Commonwealth legislation

AD/CA21/10 Amdt 1 - Ailerons

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Commonwealth

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legislative instrument

Plain English Summary

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This amendment requires owners/operators of Skyfox CA21/CA22/CA22A aeroplanes to have a CAR 35 Authorised Person inspect both ailerons for balance, rigging, internal/external corrosion and cracks at the torque-tube/spar joint, and to improve aileron sealing and drainage. Inspections and any approved modifications must be carried out before further flight according to the AD’s dates and reinspection schedule. The AD says these measures respond to an in‑flight aileron separation and allows CAR 35 persons to develop and approve fixes where no Type Certificate holder is active.

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AD/CA21/10 Amdt 1 - Ailerons

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source
View image in the official source
Skyfox Aviation (Calair/Hedaro) CA21 and CA22A Series Aeroplanes

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 revokes Airworthiness Directive (AD) AD/CA21/10 and issues the following 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/CA21/10

Amdt 1

Ailerons 10/2000 TX

Applicability: All CA21, CA22 and CA22A series aircraft.

Requirement: 1. Following instructions approved by a CAR 35 Authorised Person, inspect both the left and right ailerons for:

Balance;

b. Rigging;

c. Corrosion, internal and external; and

d. Cracks in the joint between the aileron’s torque tube and its spar.

Note 1: The reason the Authority is not able to rely on the above inspections being done as part of normal maintenance is that none of the above inspections are included in the maintenance manual. That is the reason for this AD.

2. Following instructions approved by a CAR 35 Authorised Person, improve the sealing and drainage of both left and right ailerons.

3. Following instructions approved by a CAR 35 Authorised Person, inspect both the left and right ailerons for conformity with the type design of the joint between the aileron’s torque tube and its spar.

Note 2: In other words, check that the joint was built to drawing.

Compliance: For Requirement 1:

Inspect before further flight after 24 August 2000.
Reinspect at the times specified in the instructions approved by the CAR 35 Authorised Person.

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Note 3: Inspection for corrosion and cracks is not required before further flight if the ailerons have been inspected since 7 July 2000 by a method approved by either the Authority or a CAR 35 Authorised Person. However, ailerons must be reinspected later at the times specified in instructions approved for Amendment 1 to this Airworthiness Directive by a CAR 35 Authorised Person.

Note 4: CAR 35 Authorised Persons may include in their instructions an option to modify the ailerons to avoid the need for further inspections for corrosion and cracks (Requirements 1c and 1d).

For Requirements 2 and 3: Before further flight after 7 September 2000.

Note 5: The Requirement 3 inspection is not necessary if the joint has been modified to a design approved under CAR 35. See Note 4.

This amendment becomes effective on 24 August 2000.

Background: The Civil Aviation Safety Authority received a report of the in-flight separation of the right hand aileron from a Skyfox CA25N aircraft. Investigation revealed that a failure occurred where the aileron’s torque tube attaches to its spar.

Further investigation has not been able to conclusively determine the cause of the failure. However it has revealed several potentially unsafe conditions that were not covered by the original issue of this AD. Therefore Amendment 1 expands the set of potentially unsafe conditions that must be checked before further flight. Also, in the absence of an active Type Certificate holder, Amendment 1 allows technically competent industry representatives to develop and approve their own safety solutions.

The original issue of this Airworthiness Directive became effective on 7 July 2000.

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Neville James Probert

Delegate of the Civil Aviation Safety Authority 24 August 2000

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The above AD is notified in the Commonwealth of Australia Gazette on 24 August 2000.

Source text

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

1 AD/CA21/10 Amdt 1 - Ailerons

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Skyfox Aviation (Calair/Hedaro) CA21 and CA22A Series Aeroplanes

AIRWORTHINESS DIRECTIVE

For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/CA21/10 and issues the following 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/CA21/10

Amdt 1

Ailerons 10/2000 TX

Applicability: All CA21, CA22 and CA22A series aircraft.

Requirement: 1. Following instructions approved by a CAR 35 Authorised Person, inspect both the left and right ailerons for:

Balance;

b. Rigging;

c. Corrosion, internal and external; and

d. Cracks in the joint between the aileron’s torque tube and its spar.

2. Following instructions approved by a CAR 35 Authorised Person, improve the sealing and drainage of both left and right ailerons.

3. Following instructions approved by a CAR 35 Authorised Person, inspect both the left and right ailerons for conformity with the type design of the joint between the aileron’s torque tube and its spar.

Note 2: In other words, check that the joint was built to drawing.

Compliance: For Requirement 1:

Inspect before further flight after 24 August 2000.
Reinspect at the times specified in the instructions approved by the CAR 35 Authorised Person.

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES