4-29. Helmet Ducts.
This task covers:
a. Replace (Supply Duct)
b. Replace (Return Duct)
Wrap, Nylon Tie (Item 28, Appendix B)
RTV Sealant (Item 1, Appendix E)
Left Return Duct
Tape, Hook and Eye
Right Return Duct
Helmet liner removed (para. 4-28).
a. Replace (Supply DucO. (figure 4-31)
Remove supply duct (1), tie wraps, and connector (2).
Ensure mounting surface on inside of helmet (3) is clean.
Apply adhesive to mounting surface of connector (2) and supply duct (1).
Install connector (2), supply duct (1), and tie wrap.
Install hook and eye tape (4) to supply duct (1) and secure with adhesive.
Install helmet liner (para. 4-28).