. APU NOW BITE TESTS NORMALLY PER FIM 49-60 TASK 801 AND APU OPS NRML PER AMM 49-11-00-710-801. ETOPS SIGNIFICANT SYS-GRD VERIFICATION SUCCESSFUL.