C4602 Discuss Items

Question 1

AFCS Failure

Answer 1

Indications:
1. Steady illumination of the FCS OFF caution light.

1. STAB button — Off.
2. FCS circuit breaker — Pull.
3. Establish VMC.

Question 2

Hydraulic System Failure

Answer 2

Indications:

1. HYDRAULIC PRESSURE caution light.
2. Increased force required for control movement.
3. Feedback in control.

1. Airspeed — Adjust (to obtain most comfortable
control movement level).
2. HYDRAULIC BOOST switch — Check ON.
3. HYD BOOST circuit breaker — Pull.
If system is restored:
4. Land as soon as practicable.
If system is not restored:
5. HYD BOOST circuit breaker — In.
6. HYDRAULIC BOOST switch — OFF.
7. FORCE TRIM (FT) — ON.
8. -C- FCS STAB — ON.
9. -C- ALT — OFF.
10. Land as soon as practicable.

Question 3

Hydraulic Power Cylinder Malfunction

Answer 3

Indications:
1. Cyclic/collective control displaces to abnormal
position.
2. Pilot control of cyclic/collective is difficult or
impossible.

*1. HYDRAULIC BOOST switch — OFF.

Hydraulic system will not secure if HYD BOOST
circuit breaker is out and the pilot will be unable
to maintain control of the aircraft.
*2. Helicopter — Regain control.
*3. Airspeed — Adjust (to obtain most comfortable
control movement level).
*4. Land as soon as possible.

In the event of a complete loss of electrical
power -B- or a loss of electrical power to
the ESS No. 2 bus (e.g., failure of the Main
Generator and Main Battery), -C- , the hydraulic
system will reenergize in the malfunction mode.
The pilot will be unable to override the hydraulic
boost solenoid.

Question 4

Transmission Chip

Answer 4

Indications:
1. “TRANS CHIP” and “CLEAR CHIP” caution lights.

First TRANS CHIP caution light:
*1. Check for secondary indications.
If secondary indications exist:
*2. Transmission Malfunction Procedure – Perform.
If no secondary indicationsexist:
*3. Press CLEAR CHIP.
If TRANS CHIP caution light remains illuminated:
*4. Transmission Malfunction Procedure — Perform.
If TRANS CHIP light extinguishes:
*5. Note the time and continue flight.
Second TRANS CHIP caution light.
If within 30 minutes of the first:
*6. Transmission Malfunction Procedure — Perform.
If more than 30 minutes have elapsed since the first
TRANS CHIP caution light:
*7. Proceed as with the first TRANS CHIP caution
light.
Any subsequent TRANS CHIP caution light within 50
hours of the first:
*8. Transmission Malfunction Procedure — Perform.

Question 5

Sprag Clutch Slippage

Answer 5

Indications:
When the twist grip is increased to full open, the pilot
may experience the following:
1. Nf
indication higher than Nr.
2. Low torque indication.
3. Ng and TOT indications lower than normal and not
responsive to collective.

*1. Autorotate.
*2. Twist grip — FLT IDLE.
If time and altitude permit:
*3. Twist grip — Smoothly rotate to full open.
If Nf/Nr are married:
*4. Collective — Increase.
Note

Multiple attempts to reengage the sprag clutch
are permitted dependent on time and altitude.
If sprag clutch continues to slip:
*5. Autorotate.
*6. Twist grip — Closed.
If the sprag clutch reengages:
*7. Land as soon as possible.

After completing the autorotative landing, ensure
the twist grip is secured. Failure to do so may
result in sudden reengagement of the sprag
clutch, causing severe damage to the drive
system.

Question 6

Post Refuel/Hot-seat Checklist

Answer 6

Hot Refuel Checklist

1. Searchlight/landing light-As required.
2. Twist grip-FLT IDLE
3. (C) STAB-OFF
4. Crew/passengers-Disembark.
5. Monitor radio and make no transmission except in an emergency when the fuel nozzle is attached to the aircraft.

Post-Refuel/Hot Seat Checklist

1. Flight controls-Check.
2. COMM/NAV equipment-Tune.
3. TRQ and TOT CBs-Pull and reset. Note any exceedance.
4. Flight instruments-Check.
5. (C) NORMAL/RECOVER switch-Check.
6. Takeoff Checklist-Perform.