Commonwealth legislation

AD/AC/97 - Aircraft Flight Manual, Flight into Icing Conditions

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This Airworthiness Directive requires operators of the listed aircraft models to update the Aircraft Flight Manual (AFM) Limitations section to add warnings about severe in-flight icing and procedures for exiting severe icing. It applies to all serial numbers of the specified models and matters because it makes new AFM cautions and monitoring steps mandatory for those aircraft, imposing an operational and paperwork change on operators.

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Current sections

Direct links to the current provisions in AD/AC/97 - Aircraft Flight Manual, Flight into Icing Conditions.

AIRWORTHINESS DIRECTIVE

View image in the official source

View image in the official source
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 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/AC/97 Aircraft Flight Manual, Flight

AD/AC/97 Aircraft Flight Manual, Flight into Icing Conditions 3/2000

Applicability: Models 500, 500A, 500B, 500S, 500U, 520, 560, 560A, 560E, 560F, 680, 680E, 680FL(P), 680T, 680V, 680W, 681, 685, 690, 690A, 690B, 690C, 690D, 695, 695A,

695B, and 720, all serial numbers.

Requirement: Revise:

the Limitations Section of the aircraft's Aircraft Flight Manual (AFM) by incorporating the following:

"WARNING"

Severe icing may result from environmental conditions outside of those for which the aircraft is certificated.

Flight in freezing rain, freezing drizzle, or mixed icing conditions (super cooled liquid water and ice crystals) may result in:

ice build-up on protected surfaces and exceed the capability of the ice protection system, or

ice forming aft of the protected surfaces.

This ice may not be shed using the ice protection systems, and may seriously degrade the performance and controllability of the aircraft.

THE FOLLOWING WEATHER CONDITIONS MAY BE

THE FOLLOWING WEATHER CONDITIONS MAY BE CONDUCIVE TO SEVERE IN-FLIGHT ICING:

Visible rain at temperatures below 0 degrees Celsius ambient air temperature;
Droplets that splash or splatter on impact at temperatures below 0 degrees Celsius ambient air temperature.

PROCEDURES FOR EXITING A SEVERE ICING

ENVIRONMENT: (These procedures are applicable to all flight phases from take-off to landing.)

Monitor the ambient air temperature.

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 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/AC/97 Aircraft Flight Manual, Flight AD/AC/97 Aircraft Flight Manual, Flight into Icing Conditions 3/2000

AD/AC/97 Aircraft Flight Manual, Flight into Icing Conditions 3/2000

Applicability: Models 500, 500A, 500B, 500S, 500U, 520, 560, 560A, 560E, 560F, 680, 680E, 680FL(P), 680T, 680V, 680W, 681, 685, 690, 690A, 690B, 690C, 690D, 695, 695A,

695B, and 720, all serial numbers.

Requirement: Revise:

the Limitations Section of the aircraft's Aircraft Flight Manual (AFM) by incorporating the following:

"WARNING" "WARNING"

"WARNING"

Severe icing may result from environmental conditions outside of those for which the aircraft is certificated.

Flight in freezing rain, freezing drizzle, or mixed icing conditions (super cooled liquid water and ice crystals) may result in:

ice build-up on protected surfaces and exceed the capability of the ice protection system, or

ice forming aft of the protected surfaces.

This ice may not be shed using the ice protection systems, and may seriously degrade the performance and controllability of the aircraft.

THE FOLLOWING WEATHER CONDITIONS MAY BE THE FOLLOWING WEATHER CONDITIONS MAY BE CONDUCIVE TO SEVERE IN-FLIGHT ICING:

THE FOLLOWING WEATHER CONDITIONS MAY BE CONDUCIVE TO SEVERE IN-FLIGHT ICING:

Visible rain at temperatures below 0 degrees Celsius ambient air temperature;
Droplets that splash or splatter on impact at temperatures below 0 degrees Celsius ambient air temperature.

PROCEDURES FOR EXITING A SEVERE ICING PROCEDURES FOR EXITING A SEVERE ICING

PROCEDURES FOR EXITING A SEVERE ICING

ENVIRONMENT: (These procedures are applicable to all flight phases from take-off to landing.)