The U.S. aircraft register, updated daily
Parts

Modified Airspeed

No failure report names the modified airspeed. 1 FAA approvals let 1 company make a replacement modified airspeed, Gs Rasmussen and Associates INC holding the most (1).

Approved replacement parts 1 parts manufacturer approvals

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

For these models most: Douglas DC-8 (1).

MakerPartReplacesFitsGrantedStatus
Gs Rasmussen and Associates INCModified Airspeed Indicator Type No 104K 10401 thru 10429, 10401B...Modification PartMcDonnell Douglas DC-8-62 & -631994-10-06current

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.