Commonwealth legislation

AD/G73/23 - Operation of Deicing Boots

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This Airworthiness Directive requires owners/operators of G-73 and G-73T aircraft with pneumatic deicing boots to amend the Aircraft Flight Manual so boots are switched on at the first sign of ice or when an ice detector alerts, kept cycling (automatic or manually) to minimise ice, and only turned off after completing a full deicing cycle once clear of icing. The CoR holder may sign the logbook to record compliance. The stated purpose is to reduce ice accumulation; operators bear documentation, training and operational costs and CASA enforces the rule.

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Current sections

Direct links to the current provisions in AD/G73/23 - Operation of Deicing Boots.

AIRWORTHINESS DIRECTIVE

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For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

AD/G73/23 Operation of Deicing Boots 7/2

AD/G73/23 Operation of Deicing Boots 7/2000

Applicability: Model G-73 and G-73T series aircraft fitted with pneumatic deicing boots.

Requirement: Revise the Limitations Section of the Aircraft Flight Manual (AFM) by incorporating the following:

" Except if the AFM otherwise specifies that deicing boots should not be used for certain phases of flight (e.g., take-off, final approach, and landing), compliance with the following is required.

Wing and Tail Leading Edge Pneumatic Deicing Boot System, if installed, must be activated:

\- At the first sign of ice formation anywhere on the aircraft, or upon annunciation from an ice detector system, whichever occurs first; and

\- The system must either be continued to be operated in the automatic cycling mode, if available; or the system must be manually cycled as needed to minimize the ice accretions on the airframe.

"The wing and tail leading edge pneumatic deicing boot system may be deactivated only after completion of an entire deicing cycle after leaving icing conditions."

Alternatively, a copy of this Directive may be inserted in the Limitations Section of the Aircraft Flight Manual preceding the paragraph covering Operation in Icing Conditions.

This AFM amendment may be accomplished by the aircraft CoR holder, who can sign the aircraft logbook for completion of this Directive.

Note 1: Ice adhesion can be reduced by periodic treatment of deicing boots with a deicing compound such as “ICEX”, an ice-phobic chemical spray.

Note 2: FAA AD 99-19-07 Amendment 39-11296 refers.

Source text

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

AIRWORTHINESS DIRECTIVE AIRWORTHINESS DIRECTIVE

AIRWORTHINESS DIRECTIVE

For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

AD/G73/23 Operation of Deicing Boots 7/2 AD/G73/23 Operation of Deicing Boots 7/2000

AD/G73/23 Operation of Deicing Boots 7/2000

Applicability: Model G-73 and G-73T series aircraft fitted with pneumatic deicing boots.

Requirement: Revise the Limitations Section of the Aircraft Flight Manual (AFM) by incorporating the following:

" Except if the AFM otherwise specifies that deicing boots should not be used for certain phases of flight (e.g., take-off, final approach, and landing), compliance with the following is required.

Wing and Tail Leading Edge Pneumatic Deicing Boot System, if installed, must be activated:

\- At the first sign of ice formation anywhere on the aircraft, or upon annunciation from an ice detector system, whichever occurs first; and

\- The system must either be continued to be operated in the automatic cycling mode, if available; or the system must be manually cycled as needed to minimize the ice accretions on the airframe.

"The wing and tail leading edge pneumatic deicing boot system may be deactivated only after completion of an entire deicing cycle after leaving icing conditions."

Alternatively, a copy of this Directive may be inserted in the Limitations Section of the Aircraft Flight Manual preceding the paragraph covering Operation in Icing Conditions.

This AFM amendment may be accomplished by the aircraft CoR holder, who can sign the aircraft logbook for completion of this Directive.

Note 1: Ice adhesion can be reduced by periodic treatment of deicing boots with a deicing compound such as “ICEX”, an ice-phobic chemical spray.

Note 2: FAA AD 99-19-07 Amendment 39-11296 refers.