1AD/AS 355/7 Amdt 5 - Tail Rotor Blade Spar

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Eurocopter AS 355 (Twin Ecureuil) Series Helicopters

AD/AS 355/7

Amdt 5

Tail Rotor Blade Spar 5/94

Applicability: All models fitted with all dash numbers of tail rotor blades P/N 350A12-0030, 355A12-0031, 355A12-0040, and 355A12-0050.

Requirement: Action in accordance with Eurocopter AS 355 SB No. 05-06 Revision 6.

Note: DGAC AD 84-045-022(B)R4 refers.

Compliance: As specified in the Requirement Document.

This Directive must be entered onto the Maintenance Release as maintenance required. Paragraph C1 of the Requirement Document may be performed by the pilot in command, in which case a certification is to be made by entering AD/AS 355/7 Amdt 5 against the Daily Inspection certification on the Maintenance Release. A copy of this Directive and of the Requirement Document must be carried in the aircraft.

Background: This Directive was initially raised following reports of cracking, leading to severe unbalance at the blade root on the tail rotor spar. Amendments 1 to 3 extended both the compliance times and the applicable part numbers. Amendment 4 further extended the part number applicability.

Amendment 5 is issued in response to revision 6 of the Requirement Document which clarifies compliance conditions.