# SDR CALA2026081718670

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 15, 2026
- Submitted: August 17, 2026
- Operation: Air carrier
- Aircraft: [N27959](https://openairdocs.org/aircraft/N27959), registered now
- Make and model: Boeing 787-9
- Registry model: [Boeing 787-9](https://openairdocs.org/model/boeing-787-9) (OpenAirDocs)
- Aircraft serial: 36407
- Aircraft time: 51,560 hours, 4,943 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Acm
- Condition: Failed
- Location: Right
- Stage of operation: TX
- 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/CALA2026081718670

## Discrepancy

STRONG ACRID ODOR WHEN APU RUNNING.   CREW DEBRIEFED. ON ENG SHUTDOWN, RT PACK ACM FAILED AND CAUSED BURNING ODOR IN CABIN ALONG WITH ASSOCIATED STATUS MESSAGES. TESTING SHOWED RT ACM FAILED & MEL APPLIED ON LP 9971449. CONDITIONAL INSPECTION FOR SMOKE/ODOR IAW AMM DMC-B787-A-05-51-99-99A-282A-A COMPLETED. RAN PACKS, NO ODOR AFTER MEL APPLIED. OK TO CONTINUE FOR FLIGHT.

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