SDR CALA2016042200244

Service difficulty report · Warning System · Boeing 737824

Difficulty date: April 21, 2016
Submitted: April 22, 2016
Operation: Air carrier
Aircraft: N73299
Make and model: Boeing 737824
Aircraft serial: 34005
Aircraft time: 35,230 hours, 12,264 cycles
System (JASC): 4970 · APU Indicating System
Part: Warning System
Condition: False Activation
Location: Cockpit
Stage of operation: CR
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 SHUTDOWN IN FLIGHT DUE TO AMBER LOW OIL PRESS LIGHT. TROUBLE SHOT IAW FIM 49-90-10. BITE SHOWS FAULT 49-91007. CHECKED APU OIL AT CDU, SHOWS FULL. PHYSICALLY CHECKED APU OIL SIGHT GLASS, JUST ABOVE ADD. ADDED OIL IAW AMM 12-13-31. INSPECTED MAG CHIP, NO CONTAMINANTS. NO SIGNS OF OIL LEAK, ALL CONNECTORS TIGHT. AS PRECAUTIONARY, R & R LOW OIL PRESS SWITCH IAW AMM 49-94-22. OPERATIONS GOOD, NO LEAKS, NO FAULT, FAULT DATA FAULT CODE 1 49-91007 FAULT COMMENTS, NONE.