13
Chapter 2: Helmet Preparation and Operation
17.
Check the overall fit; the helmet should be
snug, yet comfortable. Attempt to rock the
helmet back and forth on the head; the
helmet should not move.
If the fit is correct, go to Step 18.
If the helmet moves, it may be too loose.
Obtain a smaller size and return to Step 1
18. If not already done, snap the visor to the
). Fasten each snap
from front to back. Adjust the visor for a
snug fit to the helmet.
19. Referring to
, operate the
visor as follows:
a. Grasp the visor in the center and pull
it slightly away from the helmet.
b. Move the visor up or down. When the
visor is up, ensure that its top edge is
against the two bump stops.
c. Adjust the visor straps to center the
visor over the nose. Ensure that
the visor is snug enough; it should
not slide freely up and down. There
should be enough resistance to
require pulling the visor away from the
helmet to raise or lower it.
NOTE:
When the visor is up, you can
attach the visor cover. Press the hook
fasteners on the cover to the pile fastener
on the visor.
(Continued on next page)
VISOR COVER
INSTALLATION
Cover
Bump stop
(both sides)
Strap
(both sides)
Figure 2-10. Installing Visor
Figure 2-11. Operating Visor
If the pilot wears a high-speed helmet
(which includes an installed edgeroll
cover), use ONLY a high-speed visor
(which includes plastic spacers near
the straps); see Figure 2-10. Use of any
other visor type will not provide 600-
knot capability and may cause a loss of
the visor or the helmet during ejection.
MBU-12/P or
MBU-20/P Visor
and Helmet
Edgeroll cover
Plastic spacer
High-Speed Visor
and Helmet
