# SDR ASAA12511667

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 8, 2012
- Submitted: June 11, 2012
- Operation: Air carrier
- Aircraft: [N570AS](https://openairdocs.org/aircraft/N570AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35185
- Aircraft time: 20,487 hours, 6,165 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: A/C Pack
- Condition: Faulted
- Location: Left
- Stage of operation: TX
- 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/ASAA12511667

## Discrepancy

AFTER ENGINE START LEFT PACK LIGHT ILLUMINATED AND REMAINED ILLUMINATED AFTER QRH PROCEDURE FOLLOWED.  PERFORMED BIT CK NR 1 CONT SHOWED TCV FAULT.  CLEARED FAULT.  OPERATED BOTH PACKS NO DEFECTS NOTED DURING OPERATION OR ON MASTER CAUTION RECALL.

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