CC-ALY Systems Review

Question 1

Carburator Icing Temperature Range

Answer 1

Carb icing most likely when OAT below 70°F (21°C) and the relative humidity is high (above 80%).

Question 2

Electrical System Basics

Answer 2

• 14-volt, direct current system
• Powered by engine-driven alternator
• 12-volt battery

Question 3

Troubleshooting

Weak, intermittent firing; puffs of black smoke from exhaust stack

on startup

Answer 3

• Overpriming or flooding
• Clear by setting the mixture to idle, opening the throttle, and cranking through several revolutions; then start normally without further priming

Question 4

Procedures

Mag Check

Answer 4

• Perform to 1700 RPM
• Dip should not exeed 125 RPM on either side or show a differential greater than 50 RPM between sides

Question 5

Troubleshooting

RPM Reduction

Answer 5

• Carburator icing
• Apply full throttle and full carb heat, then minimum necessary to prevent icing
• Adjust mixture to compensate for richer mixture caused by warm air (which is less dense)

Question 6

Troubleshooting

Slight engine roughness

Answer 6

• Fouled spark plugs
• Verify by checking individual magnetos
• Lean the mixture for cruise flight; if roughness continues, choose mixture setting for best opperation and land as soon as practicable