GNR JETT (On) Outbd Up (On) Outbd Outbd
GNR JETT (On) Both Up (On) Both Both
*Switch position makes no difference.
In the BOTH jettison sequence the outboard stores leave first followed by the inboard.
The electrical circuit interface will allow jettison of the inboard stores if only two missile launch tubes are installed on the outboard racks.
Figure 4-21. Wing Stores Jettison
4-23. Airborne Laser Tracker (ALT).
The air-borne laser tracker (Figure 4-23) is used to automatically scan the terrain, detect and lock onto a laser designated target. The ALT automatically tracks the target and when commanded, aims the telescopic sight unit to the ALT line of sight. The ALT consists of a receiver, electronics assembly, and control panel. The receiver is a barrel-shaped housing with a glass dome that contains the laserseeker, and is located in forward pylon fairIng assembly.
The electronics assembly contains the ALT plug-in mod-ules and power supply, and is located in the aircraft be-hind the receiver. The control panel (Figure 4-22) con-tains the ALT controls and indicators, and is located in the pilot’s cockpit.
MS018155
ITEM FUNCTION
MODE SWITCH OFF - TURNS ALT POWER OFF (TRACKER GIMBALS ARE FREE TO MOVE).
TEST STARTS ALT SELF-TEST.
STBY - CENTERS ALT OPTICS (ALT READY TO SCAN).
SCAN 1 - SCANS 0 TO -8.3 DEGREES ELEVATION AND 15 DEGREES AZIMUTH.
SCAN 2 - SCANS 0 TO -25 DEGREES ELEVATION AND 60 DEGREES AZIMUTH.
TRACK LAMP LIGHTS WHEN SYSTEM ACQUIRES A REFLECTED LASER SIGNAL FROM TARGET. SYSTEM MUST BE IN SCAN 1 OR SCAN 2 MODE.
REFLECTED LASER SIGNAL CODE MUST MATCH CODE SELECTED AT CODE THUMBWHEEL SWITCHES.
TRACK LAMP ALSO LIGHTS IN TEST MODE.
FAULT LAMPS RU - LIGHTS IN TEST MODE IN RECEIVER IS DEFECTIVE.
EU - LIGHTS IN TEST MODE IF ELECTRONICS ASSEMBLY IS DEFECTIVE.
GO LAMP LIGHTS IN TEST MODE IF SELF-TEST IS GOOD. LIGHTS WITH TRACK LAMP AFTER 25 SECONDS. THE GO LAMP WILL TURN OFF AGAIN AFTER 30 SECONDS.
CODE THUMB-WHEEL SWITCH
SELECTS A CODED 3 DIGIT NUMBER THAT MATCHES CODE OF TARGET’S LASER SIGNAL.
NOTE
If RU FAULT or EU FAULT lamps light in TEST mode, rotate MODE switch to STBY and back to TEST. If either lamp lights again, refer to higher category of maintenance. The TRACK lamp may light a few times in the TEST mode.
NOTE
It will take about 25 seconds until GO Iamp and TRACK lamp light. The GO Iamp goes off after about 30 seconds.
Figure 4-22. ALT Control Panel
MS018156
Figure 4-23. ALT Major Components - Helicopter Locations
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4-24. ARMAMENT – SYSTEMS CHECK.
WARNING
The following checks shall not be per-formed with TOW missiles installed. If missiles are installed TOW arming han-dle(s) will be in the full up (safed) posi-tion.
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CAUTION
Do not drive the turret to the stops while performing the armament system checks.
a. TOW built-in-test – Ensure TOW completes BIT (Only performed in STBY TOW). Check as follows:
(1) TCP – TSU/SCA/EPS/MCA indicators dis-play black on black. White on black indicates failed BIT.
(2) TCP BIT switch – Press and hold. Check for battle flags A\G\R displayed in the TSU. Pilot checks for ascend/descend arrows and pre-launch constraints box displayed in HUD.
NOTE
TOW BIT override may be accom-plished by placing ATS switch to track or by placing TCP to an armed TOW mode.
(3) TCP BIT switch – Release. BIT completed within approximately 120 seconds. Indicator moves from TEST to PWR ON at completion.
(4) Barber pole indicators – Display black on black.
(5) TCP missile status indicator displays Bar-ber poles.
b. TSU tracking – Ensure TSU moves at fast rate in LOW MAG and at slow rate in HI MAG, check as fol-lows:
(1) TSU LHG HI/LOW MAG switch – LOW MAG.
(2) SHC ATS switch – Track and check TSU fo-cus as required.
(3) SHC – Press. Check TSU full travel left, right, up, and down. SHC is released after each check to ensure TSU reticle is stationary and does not rotate.
Pilot confirms Gunner LOS on HUD indicates left, right, up, and down.
(4) SHC ATS switch – STOW.
(5) TSU LHG HI/LOW MAG switch – HI MAG.
(6) SHC ATS switch – TRK.
(7) SHC – Press to the right or left.
(8) TSU LHG action switch – Press and hold.
TSU continues moving (Motion compensation check).
(9) SHC – Release. TSU continues to move.
(10) TSU LHG action switch – Release. TSU stops.
(11) TSU LHG HI/LOW MAG switch – LOW MAG.
(12) SHC ATS switch – STOW.
c. HSS built-in-test – Check as follows:
(1) HS arm assemblies – Attach to BIT mag-nets.
(2) Test segment lights. All panels illuminate.
(3) HSS BIT switch – BIT. Test passed if Go light illuminates, failed if PLT/GNR/EIA lights illuminate.
If failed, ensure HSS arm assemblies are secure on BIT magnets, check all cable connections, and press BIT again.
NOTE
If continued failure occurs, recycle MASTER ARM switch to clear BIT fail in-dication. HSS will not function properly with BIT fail indication preset.
d. HSS to TURRET – Check. Ensure turret follows HSS reticle line of sight.
(1) HS arm assemblies – Attach to helmet. Ex-tend eyepiece over eye, adjust reticle brightness and test.
(2) TCP Mode select switch – TSU GUN.
(3) Gunner looks left or right at least 45 de-grees. TSU LHG action switch press. Reticle flashes un-til gun line is coincident with HS line of sight. LHG action switch release.
(4) TCP Mode select switch – STBY TOW.
(5) PLT ORIDE switch – ORIDE. Press cyclic action switch and repeat steps in c. above.
(6) TCP Mode select switch – TSU GUN once the TOW BIT is completed.
(7) WPN CONTR switch – Pilot.
(8) Pilot looks left or right at least 45 degrees.
Cyclic action switch press. Reticle flashes until gun line is coincident with HS line of sight. Cyclic action switch release.
(9) WPN CONTR switch – Gunner.
e. HSS to TSU and TSU to TURRET – Ensure TSU follows HSS line of sight and turret follows TSU line of sight, check as follows:
(1) Gunner’s HS reticle on a target at least 45 degrees to the left or right.
(2) SHC ATS switch – ACQ and release. Gun-ner HS reticle retracts. TSU displays target.
(3) LHG action switch – Press. GUN flag flashes until gun line is coincident with TSU, LHG action switch release, turret stows.
(4) Gunner’s HS eyepiece – Extend over eye.
WARNING
The next step arms the system. Do not press the gunner cyclic trigger.
(5) Pilot HS reticle – On a target and an-nounces Gunner target.
(6) ACQ switch – PHS and release. Gunner’s eyepiece retracts, and target is dislayed in TSU.
(7) SHC ATS switch – STOW.
f. RMS built-in-test – Ensure RMS passes a BIT, check as follows:
(1) Test switch – Press. Eight 8s and zone arm lights illuminate and then 7s appear for each LRU. Re-lease test switch.
g. HUD – Check as follows:
(1) Mode switch – Test. All symbols displayed except Stadiametric reticle.
(2) Mode switch – NORM.
(3) RKT switch – DIR then IND check FCRs.
(4) Night Filter contr – Day position (Green for day/Red for night).
h. ALT – Check as follows:
(1) Mode switch – STBY.
(2) Press to test lamps – Test.
(3) Mode switch – Test Approximately 25 sec.
GO and TRACK lights illuminate. GO light off after approximately 30 sec.
(4) Mode switch – As desired.
i. (O) FLIR – Check as follows:
(1) FCP Mode Indicator – Check POWER ON.
(2) FCP BIT Indicator – Check for black on black.
(3) POLARITY switch – As desired (White/
Black Hot)
(4) IR LEVEL control knob – Adjust approxi-mately to the 2 o’clock position.
(5) IR GAIN control – Adjust approximately to the 2 o’clock position.
(6) LHG MAG switch – NIGHT.
(7) Gunner – Check for FLIR picture, adjust LHG focus as desired, adjust IR Level and IR Gain as de-sired.
(8) LHG MAG switch – As desired.
NOTE
FLIR subsystem can be turned ON or OFF at any time without damage to the system.
NOTE
FLIR BIT is performed once automati-cally upon power up. Thereafter it is performed only when FCP OFF/ON/BIT switch is moved to BIT position and re-leased.
NOTE
If FLIR BIT indicator FPS/FMT/TSU show white, reinitiate FLIR BIT. If sec-ond BIT fails, turn system OFF, and make appropriate write-up on DA Form 2403-13-1.
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4-25. GUNNERY CHECKLIST – ENGINE RUN-UP PROCEDURE.
NOTE
Units may modify the following checks because of possible range constraints or safety reasons.
NOTE
The following procedure is only used when the helicopter has been shutdown IAW Chapter 8 and paragraph 4 -27 Engine Shutdown Cold Arming pro-cedure.
a. Wing store pins – Remove.
b. Grounding cable – Remove.
c. Ground crews – Clear.
d. ANTI-COLLISION – ON (indicates helicopter is not safe to approach).
e. TURRET STOW circuit breaker – IN.
f. WING STORE PWR circuit breaker – IN.
g. JETTISON SELECT switches – OUTBD/INBD.
h. Continue with paragraph 8-23. ENGINE RUNUP.
4-26. GUNNERY CHECKLIST – ENGINE SHUTDOWN HOT/COLD ARMING PROCE-DURES.
NOTE
Units may modify the following checks because of possible range constraints or safety reasons.
NOTE
Steps a. through k. below apply to both HOT and COLD rearming procedures.
a. JETTISON SELECT switches – OFF.
b. ANTI-COLLISION – OFF (indicates aircraft is safe to approach).
c. Ground crews – Approach aircraft.
d. Wing stores pins – Installed.
e. Grounding cable – Install.
f. TOW launcher – Missile arming lever up (if TOW missiles are installed).
g. W2P1 – Disconnected.
WARNING
Stray voltage check is required prior to loading rockets. First stray voltage check of the day does not satisfied this requirement.
h. Stray voltage – Check (if loading rockets).
(1) RMS ZONE INVENTORY selector – 6PD.
(2) MASTER ARM switch – ARMED.
(3) FCC circuit breaker – ON.
(4) RMS RATE selector – “A” position.
(5) RMS ZONE ARMING switches – ARMED.
(6) Stray voltage check – Completed.
(7) FCC circuit breaker – OFF.
(8) MASTER ARM switch – OFF.
i. RMS ZONE INVENTORY selector – As required.
j. RMS RATE selector – As desired.
k. WING STORE PWR circuit breaker – OFF.
NOTE
If performing COLD ARMING PROCE-DURES continue with paragraph 8-28 ENGINE SHUTDOWN item number 13.
SCAS POWER switch - OFF.
If performing HOT ARMING PROCE-DURES continue with step 1. below once arming/rearming is completed.
l. W2P1 – Connect.
m. TOW launcher – Missile arming lever down.
n. Grounding cable – Remove.
o. Wing stores pins – Remove.
p. Ground crew – Clear.
q. ANTI-COLLISION – ON (indicates aircraft is not safe to approach).
r. HUD PWR – STBY.
s. HSS LINKAGE – As desired.
t. LASER SAFE/TURRET DEPR LIMIT switch – As desired.
u. TUR SLEW switch – NORM.
v. MASTER ARM – STBY.
w. TCP switch – STBY TOW.
x. Throttle – 100%.
y. TURRET STOW circuit breaker – IN.
z. ADS PWR circuit breaker – IN.
aa. FCC switch – ON.
ab. WING STORE PWR circuit breaker – ON.
ac. JETTISON SELECT switches – OUTBD/INBD.
ad. HUD PWR switch – ON.
ae. FORCE TRIM switch – OFF.
af. BEFORE TAKE OFF – CHECK.
4-27. ALT – INFLIGHT PROCEDURES.
a. Pilot ALT control panel – Set as follows:
(1) CODE Thumbwheel switches – Set to as-signed code.
NOTE
Prior to moving MODE switch to SCAN 1 or SCAN 2, allow 20 seconds for ALT gyros to warm up.
(2) MODE switch – SCAN 1 for scanning 0 to -8.3 degrees elevation and15 degrees azimuth or SCAN 2 for scanning 0 to -25 degrees elevation and60 degrees azimuth.
NOTE
When the ALT locks onto your target, the TRACK lamp will light. To maintaIn lock on, keep the target forward (azi-muth: 180°, elevation: 30° up and 60° down) of your aircraft. If TRACK lamp goes off, the ALT has lost lock on. In this case, the ALT will automatically resume the scanning mode selected on the MODE switch.
b. Maneuver switch – Direction of target.
c. TRACK lamp – Verify on.
NOTE
If the ALT lock on is lost in Step (1), the TSU will move full right and down, and it may be necessary to recycle to the STOW position wIth the ACQ TRACK STOW switch before another acquisi-tion can be initiated.
d. Gunner ACQ switch – ALT position to aim TS to ALT line of sight.
Figure 4-24. Pilot Armament Circuit Breakers (Sheet 1 of 2)
CIRCUIT BREAKER FUNCTION - Applies Power to and Protects Circuit for:
REF XFMR Reference transformer.
TMS BLWR TOW missile system blower.
TURRET PWR Turret power.
HSS PWR Helmet sight subsystem power.
SECU PWR Servo electronic control unit power.
LRF PWR Laser rangefinder power.
TMS PWR TOW missile system power.
TURRET
DRIVE MOTOR Turret drive motor.
AIM-1/EXL IR laser gunsight subsystem.
GUN MOTOR