Service difficulty report · Control Valve · Boeing 737990ER
FAA SDR system
- Difficulty date
- March 12, 2022
- Submitted
- March 17, 2022
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 35206
- Aircraft time
- 32,278 hours, 10,320 cycles
- Part
- Control Valve
- Part number
- 1605501
- Part serial
- 2909
- Condition
- Faulty
- Location
- Apu
- Part time
- 8,749 hours, 14,224 cycles
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU SHUTDOWN DUE TO HIGH OIL TEMPERATURE. GROUNDED - YES. ACCOMPLISHED APU BITE AND FOUND FAULT 49-91005 FAULT IS PRESENT IN TWO OPEN LEGS. ACCOMPLISHED MAG APU DRAIN PLUG INSPECTION, NO DISCREPANCIES IAW B737-900 AMM 49-91-81, VERIFIED APU OIL IS FULL. ACCOMPLISHED B737-900 FIM 49-90 TASK 801. R&R APU OIL TEMP CNTL VALVE REF AMM TASK 49-91-21-000-801/400-801, OPS CK'D GOOD. ALSO, R&R APU OIL TEMP SENSOR REF AMM 49-94-21-000-801/400-801, OPS CK'D GOOD. APU OK FOR SERVICE.