# SDR AALA202605123381

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 11, 2026
- Submitted: May 13, 2026
- Operation: Air carrier
- Aircraft: [N938NN](https://openairdocs.org/aircraft/N938NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 33490
- Aircraft time: 36,651 hours, 16,065 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: A/C Pack
- Part number: 22064002
- Part serial: 5737
- Condition: Seized
- Location: Zone 100
- Part time: 32,827 hours, 13,754 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: B, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202605123381

## Discrepancy

AIRCRAFT WAS GROUNDED: APU BLEED SUPPLYING BOTH PACKS AND ENGINE BLEEDS OFF, A BURNT GUN POWDER SMELL WAS OBSERVED SIMULTANEOUSLY WITH AN OBVIOUS TEMPERATURE INCREASE. THE LEFT PACK LIGHT ILLUMINATED.   REMOVED AND REPLACED LEFT HAND ACM. PER J/C 08L00021001.

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