AD 2007-26-13
Unsafe Condition
Erosion sheath separation leading to damage of the airplane.
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Required Actions
Overhaul all installed propeller blades within 30 days after the effective date. Perform initial and repetitive visual inspections of affected propeller blades. Remove propeller blades with damaged erosion sheath bonding or loose erosion sheaths and install missing or damaged polyurethane protective strips.
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Compliance Time
Within 30 days after the effective date of this AD.
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Affected Aircraft
MT-Propeller Entwicklung GmbH propellers, models MT, MTV-1, MTV-3, MTV-5, MTV-6, MTV-7, MTV-9, MTV-11, MTV-12, MTV-14, MTV-15, MTV-18, and MTV-21, manufactured before 1995, which have not been overhauled since April 1994. These propellers may be installed on various aircraft models including Apex ATL, Apex DR400, EADS Socata Rallye, Extra EA-300, Piper PA-46, Rene Fournier RF4, Sukhoi SU-26, SU-29, SU-31, Yakovlev YAK-52, YAK-54, YAK-55, and Technoavia SM-92.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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