The U.S. aircraft register, updated daily
Parts

Lumbar

No failure report names the lumbar. 7 FAA approvals let 3 companies make a replacement lumbar, Wencor LLC (Formerly Dixie Aerospace LLC) holding the most (4).

Approved replacement parts 7 parts manufacturer approvals

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

For these models most: Mcdonnell Douglas DC-9 (6), Mcdonnell Douglas Aircraft Co MD-88 (6), Douglas DC-9 (6).

MakerPartReplacesFitsGrantedStatus
Wencor LLC (Formerly Dixie Aerospace LLC)Lumbar, Back ME43249-3B/E Aerospace P/N 43249003McDonnell Douglas DC-9-81, (MD-81), DC-9-822011-04-21current
Wencor LLC (Formerly Dixie Aerospace LLC)Lumbar, Back ME43249-1B/E Aerospace P/N 43249001McDonnell Douglas DC-9-81, (MD-81), DC-9-822011-04-21current
Wencor LLC (Formerly Dixie Aerospace LLC)Lumbar, Back ME43249-3B/E Aerospace P/N 43249003McDonnell Douglas DC-9-81, (MD-81), DC-9-822011-04-21current
Wencor LLC (Formerly Dixie Aerospace LLC)Lumbar, Back ME43249-1B/E Aerospace P/N 43249001McDonnell Douglas DC-9-81, (MD-81), DC-9-822011-04-21current
Mei/Display WorksLumbar, Back ME43249-3B/E Aerospace 43249003McDonnell Douglas DC-9-81, (MD-81), DC-9-822004-01-26current
Mei/Display WorksLumbar, Back ME43249-1B/E Aerospace 43249001McDonnell Douglas DC-9-81, (MD-81), DC-9-822004-01-26current
Aircraft Interior Design INCLumbar, Back 37102-1Fairchild-Burns 42647101, 42647105Boeing B727 series, B737 series2000-11-21current

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.