Malfunction Procedures

Question 1

What is the cause and procedure for a ROTOR LOW RPM light?

Answer 1

• Rotor RPM is below normal (approximately 90%)
• Reduce collective pitch and check rotor is full open

Question 2

What is the cause and procedure for a TRANS PRESS light?

Answer 2

• Main transmission pressure is below minimum, check gauge
• Landing should be made as soon as possible

Question 3

What is the cause and procedure for a TRANS TEMP light?

Answer 3

• Main transmission oil temperature is at or above red line, check gauge
• Reducing power will help alleviate to condition
• Check transmission oil pressure
• Land as soon as possible

Question 4

What is the cause and procedure for a BATTERY RLY light?

Answer 4

• Battery will not drop off line when the battery switch is turned to OFF position
• Land as soon as possible if battery HOT light illuminates

Question 5

What is the cause and procedure for a ENG CHIP light?

Answer 5

• Metallic particles in engine oil
• Land as soon as possible

Question 6

What is the cause and procedure for a TRANS CHIP light?

Answer 6

• Metallic particles in transmission oil
• Land as soon as possible

Question 7

What is the cause and procedure for a T/R CHIP light?

Answer 7

• Metallic particles in tail rotor gear box oil
• Land as soon as possible

Question 8

What is the cause and procedure for a FUEL LOW light?

Answer 8

• Approximately 60 to 70 pounds (10 gal) of fuel remaining
• land as soon as practical
• Avoid uncoordinated flight as fuel starvation may occur

Question 9

What is the cause and procedure for a FUEL FILTER light?

Answer 9

• Airframe fuel filter clogged
• Land as soon as possible
• Clean before next flight

Question 10

What is the cause and procedure for a R/FUEL PUMP light?

Answer 10

• Right pump of duel boost pump assembly has failed
• Descend to below 6000 feet altitude if fight permits
• Land as soon as practical
• Repair pump prior to next flight

Question 11

What is the cause and procedure for a L/FUEL PUMP light?

Answer 11

• Left pump of duel boost pump assembly has failed
• Descend to below 6000 feet altitude if fight permits
• Land as soon as practical
• Repair pump prior to next flight

Question 12

What is the procedure for both fuel pump failure?

Answer 12

• Both fuel boost pumps shall be operating for normal flight conditions
• If both fuel boost pumps fail, altitude must be reduced below 6000 feet pressure altitude
• Unusable fuel may be as high as 155 pounds due to inability to transfer fuel from the forward cells
• Land as soon as possible

Question 13

What are the indications of a hydraulic failure?

Answer 13

• The first indication of hydraulic boost failure will be an increase in force for control movement; feed-back forces will be noticed as well as rate limiting
• Control motions will result in normal flight reactions in all respects, except for the increased force required for control movements

Question 14

What is the procedure for hydraulic system failure?

Answer 14

1. Reduce airspeed 70 to 80 MPH
2. Hydraulic control circuit breaker - OUT. If power not restored, push breaker IN
3. Hydraulic control switch - ON; OFF if power is not restored
4. Land as soon as practical and investigate
5. A run-on landing at 5 to 10 mph is recommended

Question 15

What is the indication for a generator failure?

Answer 15

Evidence of main generator failure will be provided by observing load-meter load

Question 16

What is the procedure for a generator failure?

Answer 16

1. Cycle generator switch - If power is not restored - switch OFF
2. Left hand fuel boost circuit breaker - Check In
3. All other electrical equipment - OFF (to conserve battery)
4. Altitude must be reduced below 6000 feet prior to battery depletion due to the inability to transfer fuel from the forward cells

Question 17

How long will the left hand fuel pump operate on the battery alone if all other systems are off?

Answer 17

The battery, when 80% charged, will operate the left hand fuel boost pump approximately 2.4 hours to transfer fuel from the forward cells and maintain the helicopter within the CG limits

Question 18

What are the symptoms of an electrical bus failure?

Answer 18

Electrical bus failure will be indicated by one or more of these conditions: smoke, odor and total electrical loss

Question 19

What is the procedure for an electrical bus failure with one or more of: smoke, odor and total electrical loss?

Answer 19

1. Battery switch - OFF
2. Generator switch - OFF
3. L/H Fuel Boost circuit breaker - Check IN
4. Fuel Valve switch - ON

Question 20

What is the procedure for and engine air start?

Answer 20

1. Reduce forward speed to desired autorotative airspeed (52 to 63 mph)
2. Generator - OFF
3. Perform a normal engine start procedure

CAUTION: Do not attempt air start above 12,000 feet - TOT rises too fast to control

Question 21

What will cause an intermittent or steady audio signal?

Answer 21

• Engine out warning system activates an intermittent audio signal (N1 < 55%)
• Low rotor warning system activates a steady audio signal (Nr < 90%)

Question 22

What should be done if engine oil pressure is below minimum or above maximum?

Answer 22

Land as soon as possible

Question 23

What should be done if engine oil pressure fluctuates but does not exceed a limit?

Answer 23

Monitor engine oil pressure and temperature, and land as soon as practical

Question 24

What should be done if engine oil temperature is high?

Answer 24

Land as soon as possible