BEFORE TAXIING

TM 1-1510-225-MTF PROCEDURE TROUBLESHOOTING REFERENCE NOTE Illumination of the AP FAIL annunciator other than during initial power-up indicates a failure. This failure annunciation will result in power being removed from the roll, pitch, yaw, pitch trim, and rudder trim servos. The flight director may remain functional depending upon the nature of the failure. The continuous self-test feature may also inhibit flight director, autopilot, and electric trim use without illumination of the AP FAIL annunciator. 20. Engine instruments - Check. BEFORE TAXIING 1. CABIN signs - As required. 2. BLEED AIR VALVES - As required. 3. CABIN TEMP MODE - Set. 4. AFT BLOWER - As required. 5. Avionics - Check and set. 6. HSI failure warning system - Check. 7. Cockpit voice recorder - Check (Chap- ter 4). 8. Radar - As required 9. Standby horizon - TEST, ON, and uncaged. 10. Altimeters - Set and check. 11. ADI warning flags - Check, all flags masked 12. Flaps - Check. 13. EFIS brightness - Set. 2-25