The U.S. aircraft register, updated daily
Parts

Doubler For

No failure report names the doubler for. 3 FAA approvals let 2 companies make a replacement doubler for, Shadin Avionics (Name Change From Shadin Company 2/28/06) holding the most (2).

Approved replacement parts 3 parts manufacturer approvals

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

For these models most: Boeing 747 (1), Airbus Helicopters MBB-BK 117 C-1 (1).

MakerPartReplacesFitsGrantedStatus
Kalitta MaintenanceLower Doubler for Ballmat 200159KM200159-3The Boeing Company 747-400F Series2017-10-26current
Shadin Avionics (Name Change From Shadin Company 2/28/06)Doubler for Bracket 543013Modification PartEurocopter Deutschland MBB-BK 117 C-1, MBB-BK 117 B-11999-01-07current
Shadin Avionics (Name Change From Shadin Company 2/28/06)Doubler for Bracket 543013 DWG 4005-182 Rev....Modification PartEurocopter Deutschland MBB-BK 117 B-l1995-06-14current

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.