operation.

2-72 Change 1
Table 2-3. Caution/Advisory and Warning Light Lighting Parameters (Cont)
LEGEND ILLUMINATING PARAMETER OR FAULT
TAIL XMSN OIL TEMP  Tail gear box oil temperature is excessive. 
SAS OFF  Hydraulic pressure supplied to the SAS actuator is below minimum. 
IFF  Mode 4 is not capable of responding to interrogation. 
CHIP TAIL XMSN  Indicates a metal particle has been detected by the chip detector. 
APU FAIL  APU was automatically shut down by the electrical sequence unit. 
TR DE-ICE FAIL  Indicates a short or open in a tail rotor blade deice element. 
#2 RSVR LOW  Hydraulic .uid level has dropped below about 60% of full capacity. 
#2 FUEL LOW  Flashes when right fuel level is about 172 pounds. 
#2 FUEL PRESS  Right engine fuel pressure between engine-driven low-pressure fuel pump and high-
pressure fuel pump is low. 
#2 ENG OIL PRESS  Right engine oil pressure is too low for continued operation. 
#2 ENGINE OIL TEMP  Right engine oil temperature is above 150°C. 
CHIP #2 ENGINE  Right engine chip detector in scavenge oil system has metal chip or particle buildup. 
#2 FUEL FLTR BYPAS  Right engine fuel .lter has excessive pressure differential across .lter. 
#2 ENGINE STARTER  Right engine start circuit is actuated. 
#2 PRI SERVO PRESS  Second stage pressure is shut off, or has dropped below minimum, or servo pilot valve is 
jammed. 
#1 TAIL RTR SERVO  Pressure to the .rst stage tail rotor servo is below minimum, or servo pilot valve is 
jammed. 
APU OIL TEMP HI  APU oil temperature is above the maximum. 
TRIM FAIL  Indicates that yaw, roll, or pitch trim actuators are not responding accurately to computer 
signals. 
RT PITOT HEAT  Indicates right pitot heat element is not receiving power with PITOT HEAT switch ON. 
CHIP INPUT MDL-RH  Indicates a metal particle has been detected by the chip detector. 
CHIP ACCESS MDL-RH  Indicates a metal particle has been detected by the chip detector. 
ICE DETECTED  Indicates that ice has been detected. 
BACK-UP RSVR LOW  Hydraulic .uid level has dropped below about 60% of full capacity. 
ADVISORY LEGENDS 
#1 ENG ANTI-ICE ON  Indicates that No. 1 engine anti-ice/start bleed valve is open. 
APU ON  APU is operative. 
APU ACCUM LOW  APU accumulator pressure is low. 
#1 MFD MALF  IO code failure of MFD. 
#1 INL ANTI-ICE ON  Indicates that No. 1 engine inlet anti-icing air temperature is 93°C or above. 
APU GEN ON  APU generator output is accepted and being supplied to the helicopter. 

Table 2-3. Caution/Advisory and Warning Light Lighting Parameters (Cont)
LEGEND  ILLUMINATING PARAMETER OR FAULT 
SEARCH LT ON  Either pilot or copilot has selected SRCH LT switch is on. 
CARGO HOOK OPEN  Indicates that cargo hook load beam is not latched. 
PARKING BRAKE ON  Indicates that PARKING BRAKE handle is pulled. 
#2 INL ANTI-ICE ON  Indicates that No. 2 engine inlet anti-icing air temperature is 93°C or above. 
PRIME BOOST PMP ON  Prime boost pump switch is at PRIME or BOOST. 
LDG LT ON  Either pilot or copilot has selected LDG LT ON. 
HOOK ARMED  The cargo hook release system is armed. 
EXT PWR CONNECTED  Indicates that external power plug is connected to helicopter’s EXT POWER connector. 
#2 ENG ANTI-ICE ON  Indicates that No. 2 engine inlet anti-ice/start bleed valve is open. 
　
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