The U.S. aircraft register, updated daily
Parts

Boot Street

No failure report names the boot street. 6 FAA approvals let 1 company make a replacement boot street, Flexfab INC holding the most (6).

Approved replacement parts 6 parts manufacturer approvals

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

For these models most: Boeing 747 (6).

MakerPartReplacesFitsGrantedStatus
Flexfab INCBoot Assembly Street Ducting Pneumatic System BOE200960B90107-3Boeing 747-100, -2001993-07-19current
Flexfab INCBoot Assembly Street Ducting Pneumatic System BOE201060B90107-4Boeing 747-100, -200, -3001993-07-19current
Flexfab INCBoot Assembly Street Ducting Pneumatic System BOE200760B90107-1Boeing 747-100, -200, -3001993-07-19current
Flexfab INCBoot Assembly Street Ducting Pneumatic System BOE209160B90107-6Boeing 747-100, -2001993-07-19current
Flexfab INCBoot Assembly Street Ducting Pneumatic System BOE201160B90107-5Boeing 747-100, -200, -3001993-07-19current
Flexfab INCBoot Assembly Street Ducting Pneumatic System BOE200860B90107-2Boeing 747-100, -200, -3001993-07-19current

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.