# SDR ASAA2021112436714

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 24, 2021
- Submitted: December 10, 2021
- Operation: Air carrier
- Aircraft: [N453AS](https://openairdocs.org/aircraft/N453AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36354
- Aircraft time: 29,597 hours, 9,422 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Actuator
- Part number: 676000141
- Part serial: 676000141297
- Condition: Faulty
- Location: Ram Air
- Stage of operation: TX
- 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/ASAA2021112436714

## Discrepancy

DURING MASTER CAUTION RECALL AFTER STARTING MOTORS, L PACK LIGHT ILLUMINATED. LIGHT EXTINGUISHED WITH MASTER CAUTION RESET. GROUNDED - YES. REMOVED AND REPLACED LH PACK RAM AIR EXHAUST ACTUATOR (SRADA) REF B737-900 AMM 21-51-27/401. BITE TEST ON THE LEFT AND RIGHT PACK/ZONE TEMPERATURE CONTROLLERS AND CHECK/ADJUSTMENT OF THE RAM AIR EXHAUST ACTUATOR ALL CHECK GOOD.

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