1. Inspect the inboard end of the left and right rear spars for security of the blind rivets, which attach the fuselage attach fitting to the rear spar and inboard rib. Inspect the radii of the rear spar upper and lower flanges for cracking. Inspect from the attachment fitting to a point 8-inches (200 mm) outboard. Inspect the aft flange of the inboard rib for cracking. If the aft flange of the inboard rib is cracked or the rivets show signs of working, repair in accordance with modification PAC/XL/0270. If the rear spar is cracked, before further flight, replace the rear spar. Note 1: Modification PAC/XL/0270 is a repair scheme for damaged spars and inboard ribs, and may be used as an alternative means of compliance to the spar replacement of this Directive. 2. On the left and right sides of the aircraft, remove the part number NAS1738E-6-6 blind rivets joining the rear spar part number 11-20031/32-1 and the aft end of the inboard rib, and replace with bolts or rivets as detailed in drawing No. 11-20035 and PACSB/XL/022. Note 2: Modification PAC/XL/0217, which may already be installed on some aircraft, addresses the installation of a packer on the rear wing pick-up using bolts instead of rivets, and is an alternative means of compliance to the Requirement 2 modification. Note 3: NZ CAA AD DCA/750XL/9 refers. |