Document ID: chunk:federal_register_of_legislation:F2019L00326:body:0:p1
Version: federal_register_of_legislation:F2019L00326
Segment Type: other
Provision Reference: 
Character Range: 0–3320

AIRWORTHINESS DIRECTIVE
On the commencement date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below repeals Airworthiness Directive (AD) AD/P68/22 Amdt 4 and issues the following AD under subregulation 39.001 (1) of CASR and subsection 33 (3) of the Acts Interpretation Act 1901. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct an 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.

Vulcanair (Partenavia) P.68 Series Aeroplanes
AD/P68/22 Amdt 5  Wing Lower Front and Rear Spar Assemblies  6/2019

Applicability:  This AD applies to all Partenavia P68 series aircraft up to and including serial number 356, other than aircraft that CASA excluded from the operation of
                AD/P68/22 Amdt 4.
Requirement:       1. Inspect the wing front and rear spars for cracks in accordance with the Inspection Instructions in Partenavia Service Bulletin No. 65 Revision 3 (the SB), as in force at the commencement date of this AD.
                Note 1:  Aircraft on which the rear spar modification was accomplished before the issue of AD/P68/22 Amdt 3 require further repetitive inspections of the wing rear spar, unless the rear spar has been modified in accordance with AD/P68/22 Amdt 3, 4 or 5.
                   2. Modify the front and rear spar in accordance with the Repair Instructions in the SB and the following requirements:
                     (a) Modifications to front or rear spars, reinforcement plates and fasteners must be wet assembled with jointing compound or sealant (Hylomar SQ-32, PR1436G, PR1422 or similar) to prevent corrosion;
                     (b) The Avdel 5/32" diameter blind rivets specified on Partenavia rear spar drawing R-0081 cannot be locked without using a special pulling head which is not readily available in Australia.  Substitution of 3/16" diameter high strength structural rivets or close-tolerance steel bolts is required.  Some approved types are listed below.  Grip lengths are not specified because of variations between individual assemblies.  This list is not exhaustive, but alternative types will require approval from CASA under reg 39.004 of the CASR.
                           Rivets (Hole size .192"/.196")
                           Cherrymax CR3523P-6
                           Bulbed Cherrylock CR2539P-6
                           Bulbed Cherrylock CR2839CW-6
                           Cherrylock CR2663CW-6
                           Cherrylock CR2563-6
                           Bolts (Hole size .1895"/.1915")
                           NAS 1103
                           AN173
                           AN173C (however AN173 is preferred)
Compliance:        1. For 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'