PRIOR TO MAINTENANCE TEST FLIGHT (CONT)

WARNING TM 1-1510-225-MTF PROCEDURE TROUBLESHOOTING REFERENCE * 14. Pitot tubes (2), stall warning vane, and heated fuel vents (2) - Check as fol- lows: Use caution when checking pitot tubes, stall warn- ing vane, and heated fuel vents for heat by feel. The heating elements in these items can produce enough heat to cause burns to personnel who touch them. (a) STALL WARN heat switch - ON. (b) PITOT heat switches (2) - ON. (c) FUEL VENT heat switches (2) - (d) Left wing heated fuel vent - Check by feel for heat and condi- tion. (e) Stall warning vane - Check by feel for heat and condition. (f) Left pitot tube - Check by feel for heat, condition, and free of obstructions. (g) Right pitot tube - Check by feel for heat, condition, and free of obstructions. (h) Right wing heated fuel vent - Check by feel for heat and condi- tion. (i) STALL WARN heat switch - Off. (i) PITOT heat switches (2) - Off. (k) FURL VENT heat switches (2) - Off. 2-5 C55 C56 C33 C33