AD 99-05-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters | SA.315B Alouette III | Airworthiness Directives; Eurocopter France Model SA. 315B, SA. 316B, SA. 316C, SA. 319B, and SE. 3160 Helicopters |
| aircraft | Airbus Helicopters | SA.316B Alouette III | Airworthiness Directives; Eurocopter France Model SA. 315B, SA. 316B, SA. 316C, SA. 319B, and SE. 3160 Helicopters |
| aircraft | Airbus Helicopters | SA.316C Alouette III | Airworthiness Directives; Eurocopter France Model SA. 315B, SA. 316B, SA. 316C, SA. 319B, and SE. 3160 Helicopters |
| aircraft | Airbus Helicopters | SA.319B Alouette III | Airworthiness Directives; Eurocopter France Model SA. 315B, SA. 316B, SA. 316C, SA. 319B, and SE. 3160 Helicopters |
| aircraft | Airbus Helicopters | SE.3160 Alouette III | Airworthiness Directives; Eurocopter France Model SA. 315B, SA. 316B, SA. 316C, SA. 319B, and SE. 3160 Helicopters |
Unsafe Condition
Failure of a main rotor blade cuff attachment fitting at a bolt hole location, leading to loss of a blade 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 both upper and lower blade surfaces of each blade cuff for cracks using a 10-power or higher magnifying glass after cleaning with a mild liquid detergent or equivalent. If a crack is suspected, remove paint, clean with Naptha-type solvent, conduct dye penetrant inspection with isolated area using self-adhesive aluminum tape. Remove and replace the blade if a crack is detected.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
For blades with less than 400 hours time-in-service (TIS), required prior to the accumulation of 400 hours TIS, and thereafter at intervals not to exceed 400 hours TIS; or for blades with 400 hours or more TIS, required within 50 hours TIS or 30 calendar days after the effective date of this AD, whichever occurs first, and thereafter at intervals not to exceed 400 hours TIS.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Eurocopter France Model SA. 315B, SA. 316B, SA. 316C, SA. 319B, and SE. 3160 helicopters with main rotor blade part numbers 3160S.11.10.000, 3160S.11.30.000, 3160S.11.35.000, 3160S.11.40.000, 3160S.11.45.000, 3160S.11.50.000, or 3160S.11.55.000 installed.
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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