COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Piper PA-34 (Seneca) Series Aeroplanes
AD/PA-34/15 Outer Wing Spars - Inspection 9/74
Applicability: All models PA34-200 with S/Nos. 34-7450001 to 34-7450205.
Requirement: 1. To detect improperly formed lightening holes in the outer wing spars, accomplish the following:
(a) Remove the inspection plate located adjacent to the aileron bellcrank and aft of the outboard fuel tank on the lower surface of the wing.
(b) Inspect both sides of LH and RH spar around the first lightening hole outboard of the fish mouth of the main spar splice for evidence of a die stamping mark approximately six by six inches square surrounding the lightening hole area.
(c) Inspect the lightening hole flange radius for cracks.
2. If square die stamping mark is evident on the aft side of spar only and there are no cracks in the lightening hole flange radii, no further action is required.
3. If square die stamping mark is evident on forward side of spar and/or if there are cracks in the lightening hole flange, replace the outboard spar with a serviceable spar of the same P/N or repair in accordance with a scheme approved by the Secretary.
Compliance: Within 10 hours time in service after 17 September 1974.