COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Cessna 180, 182 and Wren 460 Series Aeroplanes
AD/CESSNA 180/74 Instrument Panel Light Dimming Rheostat 3/94
Cessna Model 180H and 180J aircraft with serial numbers 18051446 through 18052384 inclusive.
Unless previously accomplished, replace the existing instrument panel light dimming rheostat (some installations will also require the fitting of a doubler) in accordance with the Accomplishment Instructions of Cessna Single Engine Service Bulletin SEB92-33 Revision 2 dated 10 September 1993.
FAA AD 93-24-15 Amdt 39-8764 refers.
Prior to 3 October 1994.
The FAA has advised of a report of an inflight fire in a Cessna Model 172.
The fire was caused by a short in the electrical wiring controlled by the instrument panel light dimming rheostat. This Directive requires the rheostat to be replaced with an improved version, which is both current-limiting and heat-protected, thus decreasing the probability of an inflight fire being caused by a defective rheostat.