For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.001(1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.
Rolls Royce Turbine Engines - RB211 Series
Air - IP Cabin Air Offtake Ducting
RB211-524G and -524H engines installed in Boeing 747 and 767 as specified in the requirement document.
Perform an inspection and torque check in accordance with Rolls-Royce Service Bulletin No. 75-9159 Revision 5 dated January 27, 2003 or later approved revision.
Note: UK CAA AD G-029-04-90 refers.
Periodically as specified in the requirement document.
This Airworthiness Directive becomes effective on 30 April 2012.
CASA has reviewed state-of-design ADs applicable to RB211 engines and decided G-029-04-90 should be explicitly mandated for Australian aircraft.
Delegate of the Civil Aviation Safety Authority
16 April 2012