# SDR ASAA2023070443861

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 4, 2023
- Submitted: July 5, 2023
- Operation: Air carrier
- Aircraft: [N535AS](https://openairdocs.org/aircraft/N535AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35200
- Aircraft time: 44,993 hours, 12,915 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/ASAA2023070443861

## Discrepancy

DURING MASTER CAUTION RECALL WE RECEIVED #2 PACK LIGHT AND FWD CAB/CONT CAB ZONE TEMP LIGHTS. ALL LIGHTS EXTINGUISH WHEN MASTER CAUTION SYSTEM IS RESET. GROUNDED - YES. ZONE TEMP CONTROLLER #2 HAD PACK/ZONE FAULT ILLUMINATED WITH #2 PACK LIGHT ILLUMINATED ON RECALL. ACCOMPLISHED BITE CK OF TEMP CONTROLLER #1 AND #2. NO FAULTS FOUND AND #2 PACK LIGHT DOES NOT ILLUMINATE ON RECALL REF B737-800 FIM 21-62 TASK 801.

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