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Installation instructions and materials list to reinforce the rear center section beam with an additional stiffener angle, part number 415-13109.
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General guidelines for inspection and maintenance of control surfaces.
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Failures of the exhaust stacks have occurred in the area of the cabin heat muffs, causing hazardous carbon monoxide contamination of the cabin when cabin heat is used.
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Inspect for and detect any internal or external corrosion of the wing lift strut tube, and thereby prevent wing strut failure and inflight separation of the wing from the airplane resulting in loss of control of the airplane.
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Per Lycoming Division of Avco Corporation, it is permissible to use a torque value of 40 inch pounds to provide adequate tightness to maintain proper engine support in lieu of the linear dimension as previously specified.
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Evidence of premature internal corrosion in the steel tube structure of the vertical fin and the five tail surfaces (stabilizers, elevators, and rudder).
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Scanned pages from a 1944-45 Supply Division, Inc. catalog which show Grimes landing and position lights.
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Directions to prevent failure of the seat back which could result in loss of control of the airplane.
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How to determine if the lower longerons are made from 1025 steel or the approved 4130 steel. To be accomplished before further flight.
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Inspection of forward wing spar caps to detect cracks or other damage.