Document ID: chunk:federal_register_of_legislation:F2018L01006:body:0:p2
Version: federal_register_of_legislation:F2018L01006
Segment Type: other
Provision Reference: 
Character Range: 2811–3515

to exceed 500 hours' time in service since the most recent inspection.

             This AD commences on 10 July 2018.
Background:  In May 1986, a Bell model 214ST helicopter experienced loss of collective control forcing a rapid, but successful ditching at sea. Subsequent investigation revealed that loss of collective control resulted from failure of the collective hub bearing retention nut lower locking plate which allowed the collective hub nut to unscrew. The actions specified in this Directive are intended to prevent failure of the collective hub locking plate and subsequent loss of control of the helicopter.

Pieter van Dijk
Delegate of the Civil Aviation Safety Authority

4 July 2018