# SDR 98UAL900166

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 27, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N7277U
- Make and model: Boeing 727222
- Aircraft serial: 21424
- Engine: Pwa JT8D15
- System (JASC): [7230 · Turbine Engine Compressor Section](https://openairdocs.org/jasc/7230)
- Part: Compressor
- Condition: Failed
- Location: Nr 3 Engine
- Component: Pratt & Whit, 782276
- Stage of operation: TO
- Nature of condition: J
- Precautionary procedure: A, E, J
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/98UAL900166

## Discrepancy

JUST AFTER ROTATION FLIGHT ENCOUNTERED LOUD BANG AND VIBRATION FROM THE REAR OF AIRCRAFT.  SHUT DOWN NR 3 ENGINE.  DUMPED FUEL AND RETURNED TO MIA.  *S/D*  ENGINE DISASSEMBLY REVEALED FIVE SECOND STAGE NOZZLE GUIDE VANES BURNED THROUGH AND SUBSEQUENT DOWNSTREAM DAMAGE.  THE FAILURE WAS CONTAINED.  THE T2 NGV BURN THROUGH WAS CAUSED BY A LEAKING NR 8 FUEL NOZZLE WHICH WAS SEVERELY DETERIORATED.  THE NOZZLE PASSED A SUBSEQUENT FLOW CHECK.  THE NOZZLE IS UNDER INVESTIGATION TO DETERMINE THE ROOT CAUSE OF THE LEAK.

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