Figure 2-3. Mirror Alignment Example

9-4931-583-30&P

Install handle assemblies (case No. 5) item

NOTE

(3)

14 on TSU, loosen handle assemblies on BAGSE stand

Each alignment step, with alignment holes

and loosen knobs attaching lower frame. Remove com-

and allowable tolerance, is listed in table

plete BAGSE from stand and install frame on TSU.

2-1.

Tighten handle retainers, position lower frame retain-

ers and tighten knobs.

Four alignment blocks, left gun, right gun,

forward gun, and upper block can be ad-

justed at AVIM. All blocks on main frame

NOTE

assembly shall be adjusted at higher level

maintenance. Any failure of an alignment

Loosen azimuth retaining knobs to allow the

step will require either block adjustment or

frame to settle. Do not tighten until assem-

component replacement.

bly is to be removed from helicopter.

(2) Perform steps 1 through 6 of table 2-1. If

assembly is not within tolerance level, mainframe must

(4) Install TSU-GSE (ZO) block on TSU refer-

be shipped to depot level for maintenance.

ence pads. Tighten block screws snugly. Install mirrors

in the three positions: front Z028, right ZO1l, and left

ZO11.

NOTE

(5) Adjust slider knobs while sighting through

Helicopter Preparation: remove TSU top

tapered holes in BAGSE moveable frame forward

and side fairings. Paragraphs 3 through 11

FR28, right RW1l, and left LW1l in any convenient

are performed on the helicopter only after

sequence. (See figure 2-3). Satisfactory preliminary

initial receipt of BAGSE, or if the shelf as-

alignment is obtained when observer has adjusted

sembly reference pads are not aligned the

slider so that reflected image of tapered hole appears

same as the TSU reference pads (within 2

centered on mirror target when looking directly

mr tolerance).

through tapered hole at target. This operation centers

the BAGSE moveable frame.

Figure 2-3.

Mirror Alignment Example

2-6