What was found
APU "MAINT" LIGHT ILLUMINATED AND STAYED ON WHEN APU WAS STARTED AFTER LANDING. APU OPERATED NORMAL. GROUNDED - YES. REMOVED AND REPLACED APU ECU IAW B737-900 AMM 49-61-12. OPS CK NORMAL. CSSP OK ON 3/27.
- Difficulty date
- March 15, 2022
- Submitted
- March 31, 2022
- Operation
- Air carrier
- Aircraft
- N483AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 36350
- Aircraft time
- 24,156 hours, 7,641 cycles
- Engine
- Ge
- System (JASC)
- 4940 · APU Start/Ignition System
- Part
- Ecu
- Part number
- 707208601
- Part serial
- 6505150200145
- Condition
- Faulty
- Location
- Aft Cargo Compt
- Part time
- 26,282 hours, 9,031 cycles
- Stage of operation
- LD
- How discovered
- V
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.