# SDR ASAA2019032628789

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 26, 2019
- Submitted: March 29, 2019
- Operation: Air carrier
- Aircraft: [N431AS](https://openairdocs.org/aircraft/N431AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 43255
- Aircraft time: 21,605 hours, 7,099 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Warning System
- Condition: False Activation
- Location: Cockpit
- 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/ASAA2019032628789

## Discrepancy

FAULT LIGHT ON CONT CAB ZONE TEMP ON RECALL, RESETS WHEN MASTER CAUTION RESET PRESSED. GROUNDED - YES. ACCOMPLISHED INITIAL EVALUATION FOR FIM 21-62 TASK 842- CONTROL CABIN ZONE TEMP LIGHT ON AND STAYS OFF AFTER RESET. SYSTEM OPERATED NORMAL- NO ZONE TEMP LIGHT ILLUMINATION. ALSO ACCOMPLISHED PACK TEMP CONTROL BITE PROCEDURE FIM 21-62 TASK 801 WITH NO FAULTS. ETOPS GROUND VERIFICATION TEST PASS.

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