# SDR ASAA2023020941890

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 9, 2023
- Submitted: February 13, 2023
- Operation: Air carrier
- Aircraft: [N453AS](https://openairdocs.org/aircraft/N453AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36354
- Aircraft time: 34,230 hours, 10,766 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Actuator
- Part number: 676000141
- Part serial: 676000148696
- Condition: Faulty
- Location: Left Ram Air Inl
- Part time: 19,942 hours, 6,067 cycles
- Stage of operation: CR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023020941890

## Discrepancy

WHILE IN CRUISE LEFT PACK LIGHT ILLUMINATED - RAN CHECKLIST COULD NOT GET PACK LIGHT TO EXTINGUISH - CONTINUE FLIGHT WITH ISOLATION VALVE IN THE CLOSED POSITION. GROUNDED - YES. REMOVED AND REPLACED RAM AIR INLET ACTUATOR REF BOEING 737-900 AMM TASK 21-51-21-000/400-801.

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