# SDR KCQA20211130

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 17, 2021
- Submitted: December 6, 2021
- Operation: Air carrier
- Aircraft: [N399CZ](https://openairdocs.org/aircraft/N399CZ), registered now
- Make and model: Beech 99
- Registry model: [Beech 99](https://openairdocs.org/model/beech-99) (OpenAirDocs)
- Aircraft serial: U91
- Aircraft time: 31,801 hours, 43,530 cycles
- Engine: Pwa PT6A28
- Engine time: 6,344 hours, 7,388 cycles
- Propeller: Hartzl HCB4TN3
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Part number: PT6A28
- Part serial: PCE51404
- Condition: Failed
- Location: Zone 600
- Part time: 6,344 hours, 7,388 cycles
- Component: Pt Blade, Pwc, NA
- Component part number: 3013102
- Stage of operation: TO
- How discovered: V
- Nature of condition: G, K
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/KCQA20211130

## Discrepancy

PILOT REPORTS "RH ENGINE SN PC-51404 FAILURE ON TAKEOFF ROLL. ALL ANNUNCIATORS WERE EXTINGUISHED AND ENGINE INSTRUMENTS IN THE GREEN. AS I BEGAN MY ROLLOUT AND BEFORE I COULD REACH THE DESIRED POWER SETTING, THERE WAS A POP FROM THE RH SIDE AND THE AIRPLANCE PULLED TO THE RIGHT. I IMMEDIATELY RETARTED THE THROTTLE AND CAME TO A STOP, WHERE I SAW THE RH WINDOW COVERED IN CLEARISH FLUID. ADVISED ATC OF ABORTED T/O AND THEY REQUESTED ME OFF THE ACTIVE RUNWAY AS AN AIRLINER WAS ON 3 MILE FINAL." MAINTENANCE, UPON INVESTIGATION OF AIRCRAFT IT WAS DETERMED THERE WAS A MISSING POWER TURBINE BLADE FROM FIR TREE, A FEW BROKEN BLADES (APPROX 1/2 MISSING) AND BENT BLADES ON THE PT DISK. IT IS SUSPECTED EITHER PT BLADE FAILURE OR GEAR REDUCTION FAILURE CAUSED THIS EVENT.

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