What was found
PERFORMED CSS APU START. FIRST TWO ATTEMPTS FAILED AT FL350, FAULT LIGHT ON FIRST, LOW OIL PRESSURE ON SECOND. APU STARTED ON 3RD ATTEMPT AT FL310. GROUNDED - YES. REMOVED AND REPLACED APU LUBE MODULE. REF B737-900 AMM 49-91-11.
- Difficulty date
- March 24, 2023
- Submitted
- April 4, 2023
- Operation
- Air carrier
- Aircraft
- N469AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41702
- Aircraft time
- 32,425 hours, 10,305 cycles
- System (JASC)
- 4990 · APU Oil System
- Part
- Module
- Part number
- 41310203
- Part serial
- 6033
- Condition
- Faulty
- Location
- Apu
- Part time
- 14,370 hours, 22,635 cycles
- Stage of operation
- CR
- How discovered
- V
- Nature of condition
- J
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.