AD 78-17-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Mooney Aviation Company Inc | M20C | Airworthiness Directives; Mooney Model M20C, M20F, and M20J Airplanes |
| aircraft | Mooney Aviation Company Inc | M20F | Airworthiness Directives; Mooney Model M20C, M20F, and M20J Airplanes |
| aircraft | Mooney Aviation Company Inc | M20J | Airworthiness Directives; Mooney Model M20C, M20F, and M20J Airplanes |
Unsafe Condition
Failure of the Pacific Communications, Inc., Aircraft Products Division Model Alert 50, Part No. 01070-5 emergency locator transmitter (ELT) system to radiate a proper signal due to improper skin rework or inadequate resistance between the antenna and aircraft skin.
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Required Actions
Rework the aircraft skin per Mooney Service Bulletin M20-213 within ten hours operating time or 30 days from August 21, 1978. Measure resistance between antenna and skin to ensure 9,000 to 13,000 ohms. Test ELT transmission per FAA Advisory Circulars 91-44 or 20-81.
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Compliance Time
within ten hours operating time but no later than 30 days from the effective date of this AD
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Affected Aircraft
Mooney Model M20C (Serial Number 20-1186 through 20-1258), M20F (Serial Number 22-1306 through 22-1486), and M20J (Serial Number 24-0001 through 24-0454) with Pacific Communications, Inc. Model Alert 50 ELT system installed.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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