AD 98-05-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters | SA-366G1 | Airworthiness Directives; Eurocopter France Model SA-366G1 Helicopters |
Unsafe Condition
Disbonding of the metal center section of the main rotor head frequency adapter from the elastomer due to lack of adherence during production, which could cause vibrations leading to loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the main rotor head frequency adapter to determine its part number, serial number, and date of manufacture. If the adapter is part number 704A33-640-031 (E1T2624-01A) or 365A31-1858-01 (manufactured before April 1, 1991, with serial number ≤8188), or part number 704A33-640-046 (E1T3023-01) or 365A31-1858-02 (manufactured before April 1, 1991, with serial number ≤3122), remove and discard it, then replace with an airworthy frequency adapter before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 100 hours time-in-service or 6 months after the effective date of this AD, whichever occurs first, unless accomplished previously
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Eurocopter France Model SA-366G1 helicopters, certificated in any category
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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