Commonwealth legislation

AD/BELL 206/39 - Nut P/N 1022A14 Main Rotor Hub Latch Bolt and Blade Retention Bolt - Inspection

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This Act has been repealed and is no longer in force. It is retained for historical reference.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

3/10 complexity

What this does: This safety directive requires owners of early Bell 206 helicopters to inspect a specific nut that keeps the main rotor blades attached to the aircraft.

Who it affects: Anyone operating Bell 206 or Agusta-Bell 206 helicopters delivered before 20 November 1972.

What must be done:

Visual checks: Look at the nut (part number 1022A14) every day or overnight until the detailed inspection is completed.
Detailed inspection: Within 25 hours of flying time after mid-December 1972, conduct a magnetic particle inspection (a specialized test using magnets and iron powder to detect cracks) on this nut.

Why it matters: This nut is critical for holding the main rotor blades in place. Failure could cause the blades to detach in flight. The directive references manufacturer service bulletins (Bell SB 206-24 and Agusta SB BT206-56) that identified defects in this part.

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Current sections

Direct links to the current provisions in AD/BELL 206/39 - Nut P/N 1022A14 Main Rotor Hub Latch Bolt and Blade Retention Bolt - Inspection.

AD/BELL 206/39 - Nut P/N 1022A14 Main Rotor Hub Latch Bolt and Blade Retention Bolt - Inspection

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters

AD/BELL 206/39 Nut P/N 1022A14 Main Rotor Hub Latch Bolt

and Blade Retention Bolt - Inspection

Applicability: All models delivered prior to 20 November 1972. Document: Bell SB No. 206-24, or Agusta SB No. BT206-56.

1/73

Compliance: 1. Visual Inspection - At each daily or overnight inspection after 15 December 1972 until the magnetic particle inspection is performed.

Magnetic Particle Inspection - within 25 hours time in service after 15 December 1972.

Background: AD/Agusta 206/28 equivalent.

Source text

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