Display of which warning light may indicate a fire hazard due to a bleed air leak?

Display of which warning light may indicate a fire hazard due to a bleed air leak?

• A. Fuel Low Pressure
• B. Engine Fire
• C. Hydraulic Pressure
• D. Heater O/Heat

Answer: (D)

Bleed air is used to heat the helicopter and for other systems; if a bleed air leak occurs, the air can escape into areas it shouldn’t, getting extremely hot and potentially igniting materials. The warning light that signals this risk is the heater overheat indicator (Heater O/Heat). When this light comes on, it points to abnormal heater temperature or a fault in the heater/ducting, which is exactly the situation where a bleed air leak could create a fire hazard. The other warnings monitor fuel pressure, engine fire, and hydraulic pressure, which don’t directly indicate a fire hazard from a bleed air leak.

Bleed air is used to heat the helicopter and for other systems; if a bleed air leak occurs, the air can escape into areas it shouldn’t, getting extremely hot and potentially igniting materials. The warning light that signals this risk is the heater overheat indicator (Heater O/Heat). When this light comes on, it points to abnormal heater temperature or a fault in the heater/ducting, which is exactly the situation where a bleed air leak could create a fire hazard. The other warnings monitor fuel pressure, engine fire, and hydraulic pressure, which don’t directly indicate a fire hazard from a bleed air leak.