# SDR ASAA2021112336691

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 23, 2021
- Submitted: November 24, 2021
- Operation: Air carrier
- Aircraft: [N532AS](https://openairdocs.org/aircraft/N532AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 36346
- Aircraft time: 41,456 hours, 12,230 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: IN
- 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/ASAA2021112336691

## Discrepancy

CONT CAB ZONE TEMP MASTER CAUTION LIGHT ON RECALL. GROUNDED - YES. PERFORMED PZTC BITE IAW B737-800 FIM 21-62 TASK 801. FLT DECK TRIM VALVE RED LIGHT ON BIT, CLEARED GREEN ON VERIFY. NO FAULTS REMAIN ON MASTER RECALL. CLEANED FLT DECK SENSOR IAW B737-800 AMM 21-61-10-100-801. RAN BOTH PACKS UP IAW AMM 21-61-00-700-807-002 FOR 15-20 MINS, NO FAULTS OR LIGHTS ILLUMINATED.

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