Commonwealth legislation

AD/F100/2 - Main Landing Gear Downlock - Inspection/Replacement

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This Airworthiness Directive requires operators of Fokker F28 Mk 100 aircraft fitted with specified Dowty main landing gear (MLG) downlock actuators to perform recurring inspections using the cited Fokker and Dowty service bulletins and to replace any actuator that fails inspection under the Aircraft Maintenance Manual, returning defective units to the manufacturer. Operators pay for inspections, replacements and returns; maintenance personnel must carry out the work on the timetable set by the AD (Compliance).

JSON API

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/F100/2 - Main Landing Gear Downlock - Inspection/Replacement.

AD/F100/2 - Main Landing Gear Downlock - Inspection/Replacement

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source
Fokker F100 (F28 Mk 100) Series Aeroplanes

AD/F100/2 Main Landing Gear Downlock - Inspection/Replacement

1/99

Applicability: F28 Mk. 100 aircraft all serial numbers, fitted with Dowty Aerospace Hydraulics MLG Downlock Actuators (Jack & Springpot Units) Part Number (P/N) 201218001, P/N 201218002, P/N 201218003, or P/N 201218004, all serial numbers.

Requirement: 1. Inspect the applicable MLG Downlock Actuator in accordance with Fokker Service Bulletin SB F100-32-072 dated 30 March 1993 and in accordance with Dowty Aerospace Hydraulics SB F100-32-505 dated 24 March 1993.

Replace MLG Downlock Actuator in accordance with the Aircraft Maintenance Manual Chapter 32-32-05 and return the defective unit to the manufacturer for further analysis.

Note: RLD Airworthiness Directive 93-052 (A) dated 23 April 1993 refers.

Compliance: 1. At intervals not to exceed 1250 flight hours.

Following failure to meet the requirements of the inspection at requirement 1 above.

This Airworthiness Directive becomes effective on 28 January 1999.

Background: In service experience had revealed arisings of landing gear “unsafe” warnings which had been attributed to MLG Downlock actuator internal failures. This Directive is issued to introduce regular inspections to ensure correct operation of the MLG Downlock actuators.

Source text

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

1 AD/F100/2 - Main Landing Gear Downlock - Inspection/Replacement