# SDR 96UAL900889

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 19, 1996
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N7294U
- Make and model: Boeing 727222
- Aircraft serial: 21572
- Engine: Pwa JT8D15
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Turbine Wheel
- Part number: 36069821
- Condition: Cracked
- Location: Apu
- Part time: 6,490 hours
- Stage of operation: NR
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/96UAL900889

## Discrepancy

LOUVER ASSEMBLY AND EXHAUST DUCTS DAMAGED WHEN TURBINE BROKE OFF FROM THE APU.  *S/D*  UNITED NO LONGER USES (P/N 3606982-1) AND NOW USES(P/N 3842072-2 OR - 3).  THE PROBLEM HAS BEEN ADDRESSED AND ALL MEANS OF INSPECTION AND REPAIR OF SADDLE CRACKS ARE IN PLACE.  THE 98CK APU BEING INSTALLED ON 727-222 AIRPLANES HAS TAILPIPES WITH CENTER BODIES INSTALLED TO PREVENT RELEASE OF SHRAPNEL IN CASE OF TURBINE WHEEL DISPERSEMENT.

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