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