AD 2011-15-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper | PA32R- 301 | Airworthiness Directives; Superior Air Parts and Lycoming Engines (Formerly Textron Lycoming) Fuel-Injected Engines |
| aircraft | Textron | Various | Airworthiness Directives; Superior Air Parts and Lycoming Engines (Formerly Textron Lycoming) Fuel-Injected Engines |
Unsafe Condition
Diaphragms produced from specific lot numbers could have stud threads that don't meet design, incomplete braze between the stud and hub, and studs made from lower temper material. Diaphragms from these lots could fail in fatigue prematurely, resulting in an in-flight engine shutdown due to a failed fuel servo diaphragm and damage to the airplane.
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Required Actions
Remove your fuel servo if AFS Diaphragm P/N AV2541801 or AV2541803 was installed at any time after May 20, 2010, as specified in AFS MSB AFS-SB6, Revision 2, dated April 6, 2011.
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Compliance Time
Within 5 flight hours after the effective date of this AD.
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Affected Aircraft
Superior Air Parts and Lycoming (formerly Textron Lycoming) fuel-injected engines with an AVStar Fuel Systems (AFS) fuel servo diaphragm, part numbers (P/Ns) AV2541801 and AV2541803, installed.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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