(1)
CIS MODE SEL switch -HDG.
(2)
HDG set knob on HSI -Set as desired.
(3)
Selected heading is achieved by banking helicopter, to center roll command bar.
b.
VOR Course Intercept.
(1)
Frequency -Set.
(2)
HSI CRS set knob -Set to desired course.
(3)
CIS MODE SEL switch -NAV.
(4)
Follow roll command bar to initially fol-low intercept heading and then follow com-mand bar to intercept VOR course.
c.
TACAN Course Intercept.
(1)
Channel or preset -Set.
(2)
CIS MODE SEL switch -NAV.
(3)
CRS HDG PLT/CPLT -As desired.
(4)
VTAC selector switch -TACAN.
(5)
RADIO NAV mode selector switch -VTAC.
(6)
HSI CRS set knob -Set to desired course.
d. ILS Approach.
(1)
Frequency -Set.
(2)
HSI CRS set knob -Set to desired course.
(3)
CIS MODE SEL switch -NAV.
(4)
VTAC switch -VOR/ILS.
(5)
RADIO NAV switch -ILS.
(6)
At two dots localizer deviation on HSI, fol-low roll command bar to intercept local-izer.
(7)
As glide slope deviation pointer centers, follow collective position indications for glide slope tracking.
(8)
At decision height, press GA switch for go-around mode if breakout has not occurred.
e.
Back Course Localizer Approach.
(1)
Frequencyor preset -Set.
(2)
LO altitude bug -SET to missed approach point HAT.
(3)
HSI CRS set knob -Set to inbound back course.
(4)
VTAC switch -VOR/ILS.
(5)
CIS MODE SEL switch -NAV.
(6)
MODE SEL switch -BACK CRS.
(7)
Fly same as front course (paragraph 3.19.5d). Turn off MODE SEL ALT leg-end to stow collective position indicator before making manual descent on back course approach.
3.20 STORM SCOPE WEATHER MAPPING SYS-TEM.
The storm scope, WX-1000, is a thunderstorm detection system. The system consists of an antenna, a receiver-computer, and a display screen. The receiver and antenna sections are continuously monitored by the built-in-test fea-ture for proper operation. Electrical discharges associated with a storm cell are sensed by the antenna, processed by the receiver to determine range and azimuth, and displayed on the storm scope indicator as a plus (+) symbol. Power to the storm scope is provided by the No. 2 dc primary bus through a circuit breaker marked STORM SCOPE.
3.20.1 Antennas. The stormscope antenna is mounted on the bottom of the cabin (Figure 3-1).
3.20.2 Storm scope Controls, Functions, and Dis-plays. All of the operating controls are located on the storm scope display, which is installed in the instrument panel (Figure 3-32). S1, S2, S3, and S4 selections are de-
pendent upon which screen is currently being displayed. There are nine different screen displays for the storm scope (self-test, menu, 360 degree, 120 degree, time/date, options, error message, noise monitor, and test strikes). The follow-ing controls and functions are available for the storm scope:
3.20.2.1 Main Menu. Main menu. The main menu al-lows the pilots to select between the checklist, time/date, and options modes (Figure 3-32, Main Menu). The follow-
ing controls and functions are available on the main menu:
CONTROL/ FUNCTION
LEGEND
OFF BRT Knob Turns system on/off and adjusts
screen instensity.
CHECKLIST Not functional.
TIME/DATE Access TIME/DATE menu.
OPTIONS Access OPTIONS menu.
NAVAID Toggles NAVAID mode ON or
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