Commonwealth legislation

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

RepealedCTH

This Act has been repealed and is no longer in force. It is retained for historical reference.

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

This safety directive applies to Eurocopter AS 355 (Twin Ecureuil) helicopters fitted with tail rotor blades P/N 350A12-0030, 355A12-0031, 355A12-0040, or 355A12-0050. It requires operators to follow Eurocopter Service Bulletin No. 05-06 Revision 6 to detect and prevent blade-root cracking that can cause severe vibration and unsafe flight. Licensed maintenance personnel must perform the required work; the pilot may perform the specified daily check. The directive must be recorded in the Maintenance Release, carried on board, and noted in the Daily Inspection if the pilot did the check.

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AD/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.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.

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