What was found
AIRCRAFT WAS GROUNDED: EXTERNAL POWER DROPPED WITHOUT POWER BEING PULLED AND ASSOCIATED ELECTRICAL BURNT SMELL. APU WAS REPLACED WITH AN 8130 CERTIFIED APU. PER WITH TASK CARD 08C30049002, OPERTIONAL CHECKS GOOD.
- Difficulty date
- January 8, 2025
- Submitted
- February 17, 2025
- Operation
- Air carrier
- Aircraft
- N918NN
- Make and model
- Boeing 737823
- Aircraft serial
- 33228
- Aircraft time
- 35,237 hours, 15,216 cycles
- System (JASC)
- 4900 · Airborne Auxiliary Power Unit (APU) System
- Part
- Apu
- Part number
- 38007021
- Condition
- Odor
- Location
- Zone 100
- Stage of operation
- TX
- How discovered
- O
- Nature of condition
- B
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.