AD/VAT/28 Amdt 7 - Wing Spar and Wing Spar Attachment and Fittings (Cth)

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES

Victa and A.E.S.L. Airtourer Series Aeroplanes

AD/VAT/28 Amdt 7

Wing Spar and Wing Spar Attachment and Fittings 7/92

Applicability: All models.

Requirement: l. Prepare the aircraft for inspection by either:

1. Removing the wing from the fuselage, removing the fuel tank access panel, and derivetting the wing bay skins adjacent to the tank bay, or

b. In accordance with a Scheme approved by the Authority provide permanent access to:

1. the wing to fuselage rear attachment fittings and lower fuselage longerons; and

ii. port and stbd wing bays adjacent to the fuel tank bay.

2. Inspect for wear, corrosion and cracking of:

1. the fuselage attachment bolts,

b. wing attachment fittings and bushes, and

c. lower fuselage longerons in the area of the wing rear attachment points.

3. Inspect the rear spar carry through for corrosion within the tank bay and immediately adjacent to the wing ribs in the adjacent wing bays, paying particular attention to associated hardware brackets and doublers. The inspection shall be carried out using access gained by:

1. removing the fuel tank to the forward end of the tank bay, and

b. the scheme approved for Requirement l.b. above.

4. Inspect the laminated tank underpan upper and lower surfaces for corrosion and core integrity. Discrete drain holes from the tank bay may need to be installed to prevent moisture accumulation in a replacement panel. Modify and/or repair in accordance with a scheme approved by the Authority.

5. All inspections shall be carried out using a strong light source and those inspections required for crack detection with a magnifying glass of l0x or greater.