# SDR 20001019SH029

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 28, 2000
- Submitted: October 19, 2000
- Operation: General aviation
- Aircraft: [N899CA](https://openairdocs.org/aircraft/N899CA), registered now
- Make and model: Beech B-99
- Registry model: [Beech B-99](https://openairdocs.org/model/beech-b-99) (OpenAirDocs)
- Aircraft serial: U104
- Engine: Pwa PT6A28
- System (JASC): [7230 · Turbine Engine Compressor Section](https://openairdocs.org/jasc/7230)
- Part: Case
- Part number: 3013340
- Part serial: 51031
- Condition: Cracked
- Location: Left Engine
- Part time: 34,511 hours
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/20001019SH029

## Discrepancy

DURING PROPELLER CHANGE ON LEFT ENGINE, A SERIES OF CRACKS WERE FOUND ON THE INBOARD EXHAUST FLANGE.  THE FLANGE IS A PART OF THE POWER SECTION, SO FIELD REPAIR WAS NOT POSSIBLE.  THE AFFECTED POWER SECTION WAS REPLACED WITH A SERVICEABLE POWER SECTION.  A POSSIBLE CAUSE FOR THE CRACKED FLANGE MAY HAVE BEEN THE RESULT OF OVERTORQUING THE HARDWARE ATTACHING THE EXHAUST STACKS TO THE FLANGE.  (X)

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