SDR ASAA2019011527874

Service difficulty report · Oil System · Boeing 737890

Difficulty date: January 15, 2019
Submitted: January 23, 2019
Operation: Air carrier
Aircraft: N516AS
Make and model: Boeing 737890
Aircraft serial: 39044
Aircraft time: 38,374 hours, 11,614 cycles
System (JASC): 4990 · APU Oil System
Part: Oil System
Condition: Low
Location: Apu
Stage of operation: TX
How discovered: O
Nature of condition: J
Precautionary procedure: K

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

What was found

UPON LANDING IN HNL AND AFTER ONE START ATTEMPT ON THE APU THE APU "LOW OIL PRESSURE" LIGHT ILLUMINATED AND DID NOT EXTINGUISH. NO FURTHER START ATTEMPTS WERE CONDUCTED. GROUNDED - YES. REF AMM 12-13-31 VERIFIED APU OIL LEVEL USING SIGHT GLASS PROCEDURE, ADDED .5 QUART NO OTHER FAULTS NOTED. RELEASED PER MEL 49-99A DUE TO APU START FAULT. COLD SOAK START ACCOMPLISHED ON FLT 793, SUCCESSFUL. THIS CLEARS MEL 49-99A.