# SDR WRNA200800004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 31, 2008
- Submitted: February 1, 2008
- Operation: Air carrier
- Aircraft: N508MC
- Make and model: Boeing 747230B
- Aircraft serial: 21644
- Aircraft time: 104,460 hours, 19,319 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Acm
- Part number: 7192389
- Part serial: 205788
- Condition: Activated
- Location: A/C Bay
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/WRNA200800004

## Discrepancy

DURING CRUISE, NR 3 PACK SHUTDOWN, LEAVING NO OPERATIONAL PACK, (NR 1 PACK WAS ON MEL, AND NR 2 PACK IS DEACTIVATED).  AIRCRAFT DIVERTED TO IAH AND MADE A SAFE LANDING.  REPLACED NR 3 ACM, NOTE:  ALSO REPLACED NR 1 ACM AND REMOVED FROM MEL.  A/C RETURNED TO SERVICE.

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