# SDR ASAA2018021023472

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 10, 2018
- Submitted: February 12, 2018
- Operation: Air carrier
- Aircraft: [N587AS](https://openairdocs.org/aircraft/N587AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35684
- Aircraft time: 39,398 hours, 11,486 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Control Valve
- Part number: 3989083
- Part serial: 11324
- Condition: Faulted
- Location: Lt A/C Pack
- Part time: 33,905 hours, 10,025 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018021023472

## Discrepancy

CONTROL CABIN ZONE TEMP LIGHT ON CLIMB OUT. RESET WITH MASTER CAUTION RECALL.  ACFT GROUNDED.  REPLACED CONTROL TRIM VALVE IAW AMM 21-61-21-000-801, AND 21-61-21-400-801, OPS CHECKED GOOD.

---
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.