AD 72-07-11

72-07-11 CONSOLIDATED AERONAUTICS: Amendment 39-1429 as amended by Amendment 39-1577. Applies to Colonial Model C-1, C-2, and Lake Model LA-4, LA-4A, LA- 4P and LA-4-200 airplanes below S/N 503 certificated in all categories, incorporating Flap Actuator Pushrod Assembly, Lake Aircraft Corporation P/N 2-7811-7.

Compliance required as indicated.

To prevent hazards in flight as a result of the failure of the rod-end bearing, P/N HM-5C, connected to the flap pushrod, P/N 2-7811-21, accomplish the following:

(a) Within the next 15 hours in service after the effective date of this AD, unless already accomplished within the last 10 hours in service, and at intervals thereafter not to exceed 25 hours in service from the last inspection:

Remove the rod-end bearing P/N HM-5C at the forward end of the flap pushrod:

(1) Visually inspect the rod-end bearing for corrosion and for freedom of motion of the ball. Lubricate the ball before reinstalling the rod end.

(2) With at least a 10-power glass, inspect the threaded portion of P/N HM- 5C for cracks.

(b) Corroded, cracked, and binding parts must be replaced before further flight with parts inspected in accordance with this directive or with equivalent parts.

(c) When P/N HM-5G or an equivalent part is installed, the repetitive inspection specified in Paragraph (a) may be discontinued.

(d) Upon submission of substantiating data by an owner or operator through an FAA Maintenance Inspector, the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region, may adjust the repetitive inspection interval specified in this AD. Equivalent parts must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region. (Lake Aircraft Division, Consolidated Aeronautics, Service Letter No. 39 pertains to this subject.)

Amendment 39-1429 was effective upon publication in the Federal Register.

This Amendment 39-1577 becomes effective January 5, 1973.