What was found
APU HAS A HISTORY OF GREATER THAN EXPECTED OIL CONSUMPTION. PREVIOUS TROUBLESHOOTING HAS FOUND NO EVIDENCE OF EXTERNAL LEAKAGE. ACFT GROUNDED. REPLACED THE APU IAW T/C 78349010. LEAK AND OPS CHECKED GOOD.
- Difficulty date
- December 27, 2017
- Submitted
- January 3, 2018
- Operation
- Air carrier
- Aircraft
- N585AS
- Make and model
- Boeing 737890
- Aircraft serial
- 35683
- Aircraft time
- 39,487 hours, 11,813 cycles
- System (JASC)
- 4990 · APU Oil System
- Part
- Apu
- Part number
- 38007021
- Part serial
- P5859
- Condition
- Oil Consumption
- Part time
- 21,492 hours, 34,070 cycles
- Stage of operation
- NR
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.