The U.S. aircraft register, updated daily
Parts

Shroud Half

No failure report names the shroud half. 4 FAA approvals let 3 companies make a replacement shroud half, Spirit Aerosystems INC holding the most (2).

Approved replacement parts 4 parts manufacturer approvals

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

For these models most: Boeing 747 (3), Cessna 500 Citation I (1).

MakerPartReplacesFitsGrantedStatus
Gemini EngineeringSHROUD HALF ASSY 312U7840-3312U7840-3Boeing 747-400 Series, 747-400F Series2009-06-03current
Spirit Aerosystems INCSHROUD HALF ASSY 312U7840-2312U7840-2Boeing 747-400 SERIES, 747-400F SERIES2007-04-22current
Spirit Aerosystems INCSHROUD HALF ASSY 312U7840-3312U7840-3Boeing 747-400 SERIES, 747-400F SERIES2007-04-12current
United Beechcraft INCShroud Half/Air Dist. Fitting TAWS102-2Modification PartCessna 500 S/N 0214 thru 03491992-09-03current

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.