57-20-01 CHAMPION: Applies to Model 7FC, Serial Numbers 2 to 56, Inclusive.
Compliance required at next periodic airplane inspection but not later than November 15, 1958.
To prevent the entry of fire and fumes into the cabin compartment in the event of a powerplant fire, install Champion fireproof steering link boot assembly P/N 2-1523 to the firewall with suitable fireproof screws.
(Champion Service Letter No. 31 covers this same subject.)