Federal Register of Legislation - Australian Government

Primary content

AD/F100/92 Airworthiness Directives/Pt 105 — Aircraft as made
Engine Controls - Fuel Fire Shut-off Valve Actuator
Administered by: Infrastructure and Transport
Exempt from sunsetting by the Legislative Instruments Act 2003 s 54(2) item 9
Registered 11 Dec 2008
Tabling HistoryDate
Tabled HR03-Feb-2009
Tabled Senate03-Feb-2009
Date of repeal 24 Sep 2009
Repealed by AD/F100/92 - Engine Controls - Fuel Fire Shut-off Valve Actuator - CANCELLED

 

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.

Fokker F100 (F28 Mk 100) Series Aeroplanes

AD/F100/92

Engine Controls - Fuel Fire
Shut-off Valve Actuator

13/2008

 

Applicability:

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

Requirement:

Remove each fuel fire shut-off valve actuator P/N 9409122 from the aircraft, replace it with a fuel fire shut-off valve actuator P/N 53-0013 and accomplish the associated modifications in accordance with the Accomplishment Instructions of Fokker Service Bulletin SBF100-76-018 dated 31 July 2008.

Note 1:  After installation of P/N 53-0013 fuel fire shut-off valve actuators on an aircraft, the requirements of EASA AD 2007-0122 no longer apply to the fuel fire shut-off valve actuators installed on that aircraft.

Note 2:  EASA AD 2008-0193 dated 21 October 2008 refers.

Compliance:

Within the next 24 months after the effective date of this AD.

 

This Airworthiness Directive becomes effective on 18 December 2008.

Background:

Due to their position on the aircraft, 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.  Aircraft with serial numbers 11244 through 11441 were delivered from the production line with actuators P/N 9401037 (“chimney type”) installed.  However, on some of these aircraft, actuators P/N 9401037 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 aircraft are also affected by this unsafe condition.

 

 

 

 

 

 

This AD requires the replacement of all P/N 9409122 fuel fire shut-off valve actuators with a new actuator P/N 53-0013 which has improved reliability and is less susceptible to freezing.  After installation of P/N 53-0013 fuel fire shut-off valve actuators on an aircraft, the requirements of this AD no longer apply to the fuel fire shut-off valve actuators installed on that aircraft.


James Coyne
Delegate of the Civil Aviation Safety Authority

7 November 2008