# SDR 2000UALA00243

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 11, 2000
- Submitted: October 4, 2000
- Operation: Air carrier
- Aircraft: N179UA
- Make and model: Boeing 747422
- Aircraft serial: 25158
- Engine: Pwa PW4056
- System (JASC): [3211 · Main Landing Gear Attach Section](https://openairdocs.org/jasc/3211)
- Part: Bolt
- Part number: 69B136821
- Condition: Cracked
- Location: Trunnion
- Part time: 82,780 hours, 19,723 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/2000UALA00243

## Discrepancy

ON WALKAROUND, FOUND 1.125 INCH DIA H-11 BOLT BROKEN AT STATION 1480 BODY LANDING GEAR INBOARD TRUNNION SUPPORT FITTING.  *S/D*  CAUSE WAS DUE TO STRESS CORROSION.  REPLACED BOLT (69B13682-1) AND PERFORMED ULTRASONIC INSPECTED ADJACENT (2) BOLTS COMMON TO FITTING FOR CRACKS, NONE FOUND.

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