Aviation safety issues and actions
Interim Recommendation issued to: Cessna Aircraft Company
|Date issued:||16 December 1999|
|Safety action status:|
|Background:||Why this Interim Recommendation was developed|
The Australian Transport Safety Bureau (formerly BASI)
recommends that Cessna Aircraft Corporation take appropriate action
to ensure that Cessna elevator trim-tab actuator component parts
affected by this safety deficiency are recoded so that they cannot
be purchased separately. In addition, it is recommended that Cessna
Aircraft Corporation review comparable designed trim-tab actuators
to ensure that they are not affected by this safety
As a result of the investigation into this occurrence, the Bureau simultaneously issues the following safety advisory notices:
The Civil Aviation Safety Authority should note the safety deficiency identified in this document and take appropriate action.
The US Federal Aviation Administration should note the safety deficiency identified in this document and take appropriate action.
The US National Transportation Safety Board is advised of the recommendation made to the aircraft manufacturer and safety advisory notices issued to the Civil Aviation Safety Authority and the US Federal Aviation Administration.
|Date issued:||13 March 2000|
|Response from:||Cessna Aircraft Company|
|Action status:||Closed - Accepted|
In reviewing your Interim Recommendation, Cessna Product
Engineering agrees with the stated recommendation to code the
replaceable components of the actuator assembly such that a matched
set of components, i.e., the male externally threaded component and
the female internally threaded component cannot be purchased
separately from the factory. After looking into the other aircraft
in the 300/400 Series, our engineers have begun to identify a
system in use on all models of Cessna aircraft and not just the
Model 402 for the functions of elevator trim tab, rudder rim tab,
as well as aileron trim tab. We believe that all actuators of this
type and variety should be coded together.