What was found
APU TREND DATA SHOWS CT5ATP TEMP IS AT OR ABOVE THE 605 DEGREE THRESHOLD. GROUNDED - YES. REMOVED AND REPLACED APU ASSY IN REF TO AMM 49-11-00-4100-803 OPS AND LEAK CK GOOD.
- Difficulty date
- July 12, 2019
- Submitted
- July 12, 2019
- Operation
- Air carrier
- Aircraft
- N407AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41731
- Aircraft time
- 26,378 hours, 8,455 cycles
- System (JASC)
- 4920 · APU Core Engine
- Part
- Apu
- Part number
- 38007021
- Part serial
- P9591
- Condition
- Malfunctioned
- Location
- Apu Bay
- Part time
- 7,138 hours, 13,889 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.