Goodrich Wheel & Brake PTFE Backup Ring 68-1389 OEM Replacement Helicopter Accessory Designed with both style and

Designed with both style and function in mind

Fair chemical resistance

it is permanent - if your license is lost or your email changes

Rolling Circles

allowing slight expansion

Goodrich Wheel & Brake PTFE Backup Ring 68-1389 OEM Replacement Helicopter Accessory Designed with both style andThe Goodrich Wheel & Brake 68 1389 is a PTFE backup ring intended for aircraft brake assembly hydraulic sealing applications. Manufactured in the United States under CAGE code 97153, this backup ring is an OEM replacement component that is 8130 3 eligible for use in FAA regulated maintenance programs. ECCN classification is 9A991. d. PTFE backup rings are used in aircraft brake hydraulic systems to support O ring seals and prevent seal extrusion under