AD 2012-22-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Various | Airworthiness Directives; Bell Helicopter Textron Helicopters |
| aircraft | Bell | Helicopter Textron | Airworthiness Directives; Bell Helicopter Textron Helicopters |
Unsafe Condition
A cracked collective lever, which could result in failure of the collective lever 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
Within 25 hours time-in-service (TIS) or 30 days, whichever occurs first, and thereafter at intervals not to exceed 100 hours TIS: (1) Clean the collective lever using cleaning compound (C-318) or equivalent. (2) Inspect the collective lever using a 10X or higher power magnifying glass in the areas shown in the applicable Bell Helicopter Textron Alert Service Bulletin. (3) If there is a crack in the paint, remove the collective lever from the swashplate assembly, remove paint and primer around the crack, and perform a fluorescent penetrant inspection. (4) If there is a crack in the collective lever, replace it with an airworthy collective lever before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 25 hours time-in-service (TIS) or 30 days, whichever occurs first, and thereafter at intervals not to exceed 100 hours TIS.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bell Helicopter Textron Model 412 and 412EP helicopters, serial numbers (S/N) 33001 through 33213, 34001 through 34036, and 36001 and higher; and Model 412CF helicopters, S/N 46400 and higher, with a collective lever part number (P/N) 412-010-408-101 installed, 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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