# SDR ASAA2023012391581

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 19, 2023
- Submitted: February 1, 2023
- Operation: Air carrier
- Aircraft: [N513AS](https://openairdocs.org/aircraft/N513AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35192
- Aircraft time: 50,558 hours, 15,139 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Modulating Valve
- Part number: 3989083
- Part serial: 2512
- Condition: Faulted
- Location: Lt Acm
- Part time: 80,923 hours, 36,205 cycles
- Stage of operation: TX
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023012391581

## Discrepancy

ZONE TEMP CONT CABIN ILLUMINATED AFTER START ON RECALL. GROUNDED - YES. REMOVED AND REPLACED TCV (V143) REF B737-800 AMM 21-61-21. ORIG SUB DATE:  1/23/2023

---
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.