# SDR UPS05445538

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 2, 2005
- Submitted: October 3, 2005
- Operation: Air carrier
- Aircraft: N682UP
- Make and model: Boeing 747121
- Aircraft serial: 20349
- Engine: Pwa JT9D7A
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Acm
- Part number: 7192389
- Part serial: J10250
- Condition: Inoperative
- Location: Nr 1
- Stage of operation: CL
- How discovered: O
- Nature of condition: E, B
- Precautionary procedure: J, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS05445538

## Discrepancy

NR 1 PACK ELEC SMOKE, VIBRATION AFTER TAKEOFF.  VIBRATION STOPPED WITH NR 1 PACK OFF.  REMOVED AND REPLACED NR 1 PACK AIR CYCLE MACHINE IAW AMM 21-51-04, RAN PACK ON GROUND FOR 2 HOURS, ALL OPERATIONS NORMAL.

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