Defective generator control unit.
Current transformer miswired
A4. Excessive starting RPM.
Accessory gearbox input shaft coupling not
Accessory gear drives, bushings or compres-
sor rear hub splines are defective.
A5. Engine fails to light up.
Proper engine starting procedure.
No power to ignition exciter
Defective wiring or components
Debris or ice in fuel system
Air lock in fuel control unit
Engine driven primary high pressure
A6. Engine fails or is slow to accelerate to idle N1
Improper engine starting technique or pre-
mature removal of starter from line.
Leaks or restrictions on fuel control unit
Leaks in pneumatic line of propeller gover-
Fuel control unit contaminated with water
or ice, or corroded.
A7. Hot start or delayed light up.
Improper starting procedure.
Insufficient power from battery or ground
Poor connections on power input lines or