2-306.6 Change 4TM 9-2350-267-20GCheck operation of engine AFES T/A panel overheat and fire detectioncircuits as follows:1. Reduce potentiometer setting to 5.0 k.NOTEThe red FIRE lamps on the engine AFES T/A panel and theRSI panel in the crew compartment should begin to blinkon and off.2. Observe red FIRE lamps on the engine AFES T/A paneland RSI panel.3. Reduce potentiometer setting to 1.0 k.4. Observe red fire lamps on the engine AFES T/A panel andon the RSI panel.If the FIRE lamps stay on without blinking and the AUTO FEXT LED’S on theengine AFES T/A panel illuminate, repair or replace wire harness 12352354(p 14-50.5). Re-adjust the potentiometer knob to its maximum setting (10kohms) and press the RESET button on the test box. Verify problem is solved.If the FIRE lamps do not stay on and the AUTO FEXT LED’s do notilluminate, replace engine AFES T/A panel (p 14-39). Re-adjust the potenti-ometer knob to its maximum setting (10 kohms) and press the RESET buttonon the test box. Verify problem is solved.
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