# SDR ASAA2019112621422

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 22, 2019
- Submitted: November 27, 2019
- Operation: Air carrier
- Aircraft: [N407AS](https://openairdocs.org/aircraft/N407AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41731
- Aircraft time: 27,974 hours, 8,905 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Actuator
- Part number: 5416744
- Part serial: 8559
- Condition: Inoperative
- Location: Rt Ram Air Inlet
- Part time: 61,030 hours, 28,674 cycles
- Stage of operation: CR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019112621422

## Discrepancy

INFLIGHT RIGHT PACK LIGHT ILLUMINATED AND WAS RESET WITH MASTER CAUTION RESET BUTTON. PACKS OPERATE NORMALLY. GROUNDED - YES. ACCOMPLISHED PACK TEMP CONTROLLER BITE TEST VERIFIED # 2 CONTROLLER SHOWED RAM AIR ACTUATOR FAULT. REMOVED AND REPLACED RIGHT PACK RAM AIR ACTUATOR REF B737-900 AMM 21-51-21-000-801 AND AMM 21-51-21-400-801. GROUND VERIFICATION CK GOOD. REACCOMPLISHED BITE CK NO FAULTS NOTED REF B737-900 FIM 21-62 TASK 801. THIS CLEARS MEL 21-32B.

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