AD/F2000/22 Engine Fire Detection Systems (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.

Dassault Aviation Falcon 2000 Series Aeroplanes

AD/F2000/22 Engine Fire Detection Systems 2/2007 DM

Applicability:

Falcon 2000EX aeroplanes with serial number (S/N) 06, 28 through 90, 93 and 95.

Requirement:

1.    Perform an engine fire detection integrity check in accordance with Dassault Aviation Service Bulletin (SB) F2000E X-137 dated 23 November 2006 or later EASA approved revision.

2.    If, as a result of the Requirement 1 integrity check, if either one or both the LH or the RH system is (are) found to be incorrect, check the actual resistance of both detectors of the incorrect system(s) on the affected engine(s) in accordance with (SB) F2000E X-137 or later EASA approved revision.

3.    Replace any detector that is determined to be faulty during the Requirement 2 resistance check.

Note:  EASA Emergency AD 2006-0356-E refers.

Compliance:

For Requirement 1 - No later than 5 January 2007.

For Requirements 2 and 3 - Before further flight after either the Requirement 1 or 2 check, as applicable.

This Airworthiness Directive becomes effective on 4 December 2006.

Background:

The European Aviation Safety Agency (EASA) has advised that troubleshooting of a "ENG 1 FIRE DETECT FAIL" CAS message that occurred on an in-service aircraft revealed that the detector threshold tolerances could not identify a single failure of one engine fire detector loop out of the two present on each engine.  The fire detection system is therefore not correctly monitored, and its integrity is not guaranteed at all times.

The aim of this Directive is to verify the fire detection system integrity by mandating a one time inspection and, if necessary, the replacement of faulty detector pending further modification of the monitoring system.

This Airworthiness Directive may be revised and/or superseded once the terminating corrective action for the monitoring function has been approved.

James Coyne
Delegate of the Civil Aviation Safety Authority

1 December 2006