Commonwealth legislation

AD/F28/79 Amdt 1 - Main Landing Gear Torque Link Dampers

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Commonwealth

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legislative instrument

Plain English Summary

4/10 complexity

This Airworthiness Directive requires operators of Fokker F28 Mk1000–Mk4000 aircraft to inspect main landing gear per Fokker service instructions and to replace torque link dampers P/N 23700-1 or 23700-3 with modified dampers P/N 23700-5 within specified flight-cycle and time limits. It addresses repeated torque-link failures by mandating hardware change and revised maintenance. Aircraft owners/operators must carry out the inspections and replacements to comply with the directive and keep affected aeroplanes airworthy.

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AD/F28/79 Amdt 1 - Main Landing Gear Torque Link Dampers

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
Fokker F28 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/F28/79 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/F28/79

Amdt 1

Main Landing Gear Torque Link Dampers 6/2000

Applicability: F28 Mk 1000 to Mk 4000 all serial numbers.

Requirement: 1. Inspect main landing gear in accordance with Fokker SB F28/32-151 dated 09 August 1996.

Remove main landing gear torque link dampers, P/N 23700-1 and/or 23700-3, from the aircraft and install modified main landing gear dampers P/N 23700-5 in accordance with Fokker SB SBF-28/32-157R1.

Note: RLD AD 1996-103(A) and RLD AD 1999-138(A) refer.

Compliance: 1. Perform the following inspections in accordance with "2 Accomplishment Instructions” of Requirement 1 document.

a. Part 1.D.- within 1000 flight cycles after 05 December 1996; and
b. Parts 1.A, 1.B. and 1.C. - within 3000 flight cycles after 05 December 1996, thereafter at intervals not exceeding 3000 flight cycles; and

c. Part 2.- Before 30 May 1999.
1. Unless previously carried out, within 24 months time in service from the effective date of this Directive.

This Amendment becomes effective on 15 June 2000.

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Background: There have been many MLG torque link failures in the applicable aircraft.

Maintenance deficiencies caused reduced natural stability of the MLG lateral and torsional mode during landing causing failure. In-service experience also found that operators, despite improved maintenance procedures may not succeed in effectively eliminating torque link failures. Since a potentially unsafe condition still exists or may develop, this Directive requires installation of dampers on all applicable aircraft, and revised maintenance until that is accomplished.

Amendment 1 is raised to mandate replacement of the -1 and -3 dampers with modified -5 dampers.

The original issue of this Airworthiness Directive became effective on 5 December 1996.

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Eugene Paul Holzapfel

Delegate of the Civil Aviation Safety Authority 5 May 2000

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The above AD is notified in the Commonwealth of Australia Gazette on 17 May 2000.

Source text

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

1 AD/F28/79 Amdt 1 - Main Landing Gear Torque Link Dampers

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Fokker F28 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/F28/79 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/F28/79

Amdt 1

Main Landing Gear Torque Link Dampers 6/2000

Applicability: F28 Mk 1000 to Mk 4000 all serial numbers.

Requirement: 1. Inspect main landing gear in accordance with Fokker SB F28/32-151 dated 09 August 1996.

Remove main landing gear torque link dampers, P/N 23700-1 and/or 23700-3, from the aircraft and install modified main landing gear dampers P/N 23700-5 in accordance with Fokker SB SBF-28/32-157R1.

Note: RLD AD 1996-103(A) and RLD AD 1999-138(A) refer.

Compliance: 1. Perform the following inspections in accordance with "2 Accomplishment Instructions” of Requirement 1 document.

a. Part 1.D.- within 1000 flight cycles after 05 December 1996; and
b. Parts 1.A, 1.B. and 1.C. - within 3000 flight cycles after 05 December 1996, thereafter at intervals not exceeding 3000 flight cycles; and

c. Part 2.- Before 30 May 1999.
1. Unless previously carried out, within 24 months time in service from the effective date of this Directive.

This Amendment becomes effective on 15 June 2000.

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Background: There have been many MLG torque link failures in the applicable aircraft.