TM 55-1520-240-T 8-2.3 GAS PRODUCER TACHOMETER SYSTEM OPERATIONAL CHECK 8-2.3 INITIAL SETUP References: Applicable Configurations: TM 55-1520-240-10 All TM 55-1520-240-23 Tools: Equipment Condition: None TM 55-1520-240-23: Materials: Battery Connected None Electrical Power On Personnel Required: Hydraulic Power On Rotary Wing Aviator Visual Check of Gas Producer Tachometer System Aircraft Electrician Performed (Task 8-2.2) TASK RESULT 1. Have pilot motor NO. 1 ENGINE. (Without  74 ) No. 1 gas producer tachometer shall indicate more than 10 percent.  If it does not, but is accompanied by the sounds of a normal engine start, go to task 8-2.4.  If tachometer fluctuates or is erratic, go to task 8-2.6.  If the start attempt is not accompanied by the sound of a normal engine start, go to task 4-4.11. (With  74 ) No. 1 gas producer tachometer shall indicate a nominal reading between 10 and 15 percent.  If it does not, go to task 8-2.4.1.  If tachometer reading fluctuates or is erratic, go to task 8-2.6.1. 2. Have pilot motor NO. 2 ENGINE. (Without  74 ) No. 2 gas producer tachometer shall indicate more than 10 percent.  If it does not, but is accompanied by the sounds of a normal engine start, go to task 8-2.5.  If tachometer fluctuates or is erratic, go to task 8-2.7.  If the start attempt is not accompanied by the sound of a normal engine start, go to task 4-4.15. (With  74 ) No. 2 gas producer tachometer shall indicate a nominal reading between 10 and 15 percent.  If it does not, go to task 8-2.5.1.  If tachometer reading fluctuates or is erratic, go to task 8-2.7.1. FOLLOW-ON MAINTENANCE: TM 55-1520-240-23: Engines shut down. Hydraulic power off. Electrical power off. Battery disconnected. A65272 END OF TASK 8-32  Change 19