AD 77-02-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Narco | Emergency Locator Transmitter Batteries | Airworthiness Directives; NARCO: Applies to all Narco Model ELT-10 77 Emergency Locator Transmitter Batteries |
Unsafe Condition
Battery corrosion results in battery lead breakage and failure of the ELT to operate.
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Required Actions
Within 90 days and each subsequent 90-day interval after the effective date, remove the control head, check for battery leakage and corrosion, verify secure battery leads, test ELT transmission, and replace batteries with those having a replacement date of November 1977 or later if corrosion is found.
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Compliance Time
Within the next 90 days and thereafter at each additional 90-day interval after the effective date of this Airworthiness Directive
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Affected Aircraft
Narco Model ELT-10 77 Emergency Locator Transmitter Batteries with a battery replacement date prior to November 1977.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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