# SDR ASAA2021100336202

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 3, 2021
- Submitted: October 7, 2021
- Operation: Air carrier
- Aircraft: [N448AS](https://openairdocs.org/aircraft/N448AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36356
- Aircraft time: 19,362 hours, 6,173 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: None
- Part number: 676000141
- Part serial: 676000146822
- Condition: None
- Location: L Ram Air Exit
- Part time: 16,908 hours, 5,626 cycles
- Stage of operation: NR
- 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/ASAA2021100336202

## Discrepancy

LEFT PACK LIGHT ILLUMINATED ON RECALL. EXTINGUISHED WHEN MASTER CAUTION RESET BUTTON WAS PUSHED. GROUNDED - YES. PERFORMED PACK FLOW TEMPERATURE CONTROLLER BITE PER B737-900 AMM 21-61-00-740-801-002 FAULTS EXIT SRADA ACTUATOR. REMOVED LH RAM AIR EXHAUST ACTUATOR PER AMM 21-51-27-000-801. INSTALLED RAM AIR EXHAUST ACTUATOR PER AMM 21-51-27-400-801. PERFORMED INSTALLATION TEST PER SAME, INSTALLATION TEST PASSED.

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