# SDR 8LFA2026030950001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 5, 2026
- Submitted: March 10, 2026
- Operation: Air carrier
- Aircraft: [N660LF](https://openairdocs.org/aircraft/N660LF), registered now
- Make and model: Pilats PC1247E
- Aircraft serial: 1347
- Aircraft time: 8,366 hours, 10,616 cycles
- System (JASC): [3210 · Main Landing Gear](https://openairdocs.org/jasc/3210)
- Part: Bolt
- Part number: AN427
- Condition: Broken
- Location: Zone 700
- Part time: 8,366 hours, 589 cycles
- Component: Landing Gear, Pilats
- Component part number: 5321012051
- Stage of operation: LD
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/8LFA2026030950001

## Discrepancy

UPON LANDING WOW CAS MESSAGE ILLUMINATED.  DURING INVESTIGATION IT WAS FOUND THE BOLT (AN4-27) THAT SECURES THE TRAILING LINK ASSEMBLY (PIVOT PIN 523.10.12.210) HAD SHEARED.  THE SHEARED AN4-27 BOLT ALLOWED THE PIN TO ROTATE FREELY IN THE TRAILING LINK, THIS CAUSED THE WOW PROXIMETY SWITCH TO MALFUNCTION DUE TO THE PROXIMITY TARGET BEING MOVED FROM SET POSITION.

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