Division Fokker F100 (F28 Mk 100) Series Aeroplan - AD/F100/95 - Fuel Fire Shut-off Valve Actuator - Fokker F100 (F28 Mk 100) Series Aeroplanes

Fokker F100 (F28 Mk 100) Series Aeroplanes

AD/F100/95	Fuel Fire Shut-off Valve Actuator	10/2009

Applicability:	Fokker Aircraft B.V. F28 Mark 0070 and Mark 0100 aeroplanes, all serial numbers, if an actuator Part Number (P/N) 9409122 or P/N 53-0013 is installed on one or both fuel fire shut-off valves.
Requirement:	1. Accomplish either Requirement 1.a. or 1.b. below, as applicable to the aeroplane configuration:a. For aeroplanes in pre-SBF100-76-018 dated 31 July 2008 configuration:Remove each fuel fire shut-off valve actuator with P/N 9409122 from the aeroplane and replace it with a fuel fire shut-off valve actuator P/N 53-0027 and accomplish the associated modifications in accordance with Part 1A or 1B, as applicable, of the Accomplishment Instructions of Fokker Services SBF100-76-020 dated 20 April 2009.b. For aeroplanes in post-SBF100-76-018 configuration:Remove each fuel fire shut-off valve actuator with P/N 53-0013 from the aeroplane and replace it with a fuel fire shut-off valve actuator P/N 53-0027 in accordance with Part 2 of the Accomplishment Instructions of Fokker Services SBF100-76-020.2. Do not install a P/N 53-0013 fuel fire shut-off valve actuator on any aeroplane.The use of later approved revisions of these documents is acceptable for compliance with the requirements of this AD.Note 1: After installation of P/N 53-0027 fuel fire shut-off valve actuators on an aeroplane, the requirements of AD/F100/84 (EASA AD 2007-0122) no longer apply to the fuel fire shut-off valve actuators installed on that aeroplane.Note 2: EASA AD 2009-0168 dated 3 August 2009 refers. This AD supersedes EASA AD 2008-0193.
Compliance:	For Requirement 1 - Within the next 15 months after the effective date of this AD.For Requirement 2 - After the effective date of this AD.

Applicability:

Fokker Aircraft B.V. F28 Mark 0070 and Mark 0100 aeroplanes, all serial numbers, if an actuator Part Number (P/N) 9409122 or P/N 53-0013 is installed on one or both fuel fire shut-off valves.

Requirement:

1. Accomplish either Requirement 1.a. or 1.b. below, as applicable to the aeroplane configuration:a. For aeroplanes in pre-SBF100-76-018 dated 31 July 2008 configuration:Remove each fuel fire shut-off valve actuator with P/N 9409122 from the aeroplane and replace it with a fuel fire shut-off valve actuator P/N 53-0027 and accomplish the associated modifications in accordance with Part 1A or 1B, as applicable, of the Accomplishment Instructions of Fokker Services SBF100-76-020 dated 20 April 2009.b. For aeroplanes in post-SBF100-76-018 configuration:Remove each fuel fire shut-off valve actuator with P/N 53-0013 from the aeroplane and replace it with a fuel fire shut-off valve actuator P/N 53-0027 in accordance with Part 2 of the Accomplishment Instructions of Fokker Services SBF100-76-020.2. Do not install a P/N 53-0013 fuel fire shut-off valve actuator on any aeroplane.The use of later approved revisions of these documents is acceptable for compliance with the requirements of this AD.Note 1: After installation of P/N 53-0027 fuel fire shut-off valve actuators on an aeroplane, the requirements of AD/F100/84 (EASA AD 2007-0122) no longer apply to the fuel fire shut-off valve actuators installed on that aeroplane.Note 2: EASA AD 2009-0168 dated 3 August 2009 refers. This AD supersedes EASA AD 2008-0193.

Compliance:

For Requirement 1 - Within the next 15 months after the effective date of this AD.For Requirement 2 - After the effective date of this AD.

	This Airworthiness Directive becomes effective on 24 September 2009.
Background:	Due to their position on the aeroplane, fuel fire shut-off valve actuators P/N 9409122 are susceptible to freezing, which has an adverse effect on the operation of the valve. Also, due to various causes, the failure rate of actuator P/N 9409122 is higher than expected. Failure or freezing of the actuator may prevent the flight crew to close the fuel fire shut-off valve in case of an engine fire.Aeroplanes serial numbers 11244 through 11441 were delivered from the production line with actuators P/N 9401037 (“chimney type”) installed. However, on some aeroplanes, these actuators have subsequently been replaced in service with actuators P/N 9409122 (using mounting blocks P/N 7923505) on one or both fuel fire shut-off valves. As a result, those aeroplanes are also affected by this unsafe condition.To address and correct this unsafe condition, CASA issued AD/F100/92 (EASA AD 2008-0193), requiring the replacement of all P/N 9409122 fuel fire shut-off valve actuators with new actuators developed by the manufacturer Eaton Aerospace, P/N 53-0013, which have improved reliability and are less susceptible to freezing.Following the introduction of actuator P/N 53-0013 in service, Eaton Aerospace reported manufacturing and design errors on actuators with P/N 53-0013. As a result of these errors, the top-cap of the actuator may become loose, possibly leading to actuator failure. Eaton Aerospace has eliminated these problems by introducing a new actuator P/N 53-0027 and Fokker Services have published SBF100-76-020 to introduce these improved actuators on aeroplanes.As a consequence of AD/F100/92, both P/N 9409122 and P/N 53-0013 fuel fire shut-off valve actuators are currently installed on aeroplanes affected by this AD.For the reasons described above, this AD supersedes AD/F100/92 and requires the installation of new P/N 53-0027 actuators. This AD also prohibits the installation of P/N 53-0013 actuators in accordance with SBF100-76-018 (which has been cancelled), as previously required by AD/F100/92.

This Airworthiness Directive becomes effective on 24 September 2009.

Background:

Due to their position on the aeroplane, fuel fire shut-off valve actuators P/N 9409122 are susceptible to freezing, which has an adverse effect on the operation of the valve. Also, due to various causes, the failure rate of actuator P/N 9409122 is higher than expected. Failure or freezing of the actuator may prevent the flight crew to close the fuel fire shut-off valve in case of an engine fire.Aeroplanes serial numbers 11244 through 11441 were delivered from the production line with actuators P/N 9401037 (“chimney type”) installed. However, on some aeroplanes, these actuators have subsequently been replaced in service with actuators P/N 9409122 (using mounting blocks P/N 7923505) on one or both fuel fire shut-off valves. As a result, those aeroplanes are also affected by this unsafe condition.To address and correct this unsafe condition, CASA issued AD/F100/92 (EASA AD 2008-0193), requiring the replacement of all P/N 9409122 fuel fire shut-off valve actuators with new actuators developed by the manufacturer Eaton Aerospace, P/N 53-0013, which have improved reliability and are less susceptible to freezing.Following the introduction of actuator P/N 53-0013 in service, Eaton Aerospace reported manufacturing and design errors on actuators with P/N 53-0013. As a result of these errors, the top-cap of the actuator may become loose, possibly leading to actuator failure. Eaton Aerospace has eliminated these problems by introducing a new actuator P/N 53-0027 and Fokker Services have published SBF100-76-020 to introduce these improved actuators on aeroplanes.As a consequence of AD/F100/92, both P/N 9409122 and P/N 53-0013 fuel fire shut-off valve actuators are currently installed on aeroplanes affected by this AD.For the reasons described above, this AD supersedes AD/F100/92 and requires the installation of new P/N 53-0027 actuators. This AD also prohibits the installation of P/N 53-0013 actuators in accordance with SBF100-76-018 (which has been cancelled), as previously required by AD/F100/92.

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