Document ID: chunk:federal_register_of_legislation:F2006B08804:body:0:p2
Version: federal_register_of_legislation:F2006B08804
Segment Type: other
Provision Reference: 
Character Range: 2725–5719

Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
 SCHEDULE OF AIRWORTHINESS DIRECTIVES

             3.    For aircraft which have been modified to incorporate wing skin doublers in accordance with SB 229, SB 263 and/or SRD SR03578003, inspect the wing using the visual procedure specified by SRD03578001 or SRD SR03578002 Revision A, whichever is applicable.

           Note 4: Transport Canada AD CF-92-15 refers.

           Compliance: For Requirement Para 1: Inspect before exceeding 500 hours time in service since last inspected in accordance with the previous issue of this AD, and thereafter at intervals not exceeding 500 hours time in service. In addition, inspect before further flight following flight in severe turbulence or following a heavy landing.

           For Requirement Para 2.a: Incorporate the access holes not later than the next inspection in accordance with Requirement Para 2.b.

           For Requirement Para 2.b: Inspect before exceeding 900 hours time in service since last inspected in accordance with the previous issue of this AD, or within 100 hours time in service after (date of issue), whichever occurs later, and thereafter at intervals not exceeding 900 hours time in service.

           For Requirement Para 2.c: Modify the wing before exceeding 900 hours time in service after 27 April 1995, or within 100 hours time in service after (date of issue), whichever occurs later.

           For Requirement Para 3: Inspect before exceeding 2000 hours time in service after 1 September 1969, or before exceeding 2000 hours time in service since last inspected in accordance with the previous issue of this AD, whichever occurs later, and thereafter at intervals not exceeding 2000 hours time in service.

           This Amendment becomes effective on 13 July 2000.

           Background: Previous issues of this AD promulgated inspection and modification in accordance with early issues of the reference documents. Amendment 3 introduced an additional modification to improve access for inspection; revised the inspection procedures; and required mandatory incorporation of the preventive doublers at the critical wing stations. These changes were prompted by an in-flight wing separation in Canada, and were intended to bring the Australian AD into line with recommendations from McDonnell Douglas and the FAA. FAA AD 92-06-15 refers.

               Subsequently the Authority was made aware that the requirement of Amdt 3 was ambiguous and that it provided a loophole whereby aircraft modified in accordance with SB 229, were not required to comply with Paragraphs 2.a, b or c. However, SB 229 specifies modification at WS 127.75 only, but not WS 94.25. This is contrary to the intent of the AD, which was to install the reinforcing doublers at both locations. Airworthiness inspectors have reported a number of aircraft in service in Australia which do not have the WS 94.25 modification and which, by virtue of the