AD 2010-19-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Canada Model 222 | Airworthiness Directives; Bell Helicopter Textron Canada Model 222, 222B, 222U, 230, and 430 Helicopters |
| aircraft | Bell | Helicopter Textron Canada Model 222 | Airworthiness Directives; Bell Helicopter Textron Canada Model 222, 222B, 222U, 230, and 430 Helicopters |
Unsafe Condition
Stress corrosion cracking in the output piston rod assembly (piston rod) of the main rotor hydraulic servo actuator, leading to potential piston rod failure and subsequent servo actuator failure. Additionally, a nonconforming grind relief was discovered on a separate piston rod, which could also lead to failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Disassemble the actuator to access the piston rod. Clean the piston rod and nut with Acetone and a nylon bristle brush. Inspect the grind relief configuration; replace the piston rod and nut if unacceptable. Visually inspect the nut and piston rod for corrosion or damage using a magnifying glass; replace parts as necessary. For corrosion on the piston rod in non-critical areas, rework by lightly buffing and cleaning. If red/orange corrosion is found, perform magnetic particle inspection for cracks and replace if found. Inspect for bare base metal and apply cadmium plating as needed. Reassemble the servo actuator and mark it with a 'B' after the serial number. Perform a hydraulic system check.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
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Affected Aircraft
Bell Helicopter Textron Canada Model 222, 222B, 222U, 230, and 430 helicopters.
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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