SDR Q0MF200107068

Service difficulty report · Apu · Boeing 737823

Difficulty date: July 3, 2001
Submitted: July 19, 2001
Operation: Air carrier
Make and model: Boeing 737823
Aircraft serial: 30636
Aircraft time: 927 hours, 949 cycles
System (JASC): 4920 · APU Core Engine
Part: Apu
Part number: 38007021
Part serial: P5873
Condition: Inoperative
Location: Apu Bay
Part time: 879 hours, 972 cycles
Stage of operation: TX
How discovered: O
Nature of condition: M, J
Precautionary procedure: O

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

What was found

OUR AIRPLANE, B-16805, HAD APU AUTO-SHUTDOWN AFTER 3 OR 4 SOUNDS OF SURGE.APU BITE CHECK FOUND THAT MSG 49-21015 OVERTEMP SHUTDOWN¨. IAW MEL 49-1, CAT.¡§C¡¨, C/F TO DD ITEM. FURTHER CHECK, FOUND THAT THERE ARE MANY METAL CHIPS IN THE GEARBOX. REPLACED THE APU AT JULY 8, 2001.