# SDR YENA2024112501496

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 23, 2024
- Submitted: November 25, 2024
- Operation: Air carrier
- Aircraft: [N706JB](https://openairdocs.org/aircraft/N706JB), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 03451
- Aircraft time: 60,903 hours, 22,111 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Valve
- Condition: Malfunctioned
- Location: Cabin Temp
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/YENA2024112501496

## Discrepancy

FLT#977, BOS-LAS. (AIRCRAFT DIVERTED TO ORD) 'AFT CABIN INDICATED 54* IN FLIGHT; PERFORMED OPERATIONAL TEST OF THE PACK TEMP CONTROL SYSTEM IAW AMM 21-61-00-710-001. TEST REVEALED TRIM AIR VALVE 12HK AND 13HK FAILED. WHEN TWO TRIM AIR VALVES FAIL THE HOT AIR VALVE WILL AUTOMATICALLY CLOSE. RESET ACSC 2 (57HH) AND RAN PACK TEMP CONTROL SYSTEM TEST AGAIN. ALL FAULTS CLEARED. OPERATED BH PACKS IN ALL RANGES COLD TO HOT AND AFT CABIN.

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