1AD/HU 269/85 Amdt 2 - Tail Rotor Blade Abrasion Strip

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Schweizer (Hughes) 269 Series Helicopters

AD/HU 269/85

Amdt 2

Tail Rotor Blade Abrasion Strip 6/91 DM

Applicability: All models 269 series helicopters, certified in any category, equipped with 269A6035 series tail rotor blades manufactured before 15 September 1989.

Requirement: Action in accordance with the technical requirement of FAA AD 89-20-03 R1, which requires the following:

Modify the affected tail rotor blades with the following serial numbers (S/N) in accordance with the procedures detailed in Schweizer SIN N-183.3 Part III.

Blade S/N’s Affected

2. Modify all tail rotor blades, whether manufactured by Schweizer or Hughes, except those listed in Requirement 1, in accordance with procedures detailed in Schweizer SIN N-183.3 Part III.

3. Visually check the abrasion strip of these blades for any evidence of cracking or chipping along the entire abrasion strip/airfoil bond line and the blade tip.

(a) If, during the check required by Requirement 3, cracking or chipping is observed, inspect the bond line for bond separation using a 10 power or higher magnifying glass. If evidence of debonding along the abrasion strip/bond line or blade tip is detected, inspect the tail rotor blade using dye penetrant or equivalent inspection method and tap test prior to further flight in accordance with Schweizer SIN N-183.3 Part II.