# SDR E81R2015021640672

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 16, 2015
- Submitted: February 24, 2015
- Operation: General aviation
- Filed by: [Chronos Aviation, LLC., repair station E81R759X](https://openairdocs.org/faa-repair-station/E81R759X/chronos-aviation-llc.md) (OpenAirDocs)
- Aircraft: [N48AZ](https://openairdocs.org/aircraft/N48AZ), registered now
- Make and model: Beech C90
- Registry model: [Beech C90](https://openairdocs.org/model/beech-c90) (OpenAirDocs)
- Aircraft serial: LJ859
- Aircraft time: 5,019 hours, 9,646 cycles
- System (JASC): [5710 · Wing Main, Frame Structure](https://openairdocs.org/jasc/5710)
- Part: Bolt
- Part number: 817861020
- Condition: Cracked
- Location: Zone 600
- Part time: 961 hours
- Stage of operation: IN
- How discovered: D
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/E81R2015021640672

## Discrepancy

DURING SCHEDULED INSPECTION OF THE WING STRUCTURE IAW THE SRM 57-13-01, LIQUID PENETRANT INSPECTION OF THE RT OTBD WING LOWER AFT ATTACH BOLT SHOWED A POSSIBLE CRACK INDICATION AROUND THE HEAD AREA.  AVAILABLE RECORDS SHOW OTBD WING ATTACH BOLTS WERE INSTALLED NEW ON 10/09/2008, AT 4058.6 HRS. TTAF, 960.6 HRS. PREVIOUSLY.

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