- Difficulty date
- December 5, 2017
- Submitted
- December 6, 2017
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41727
- Aircraft time
- 6,470 hours, 2,189 cycles
- Part
- Ecu
- Part number
- 707208601
- Part serial
- 6505150201701
- Condition
- Faulted
- Part time
- 6,467 hours, 2,188 cycles
- Stage of operation
- IN
- 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
WHILE T/S APU FOUND FAULT CODE 49-72105 DMM SHOWS CIRCUIT FAILURE IN MAINT HISTORY STATS 3-25. GROUNDED - YES. ACCOMPLISHED B737-900 FIM 49-70 TASK 808. RMVD AND INSTALLED NEW APU ECU REF 49-11-01 AND 49-61-12. ACCOMPLISHED INSTALL TESTS REF 49-61-12. ALL TESTS PASSED. SYS CKS NORMAL.