# SDR WI5R2021042900001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 29, 2021
- Submitted: April 29, 2021
- Operation: General aviation
- Aircraft: [N32AC](https://openairdocs.org/aircraft/N32AC), registered now
- Make and model: Cessna 525B
- Registry model: [Cessna 525B](https://openairdocs.org/model/cessna-525b) (OpenAirDocs)
- Aircraft serial: 525B0257
- Engine: Wilint FJ443A
- Engine time: 3,330 hours, 2,619 cycles
- System (JASC): [7230 · Turbine Engine Compressor Section](https://openairdocs.org/jasc/7230)
- Part: Compressor
- Part number: 69026
- Part serial: HW26821
- Condition: Damaged
- Location: Engine
- Part time: 3,330 hours, 2,619 cycles
- 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/WI5R2021042900001

## Discrepancy

FJ44-3A ENGINE SERIAL NUMBER 141530, FROM AIRCRAFT 525B-0257 (N32AC), WAS RETURNED TO THE REPAIR STATION FOR UNSCHEDULED REPAIR.  ENGINE EXHIBITED A "HUM" NOISE DURING FLIGHT.  ENGINE OEM DIRECTED A BORESCOPE INSPECTION OF THE ENGINE'S COMPRESSOR SECTION, WHICH REPORTEDLY REVEALED DAMAGE TO HIGH PRESSURE (HP) COMPRESSOR BLADES AND 3RD-STAGE INTERMEDIATE PRESSURE COMPRESSOR (IPC) ROTOR BLADES. DISASSEMBLY OF THE ENGINE REVEALED ONE LIBERATED 3RD STAGE IPC ROTOR BLADE, WHICH APPEARS TO HAVE MOVED DOWNSTREAM, DAMAGING THE HPC ROTOR BLADES.

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