Commonwealth legislation

AD/BO 105/26 - Tail Rotor - Balance Weights

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legislative instrument

Plain English Summary

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This airworthiness directive requires operators of listed Eurocopter BO 105 series helicopters to carry out repetitive visual inspections of tail rotor balance weights and control levers per ECD ASB BO105‑30‑116.2, and to replace any components with damage beyond the ASB's limits. It sets an initial compliance deadline (within 2 months or 100 flight hours) and recurring intervals (600 FH or 48 months), and is intended to prevent thread corrosion that could cause tail rotor part separation and loss of control.

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Direct links to the current provisions in AD/BO 105/26 - Tail Rotor - Balance Weights.

Eurocopter BO 105 Series Helicopters

AD/BO 105/26	Tail Rotor - Balance Weights	2/2009

Applicability:	Eurocopter Deutschland (ECD) GmbH Models BO 105 A, BO 105 C,BO 105 LS A-1, BO 105 D, BO 105 DS, BO 105DB, BO 105 DBS, BO 105 DB-4, BO 105 DBS-4, BO 105 DBS-5 and BO 105 S helicopters, all serial numbers.
Requirement:	1. Inspect the tail rotor balance weights and control levers in accordance with ECD BO105 Alert Service Bulletin (ASB) No. ASB BO105-30-116.2. If, during any inspection as detailed in Requirement 1 of this AD, damage is detected which exceeds the acceptable limits as specified in the ASB, replace the affected components with serviceable parts.Replacement of parts does not constitute terminating action for the repetitive inspection requirements of this AD.Note: EASA AD 2008-0206 dated 25 November 2008 refers.
Compliance:	For Requirement 1 - Within the next 2 months or 100 flight hours (FH), whichever occurs first after the effective date of this AD, and thereafter at intervals not to exceed 600 FH (+ 60 FH) or 48 months (+ 6 months), whichever occurs first.For Requirement 2 - Before further flight.
	This Airworthiness Directive becomes effective on 12 February 2009.
Background:	During a periodical inspection, corrosion was detected on the tail rotor balance weights in the area of the attachment thread. This condition, if not detected and corrected, could lead to failure of the threads, possibly resulting in separation of tail rotor parts, subsequent severe tail rotor vibration and consequent loss of control of the helicopter.

	For the reasons described above, this AD requires repetitive visual inspections of the tail rotor balance weights and control levers to identify any damage and the replacement of damaged components.

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James Coyne
Delegate of the Civil Aviation Safety Authority

22 December 2008

AD/BO 105/26

Tail Rotor - Balance Weights

2/2009

Source text

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

Eurocopter BO 105 Series Helicopters Eurocopter BO 105 Series Helicopters

Eurocopter BO 105 Series Helicopters

AD/BO 105/26	Tail Rotor - Balance Weights	2/2009

Applicability:	Eurocopter Deutschland (ECD) GmbH Models BO 105 A, BO 105 C,BO 105 LS A-1, BO 105 D, BO 105 DS, BO 105DB, BO 105 DBS, BO 105 DB-4, BO 105 DBS-4, BO 105 DBS-5 and BO 105 S helicopters, all serial numbers.
Requirement:	1. Inspect the tail rotor balance weights and control levers in accordance with ECD BO105 Alert Service Bulletin (ASB) No. ASB BO105-30-116.2. If, during any inspection as detailed in Requirement 1 of this AD, damage is detected which exceeds the acceptable limits as specified in the ASB, replace the affected components with serviceable parts.Replacement of parts does not constitute terminating action for the repetitive inspection requirements of this AD.Note: EASA AD 2008-0206 dated 25 November 2008 refers.
Compliance:	For Requirement 1 - Within the next 2 months or 100 flight hours (FH), whichever occurs first after the effective date of this AD, and thereafter at intervals not to exceed 600 FH (+ 60 FH) or 48 months (+ 6 months), whichever occurs first.For Requirement 2 - Before further flight.
	This Airworthiness Directive becomes effective on 12 February 2009.
Background:	During a periodical inspection, corrosion was detected on the tail rotor balance weights in the area of the attachment thread. This condition, if not detected and corrected, could lead to failure of the threads, possibly resulting in separation of tail rotor parts, subsequent severe tail rotor vibration and consequent loss of control of the helicopter.

	For the reasons described above, this AD requires repetitive visual inspections of the tail rotor balance weights and control levers to identify any damage and the replacement of damaged components.

AD/BO 105/26 - Tail Rotor - Balance Weights

Plain English Summary

Deep dive

Current sections

Eurocopter BO 105 Series Helicopters

Eurocopter BO 105 Series Helicopters

AD/BO 105/26

AD/BO 105/26

Tail Rotor - Balance Weights

Tail Rotor - Balance Weights

2/2009

2/2009

Source text

Eurocopter BO 105 Series Helicopters Eurocopter BO 105 Series Helicopters

Eurocopter BO 105 Series Helicopters

AD/BO 105/26 AD/BO 105/26

AD/BO 105/26

Tail Rotor - Balance Weights Tail Rotor - Balance Weights

Tail Rotor - Balance Weights

2/2009 2/2009

2/2009