19
Chapter 2: Helmet Preparation and Operation
2-3 2 Installing Anti-Snag Receiver Spacer Kit
The anti-snag receiver spacer kit is intended for installation on helmets that already have the
standard bayonet receiver kit installed. Before you install the receivers, you must ensure that
the helmet has been properly fitted as described in Paragraphs 2-2.1, 2-2.2, and, 2-2.3; and that
the standard bayonet receiver kit has been installed as described in Paragraph 2-3.1. You will
also familiarize the aircrew member with mask attachment in this procedure.
Tools and Equipment Required
•
Pencil
•
Drill with #25 (5/32") drill bit
•
Small cross-tip screwdriver
•
Adhesive, polychloroprene MIL-A-5540, Class 3 or equivalent
•
Utility knife
•
Anti-snag bayonet receiver kit (
05A12024-1
)
Before you begin this procedure, refer to
and ensure that you have
the following components of the anti-snag
receiver spacer kit:
•
Two anti-snag spacers
•
Two 5/16" MS51957-27B screws
•
Four 1/2" MS51957-30B screws
•
Six lock washers
NOTE:
If the aircrew member has worn the
oxygen mask with a helmet other than the one
being fitted with receiver assemblies, check
the mask straps. New straps may be needed
to maintain the helmet offset measured during
helmet fitting. This allows the helmet to be
positioned correctly on the aircrew member’s
head during bayonet receiver installation.
Procedure
1. Detach both earcups from the pile fasteners inside the helmet. Position the earcups clear
of the work area.
2. If the interior screws for the bayonet receivers are not accessible, peel back both pile
fasteners from the inside of the helmet to provide access to the screws of the existing
bayonet receivers. Position the peeled-back portions clear of the work area.
(Continued on next page)
Screws, MS51957-27B
Screws, MS51957-30B
Lock washers
Anti-snag spacers
Figure 2-22. Anti-Snag Receiver Spacer Kit
