The U.S. aircraft register, updated daily
Parts

Gas Tank

No failure report names the gas tank. 2 FAA approvals let 2 companies make a replacement gas tank, Mono Aircraft INC holding the most (1).

Approved replacement parts 2 parts manufacturer approvals

A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a gas tank and sell it as an approved part for the models named. These are the companies holding such approvals for a gas tank:

For these models most: Piper J-3 Cub (1), Monocoupe 90 (1), Monocoupe 110 (1).

MakerPartReplacesFitsGrantedStatus
Aero Fabricators INCGas Tank Straps E-462-000Piper 70462-00, 70451-03, 70472-00, 70451-02Piper J3C-40, J3C-50, J3C-50S1998-03-08current
Mono Aircraft INCGas Tank Hold Down Assembly 263Monocoupe Gas Tank Hold Down Assembly 263Monocoupe Corporation 90, 90A, 110 Special1992-01-07current

Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.