# SDR ASAA2019112191383

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 19, 2019
- Submitted: November 22, 2019
- Operation: Air carrier
- Aircraft: [N434AS](https://openairdocs.org/aircraft/N434AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 61620
- Aircraft time: 14,564 hours, 4,637 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Warning Light
- Condition: False Activation
- Location: Cockpit Temp
- Stage of operation: NR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019112191383

## Discrepancy

ON RECALL, CONT CAB ZONE TEMP ANNUNCIATOR ILLUMINATED. EXTINGUISHES WITH MASTER CAUTION RESET. GROUNDED - YES. SUPPLIED CONDITIONED AIR WITH BOTH PACKS, CONT CABIN ZONE TEMP LIGHT REMAINS OFF, LIGHT DOES NOT ILLUMINATE WITH MASTER CAUTION RECALL, REF B737-900 FIM 21-62 TASK 842. ACCOMPLISHED LEFT AND RIGHT PFTC BITE, NO FAULTS NOTED, REF FIM 21-62 TASK 801. ETOPS SIGNIFICANT SYSTEM GROUND VERIFICATION SUCCESSFUL.

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