The U.S. aircraft register, updated daily
Parts

Pin Main

No failure report names the pin main. 2 FAA approvals let 2 companies make a replacement pin main, Deluca of California 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 pin main and sell it as an approved part for the models named. These are the companies holding such approvals for a pin main:

For these models most: Navion NAVION B (1), Md Helicopters Inc 600 (1), Md Helicopters Inc 500 (1), Md Helicopters Inc 369 (1), Hughes 369 500 series helicopters (1).

MakerPartReplacesFitsGrantedStatus
AerometalsPin Main Rotor Blade Attach 369X1004-5369A1004-5MD Helicopters, Inc. MDHI) (369A, 369HE, 369HS2007-07-02current
Deluca of California INCPin-Main Landing Gear, Trunion 143-33151-4DOC143-33151-4Navion Aircraft Navion (L-17A), Navion A (L-17B and...2000-12-06current

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.