# SDR ASAA2018102026549

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 20, 2018
- Submitted: October 22, 2018
- Operation: Air carrier
- Aircraft: [N469AS](https://openairdocs.org/aircraft/N469AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41702
- Aircraft time: 16,794 hours, 5,596 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/ASAA2018102026549

## Discrepancy

CONT CAB ZONE TEMP LIGHT ILLUMINATED OR RECALL AND RESETS UPON MASTER CAUTION RESET. GROUNDED - YES. RELEASED PER MEL 21-21G CONTROL CABIN PRIMARY ZONE TEMP INOP. CHECKED AND PERFORMED AMM PACK ZONE TEMP BITE, SHOWED "FLT DECK TRIM VLV" RESET AND ALL FAULTS CLEARED, PERFORMED BITE ALL PASS GO.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.