AD 74-18-15
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Leigh Systems | Emergency Locator Transmitter | Airworthiness Directives; LEIGH SYSTEMS: Emergency Locator Transmitter Leigh Systems Sharc 7 Series. Applies to Leigh Systems Sharc 7 Series Serial Nos. 1000-24000 Emergency Locator Transmitter |
Unsafe Condition
Magnesium battery gassing and the possibility of lightning strike or static electricity buildup igniting the mixture resulting in rupture and activation of the Emergency Locator Transmitter.
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Required Actions
Disconnect the ELT antenna at the ELT electronic unit and install Leigh Systems Part No. 04 05 002 Static Electricity Suppresser in the coaxial line between the antenna and the electronic unit. Aircraft may be flown to a base for maintenance under FAR 91.52(e)(2).
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Compliance Time
within the next 90 days after the effective date of this A.D.
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Affected Aircraft
Leigh Systems Sharc 7 Series Emergency Locator Transmitter, Serial Nos. 1000-24000.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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