AD 2012-15-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Dassault | Aviation | Airworthiness Directives; Dassault Aviation Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Dassault Aviation Airplanes |
Unsafe Condition
A passenger oxygen pipe at frame 10 was chafing against the forward lavatory rear structure, raising the risk of the oxygen pipe developing a crack. This could lead to rupture of the oxygen pipe, impairing operation of the passenger oxygen distribution system in case of cabin depressurization.
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Required Actions
Within 2 months after the effective date, perform a boroscope inspection of the oxygen pipe for clearance and a general visual inspection for damage. If damage is found or clearance is less than 3 mm, modify the oxygen pipe routing before further flight, including a general visual inspection for chafing and applicable replacements. If clearance is 3 mm or more but less than 12 mm, modify the oxygen pipe routing within 98 months or 4,000 flight cycles, whichever occurs first.
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Compliance Time
Within 2 months after the effective date for initial inspection; before further flight for corrective actions if damage or clearance less than 3 mm is found; within 98 months or 4,000 flight cycles for oxygen pipe routing modification if clearance is 3 mm or more but less than 12 mm.
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Affected Aircraft
Dassault Aviation Model FALCON 7X airplanes, certificated in any category, with serial numbers 3, 10, 13, 18, 19, 20, 22, 23, 24, 26, 27, 29, 30, 31, 32, 33, 35, 36, 38, 41, 42, 43, 47, 48, 58, 63, 64, 66, 67, 68, 71, 76, 78, 79, 83, 84, 85, 86, 87, and 93, except for airplanes on which the Dassault Aviation modification specified in Dassault Mandatory Service Bulletin 7X-174 has been incorporated.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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