Document ID: chunk:federal_register_of_legislation:F2006B04980:body:0
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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
 SCHEDULE OF AIRWORTHINESS DIRECTIVES

 Cessna 170, 172, F172, FR172 and 175 Series Aeroplanes

AD/CESSNA 170/52 Muffler 3/86

 Applicability: Cessna aircraft S/N 172RG 1135 to 172RG 1187.

            Requirement: Inspect muffler core below each end plate attachment screw for damage in accordance with Cessna SB No SEB85-17.

 Compliance: Prior to issue of Certificate of Airworthiness.

            Background: A possibility exists that holes may have been drilled through the muffler allowing exhaust gases into the cabin during cabin heat operation.