Commonwealth legislation

AD/BO 105/28 - Tail Rotor Balance Weights

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

What it does: Requires operators of Eurocopter Canada BO 105 LS A‑3 helicopters to inspect tail‑rotor balance weights and control levers per Eurocopter ASB BO 105 LS 30‑12, initially within 2 months or 100 flight hours and then every 600 flight hours or 48 months, and to replace parts that exceed damage limits before further flight. Why it matters: Transport Canada says the inspections prevent corrosion-related weight separation that could cause severe vibration and loss of control. Operators bear inspection and replacement costs; replacements do not end the recurring inspection duty.

JSON API

Deep dive

Want the full deep dive?

Zoe can write the in-depth analysis on top of the summary above: how it works, who it affects and what each part actually does.

Current sections

Direct links to the current provisions in AD/BO 105/28 - Tail Rotor Balance Weights.

Eurocopter BO 105 Series Helicopters

AD/BO 105/28	Tail Rotor Balance Weights	9/2009

Applicability:	Eurocopter Canada BO 105 LS A-3 helicopters.
Requirement:	1. Perform the initial and repeat inspections of the tail rotor balance weights and control levers in accordance with the accomplishment instructions of Eurocopter Canada Alert Service Bulletin (ASB) BO 105 LS 30-12, dated 12 December 2008, or later revisions approved by the Chief, Continuing Airworthiness, Transport Canada.2. If, as a result of the inspections above, the detected damage exceeds the acceptable limits specified in ASB BO 105 LS 30-12; replace the affected parts with serviceable parts. Replacement of parts does not constitute terminating action for the repetitive inspection requirements of this directive.Note: Transport Canada AD CF-2009-12 dated 24 March 2009 refers.
Compliance:	For Requirement 1 - Initially, within the next 2 months or 100 flight hours, whichever occurs first after the effective date of this AD, unless already accomplished.Thereafter at intervals not exceeding 600 flight hours or 48 months, whichever occurs first.For Requirement 2 - Before further flight.
	This Airworthiness Directive becomes effective on 27 August 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 corrected, could lead to balance weight separation from the tail rotor, resulting in severe vibration and consequent loss of control of the helicopter.

View image in the official source
James Coyne
Delegate of the Civil Aviation Safety Authority

15 July 2009

AD/BO 105/28

Tail Rotor Balance Weights

9/2009

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 105/28	Tail Rotor Balance Weights	9/2009

Applicability:	Eurocopter Canada BO 105 LS A-3 helicopters.
Requirement:	1. Perform the initial and repeat inspections of the tail rotor balance weights and control levers in accordance with the accomplishment instructions of Eurocopter Canada Alert Service Bulletin (ASB) BO 105 LS 30-12, dated 12 December 2008, or later revisions approved by the Chief, Continuing Airworthiness, Transport Canada.2. If, as a result of the inspections above, the detected damage exceeds the acceptable limits specified in ASB BO 105 LS 30-12; replace the affected parts with serviceable parts. Replacement of parts does not constitute terminating action for the repetitive inspection requirements of this directive.Note: Transport Canada AD CF-2009-12 dated 24 March 2009 refers.
Compliance:	For Requirement 1 - Initially, within the next 2 months or 100 flight hours, whichever occurs first after the effective date of this AD, unless already accomplished.Thereafter at intervals not exceeding 600 flight hours or 48 months, whichever occurs first.For Requirement 2 - Before further flight.
	This Airworthiness Directive becomes effective on 27 August 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 corrected, could lead to balance weight separation from the tail rotor, resulting in severe vibration and consequent loss of control of the helicopter.

AD/BO 105/28 - Tail Rotor Balance Weights

Plain English Summary

Deep dive

Current sections

Eurocopter BO 105 Series Helicopters

Eurocopter BO 105 Series Helicopters

AD/BO 105/28

AD/BO 105/28

Tail Rotor Balance Weights

Tail Rotor Balance Weights

9/2009

9/2009

Source text

Eurocopter BO 105 Series Helicopters Eurocopter BO 105 Series Helicopters

Eurocopter BO 105 Series Helicopters

AD/BO 105/28 AD/BO 105/28

AD/BO 105/28

Tail Rotor Balance Weights Tail Rotor Balance Weights

Tail Rotor Balance Weights

9/2009 9/2009

9/2009