SDR ASAA12511567

Service difficulty report · Sensor · Boeing 737890

Difficulty date: May 18, 2012
Submitted: May 18, 2012
Operation: Air carrier
Aircraft: N512AS
Make and model: Boeing 737890
Aircraft serial: 39043
Aircraft time: 15,126 hours, 4,491 cycles
Engine: Cfmint CFM567B273
System (JASC): 4990 · APU Oil System
Part: Sensor
Condition: Malfunctioned
Location: Apu Oil Temp
Stage of operation: IN
How discovered: 9
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 HAS HISTORY OF FAULT LIGHT ILLUMINATION WITH FAULT 49-91005 BEING LOGGED IN FAULT HISTORY. ACFT GROUNDED. ACCOMPLISHED TSR, NO FAULTS IN CURRENT STATUS PAGE 1 FAULT IN HISTORY FOR 49-910055. RAN APU WITH NO LOAD FOR 10 MINUTES, OIL TEMP WAS 80 DEG C APU FULL LOAD OIL TEMP WAS 81 DEG C. ENG RECOMMENDS REPLACING OIL TEMP SENSOR AND IGNITER PLUG. REPLACED OIL TEMP SENSOR IAW AMM 49-94-21. REPLACED IGITER PLUG IAW AMM 49-41-51.