The U.S. aircraft register, updated daily
Parts

Skin Belly

No failure report names the skin belly. 2 FAA approvals let 2 companies make a replacement skin belly, Cascade Flying Service 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 skin belly and sell it as an approved part for the models named. These are the companies holding such approvals for a skin belly:

For these models most: Thrush Aircraft Inc S-2 (1), Ayres Corporation S-2 (1), Air Tractor Inc AT-400 (1).

MakerPartReplacesFitsGrantedStatus
Cascade Aircraft Conversions LLCSkin Belly Assembly TH4300TH4300Thrush Aircraft S-2R, S-2R-R3S, -R13402006-06-27current
Cascade Flying ServiceSkin Belly PT4301Modification PartAir Tractor AT-400, -400A, -4022001-05-07current

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.