Summary
We propose to supersede an existing airworthiness directive (AD) that applies to certain The Boeing Company Model 767-200 and -300 series airplanes. The existing AD requires replacement of the existing deactivation pin, aft cascade pin bushing, and pin insert on each thrust reverser half with new, improved components. Since we issued that AD, we received reports that certain airplanes require installation of a new bushing and deactivation pin with increased load carrying capability and all airplanes powered by Pratt & Whitney JT9D series engines require installation of a new bracket for stowing the deactivation pin. This proposed AD would add a dye penetrant inspection for cracking of the rivet holes of the bushing plate and repair or replacement, if necessary. For certain airplanes, this proposed AD would require replacing the existing bushing with a new bushing and deactivation pin; and installing a new or serviceable stowage bracket for the deactivation pins on all airplanes powered by Pratt & Whitney JT9D series engines. We are proposing this AD to prevent failure of the thrust reverser deactivation pins, which could fail to prevent a deployment of a deactivated thrust reverser in flight and consequent reduced controllability of the airplane.