FIRST ENGINE START (BATTERY START)

TM 1-1510-225-MTF PROCEDURE TROUBLESHOOTING REFERENCE If the battery is partially discharged, the BATT CHG annunciator will illuminate approximately 6 seconds after external power is on line. If the annunciator does not extinguish within 5 minutes, refer to emergency procedures in TM 1-1510-225- 10. *22. Annunciator panels - Test as follows: D1-4 (a) Annunciator TEST switch - Hold depressed. Check that all annun- c i a t o r p a n e l s , e n g i n e f i r e extinguisher/detector switch- indicators, MASTER CAUTION, a n d M A S T E R W A R N I N G annunciators are illuminated, then release. (b) MASTER CAUTION and MAS- TER WARNING annunciators - Depress and release. Both annun- ciators should extinguish. FIRST ENGINE START (BATTERY START) Starting procedures are identical for both engines except the second engine generator is kept off line after the second engine start to allow performing the current limiters check. When making a battery start, the right engine should be started first. When making a ground power unit (GPU) start, the left engine should be started first due to the GPU recep- tacle being located adjacent to the right engine. Normally, only one engine is started utilizing the GPU, reverting to a battery start procedure for the second engine start. A crew- member should monitor the outside observer throughout the engine start. 1. Propeller area - Clear. 2. IGNITION AND ENGINE START A1-7 switch - ON. IGN ON annunciator should illuminate and associated 2-15