Division Short SD3-30 Series Aeroplanes - AD/SD3-30/48 - Fuel Tank Safety - Fuel Airworthiness Limitations - Short SD3-30 Series Aeroplanes

Short SD3-30 Series Aeroplanes

AD/SD3-30/48	Fuel Tank Safety - FuelAirworthiness Limitations	11/2006

Applicability:	Model SD3-30 aeroplanes, all serial numbers.
Requirement:	1. Maintenance/Inspection Tasks -
	a. Accomplish the inspections including any necessary rectification action together with the installation of additional electrical bonding as specified in Bombardier Aerospace Shorts Service Bulletin SD330-28-37 dated June 2004 or later EASA approved revision.
	b. Incorporate the fuel system airworthiness limitations specified in Sections5-20-01 and 5-20-02 of the Aircraft Maintenance Manual Publications as introduced by the Temporary Revisions TR330-AMM-35 andTR330-AMM-35detailed into the operator approved maintenance programme/Schedule.
	Note 1: Accomplishment of the tasks specified in Requirement 1 is required to ensure that baseline inspections/checks are accomplished. Subsequent repeat inspections/checks shall then be accomplished in accordance with Section 5-20-01 of the AMM at the established repeat intervals.
	2. Critical Design Control Configuration Limitations (CDCCL) - The operator shall ensure that their internal maintenance control documentation is amended to reflect the data contained within Section 5.20.02 of the AMM and to provide appropriate text to highlight the existence of each CDCCL.
	Note 2: EASA AD 2006-0198 refers.
Compliance:	For Requirement 1 -
	a. Within six months after the effective date of this Directive.
	b. Within three months after the effective date of this Directive.
	For Requirement 2 - Before 1 July 2007.
	This Airworthiness Directive becomes effective on 26 October 2006.

Background:

Subsequent to accidents involving Fuel Tank System explosions in flight (Boeing 747-131 flight TWA800) and on the ground, the United States Federal Aviation Administration (FAA) published Special Federal Aviation Regulation 88 (SFAR88) in June 2001. SFAR 88 required a safety review of the aircraft Fuel Tank System to determine that the design meets the requirements of FAR § 25.901 and § 25.981(a) and (b).A similar regulation has been recommended by the European Joint Aviation Authorities (JAA) to the European National Aviation Authorities in JAA letter 04/00/02/07/03-L024 of 3 February 2003. The review was requested to be mandated by European National Airworthiness Authorities using JAR § 25.901(c), § 25.1309.In August 2005 the European Aviation Safety Agency (EASA) published a policy statement on the process for developing instructions for maintenance and inspection of Fuel Tank System ignition source prevention (EASA D 2005/CPRO, www.easa.eu.int/home/cert_policy_statements_en.html) that also included the EASA expectations with regard to compliance times of the corrective actions on the unsafe and the not unsafe part of the harmonised design review results. On a global scale the Type certificate (TC) holders committed themselves to the EASA published compliance dates (see EASA policy statement). The EASA policy statement was revised in March 2006 resetting the date of 31 December 2005 for the unsafe related actions to 1 July 2006.Fuel Airworthiness Limitations are items arising from a systems safety analysis that have been shown to have failure mode(s) associated with an ‘unsafe condition’ as defined in FAA Memo 2003-112-15 ‘SFAR 88 - Mandatory Action Decision Criteria’. These are identified in Failure Conditions for which an unacceptable probability of ignition risk could exist if specific tasks and/or practices are not performed in accordance with the manufacturers’ requirements.This Directive mandates the Fuel System Airworthiness Limitations comprising maintenance/inspection tasks and critical design control configuration limitations for SD3-30 series aeroplanes, that resulted from the design reviews and the JAA recommendation and EASA policy statement mentioned above.

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James Coyne
Delegate of the Civil Aviation Safety Authority

15 September 2006

Short SD3-30 Series Aeroplanes

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Short SD3-30 Series Aeroplanes