# SDR 96UAL900599

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 6, 1996
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N516UA
- Make and model: Boeing 757222
- Aircraft serial: 24860
- Engine: Pwa PW2037
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Fan
- Part number: 36144161
- Condition: Failed
- Location: Cockpit
- Stage of operation: UK
- Nature of condition: B
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/96UAL900599

## Discrepancy

LIGHT SMOKE IN COCKPIT WITH PACS ON AND APU RUNNING.  *S/D*  APU WAS REPLACED DUE TO MASSIVE COOLING FAN FAILURE.  FAN ROTOR FAILED, HOUSING WAS BROKEN AND MINOR FOD TO BOTH COMPRESSORS.  FAILED APU REPLACED WITH NEW UNIT, OPERATION CHECKS NORMAL.

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