Commonwealth legislation

AD/EC 225/10 - Rotor Flight Controls - Tail Servo-control

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

This Airworthiness Directive requires operators of Eurocopter EC 225LP helicopters fitted with tail servo-control P/N SC7252 (pre‑amendment A) to apply a specified tightening torque, manually check for axial play of two control levers, and replace the servo if play is detected, following EUROCOPTER ASB No. 67A001 (or later NAA‑approved revision). Compliance deadlines differ by task (in‑service hours, spares-before-installation, and ‘before further flight’ if play is found), so operators and owners must inspect, maintain or replace affected parts.

JSON API Aviation / CASA instruments

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/EC 225/10 - Rotor Flight Controls - Tail Servo-control.

Eurocopter EC 225 Series Helicopters

AD/EC 225/10	Rotor Flight Controls - Tail Servo-control	11/2008

Applicability:	Eurocopter EC 225LP helicopters fitted with tail servo-control P/N SC7252 before amendment A.
Requirement:	1. Apply the tightening torque in specified in paragraph 2.B.2. of EUROCOPTER EC 225 Alert Service Bulletin (ASB) No. 67A001 or later NAA approved revision.2. Manually check for absence of axial play of the two control levers along the distributor shafts of the tail servo-control, in accordance with paragraph 2.B.3. of ASB No. 67A001 or later NAA approved revision.3. In case of play, replace the servo-control in accordance with paragraph 2.B.3. of the ASB 67A001 or later NAA approved revision.Note: DGAC AD F-2005-138 dated 3 August 2005 refers.
Compliance:	For Requirement 1 - No later than within 110 flying hours after the effective date of this AD.For Tail Servo Controls held as spares - Before installation on a helicopter.For Requirement 2 - No later than within a period of 135 to 165 flying hours following completion of Requirement 1 of this AD.For Requirement 3 - Before further flight.
	This Airworthiness Directive becomes effective on 23 October 2008.
Background:	This AD is in response to a case of control lever slipping along the shaft of one of the distributors, discovered upon removal of a tail servo-control for repair on an AS 332 helicopter.The control lever could have totally separated from the distributor shaft, which could lead to the loss of the tail rotor control.The attaching principle of the control lever/shaft connection of tail servo-control distributors on AS 332 and EC 225 is identical.

	Consequently, the purpose of this AD is to eliminate the risk of disconnection of tail servo-control distributor control levers.

View image in the official source
Charles Lenarcic
Delegate of the Civil Aviation Safety Authority

8 September 2008

AD/EC 225/10

Rotor Flight Controls - Tail Servo-contr

Rotor Flight Controls - Tail Servo-control

11/2008

Source text

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

Eurocopter EC 225 Series Helicopters Eurocopter EC 225 Series Helicopters

Eurocopter EC 225 Series Helicopters

AD/EC 225/10	Rotor Flight Controls - Tail Servo-control	11/2008

Applicability:	Eurocopter EC 225LP helicopters fitted with tail servo-control P/N SC7252 before amendment A.
Requirement:	1. Apply the tightening torque in specified in paragraph 2.B.2. of EUROCOPTER EC 225 Alert Service Bulletin (ASB) No. 67A001 or later NAA approved revision.2. Manually check for absence of axial play of the two control levers along the distributor shafts of the tail servo-control, in accordance with paragraph 2.B.3. of ASB No. 67A001 or later NAA approved revision.3. In case of play, replace the servo-control in accordance with paragraph 2.B.3. of the ASB 67A001 or later NAA approved revision.Note: DGAC AD F-2005-138 dated 3 August 2005 refers.
Compliance:	For Requirement 1 - No later than within 110 flying hours after the effective date of this AD.For Tail Servo Controls held as spares - Before installation on a helicopter.For Requirement 2 - No later than within a period of 135 to 165 flying hours following completion of Requirement 1 of this AD.For Requirement 3 - Before further flight.
	This Airworthiness Directive becomes effective on 23 October 2008.
Background:	This AD is in response to a case of control lever slipping along the shaft of one of the distributors, discovered upon removal of a tail servo-control for repair on an AS 332 helicopter.The control lever could have totally separated from the distributor shaft, which could lead to the loss of the tail rotor control.The attaching principle of the control lever/shaft connection of tail servo-control distributors on AS 332 and EC 225 is identical.

	Consequently, the purpose of this AD is to eliminate the risk of disconnection of tail servo-control distributor control levers.

Charles Lenarcic
Delegate of the Civil Aviation Safety Authority

8 September 2008

AD/EC 225/10 - Rotor Flight Controls - Tail Servo-control

Plain English Summary

Deep dive

Current sections

Eurocopter EC 225 Series Helicopters

Eurocopter EC 225 Series Helicopters

AD/EC 225/10

AD/EC 225/10

Rotor Flight Controls - Tail Servo-control

Rotor Flight Controls - Tail Servo-control

11/2008

11/2008

Source text

Eurocopter EC 225 Series Helicopters Eurocopter EC 225 Series Helicopters

Eurocopter EC 225 Series Helicopters

AD/EC 225/10 AD/EC 225/10

AD/EC 225/10

Rotor Flight Controls - Tail Servo-contr Rotor Flight Controls - Tail Servo-control

Rotor Flight Controls - Tail Servo-control

11/2008 11/2008

11/2008