Commonwealth legislation

AD/BO 105/9 - Main Rotor Blade Grip Bolts

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This airworthiness directive requires operators of Eurocopter BO 105 helicopters (except those fitted with the optional main rotor blade folding system) to inspect the main rotor blade grip bolts and follow the procedures in MBB Telex Alert Service Bulletin ASB‑BO 105‑10‑101 (6–8 May 1987). Any defective bolts found must be forwarded to the nearest Regional Office of the Department. It responds to fractures and cracks discovered under the bolt head that are suspected to result from faulty installation during manufacture.

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AD/BO 105/9 - Main Rotor Blade Grip Bolts

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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 Eurocopter BO 105 Series Helicopters

AD/BO 105/9 Main Rotor Blade Grip Bolts 7/87

Applicability: All models not fitted with the optional main rotor blade folding system. Requirement: Action in accordance with MBB Telex Alert Service Bulletin No. ASB-BO 105-10-

101 dated 6 May 1987, as amended by Revision 1 dated 8 May 1987, except that

defective bolts found as a result of the inspection should be forwarded to the nearest Regional Office of the Department.

Compliance: As detailed in the Requirement Document.

Background: Fractures and cracks have been found in the fillet radius under the head of the smaller diameter bolt which attaches the main rotor blade to the grip. Faulty installation during manufacture is the suspected cause.

Source text

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