For the reasons set out in the background section, CASA 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 CASA 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.
Gippsland Aeronautics GA8 Series Aeroplanes
Fuel System Ventilation and Drainage Modification
This AD applies to GippsAero GA8 and GA8-TC 320 aircraft as identified in GippsAero Service Bulletin SB-GA8-2012-96 Issue 4, or later approved revision.
The registered operator of an aircraft must:
(1) modify the aircraft in accordance with Part 1 of GippsAero Service Bulletin
SB-GA8-2012-96 Issue 4, or later approved revision; and
(2) if a cargo pod part number GA8-255004-017 or GA8-255004-019 is installed in the aircraft - modify the cargo pod in accordance with Part 2 of GippsAero Service Bulletin SB-GA8-2012-96 Issue 4, or later approved revision.
(1) Requirement (1) must be completed before the earlier of the following:
(a) 100 flight hours;
(b) 3 months;
after the effective date of this AD.
(2) Requirement (2) must be completed concurrently with requirement (1).
The effective date of this AD is 6 September 2013.
The GippsAero GA8 and GA8-TC 320 aircraft Mk II fuel system features an integral sump tank located in the floor structure forward of the co-pilot seat. The current configuration of the compartments adjacent to the Mk II sump tank do not meet the requirements of regulation 23.967 (b) of the Federal Aviation Regulations of the United States of America in that they are not suitably ventilated and drained to prevent the accumulation of flammable fluids or vapours.
Delegate of the Civil Aviation Safety Authority
2 September 2013