# SDR ASAA2023021842047

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 18, 2023
- Submitted: February 24, 2023
- Operation: Air carrier
- Aircraft: [N453AS](https://openairdocs.org/aircraft/N453AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36354
- Aircraft time: 34,308 hours, 10,790 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Acm
- Part number: 22064002
- Part serial: 5234
- Condition: Seized
- Location: Left Ecs Bay
- Part time: 55,139 hours, 16,730 cycles
- 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/ASAA2023021842047

## Discrepancy

LEFT PACK CAUTION LIGHT ILLUMINATED WHILE AT GATE. DUCT TEMPERATURE REACHED 40C. ACCOMPLISHED QRC. TRIP RESET ACCOMPLISHED. PACK LIGHT REMAINED ILLUMINATED . GROUNDED - YES. FOUND L/H ACM SEIZED/DAMAGED COLING FAN. REMOVED L/H AIR CYCLE MACHINE REF B737-900 AMM 21-51-04. REPLACED LEFT AFT SRADA ACTUATOR. REF AMM 21-51-27. OPS & LEAK CHECK GOOD.

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