AD 98-12-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters | AS-365N2 | Airworthiness Directives; Eurocopter France (Formerly Aerospatiale, Society Nationale Industrielle, Sud Aviation) Model SA-365N, SA-365N1, AS-365N2, and SA-366G1 Helicopters |
| aircraft | Airbus Helicopters | SA-365N | Airworthiness Directives; Eurocopter France (Formerly Aerospatiale, Society Nationale Industrielle, Sud Aviation) Model SA-365N, SA-365N1, AS-365N2, and SA-366G1 Helicopters |
| aircraft | Airbus Helicopters | SA-365N1 | Airworthiness Directives; Eurocopter France (Formerly Aerospatiale, Society Nationale Industrielle, Sud Aviation) Model SA-365N, SA-365N1, AS-365N2, and SA-366G1 Helicopters |
| aircraft | Airbus Helicopters | SA-366G1 | Airworthiness Directives; Eurocopter France (Formerly Aerospatiale, Society Nationale Industrielle, Sud Aviation) Model SA-365N, SA-365N1, AS-365N2, and SA-366G1 Helicopters |
Unsafe Condition
Cracks in the transmission deck and support beams reduce the strength of the main gearbox strut attachment and could result in failure of the main gearbox mounting, and subsequent 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 transmission deck for cracks using dye-penetrant inspection per Eurocopter France Telex Service No. 10011; repair any cracks prior to further flight. Replace transmission deck support beams with redesigned parts per Service Bulletin No. 05.00.36. Clean, prime, and paint affected areas per the referenced service documents.
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Compliance Time
For SA-365N, SA-365N1, SA-366G1: on or before 4,000 hours time-in-service (TIS) or within 50 hours TIS after the AD's effective date (July 9, 1998), whichever is later. For SA-365N2: on or before 2,000 hours TIS or within 50 hours TIS after the AD's effective date, whichever is later.
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Affected Aircraft
Eurocopter France (formerly Aerospatiale, Société Nationale Industrielle, Sud Aviation) Model SA-365N, SA-365N1, AS-365N2, and 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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