AD 2008-12-18
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Dassault | Falcon 2000EX | Airworthiness Directives; Dassault Model Falcon 2000EX Airplanes and Model Falcon 900EX Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Dassault Model Falcon 2000EX Airplanes and Model Falcon 900EX Airplanes |
Unsafe Condition
During a flight test, an air data probe failure led to identical wrong flight path vectors and vertical speeds displayed on both pilot's and co-pilot's PDU. The current wiring of the Air Data System (ADS) and IRS units is not compliant with safety objectives, leading to unnoticed and misleading flight information.
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Required Actions
Inspect and repair the integrity of the General Purpose (GP) bus and IRS2 as applicable. Modify the wiring of IRS2 and test the GP bus IRS entry per service bulletins SB-F2000EX-89 and SB-F900EX-274. Revise Chapter 5.40 of the Aircraft Maintenance Manuals to include an additional periodic functional test of the IRS GP Bus I/O.
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Compliance Time
Within 12 months of the effective date (July 23, 2008)
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Affected Aircraft
Dassault Model Falcon 2000EX airplanes, serial number 6 and 28 and subsequent; and Model Falcon 900EX airplanes, serial number 97 and 120 and subsequent, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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