Document ID: chunk:federal_register_of_legislation:F2018L01038:body:0:p2
Version: federal_register_of_legislation:F2018L01038
Segment Type: other
Provision Reference: 
Character Range: 2868–4233

hours of completion of any inspection required by Requirement 1.

                3. Replace any affected part before reaching the stated replacement life or calendar time limit in Table 3 Parts D and E, whichever occurs first.  For aircraft with greater than stated replacement life time in service, replace the affected part, within 100 hours time in service or 12 months from the date of issue of the SB, whichever occurs first.
             This AD commences on 8 June 2018.
Background:  Amendment 1 of this AD is issued to amend the replacement times as Service Bulletin GA8‑2017-174 Issue 2 changed the mandatory replacement times for part number GA8-570026-035 strut from 6000 hours time in service or 3 calendar years to 9000 hours time in service or 5 calendar years, whichever occurs first.
             A manufacturing quality escape has resulted in wing strut fittings in the effective serial number range to be manufactured with incorrect grain orientation.  The fatigue implications of the incorrect grain are not well understood.  Therefore, CASA has mandated a conservative factored fatigue life limit based on the known fleet data of the affected aircraft.  CASA will continue to gather data for the purposes of managing the fleet removal of these fittings from service.

Pieter van Dijk
Delegate of the Civil Aviation Safety Authority
29 May 2018