# SDR ASAA2020020513051

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 1, 2020
- Submitted: February 6, 2020
- Operation: Air carrier
- Aircraft: [N435AS](https://openairdocs.org/aircraft/N435AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 43292
- Aircraft time: 24,972 hours, 8,014 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Acm
- Part number: 22064002
- Part serial: 10131
- Condition: Damaged
- Location: Right
- Part time: 24,984 hours, 8,018 cycles
- Stage of operation: NR
- 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/ASAA2020020513051

## Discrepancy

RIGHT PACK LIGHT ILLUMINATED FOR OVERHEAT CONDITION. GROUNDED - YES. RIGHT PACK TRIP DURING GROUND OPERATION. DETERMINED 390 DEGREE COMPRESSOR DISCHARGE SWITCH DETECTED OVERHEAT. WITH BOROSCOPE CONFIRMED AIR CYCLE MACHINE DAMAGE. REPLACED THE R/H A/C PACK ACM REF B737-900 AMM 21-51-04/401. LEAK AND OPS CHECK PASS.

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