55-06-01 TWIN NAVION: Applies to All Dauby, Riley and TEMCO Twin Navion Conversions.
Compliance required not later than May 1, 1955.
In order to avoid the hazard of fuel and fumes entering the passenger compartment, it is necessary to install vented and drained fuel and fumeproof enclosures for all fuel tanks located in the fuselage. (Ref. CAR 3.442 (c).)
TEMCO Aircraft Corp. Twin Navion conversion Service Bulletin No. 2 covers this same subject and kits approved by the FAA for accomplishing the necessary alteration are available from TEMCO.