I have the painting TM from January 1971. The interior of the UH-1 was
to be painted FS 36231 with the exception of the glareshield of the
instrument panel. In my experience, the black paint on the floors did
not begin until the TWX that covered NVG changes. All of the pilot area
was then painted FS 37038. When the minimum crew for NVG operations was
changed to three (crewchief required), the rear cabin areas started to
show up in black too. I don't know if this was TM or TWX authorization
but in the units I continued to fly in only the units that had NVG
requirements painted the rear area black. This also coincided with the
start of the turn in of UH-1's to AMARC. If the aircraft was due to be
turned in soon, it never got the rear area painted.
Although the TM does not cover the subject, many UH-1A and B aircraft
had a non skid black walkway area painted on the floor between the
cabin bench seat and the forward edge of the cargo door opening. The
UH-1C did not have the black band across the floor very often. Many
UH-1D and H aircraft had a black anti-skid paint area that ran the
length of the cargo door/ jump door opening that was the width of the
outer floor panels, about 12". The most obvious conclusion for these
noted areas to have that anti-skid paint in those high traffic areas
was that the aircraft were being used in the troop transport role. If
one takes the time to review interior photos of US owned UH-1's it
seems to be an as needed application and not one of strict compliance
to a regulation.
Chief Snake