The RAPCO RA66-109 (superseded part number RA066-30026) is a FAA-PMA approved aircraft brake lining used in Cleveland and McCauley brake assemblies, commonly installed on Cessna and similar general aviation aircraft.

This is a friction brake pad material designed to be riveted onto brake shoe assemblies. It provides the friction surface required for safe landing deceleration and ground handling braking performance. The material is formulated for consistent braking behavior, wear resistance, and stable performance under repeated heating cycles during taxi, takeoff aborts, and landings.

The RA66-109 is widely used in Cessna models such as 150, 152, 172, 182, 206, 210 series, depending on brake configuration. It is a direct replacement alternative to OEM Cleveland linings, offering a more economical FAA-approved option without changing brake system compatibility.

Each lining is typically installed using aviation solid rivets, and wear must be monitored regularly to ensure minimum thickness limits are maintained per maintenance manual.

Key features include:

RAPCO brake lining part: RA66-109 (RA066-30026 superseded)
FAA-PMA approved replacement for Cleveland/McCauley systems
Friction material for aircraft wheel brake assemblies
Approx. 0.028 kg (28 g) per lining
Used in Cessna and other GA aircraft brake systems
Riveted installation onto brake shoe backing plate
Designed for stable friction and controlled wear rate
Heat-resistant material for repeated braking cycles
Economical alternative to OEM Cleveland brake linings
Requires periodic inspection and wear limit compliance
Common in light aircraft landing gear brake assemblies