# SDR 96UAL900536

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 15, 1996
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N7464U
- Make and model: Boeing 727222
- Aircraft serial: 21918
- Engine: Pwa JT8D15
- System (JASC): [5510 · Horizontal Stabilizer Structure](https://openairdocs.org/jasc/5510)
- Part: Bolt
- Part number: BACB30NE3H25
- Condition: Sheared
- Location: Lt Horz Stab
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/96UAL900536

## Discrepancy

DURING REPLACEMENT OF HORIZONTAL STAB PIVOT BEARINGS, FOUND ANTI-ROTATION PLATE CROSS BOLT SHEARED ON LT STAB FITTING. ANTI-ROTATION PLATES DISLODGED AND PIVOT BUSHING ROTATED IN HINGE FITTING BORE CREATING GOUGE IN OUTBOARD FACE OF LT PIVOT FITTING.  ROTATION OF BEARING CAUSED STEPPING OF I/B AND O/B FACES OF LT FITTING.  RT FITTING ALSO INCURRED MINOR STEPPING AROUND BORE UNDER BUSHING FLANGES.  CAUSED BY SHEARED ANTI-ROTATION PLATE CROSS BOLT.  THE GOUGE WAS REMOVED BY MEANS OF A SPOT FACE AND INSTALLATION OF A PLUG.  STEPPING AROUND BORE REMOVED BY INCREASING THE DEPTH OF THE ORIGINAL SPOT FACE.

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