There are over 500 of the original-design universals in the field, and the service bulletin
calls for inspecting and lubricating the part every 25 hours.
You would think there is a service bulletin
or even an AD for this, but there isn't.
Once the fix is certified and the service bulletin
is approved, the FAA is likely to revise that airworthiness directive.
In fact, a major power steering pump rebuilder recently issued a service bulletin
warning shop owners that using the wrong fluid can destroy a freshly rebuilt pump in as little as 20 minutes.
As we go to press in early August, Lycoming, field shops and owners were struggling to clarify a service bulletin
that requires inspection and possible replacement of connecting rod bushings in hundreds of Lycoming engines.
The engineering services includes Service Bulletin
and Airworthiness Directive monitoring, along with development and tracking of required maintenance planning data, and even parts and components adapted to specific customer needs.
According to a dealer service bulletin
published by CivicX.
1123B gives the service limits to the steering arm's center pivot bushings and center pivot sleeve.
Jet Aviation has acquired the necessary tools and training at its Maintenance Center in Basel to perform the Pratt & Whitney (PW) Service Bulletin
(SB) calling for replacement of the left and right bevel gear oil shield on PW307A engines.