The U S Air Force issued TCTO 1L-2A-569 (Time Compliance Technical Order) requiring all 0-2A/B aircraft engine fuel lines be insulated to eliminate the heating factor which contributes to fuel vaporization. If anyone wants a copy please call or e-mail me.
We routinely install "Fire Sleeve" insulation on all engine fuel lines on all 337 and 0-2 aircraft that we restore or maintain. The proper size "Fire Sleeve" can be purchased from Spruce or other sources.
Don Nieser (0-2 and 337 parts Guy)
Commodore Aerospace Corp
405-503-4686
nieser.02.337parts@juno.com
www.02337parts.com