# SDR ASAA2019010127646

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 1, 2019
- Submitted: January 8, 2019
- Operation: Air carrier
- Aircraft: [N558AS](https://openairdocs.org/aircraft/N558AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35177
- Aircraft time: 47,580 hours, 14,060 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Actuator
- Condition: Faulted
- Location: Ram Air
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019010127646

## Discrepancy

LEFT PACK LIGHT ON, ON RECALL. GROUNDED - YES. ON DEFERRAL. INITIALLY ACCOMPLISHED PACK CONTROL BITE TEST PER FIM 21-62 TASK 801. FOUND LT RAM AIR ACTUATOR FAULTED. REMOVED & REPLACED LT RAM AIR ACTUATOR PER AMM 21-51-21. OPS CHECK GOOD. DUE TO HISTORY ALSO REMOVED AND REPLACED PRECAUTIONARY THE LT TEMP CONTROL VALVE REF AMM 21-51-10. OPS AND LEAK CHECK GOOD. RE-ACCOMPLISHED PACK CONTROL BITE TEST AND FOUND NO FAULTS AT THIS TIME.

---
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.