Reference

Downlock Pins

• Can I buy the parts separately?

  Yes. McFarlane offers MC1290009-2 downlock pins, MC1290009-3 drill tool, or NG-KT-155 complete service kit.

• Do I need the drill tool to install the downlock pins?

  The drill tool is recommended to support proper alignment during installation, consistent with the Cessna service process. It is not required but can help reduce the risk of misalignment during drilling.

• Is NG-KT-155 a replacement for the Cessna service kit?

  The NG-KT-155 service kit is a fully compatible alternative to Cessna service kit SK210-155. It supports the same maintenance action outlined in SEB95-20 and provides improved availability and value. The kit itself is non-approved, though FAA-PMA approved components are included.

• What problem do worn downlock pins cause?

  Worn downlock pins in the landing gear downlock actuator can reduce proper over-center locking. When this occurs, the downlock hook may not fully engage, which can allow the landing gear to unlock under load during taxi, rollout, or landing. This can cause safety concerns or costly damage to the aircraft.