# SDR ASAA2017021819848

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 18, 2017
- Submitted: February 21, 2017
- Operation: Air carrier
- Aircraft: [N568AS](https://openairdocs.org/aircraft/N568AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35183
- Aircraft time: 38,213 hours, 11,697 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Acm
- Part number: 22064002
- Part serial: 4594
- Condition: Failed
- Location: Left
- Part time: 37,776 hours, 11,382 cycles
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017021819848

## Discrepancy

LEFT PACK LIGHT ILLUMINATED.  ACFT GROUNDED. AFTER 3 RESETS, ZONE TEMP CONTROLLER NR 1 SHOWS PACK TEMP CONTROL VALVE IAW FIM 21-61 TASK 801. REPLACED THE LEFT PACK TEMP CONTROL VALVE IAW AMM TASK 21-51-10-000-801, & 21-51-10-400-801. ACCOMPLISHED BITE- PASSED. OPERATED PACK FOR APPROX 5 MINUTES. PACK LIGHT ILLUMINATED. BITE CHECK SHOWS TCV FAIL. PERFORMED BITE CHECK WITH NO FAULTS NOTED IAW FIM 21-61 TASK 801. OPERATED PACK. ACM DID NOT SPOOL UP AND PACK ONLY CREATED HOT AIR. SUSPECT ACM FAILURE.  REMOVED AND REPLACED THE LT ACM IAW AMM 21-51-04-401-002. OPS CHECKED GOOD.  RAN THE LT PACK ON HOT AND COLD CYCLES FOR 5 MINUTES EACH, NO DEFECTS NOTED.   FOUND REMOVED ACM SHAFT WOULD NOT SPIN. LEAK CHECKED GOOD.

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