AD 61-26-01

61-26-01 BEECH: Amdt. 377 Part 507 Federal Register December 15, 1961. Applies to All Model A45 (Converted T34A) Airplanes.

Compliance required as indicated.

Deteriorated flexible oil pickup hoses located within the engine oil tank will allow air to be drawn into the engine oil supply line. This can cause serious engine and propeller overspeeds due to improper propeller governing or engine damage from inadequate lubrication. To preclude such occurrences, the following inspection is required within the next 25 hours' time in service after the effective date of this directive unless already accomplished within the last 100 hours' time in service and at intervals of not more than 100 hours' time in service. Visually inspect the flexible oil pickup hose for condition. This will require removal of the oil tank inspection plate, disconnection of the pickup hose at its upper end and removal of the hose from the oil tank for inspection. Examine the hose for deterioration with close attention directed to the hose corrugations for cracks or checks in the minimum diameter sections. Deteriorated or defective hoses are to be replaced.

If new flexible hoses are installed, the 100-hour inspections must be continued. If a rigid type oil pickup line (Beech Kit 45-327 or equivalent) is installed so as to properly supply oil from the bottom of the tank, no further special inspections are required. FAA approved Airplane Flight Manual Supplement dated August 14, 1961, prohibiting inverted flight maneuvers, is required with the rigid type oil pickup line.

(Beech Service Letter T34A, No. 3 dated September 1961, covers this same subject.)

This directive effective January 16, 1962.