The U.S. aircraft register, updated daily
Parts

Dfdr

No failure report names the dfdr. 2 FAA approvals let 1 company make a replacement dfdr, Gulfstream Aerospace LP 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 dfdr and sell it as an approved part for the models named. These are the companies holding such approvals for a dfdr:

For these models most: Israel Aircraft Industries GALAXY (2).

MakerPartReplacesFitsGrantedStatus
Gulfstream Aerospace LPDFDR Assembly 4AS9801504-501IAI 4AS9801504-501Gulfstream Galaxy2003-01-21current
Gulfstream Aerospace LPDFDR Assembly 4AS9801504-503IAI 4AS9801504-503Gulfstream Galaxy2003-01-21current

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.