Commonwealth legislation

AD/BELL 205/45 Amdt 4 - Main Rotor Yoke

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Commonwealth

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legislative instrument

Plain English Summary

4/10 complexity

This directive applies to Bell 205 helicopters with main rotor yoke P/N 204-011-102‑(all dash numbers). It requires operators to perform in‑place inspections following Bell Alert SB 205-90-36 and, where directed, remove the yoke for the detailed FAA AD 79-20-05 inspection. Amendment 4 adds a 1200‑hour/24‑month spindle inspection and allows earlier inspections to be credited when scheduling the next check. Operators/owners fund inspections and repairs; CASA requires compliance and enforcement, increasing inspection frequency and record‑keeping.

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Current sections

Direct links to the current provisions in AD/BELL 205/45 Amdt 4 - Main Rotor Yoke.

AD/BELL 205/45 Amdt 4 - Main Rotor Yoke

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Bell Helicopter Textron 205 Series Helicopters

AD/BELL 205/45

Amdt 4

Main Rotor Yoke 9/91

Applicability: All helicopters fitted with main rotor yoke P/N 204-011-102- (all dash numbers).

Requirement: 1. Inspect the main rotor yoke in-situ in accordance with the Accomplishment Instructions in Bell Alert SB No. 205-90-36 Revision A, dated 23 March 1990.

Remove the yoke assembly from the main rotor hub assembly and inspect the yoke in accordance with FAA AD 79-20-05, Amendment 39-3662.

Compliance: As detailed in the Requirement Documents.

Background: Amendment 3 implemented the additional inspections of ASB 205-87-28, which was issued as a result of fatigue cracks being found in service. It required that visual inspections of the main rotor yoke be performed daily and every 1200 hours/24 months. These are additional to the more detailed 2400 hourly inspection specified in FAA AD 79-20-05.

Amendment 4 specifies Bell Alert SB 205-90-36 which supersedes Alert SB

205-87-28, and adds an additional yoke spindle inspection at 1200 hours/24 month intervals. Inspections done to amendment 3 may be considered for the purposes of determining when next inspections are due.

Source text

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

1 AD/BELL 205/45 Amdt 4 - Main Rotor Yoke