The U.S. aircraft register, updated daily
Parts

Dual Power

No failure report names the dual power. 2 FAA approvals let 2 companies make a replacement dual power, Tactair Fluid Controls INC holding the most (1).

Approved replacement parts 2 parts manufacturer approvals

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

For these models most: Gulfstream G-V Gulfstream V (1), Gulfstream G-1159 Gulfstream II and III (1), Douglas DC-8 (1).

MakerPartReplacesFitsGrantedStatus
Tactair Fluid Controls INCDual Power Brake Valve HP960700-9Gulfstream 1159SCH528-9Gulfstream G-159, G-1159, G-1159A G- IV2007-07-25current
Honeywell International US LLCDual Power Brake Valve 3053230-0-1McDonnell Douglas 3053230-0-1McDonnell Douglas DC-8, Series all, DC-8 Series1997-02-17current

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.