AD/Do 328/70 Main Landing Gear Bushings (Cth)
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 39.001(1) of CASR 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.
Dornier 328 Series Aeroplanes
| AD/DO 328/70 | Main Landing Gear Bushings | 3/2008 |
Applicability: | Model 328-100 aircraft, all serial numbers. |
Requirement: | Action in accordance with the requirements of EASA AD 2008-0009. Note: Dornier 328 Service Bulletin SB-328-32-245 Revision 2, and Messier-Dowty Service Bulletin 800-32-014 original issue, or later EASA approved revisions, refer. |
Compliance: | As specified in the Requirement document, with a revised effective date of |
| This Airworthiness Directive becomes effective on 13 March 2008. | |
Background: | During overhaul of a Model 328-100 landing gear unit, parts of the MLG main body and trailing arm bushings were found corroded. Investigation revealed that over time these bushings can migrate, creating the risk of corrosion in adjacent areas. Such corrosion if not detected, could cause damage to the MLG, possibly resulting in functional problems or failure. Based on these findings, the existing mandatory retrofit limitation for the MLG bushings at 15,000 flight cycles has been amended to add “or 6 calendar years time in service, whichever occurs first”. |
David Villiers
Delegate of the Civil Aviation Safety Authority
30 January 2008
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