The U.S. aircraft register, updated daily
Parts

Nvis Dh

No failure report names the nvis dh. 2 FAA approvals let 1 company make a replacement nvis dh, Control Products Corporation 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 nvis dh and sell it as an approved part for the models named. These are the companies holding such approvals for a nvis dh:

For these models most: Agusta A109 (1), Agusta Spa A109 (1).

MakerPartReplacesFitsGrantedStatus
Control Products CorporationNVIS DH Indicator Cap 2001176-001Modification PartAgusta S.p.A. A109K22010-09-26current
Control Products CorporationNVIS DH Indicator Cap 2001176Modification PartAgusta A109K22008-05-20current

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.