BLEED AIR OVERHEAT (LH OR RH BLD AIR O'HEAT CAUTION LIGHT ON AND MASTER CAUTION)
NOTE
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Indicates that a malfunction has caused the bleed air leaving the respective precooler to exceed allowable temperature. This would likely occur if engine, wing and/or windshield anti-ice is on and engine power is high.
1. Throttle, Respective Engine - REDUCE (Maintain sufficient RPM greater than 70% N2, to maintain the engine anti-ice light extinguished if anti-ice is on).
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When the overheat occurs the wing anti-ice valve on the side of the overheat, if on, will automatically shutoff and cycle.
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If the annunciator will not extinguish when engine RPM is reduced, the problem is likely to be a faulty temperature sensor. Bleed temperature at lower RPM is not hot enough to trip the sensor.