# SDR 2026FA0000286

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 22, 2026
- Submitted: April 22, 2026
- Operation: General aviation
- Aircraft: [N501LL](https://openairdocs.org/aircraft/N501LL), registered now
- Make and model: Cessna 525B
- Registry model: [Cessna 525B](https://openairdocs.org/model/cessna-525b) (OpenAirDocs)
- Aircraft serial: 525B0508
- Aircraft time: 1,154 hours, 865 cycles
- System (JASC): [5740 · Wing, Attach Fittings](https://openairdocs.org/jasc/5740)
- Part: Attach Plate
- Part number: 63213172
- Condition: Misaligned
- Part time: 865 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/2026FA0000286

## Discrepancy

8 EACH HOLES THROUGH THE YAW PLATE/WING ATTACH FITTING WERE NOT DRILLED PERPENDICULAR TO THE CONTOUR OF THE STRUCTURE CREATING A NONSHEAR CONDITION FOR THE FASTENER INSTALLATION. THESE HOLES WERE REQUIRED TO BE OVERSIZED BEYOND SRM LIMITATIONS TO CREATE A SHEAR CONDITION WITH A NEW YAW PLATE.  INFORMATION PROVIDED TO TEXTRON ENGINEERING: 8 EACH OVERSIZE HOLES IN UPPER AFT SPAR CAP AND SKIN UNDERNEATH AFT YAW PLATE MEASURING .262, .283, .296, .312, .286, .278, .278, .281 SHOULD
BE .246.

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