Commonwealth legislation

AD/AS 355/41 Amdt 1 - Main Rotor Pitch Change Horn Bushes

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Plain English Summary

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This airworthiness directive requires operators of Eurocopter AS355 E/F/F1/F2/N helicopters fitted with pitch change horns P/N 350A31-1877-02 (serials below 100‑000 and not marked ‘X’) to follow Eurocopter Service Bulletin AS355 62.24 R1: inspect and, if necessary, replace main rotor pitch change horn bushes within prescribed flight‑hour limits to avoid possible bolt failure. Affected parties (aircraft owners/operators and maintenance providers) pay for inspections, any replacements and associated downtime; the regulator sets the deadlines and enforces compliance.

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AD/AS 355/41 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 AS 355 (Twin Ecureuil) Series Helicopters

AD/AS 355/41

Amdt 1

Main Rotor Pitch Change Horn Bushes 7/93

Applicability: Models E, F, F1, F2, and N fitted with pitch change horns 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 AS355 62.24 R1.

Note: DGAC AD 92-183-046(B)R1 refers.

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

If required, paragraph 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/AS 355/41 Amdt 1 - Main Rotor Pitch Change Horn Bushes