AD 2006-15-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Eurocopter | Canada Limited Model BO 105 LS A-3 | Airworthiness Directives; Eurocopter Canada Limited Model BO 105 LS A-3 Helicopters |
Unsafe Condition
Fatigue failure of fixed bolts and main rotor nuts, leading to potential loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 30 days, modify the Airworthiness Limitation section to reflect revised part numbers and life limits. Create historical records for listed parts. Review aircraft records to determine time-in-service (TIS) and landings on main rotor nuts. Before further flight, replace any nut with less than 150 hours TIS remaining before reaching its life limit. Within 150 hours TIS, replace 4 fixed bolts with new part numbers and re-identify main rotor nuts with 150 or more hours TIS remaining. Remove any life-limited part that has reached or exceeded its life limit.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 30 days for part number and life limit modifications, within 150 hours TIS for bolt replacement and nut re-identification, and before further flight for nut replacement and part removal.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Eurocopter Canada Limited Model BO 105 LS A-3 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 6, 2026
Rights: U.S. Government Public Domain
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