Section 3 - Warning/Caution Lights Flashcards
MR Temp Light
MR Chip Light
TR Chip Light
Note
MR Temp - Indicates excessive temperature of main rotor gearbox. See note below.
MR Chip - Indicates metallic particles in main rotor gearbox. See note below.
TR Chip - Indicates metallic particles in tail rotor gearbox. See note below.
Note - If light is accompanied by any indication of a problem such as noise, vibration, or temperature rise, land immediately.
If there is no other indication of a problem, land as soon as practical.
Break-in fuzz will occasionally activate chip lights. If no metal chips or slivers are found on detector plug, clean and reinstall (tail rotor gearbox must be refilled with new oil). Hover for at least 30 minutes. If chip light comes on again, replace gearbox before further flight.
Oil light indicates…
Indicates loss of engine power or oil pressure. Check engine tach for power loss. Check oil pressure gage and, if pressure loss is confirmed, land immediately. Continued operation without oil pressure will cause serious engine damage and engine failure may occur.
Low Fuel Light
Definition and Caution
Indicates approximately one gallon of usable fuel remain for all-aluminum fuel tanks or 1.5 gallons for bladder-style tanks. The engine will run our of fuel after approximately five minutes at cruise power for aircraft with all-aluminum tanks or ten minutes with bldder-style tanks.
Clutch Light
Definition and Note
Indicates clutch actuator circuit is on, either engaging or disengaging clutch. When switch is in the ENGAGE position, light stays on until belts are properly tensioned. Never take off before light goes out.
Note - Clutch light may come on momentarily during run-up or during flight to re-tension belts as they warm-up and stretch slightly. This is normal.
If, however, the light flickers or comes on in flight and does not go out within 10 seconds, pull CLUTCH circuit breaker and land as soon as practical. Reduce power and land immediately if there are other indications of drive system failure (be prepared to enter autorotation). Inspect drive system for a possible malfunction.
ALT Light
Definition
Indicates low voltage and possible alternator failure. Turn off nonessential electrical equipment and switch ALT off and back on after one second to reset over voltage relay.
If light stays on, land as soon as practical. Continued flight without functioning alternator can result in loss of electronic tachometer, producing a hazardous flight condition.
Brake Light
Definition/Action
Indicates rotor brake is engaged.
Release immediately in flight or before starting engine.
Starter-On Light
Definition/Caution
Indicates starter motor is engages. If light does not go out when the ignition switch is released from start position, immediately pull mixture to idle cut-off and turn master switch off.
Have starter motor serviced.
GOV OFF(If Installed)
Indicates engine RPM throttle governor is off.
Carbon Monoxide(If Installed)
Indicates elevated levels of carbon monoxide (CO) in cabin. Open nose and door vents and shut off heater. If hovering, land or transition to forward flight. If symptoms of CO poisoning (headache, drowsiness, dizziness) accompany light, land immediately.
Low RPM Horn & Caution Light
A horn and an illuminated caution light indicate that rotor RPM may be below safe limits.
To restore RPM, immediately roll throttle on, lower collective and, in forward flight, apply aft cyclic. Horn and caution light are disabled when collective is full down.
