The U.S. aircraft register, updated daily
Parts

Extruded Cap

No failure report names the extruded cap. 2 FAA approvals let 1 company make a replacement extruded cap, Air Cargo Carriers INC holding the most (2).

Approved replacement parts 2 parts manufacturer approvals

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

MakerPartReplacesFitsGrantedStatus
Air Cargo Carriers INCExtruded Cap ELB16NA14C0456VModification PartHawker Beechcraft King Air B3002010-06-14current
Air Cargo Carriers INCExtruded Cap ELB16NA14C0440Modification PartHawker Beechcraft King Air B3002010-06-14current

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.