# SDR ASAA2018092426205

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 23, 2018
- Submitted: September 24, 2018
- Operation: Air carrier
- Aircraft: [N474AS](https://openairdocs.org/aircraft/N474AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 40715
- Aircraft time: 13,066 hours, 4,350 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Module
- Part number: 6937324378
- Part serial: F07766
- Condition: Faulty
- Location: Cabin Temp
- Part time: 16,264 hours, 5,348 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018092426205

## Discrepancy

AIR TEMPERATURE INDICATOR READINGS ARE ERRATIC, OFTEN DISPLAYING EXCESSIVE TEMPS. GROUNDED - YES. REMOVED AND REPLACED TEMP CONTROL MODULE REF AMM 21-61-15-000-801 AND 21-61-15-400-801. TESTED REF AMM 21-61-00-700-806-002 AND 21-62-00-700-807-002. TESTS OK.

---
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.