# SDR AALA202602036015

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 30, 2026
- Submitted: February 3, 2026
- Operation: Air carrier
- Aircraft: [N781AN](https://openairdocs.org/aircraft/N781AN), registered now
- Make and model: Boeing 777223
- Aircraft serial: 29586
- Aircraft time: 98,516 hours, 12,315 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Acm
- Part number: 8102092
- Condition: Contaminated
- Location: Zone 100
- Stage of operation: DE
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202602036015

## Discrepancy

AIRCRAFT WAS GROUNDED: CREW NOTICED STRONG WET SUCK ODOR BEGAN AT 9000K ON DESCENT FROM REAR TO FRONT.  REMOVED AND REPLACED LEFT HAND (AALA202601307475) AND RIGHT HAND (AALA202602038634) HEAT EXCHANGERS, PER JOB CARD 72L00021001. REMOVED AND REPLACED RIGHT HAND ACM-AIR CYCLE MACHINE (AALA202602036015), PER AMM 21-52-02.

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