TM 55-1520-240-T15-5.5.1 ENGINE HYDRAULIC STARTING SYSTEM OPERATIONAL CHECK15-5.5.1INITIAL SETUPEquipment Condition:Applicable Configurations:TM 55-1520-240-23:With 74Battery ConnectedElectrical Power OnTools:Hydraulic Power OnNoneIgnition Switch Off (Key Removed)Materials:General Safety Instructions:NonePersonnel Required:WARNINGMedium Helicopter Repairer (2)References:Make sure that rotor blades are clear ofTM 55-1520-240-23obstructions and that personnel areaware that rotor blades may turn dur-ing engine motoring. Turning bladescan cause damage or serious injury topersonnel.TASKRESULT1.Check that ENGINE NO. 1 START & IGN circuit If START & IGN circuit breaker (1) is open, close it. If itbreaker (1) is closed. opens again, go to task 4-10.4.2.Check that ENGINE NO. 2 START & IGN circuit If START & IGN circuit breaker (2) is open, close it. If itbreaker (2) is closed. opens again, go to task 4-10.4.3.Check that ENGINE NO. 1 and ENGINE NO. 2 PRI If PRI CONT circuit breakers (3) and (4) are closed, openCONT circuit breakers (3) and (4) are opened.them.4.Check that ENGINE NO. 1 and ENGINE NO. 2 REVIF REV CONT circuit breakers (5) and (6) are closed,CONT circuit breakers (5) and (6) are opened.open them.MOTOR NO. 1 ENGINE5.On the FADEC panel, set and hold ENG STARTThe NO. 1 ENGINE N1 tachometer (8) must indicate 10toswitch (7) to 1.15%N1as starter motors engine. If the engine does notmotor, go to task 15-5.6.1.6.Release the ENG START switch (7) to its center The NO. 1 ENGINE N1 tachometer (8) indication mustposition. decrease to 0%N1. If the tachometer indication does notdecrease or the engine continues to motor, go to task15-5.7.GO TO NEXT PAGE15-96.2 Change 23
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
