# SDR ASAA2021120436823

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 4, 2021
- Submitted: December 8, 2021
- Operation: Air carrier
- Aircraft: [N569AS](https://openairdocs.org/aircraft/N569AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35184
- Aircraft time: 53,701 hours, 16,151 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021120436823

## Discrepancy

CONT CAB TEMP LIGHT ILLUMINATED ON RECALL AFTER START. EXTINGUISHES ON MASTER CAUTION RESET TEMP CONTROL FUNCTIONS NORMAL. CHECKLIST COMPLETED. GROUNDED - YES. VERIFIED FAULT, ACCOMP PACK/ZONE TEMP CONT BITE TEST, #1 CONT NO FAULTS. #2 CONT SHOWS FLT DECK TRIM VALVE FAULT FROM PREV FLT. ACCOMP VERIFIED TEST, TEST PASS. CLEARED FAULT, ACCOMP BITE TEST AGAIN NO FAULTS. CLEANED ALL 3 TEMP SENSOR FILTERS. ACCOMP CABIN TEMP CONT & IND TEST, TEST PASS REF B737-800 AMM 21-61-00-700-807-002 & AMM 21-61-00-700-806-002.

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