COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Beagle B121 (Pup) Series Aeroplanes
AD/BEA 121/22
Amdt 1
Wing Spar Web 6/91 DM
Applicability: All models not having Modification No. BE. 214 embodied. Requirement: Action in accordance with Mandatory BAe SB B121/79 Revision 1.
Compliance: As specified in the Requirement Document but with a revised accomplishment date of 31 May 1991 for Australian registered aircraft which have exceeded 1300 hours time in service.
Background: Overseas, cracking has been found on wing spar webs immediately outboard of the root rib. They have occurred on mainplanes which do not have Modification No. BE. 214 embodied.
This amendment is necessary to introduce the accomplishment of the bulletin at 1300 flying hours in lieu of the present 2000 flying hours, since cracks have been found on an aircraft during preparation for accomplishment of the bulletin at 2000 hours.
Compliance date required by UK CAA extended by two months.