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Airworthiness Directives; Navion Models Navion through Navion H Airplanes

Unsafe Condition: Failure of the Rudder Horn, P/N 145-24401, due to horizontal cracks or corrosion in the edge, which may appear as delaminations or swelling under the paint.

Why matched: Airworthiness Directives; Navion Models Navion through Navion H Airplanes

Airworthiness Directives; Navion Models Navion, Navion A, Navion B, Navion D, Navion E, Navion F, and Navion G Aircraft

Unsafe Condition: The landing gear selector valve end fitting P/N 145-58145-3 (heat treated and non-heat treated) has a service history of failure during attempts to extend the gear.

Why matched: Airworthiness Directives; Navion Models Navion, Navion A, Navion B, Navion D, Navion E, Navion F, and Navion G Aircraft

Airworthiness Directives; Navion All Models

Unsafe Condition: Cracks starting at the wing centerline attaching bolt hole in the wing rear spar junction fittings (P/N 145-14070) at wing Station O have been found on a number of Navion aircraft.

Why matched: Airworthiness Directives; Navion All Models

Airworthiness Directives; NAVION All Serials Up to and Including Number NAV-4-947.

Unsafe Condition: Nose gear hydraulic actuating cylinder line failures due to inflexibility.

Why matched: Airworthiness Directives; NAVION All Serials Up to and Including Number NAV-4-947.

Airworthiness Directives; All Navion Airplanes Equipped With Product Techniques, Inc., Propeller Spinners

Unsafe Condition: Unsatisfactory spinner bulkheads with thickness less than 0.045 inch at the perimeter may fail, leading to propeller spinner detachment.

Why matched: Airworthiness Directives; All Navion Airplanes Equipped With Product Techniques, Inc., Propeller Spinners

Airworthiness Directives; All Navion Models Equipped With Hartzell Propeller Blade Models 8428, 8428C, 8428R Having Serial Numbers Below 61000

Unsafe Condition: Fillers used in Hartzell Propeller Blade Models 8428, 8428C, 8428R with serial numbers below 61000 may be discernible to the naked eye in the area approximately 4 inches outboard of the blade clamp...

Why matched: Airworthiness Directives; All Navion Models Equipped With Hartzell Propeller Blade Models 8428, 8428C, 8428R Having Serial Numbers Below 61000

Airworthiness Directives; Navion All Models, Serial Numbers NAV-4-2 and Above

Unsafe Condition: The aileron control chain guard may jam, leading to potential control column malfunction.

Why matched: Airworthiness Directives; Navion All Models, Serial Numbers NAV-4-2 and Above

Airworthiness Directives; Navion B Type Aircraft

Unsafe Condition: Cylinder head and oil temperature values can exceed established limits due to engine cooling tests revealing overheating risks from Reading Aviation Service Inc. or Hackenberg Sales and Service dow...

Why matched: Airworthiness Directives; Navion B Type Aircraft

Airworthiness Directives; Navion Serial Numbers NAV-4-2 Through 411

Unsafe Condition: Short circuits between the generator lower terminal and the fitting on the hydraulic pump inlet hose have been reported.

Why matched: Airworthiness Directives; Navion Serial Numbers NAV-4-2 Through 411

Airworthiness Directives; Navion Applies to All Models, Serial Numbers NAV-4-2 and \\nSubsequent

Unsafe Condition: Cracks in the stabilizer spar web (gusset), root rib, and fuselage attaching fitting (P/N 143-31004-13) could lead to structural failure.

Why matched: Airworthiness Directives; Navion Applies to All Models, Serial Numbers NAV-4-2 and \\nSubsequent

Airworthiness Directives; Navion Airplanes Equipped with Adel Electric Booster Pumps

Unsafe Condition: Air leakage into the fuel system through a 0.062-inch diameter hole in the plate at the rear of the Adel pump inlet chamber, which was originally intended to prevent overboard drainage of fuel thro...

Why matched: Airworthiness Directives; Navion Airplanes Equipped with Adel Electric Booster Pumps

Airworthiness Directives; Tusco Corporation (Navion) Applies to All Models

Unsafe Condition: Failures of hydraulic actuating cylinders causing loss of flaps and landing gear collapse.

Why matched: Airworthiness Directives; Tusco Corporation (Navion) Applies to All Models

Airworthiness Directives; All Navion and All Twin Navion Models Temco D-16, Temco D-16A, Dauby, Riley, and Camair 480 Airplanes

Unsafe Condition: The unsafe condition in the main and nose gear retraction links cannot in all cases be detected by the inspection as required in AD's 61-12-04 and 62-14-04.

Why matched: Airworthiness Directives; All Navion and All Twin Navion Models Temco D-16, Temco D-16A, Dauby, Riley, and Camair 480 Airplanes

Airworthiness Directives; Navion Airplanes Equipped With Carter Fuel Pumps Continental P/N 530509 (Carter M687-S and M688-S) or Continental P/N 50375

Unsafe Condition: Carter fuel pump lower diaphragm failures caused by diaphragm deterioration due to excessive pump temperatures when pumps are run dry.

Why matched: Airworthiness Directives; Navion Airplanes Equipped With Carter Fuel Pumps Continental P/N 530509 (Carter M687-S and M688-S) or Continental P/N 50375