Provides approved modifications for nose gear and nose gear support structure problems caused by wear, overload conditions, prior AC-43.13 repairs, etc., for all Models.
Provides automatic ignition for both engines in case of engine flameout during takeoff and landing on wet runways and during flights in icing conditions. Automatic ignition is not limited to only these conditions; it is available anytime the engine RPM is above 60 percent. Models 680T, 680V, 680W, 681, 690, 690A, 690B.
Provides a positive stop for the cabin entrance door on long fuselage Twin Commanders giving protection for door hinges and fuselage structure. Models 680FL, 680FL(P), 680T, 680V, 680W, 681, 685, 690.
Prevents aircraft with long-range fuel systems from venting fuel overboard through wing vents during fueling and taxiing. Models 680T, 680V, 680W, 681.
Modification provides an accurate indication of each propeller boot operation and an accurate visual indication that propeller deicer system is operating within designed electrical load limits for Models 680T, 680V, 680W, 681.