# SDR AALA202609166078

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 14, 2026
- Submitted: September 17, 2026
- Operation: Air carrier
- Aircraft: [N761AJ](https://openairdocs.org/aircraft/N761AJ), registered now
- Make and model: Boeing 777223
- Aircraft serial: 31478
- Aircraft time: 91,218 hours, 11,577 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Acm
- Part number: MAC5423
- Condition: Seized
- Location: Zone 100
- Stage of operation: CL
- How discovered: O
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202609166078

## Discrepancy

AIRCRAFT WAS GROUNDED:  AIR RETURNED AND DECLARED AN EMERGENCY.  SMOKE IN THE CABIN.  FOUND RIGHT PACK AIR CYCLE MACHINE SEIZED CAUSING SMOKE.  DEFERRED IAW MEL 21-42A, RT PACK INOPERATIVE.  MAINTENANCE REMOVED AND REPLACED RT ACM IAW AMM 21-52-02. OPS CHECK GOOD.

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