AD 2012-14-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Canada | Airworthiness Directives; Bell Helicopter Textron Canada Helicopters |
| aircraft | Bell | Helicopter Textron Canada | Airworthiness Directives; Bell Helicopter Textron Canada Helicopters |
Unsafe Condition
Loose or misaligned parts in the hydraulic servo actuators (servo), specifically the shaft, nut, or clevis assembly, which could lead to servo failure and subsequent loss of helicopter control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect all hydraulic servo actuators to determine whether the shaft turns independently of the nut or clevis assembly. Replace the servo with an airworthy one if the shaft turns independently. If the shaft does not turn independently, inspect the lock washers and either replace the servo or bend the tab of the lock washer flush against a flat surface of the nut or clevis assembly. Reidentify the servo by marking the letter 'V' after the part number on the data plate if it meets all inspection requirements.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bell Helicopter Textron Canada Model 407 helicopters with serial numbers 53000 through 53900, 53911 through 53999, and 54000 through 54081, equipped with servos part numbers 206-076-062-105 or 206-076-062-107; and Model 427 helicopters with serial numbers 56001 through 56077, 58001, and 58002, equipped with servos part numbers 206-076-062-109 or 206-076-062-111.
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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