# SDR 2014FA0000415

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 17, 2014
- Submitted: July 3, 2014
- Operation: General aviation
- Aircraft: [N8323D](https://openairdocs.org/aircraft/N8323D), registered now
- Make and model: Beech J35
- Registry model: [Beech J35](https://openairdocs.org/model/beech-j35) (OpenAirDocs)
- Aircraft serial: D5405
- Aircraft time: 4,806 hours
- Engine: Cont IO470C
- Engine time: 481 hours
- System (JASC): [7603 · Power Lever](https://openairdocs.org/jasc/7603)
- Part: Lock Nut
- Condition: Backed Out
- Location: Throttle
- Part time: 481 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2014FA0000415

## Discrepancy

WHEN ATTEMPTING TO TRANSITION FROM CRUISE TO DESCENT, THE WIDE-OPEN THROTTLE WAS UNMOVABLE.  THIS WAS DUE TO THE FACT THE THROTTLE LEVER WITH ITS FEMALE 45º X 1/16" LONG X 0.015" HIGH SPLINE WAS ALLOWED TO SEPARATE FROM ITS MALE COUNTERPART ON THE THROTTLE SHAFT BECAUSE THE SINGLE SPECIAL LOCKNUT LOOSENED AND BACKED OFF.  THERE IS NO WAY TO SAFETY WIRE A NUT IN THIS APPLICATION, AND A CASTLENUT WITH COTTER PIN IS NOT APPLICABLE DUE TO THE SMALLNESS OF THE THROTTLE SHAFT TO ACCEPT A DRILLED HOLE.  CRITICAL SERVICE BULLETIN CSB08-3C REQUIRES THIS NUT TO BE TORQUED TO 100 IN.  THIS IS NOT NEARLY ENOUGH.  IT SHOULD BE TORQUED TO AT LEAST 165 IN#.  THEN A PAL NUT SHOULD BE INSTALLED AGAINST THE LOCKNUT AND TORQUE PUTTY APPLIED.

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