McFarlane Throttle Control Vernier-Assist MCVAC299505-0301 FAA-PMA Approved

McFarlane Vernier-Assist™ throttle control, manufacturer part number MCVAC299505-0301. This aircraft engine control combines normal push-pull movement for coarse throttle adjustment with knob rotation for fine adjustment.

The Vernier-Assist mechanism uses a friction-based roller action rather than a conventional threaded positive-lock arrangement. The selected setting is retained by friction while allowing controlled, precise adjustment of the throttle position.

• Manufacturer part number: MCVAC299505-0301
• Control type: Throttle control with Vernier-Assist™ fine-adjustment function
• Operation: Push or pull for coarse adjustment; rotate the knob for fine adjustment
• Approval: Source documentation identifies this part number as FAA-PMA approved
• Referenced aircraft eligibility: Cessna 177 A/B and Cessna 185 A185E
• Unit of measure: Each

Please verify part-number applicability, aircraft eligibility and installation requirements against the applicable approved maintenance data before installation.