# SDR ASAA2021080835670

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 8, 2021
- Submitted: August 11, 2021
- Operation: Air carrier
- Aircraft: [N569AS](https://openairdocs.org/aircraft/N569AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35184
- Aircraft time: 52,558 hours, 15,833 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Actuator
- Part number: 5416744
- Part serial: 494440
- Condition: Failed
- Location: Ram Air Inlet
- Part time: 86,537 hours, 44,069 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021080835670

## Discrepancy

LEFT PACK LIGHT ILLUMINATES ON RECALL. GROUNDED - YES. ACCOMPLISHED PACK/ZONE TEMPERATURE CONTROLLER BITE PER B737-800 AMM 21-61-00-700-806-002, FAILED FOR RAM AIR ACTUATOR ON M1442 CONTROLLER. REMOVED AND INSTALLED NEW RAM AIR INLET ACTUATOR ON LEFT SIDE PER AMM 21-51-21/401, BITE TEST PASSED. NO FAULTS FOUND. GROUND VERIFICATION SUCCESSFUL.

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