# SDR 2026F00012

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 12, 2026
- Submitted: February 13, 2026
- Operation: General aviation
- Aircraft: [N525CR](https://openairdocs.org/aircraft/N525CR), registered now
- Make and model: Cessna 525B
- Registry model: [Cessna 525B](https://openairdocs.org/model/cessna-525b) (OpenAirDocs)
- Aircraft serial: 0238
- Aircraft time: 8,378 hours, 8,225 cycles
- Engine: Wilint FJ443A
- Engine time: 8,225 hours, 6,109 cycles
- System (JASC): [7250 · Turbine Section](https://openairdocs.org/jasc/7250)
- Part: Turbine Blades
- Part number: 78282
- Condition: Damaged
- Location: Engine
- Part time: 6,629 hours, 5,131 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: B, J
- Precautionary procedure: E, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2026F00012

## Discrepancy

THE FLIGHT-CREW HAD NOTICED SMOKE IN THE CABIN, WHICH THEY ISOLATED TO THE NR 1 ENGINE, PROMPTING IN-FLIGHT SHUTDOWN OF ENGINE.  AIRCRAFT LANDED WITHOUT INCIDENT.  POST-FLIGHT INSPECTION REVEALED NO OIL VISIBLE IN THE NR 1 ENGINE’S OIL LEVEL SIGHT-GLASS.  SUPPORT RECOMMENDED A BORESCOPE INSP & INSP OF MAGNETIC CHIP COLLECTORS, WAS PERFORMED.  CHIP COLLECTORS EXHIBITED METALLIC DEBRIS & BORESCOPE INSP REVEALED EVIDENCE OF ENG OIL IN THE CORE OF THE ENGINE.  BASED ON THESE FINDINGS, SUPPORT DIRECTED REMOVAL OF THE ENGINE FOR SHIPMENT TO REPAIR STATION FOR INVESTIGATION & REPAIR.  ENGINE DISASSEMBLY REVEALED TWO PARTIALLY-RELEASED HIGH PRESSURE TURBINE (HPT) BLADE TIPS & THE NR 3 BEARING EXHIBITED DAMAGE.  ASSOCIATED STATIC ENGINE COMPONENTS EXHIBITED SECONDARY DAMAGE FROM THE HPT BLADE & NR 3 BEARING ANOMALIES.  DAMAGE TO THE NR 3 BEARING IS DEEMED TO BE CAUSED BY N2 SPOOL IMBALANCE RESULTANT FROM THE HPT BLADE ANOMALIES.

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