42
Chapter 3: Helmet Maintenance
3-4 9 Replacement of Visor
Parts Required
Visor, MBU-12/P:
Clear (
81D5189-3
); or Neutral (
81D5189-4
);
or
Visor, MBU-20/P: Clear (
89D7697-1
); or Neutral (
89D7697-2
)
or
Visor, High-Speed: Clear (
04D11873-1
): or Neutral (
04D11873-3
)
Tools/Materials Required
None
Procedure
1. Unsnap the existing visor from the helmet from
back to front
.
2. Snap the replacement visor to the helmet (
). Fasten each snap from
front to
back
. Adjust each visor strap for a snug fit to the helmet.
3. Test visor operation as described in Paragraph 2-2.3.
Figure 3-14. Installing Visor
Edgeroll cover
Plastic spacer
MBU-12/P or MBU-20/P Visor and Helmet
High-Speed Visor and Helmet
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
3-14. 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
