The U.S. aircraft register, updated daily
Parts

Lobe Class

No failure report names the lobe class. 1 FAA approvals let 1 company make a replacement lobe class, Lucas Aerospace INC holding the most (1).

Approved replacement parts 1 parts manufacturer approvals

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

For these models most: Boeing 747 (1).

MakerPartReplacesFitsGrantedStatus
Lucas Aerospace INCAft Lower Lobe Class C Cargo Compartment All Parts Noted on MDL R36-1Modification PartBoeing 747-2001994-04-21current

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.