# SDR ASAA2018101526457

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 12, 2018
- Submitted: October 15, 2018
- Operation: Air carrier
- Aircraft: [N478AS](https://openairdocs.org/aircraft/N478AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44105
- Aircraft time: 13,090 hours, 4,412 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Actuator
- Part number: 676000141
- Part serial: 676000141357
- Condition: Inoperative
- Location: Ram Air Inlet
- Part time: 18,158 hours, 6,045 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018101526457

## Discrepancy

ON PDC WALKAROUND. FOUND LT RAM AIR DOOR NOT FULLY OPEN. GROUNDED - YES. ACCOMPLISHED PACK/ZONE TEMP CONTROLLER BITE, FOUND INLET AND EXIT SRADA FAULTS REF AMM 21-61-00. REMOVED AND REPLACED INLET AND EXHAUST RAM AIR ACTUATORS, INSTALLATION TEST OK, REF AMM 21-51-21 AND 21-51-27.

---
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.