Commonwealth legislation

AD/GBK 117/15 - Main Rotor Blades with Bolted Lead Inner Weights

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Commonwealth

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legislative instrument

Plain English Summary

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This Airworthiness Directive requires operators of Eurocopter BK117 A‑1 through C‑1 helicopters to follow Eurocopter Deutschland Alert Service Bulletin ASB‑MBB‑BK117‑10‑125 (or a later EASA‑approved revision) to address a risk from bolted lead inner weights on main rotor blades. It introduces a life limit for blades with those weights after an in‑flight vibration incident caused a weight to come loose.

Operators must perform a logbook check starting 20 April 2005 and carry out the inspections and corrective actions in the service bulletin; operators bear the inspection and replacement costs and the regulator (CASA) enforces compliance.

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Current sections

Direct links to the current provisions in AD/GBK 117/15 - Main Rotor Blades with Bolted Lead Inner Weights.

Eurocopter BK 117 Series Helicopters

AD/GBK 117/15	Main Rotor Blades with BoltedLead Inner Weights	6/2005 DM

Applicability:	Models BK117 A-1 through C-1, all serial numbers.
Requirement:	Action in accordance with Eurocopter Deutschland Alert Service Bulletin No. ASB-MBB-BK117-10-125, dated 14 February 2005, or later EASA approved revision.Note: LBA AD D-2005-115 refers.
Compliance:	As specified in the Requirement document. Unless it has already been accomplished, the 4 week period for the log check begins on 20 April 2005.
	This Airworthiness Directive becomes effective on 20 April 2005.
Background:	The LBA received a report of severe vibrations in-flight on a BK117 helicopter. The pilot immediately performed a safe landing, and the initial inspection revealed a cracked-open main rotor blade trailing edge. A subsequent inspection by the manufacturer revealed that a part of a bolted lead inner weight had come loose. This Directive introduces a life limit for blades with bolted lead inner weights installed.

View image in the official source
David Villiers
Delegate of the Civil Aviation Safety Authority

14 April 2005

AD/GBK 117/15

Main Rotor Blades with BoltedLead Inner

Main Rotor Blades with BoltedLead Inner Weights

Main Rotor Blades with Bolted

Lead Inner Weights

6/2005 DM

Source text

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

Eurocopter BK 117 Series Helicopters Eurocopter BK 117 Series Helicopters

Eurocopter BK 117 Series Helicopters

AD/GBK 117/15	Main Rotor Blades with BoltedLead Inner Weights	6/2005 DM

Applicability:	Models BK117 A-1 through C-1, all serial numbers.
Requirement:	Action in accordance with Eurocopter Deutschland Alert Service Bulletin No. ASB-MBB-BK117-10-125, dated 14 February 2005, or later EASA approved revision.Note: LBA AD D-2005-115 refers.
Compliance:	As specified in the Requirement document. Unless it has already been accomplished, the 4 week period for the log check begins on 20 April 2005.
	This Airworthiness Directive becomes effective on 20 April 2005.
Background:	The LBA received a report of severe vibrations in-flight on a BK117 helicopter. The pilot immediately performed a safe landing, and the initial inspection revealed a cracked-open main rotor blade trailing edge. A subsequent inspection by the manufacturer revealed that a part of a bolted lead inner weight had come loose. This Directive introduces a life limit for blades with bolted lead inner weights installed.

David Villiers
Delegate of the Civil Aviation Safety Authority

14 April 2005

AD/GBK 117/15 AD/GBK 117/15

AD/GBK 117/15

Main Rotor Blades with BoltedLead Inner Main Rotor Blades with BoltedLead Inner Weights

Main Rotor Blades with Bolted

Lead Inner Weights

Deep dive

Current sections

Eurocopter BK 117 Series Helicopters

Eurocopter BK 117 Series Helicopters

AD/GBK 117/15

AD/GBK 117/15

Main Rotor Blades with BoltedLead Inner Weights

Main Rotor Blades with Bolted

6/2005 DM

6/2005 DM

Source text

Eurocopter BK 117 Series Helicopters Eurocopter BK 117 Series Helicopters

Eurocopter BK 117 Series Helicopters

AD/GBK 117/15 AD/GBK 117/15

AD/GBK 117/15

Main Rotor Blades with BoltedLead Inner Main Rotor Blades with BoltedLead Inner Weights

Main Rotor Blades with Bolted

6/2005 DM 6/2005 DM

6/2005 DM