Commonwealth legislation

AD/DAUPHIN/34 Amdt 1 - Main Rotor Pitch Change Horn Bushes

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Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This airworthiness directive requires operators of Eurocopter SA 365 helicopters fitted with certain pitch change horns (P/N 365A31-1998-02 or 350A31-1877-02, serials below 100-000 and not marked “X”) to carry out inspections and corrective actions in accordance with Eurocopter service bulletins within specified flight‑hour limits. It responds to incorrectly tapered pitch change horn bushes that could allow a connecting bolt to fail, and imposes an operational compliance cost and maintenance action on affected operators.

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Current sections

Direct links to the current provisions in AD/DAUPHIN/34 Amdt 1 - Main Rotor Pitch Change Horn Bushes.

AD/DAUPHIN/34 Amdt 1 - Main Rotor Pitch Change Horn Bushes

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Eurocopter SA 360 and SA 365 (Dauphin) Series Helicopters

AD/DAUPHIN/34

Amdt 1

Main Rotor Pitch Change Horn Bushes 7/93

Applicability: All models 365 fitted with pitch change horns P/N 365A31-1998-02 or P/N 350A31- 1877-02 that are not marked with an “X” after the part number, and have a serial number less than 100-000.

Requirement: Action in accordance with Eurocopter SB 365C 65.31 R1 or SB 365N 62.11 R1 as applicable.

Note: DGAC ADs 92-181-132(B)R1 and 92-182-036(B)R1 refer.

Compliance: 1. Paragraph 1.C.1.: Within 50 hours time in service after 12 May 1993, and

If required, para 1.C.2.b.: within 300 hours time in service after 12 May 1993. The effective date of the initial issue of this Directive was 12 November 1992.

Background: The initial issue of the Directive was due to the discovery of pitch change horn bushes that were incorrectly tapered and could possibly cause failure of the pitch change horn to rod connecting bolt. Amendment 1 revises Applicability to include all pitch change horn serial numbers to 100-000.

Source text

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

1 AD/DAUPHIN/34 Amdt 1 - Main Rotor Pitch Change Horn Bushes