SDR ASAA2014112209725

Service difficulty report · Warning Message · Boeing 737890

Difficulty date: November 22, 2014
Submitted: November 25, 2014
Operation: Air carrier
Aircraft: N592AS
Make and model: Boeing 737890
Aircraft serial: 35190
Aircraft time: 26,147 hours, 8,148 cycles
System (JASC): 4990 · APU Oil System
Part: Warning Message
Condition: False Activation
Location: Apu Oil
Stage of operation: TX
How discovered: O
Nature of condition: N
Precautionary procedure: O

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

What was found

APU MAINT LIGHT ILLUMINATED AFTER APU START. ACFT GROUNDED. PERFORMED APU BITE AND FOUND ERROR MSG 49-91227, LOW OIL QTY. INSPECTED APU AND FOUND OIL LEVEL ON THE FULL POSITION ON SIGHT GLASS, IAW AMM 12-13-31. PERFORMED LOW OIL QTY FAULT ISOLATION REF TASK 49-90, TASK 804, APU OPS CHECKED GOOD, NO MORE FAULTS.