What was found
APU TREND DATA SHOWS CT5ATP TEMP HAD A SUDDEN INCREASE ABOVE THE THRESHOLD 594 DEGREES. GROUNDED - YES. REPLACED APU REF AMM 49-11-00. LK AND OPS CK GOOD. THIS CLEARS TSR 702262. REMOVED APU SN P-10059 AND INSTALLED SN P-11296.
- Difficulty date
- October 5, 2018
- Submitted
- October 5, 2018
- Operation
- Air carrier
- Aircraft
- N435AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 43292
- Aircraft time
- 19,842 hours, 6,539 cycles
- System (JASC)
- 4920 · APU Core Engine
- Part
- Apu
- Part number
- 38007021
- Part serial
- P10059
- Condition
- Malfunctioned
- Location
- Apu Bay
- Part time
- 5,086 hours, 10,104 cycles
- Stage of operation
- IN
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.