AD 2007-12-25
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Gulfstream | GIV-X | Airworthiness Directives; Gulfstream Model GIV-X, GV, and GV-SP Series Airplanes |
Unsafe Condition
Failed forward water drain/supply valves can allow ice buildup on the airplane, which could separate and strike the airplane structure aft of the failed valves, become ingested by a propulsion engine, or become a hazard to persons or property on the ground.
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Required Actions
Revise the airplane flight manuals (AFMs) to specify functional checks of forward water drain/supply valves and corrective actions if necessary. Perform repetitive functional checks of the forward water drain/supply valves for leakage. Replace any water supply valve with part number 4E4151-1 with a new, improved valve having part number 4E4491-1, or any water drain valve with part number 4E4151-3 with a new, improved valve having part number 4E4493-1.
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Compliance Time
Within 12 months of the effective date of the AD.
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Affected Aircraft
Gulfstream Model GIV-X, GV, and GV-SP series airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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