TM 1-1520-240-102-13-2 a.Electroluminescent Panel. Three panels whichform an equilateral triangle are aft of the forward pylon.Two panels are on top of the aft pylon aft of the anticolli-sion light. Power to operate and control the electrolumi-nescent formation lights is supplied by the LIGHTINGFORM circuit breaker on the No. 1 PDP.b.NVG Formation Lights. There is an NVG forma-tion light on each side of the forward pylon, two NVGformation lights on each side of the fuselage, two NVGformation lights on the aft pylon, one aft of the anticolli-sion light, and one on the vertical panel at the rear of theaft pylon. Power to operate and control the NVG forma-tion lights is supplied by the No. 1 DC bus through theLIGHTING NVG FORM circuit breaker on the No. 1 PDP.2-13-4. FORM Light Switches.The FORM (formation) light select and control switchesare located on the EXT LTG panel on the left side of theoverhead switch panel (fig. 2-1-10).a.FORM Light Select Switch. A two-position toggleswitch labeled NVG and NORM. In the NORM position,the five electroluminescent panels may be controlled bythe FORM light rotary control switch for normal nightformation operations. In the NVG position, the eight NVGformation lights may be controlled by the FORM lightrotary control switch for the NVG night formation opera-tion.b.FORM Light Control Switch. A rotary controlswitch labeled OFF, DIM, and BRT with three evenlyspaced incremental markings between DIM and BRT. Itadjusts the intensity of the formation lights selected bythe FORM light select switch. When the rotary controlswitch is OFF, the formation light system is deenergized.2-13-5. Anticollision Lights.Two red strobe anticollision lights are on the helicopter (3and 7, fig. 2-13-1). One is on top of the aft pylon and theother is on the fuselage underside. Power to operate theanticollision lights is supplied by the No. 2 DC busthrough the LIGHTING ANTI COL TOP and BOT circuitbreakers on the No. 2 PDP.2-13-6. ANTI COL Light Switches.Two ANTI COL TOP and BOT toggle switches are on theEXT LTG panel on the left side of the overhead switchpanel (fig. 2-1-10). Each two-position switch is labeledOFF and ON. When the anticollision light switch is ON,the lights are energized. When the switch is placed toOFF, the anticollision lights are deenergized.Two controllable searchlights are mounted on the bottom ofthe fuselage (8, fig. 2-13-1). One is controlled from the pilotTHRUST CONT lever and the other from the copilotTHRUST CONT lever. One seachlight, either pilot or copilotis equipped with an infrared (IR) filter for NVG operations.Each light is operated independently by a SRCHLTCONTR switch, SLT-FIL (searchlight filament), and posi-tion switch. They may be extended and stopped at anyangle up to 90_in a vertical plane and rotated 360_aboutits vertical axis as long as the searchlight position switchis displaced.2-13-7. SRCHLT CONTR Switch.Two SRCHLT CONTR (searchlight control) switches areon the overhead switch panel (fig. 2-13-2). The PLTSRCHLT CONTR switch is on the PLT LTG panel. TheCPLT SRCHLT CONTR switch is on the CPLT LTG pan-el. each two-position switch is labeled RET and ON.When the SRCHLT CONTR switch is placed to ON, theSTL-FIL switch on the THRUST CONTR lever becomesoperational. If the searchlight is at any angle off centerwhen the SRCHLT CONTR switch is placed to RET, thesearchlight will automatically rotate to point forward andthen will retract flush with the fuselage. Power is suppliedby the No. 1 and No. 2 DC bus through the LIGHTING SLTCONT circuit breakers on the No.1 and No. 2 PDP.2-13-8. SLT-FIL Switch.CAUTIONThe IR searchlight emits invisible infraredrays which may be hazardous to person-nel looking directly at the light at closerange or touching it. Ensure that the IRSLT-FIL switch is OFF and the light fullyretracted when it is not in use.A SLT-FIL (searchlight filament) switch is located on the pilotand copilot THRUST CONT lever switch bracket (fig. 2-5-1.)Each switch is labeled ON and OFF. The switches turn onthe landing-searchlight lamp, before or after extension. Pow-er to operate the landing searchlight lamp is supplied by theNo. 1 and No. 2 DC bus through the LIGHTING SLT FILcircuit breakers on the No. 1 and No. 2 PDP.2-13-9. SEARCH LIGHT Position Switch.CAUTIONDo not confuse the SEARCH LIGHT posi-tion switch with the two engines beep trimswitches.A five-position momentary SEARCH LIGHT switch is oneach THRUST CONTR. lever switch bracket (fig. 2-5-1). Itis labeled L (left), EXTEND, R (right), and RETRACT. Theswitch is spring-loaded to center off position.When the SRCHLT CONTR and SLT-FIL switches are ON,the searchlight can be controlled up and down or left andright with the SEARCH LIGHT position switch. Power tooperate the searchlight position switch is supplied by the No.1 and No. 2 DC bus through the LIGHTING SLT CONTcircuit breaker on the No. 1 and No. 2 PDP.
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