TM 9-2350-287-10OPERATING THE APU (continued)When operating the APU at high altitudes and/or high temperatures,continuous heavy-load demands by the electrical and hydraulic systems maycause APU engine to overheat. In these extreme conditions, the APUGENerator switch should be turned to OFF and hydraulic components shouldbe shut down periodically. Continue to run APU without load for severalminutes before again operating generator and hydraulic components.If HIGH AIR TEMPerature lamp lights during operation, turn FUEL SHUTOFFswitch to OFF. Allow APU to cool before restarting. Notify Unit maintenance iflamp lights often.8. Allow APU to warm up for three minutes, then turn APU GENerator switch (4) to ON.2-120
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