Document ID: chunk:federal_register_of_legislation:F2019L00326:body:0:p2
Version: federal_register_of_legislation:F2019L00326
Segment Type: other
Provision Reference: 
Character Range: 3062–5481

aircraft which have achieved 1800 hours' time in service - within 25 hours' time in service after 20 September 1984, and thereafter at intervals not exceeding 500 hours' time in service, or;
                   For aircraft which have not achieved 1800 hours' time in service - before achieving 1800 hours' time in service, and thereafter at intervals not exceeding 500 hours' time in service;
                Note 2:  An inspection carried out in accordance with AD/P68/22 Amdt 1, 2, 3 or 4 is taken to be an inspection for this AD.
                Note 3:  Inspection of the wing front spar is not required where the front spar has been modified in accordance with AD/P68/22 Amdt 1, 2, 3, 4 or 5.
                Note 4:  Inspection of the wing rear spar is not required where the rear spar has been modified in accordance with AD/P68/22 Amdt 3, 4 or 5.
                   2. If cracks are detected in a spar, before further flight.
                This AD commences on 22 March 2019.
Background:     A number of Australian aircraft have developed cracks in the front and rear lower spar cap angles.  The critical area in each case is the radius run-out where the horizontal flange abruptly tapers down near the wing-fuselage attachment.  As a result of these reports, the manufacturer issued SB No. 65, which detailed an improved inspection method and a repair for the front spar only.  An AD was issued to incorporate SB No. 65 Revision 1, which included the rear spar.  However, some variations to the rear spar repair scheme were, and still are, required.
                AD/P68/22 Amdt 4 introduced SB No. 65 Revision 2, which contained a re-designed front spar reinforcement.  However, the previous modification was still considered to be satisfactory.  Later serial number aircraft were also exempt from the requirements of AD/P68/22 Amdt 4.
                This AD introduces SB No. 65 Revision 3, which contains no further technical changes but extends the applicability to aircraft with serial numbers up to 356 in accordance with the Partenavia Service Bulletin 65 Revision 3.  Additionally, the applicability section has been modified to enable exclusions issued by CASA from the operation of AD/P68/22 Amdt 4 to be treated as exclusions from this AD.  The AD requirement and compliance sections have been modified for clarity.

Pieter van Dijk
Delegate of the Civil Aviation Safety Authority
18 March 2019