TM 1-1520-238-10 Change 10 8-13 CAUTION If ENG START LIGHT remains illuminated after reaching 66 – 68% N_G, set ENG START switch for affected engine to IGN ORIDE, then OFF. NOTE The MASTER CAUTION and FUEL PSI ENG 1 or 2 caution light on pilot caution/ warning panel may illuminate during start. FUEL PSI ENG 1 or 2 caution light should extinguish during start of the re- spective engine. For helicopters with -701 engines, a full scale torque spike may occur during engine start. For helicopters with -701C engines, the torque spike will not occur. f. WARM ENGINE START. Less than 4 hours since last shutdown. Do not use this procedure for inflight restarts. Start proce- dures are as follows: (1) START switch – IGN OVRD until N_G reaches 18 - 20%. (2) START switch – OFF. Allow N_G to spool down below 5%. (3) START switch – START. (4) PWR lever – IDLE after N_G speed in- creases and TGT is below 80 C. g. Caution/warning lights – Check. NOTE The second engine may be started with the RTR BK switch set to LOCK, as desired or required. Do not advance either PWR lever to FLY until RTR BK switch is OFF. L4. Second engine – Start same as step 3, above. 5. RTR BK switch – OFF. CAUTION Prior to advancing PWR levers, ensure both engines are stabilized (N_p, N_G, torque, and oil pressure). While advanc- ing PWR levers to FLY, ensure both en- gines indicate a torque rise to confirm that the input drive clutches are en- gaged. If an engine near 0% torque, pro- ceed with emergency procedure for input drive clutch malfunction. 6. PWR levers – FLY. Advance both PWR levers smoothly to FLY and ensure both torques in- crease simultaneously. ^7. Np and N_r – 100%. 8. Caution/warning lights – Check. 9. ANTI-ICE panel/ENG INLET switch – As re- quired. 10. APU control switch – OFF. *8.21. BEFORE TAXI CHECK. 1. Armament and pylon safety pins – Removed. 2. Chocks and external ICS cords – Removed and disconnected. 3. HARS control switch – Check aligned then ad- vance to OPR. 4. DASE – As desired. NOTE HIT/ANTI-ICE checks while operating in adverse conditions (e.g., dust, desert, coastal beach area, dry river beds) may be deferred (maximum 5 flight hours) at the discretion of the pilot in command un- til a suitable location is reached. In sandy or dusty conditions, it is advis- able to perform the HIT check while air- borne. 5. HIT check – As required. Perform for first flight of day. Refer to HIT log in aircraft logbook. This step may be performed at any time prior to take- off.