ONE--TIME INSPECTION OF MAST ASSEMBLY, ALL UH--1H/V AIRCRAFT, TB 1-1520-210-20-50

ONE--TIME INSPECTION OF MAST ASSEMBLY, ALL UH--1H/V AIRCRAFT, TB 1-1520-210-20-50

The following is provided for clarity: The TransmissionMast Assembly (P/N
204--040--366--15) (item 4, figure 150, TM 55--1520--210--23P--1) has a
1500--hour TBO. The data plate (item 27) for the Transmission Mast Assembly
is located on the edge of the plate assembly (item 28). The Mast
Assembly (P/N 204--011--450) (item 5) is a sub--assembly of the Transmission
Mast Assembly and has a 1500--hour retirement life. The data plate
for the Mast Assembly is affixed to the pole approximately 2 inches below
the damper mount. To avoid confusion between the TransmissionMast Assembly
(P/N 204--040--366--15) and the Mast Assembly (P/N 204--011--
450), the Mast Assembly will be referred to as the ”Mast Pole” throughout
the remainder of subject message/TB