Figure 2-11. Linkage assembly - use of BIT position

TM 9-1270-212-14&P

Figure 2-11. Linkage assembly - use of BIT position

2-6. HSS Operational Checks.

NOTE

In the procedures below, where the nomencla-

ture of a control, control position, or indicator

differs between the AH-lS(Mod) and the

AH-1S

helicopters, the basic nomen-

clature used is that for the AH-IS(Mod) heli-

copter and the nomenclature for the AH-1S

helicopters follows, in parentheses

and prefixed with an "or;" for example, "HS

RTCL OFF BRT (or HSS RTCL OFF BRT)"

in a(4) below.

Figure 2-12 Locatoin of pilot's connector for

helmet sight assembly cable

a. Reparation of Pilot and Gunner Helmet Sights.

connections, and actuate the HSS BIT stitch again. If the

(1) The helmet sight assembly has a cable that

failure persists, perform the corrective action given in table

terminates in an eight-pin connector. Attach this connector

3-4.

to the connector jack on the side of the seat (pilot, left

side; gunner, right side) in the same clip as the

NOTE

communications connector, as shown for the pilot in figure

2-12.

A factory replacement linkage or arm installed

in an XM136 system will probably not pass a

(2) Put on the helmet, making sure it is positioned

BIT test until after boresighting is complete.

comfortably and the chin strap is securely fastened.