What was found
APU "FAULT" CAUTION LIGHT DURING GROUND START. GROUNDED - YES. REMOVED AND REPLACED THE APU START CONVERTER UNIT. OPS CHECK GOOD. REF AMM 49-41-61-400-801. THIS CLEARS MEL 49-1B. PLACARDS REMOVED SEAMC FELIX NOTIFIED.
- Difficulty date
- November 13, 2021
- Submitted
- November 22, 2021
- Operation
- Air carrier
- Aircraft
- N440AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41705
- Aircraft time
- 30,072 hours, 9,648 cycles
- System (JASC)
- 4940 · APU Start/Ignition System
- Part
- Converter
- Part number
- 1152466250
- Part serial
- 115246604420
- Condition
- Faulty
- Stage of operation
- TX
- 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.