# SDR CALA2014011690170

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 16, 2014
- Submitted: January 16, 2014
- Operation: Air carrier
- Aircraft: [N122UA](https://openairdocs.org/aircraft/N122UA), registered now
- Make and model: Boeing 747422
- Aircraft serial: 29168
- Aircraft time: 59,868 hours, 6,953 cycles
- Engine: Pwa PW4056
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: A/C Pack
- Condition: Malfunctioned
- Location: Ac Bay
- Stage of operation: UK
- 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/CALA2014011690170

## Discrepancy

PACK 2 EICAS ADVISORY MESSAGE DISPLAYED.  NEITHER PTC IN CONTROL OF PACK 2 FOR 30 SECONDS OR PACK COMPONENT FAILURE OR OVERHEAT OR PACK TRIP DUE TO OVERHEAT OR OUT OF SEQUENCE.  HAD SYS FAULT LIGHT WITH PACK 2 EICAS MESSAGE.  PACK 2 RESET OK IAW QRH PROCEDURE.  RAN PACK ON GND, NO FAULTS NOTED.  RESET WAS ACCOMPLISHED BY CREW.

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