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AD/F2000/29 - Generator Control Unit Wiring
Dassault Aviation Falcon 2000 Series AerDassault Aviation Falcon 2000 Series Aeroplanes
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Dassault Aviation Falcon 2000 Series Aeroplanes
| AD/F2000/29 | Generator Control Unit Wiring | 3/2008 |
|---|
| Applicability: | Falcon 2000EX aircraft from serial number 1 to 107 inclusive, which have not been modified by Dassault Aviation Falcon Service Bulletin (SB) F2000EX-141 dated16 February 2007 or Revision 1 dated 26 November 2007. |
|---|---|
| Requirement: | Modify the Generator Control Units (GCU) electrical wiring as instructed in the accomplishment instructions of SB F2000EX-141 or later EASA approved revision. |
| Note: EASA AD 2007-0290 refers. | |
| Compliance: | Within the next 13 months after the effective date of this Directive. |
| This Airworthiness Directive becomes effective on 13 March 2008. | |
| Background: | The European Aviation Safety Agency has advised that during an approach, a Falcon 2000EX operator experienced a temporary loss of the four Electronic Flight Instrumentation System (EFIS) display units followed by a consecutive restart of the avionics. During initial investigation, a loose connection on the DC load distribution system was discovered and determined to be the root cause of this event.However, further analysis indicated that large electrical transients on the essential bus bar may possibly cause simultaneous and temporary power shortage on both sides of the electrical system.This Directive requires a wiring modification of the GCUs to increase the electrical system robustness. This action is necessary to prevent a momentary loss of data on the EFIS screens, which could lead to the pilot's loss of situational awareness during initial climb or approach/landing and could possibly result in reduced control of the aeroplane. |
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Charles Lenarcic
Delegate of the Civil Aviation Safety Authority
23 January 2008