The U.S. aircraft register, updated daily
Parts

Internal Shaft

No failure report names the internal shaft. 8 FAA approvals let 3 companies make a replacement internal shaft, Gemini Engineering holding the most (5).

Approved replacement parts 8 parts manufacturer approvals

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

For these models most: Boeing 727 (8).

MakerPartReplacesFitsGrantedStatus
Eagle Air Engineering INCINTERNAL SHAFT 69-26949-169-26949-1Boeing 727-200 SERIES, 727-200F SERIES2008-10-08current
Gemini EngineeringINTERNAL SHAFT-LARGE 69-26949-369-26949-3Boeing 727-200 SERIES2004-05-24current
Gemini EngineeringINTERNAL SHAFT 69-26949-169-26949-1Boeing 727-200 SERIES, 727-200F SERIES2004-05-24current
Gemini EngineeringINTERNAL SHAFT ASSY 69-26950-969-26950-9Boeing 727-200 SERIES, 727-200F SERIES2003-03-31current
Gemini EngineeringINTERNAL SHAFT 69-26950-769-26950-7Boeing 727-200 SERIES, 727-200F SERIES2003-03-31current
Gemini EngineeringInternal Shaft-Small Universal Joint Flap Drive G69-26950- ( )Boeing 69-26950- ( )Boeing 7271996-08-22current
Texas Aero SupportInternal Shaft - Large Universal Joint, Flap Drive 1027003T-1Boeing 69-26949-1Boeing 727-100, -3001992-01-16current
Texas Aero SupportInternal Shaft-Universal Joint 1027001T-1Boeing 69-26950-1Boeing 727-2001992-01-16current

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.