What was found
APU TREND DATA SHOWS CT5ATP TEMP SPIKE THAT MAYBE CAUSED BY ECU SOFTWARE. ACFT GROUNDED. REMOVED AND REPLACED THE APU ECU IAW AMM 49-61-12-000-801, AND 49-61-12-400-801. OPS CHECKED GOOD.
- Difficulty date
- February 6, 2018
- Submitted
- February 7, 2018
- Operation
- Air carrier
- Aircraft
- N407AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41731
- Aircraft time
- 20,785 hours, 6,742 cycles
- System (JASC)
- 4960 · APU Controls
- Part
- Ecu
- Part number
- 707208601
- Part serial
- 6505150200188
- Condition
- Faulted
- Location
- Apu
- Part time
- 20,800 hours, 6,750 cycles
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.