62-16-02 DOUGLAS: Amdt. 462 Part 507 Federal Register July 12, 1962. Applies to All Model DC-8 Aircraft With Outboard Flap Actuating Cylinder Douglas P/N 3643686. These Cylinders Can Be Identified As Having An Outside Diameter of 3.810-3.820 Inches At The Forward End Of The Barrel Where The Cylinders Attach To The Wing Flap Crank. \n\n\tCompliance required as indicated. \n\n\t(a) On aircraft incorporating flap quadrant stops which limit flap extension to 40 degrees full down, conduct a close visual inspection daily of the forward 1/4 inch of length and around the entire periphery of both outboard wing flap actuating cylinder barrels for evidence of cracks or fluid leakage. Conduct inspection with hydraulic pressure on. Investigate hydraulic fluid leakage to determine cause. Barrels showing evidence of cracks shall be replaced prior to further flight. \n\n\t(b) On aircraft not incorporating 40 degrees full-down quadrant stops, prior to each flight inspect in accordance with (a) until aircraft are modified as follows: \n\n\t\t(1) Install a stop on the control pedestal assembly as described on Serial E.0.001 to Douglas Drawing 5640901 which restricts flap extension to 46-48 degrees down travel or, install a new flap position quadrant, flap-detent locating nameplate and flap position placard in accordance with Figure (2) of Douglas DC-8 Service Bulletin No. 27-134 or FAA approved equivalent. \n\n\t\t(2) Rig the flap in accordance with the instructions contained in Addendum No. 1 dated June 12, 1962, to Douglas Alert Bulletin A27-134 or rig the flap in accordance with (d)(3). \n\n\t(c) When modifications in accordance with (b) have been accomplished, the preflight inspection required by (b) may be conducted daily. \n\n\t(d) The daily or preflight inspections required in (a), (b) and (c) may be discontinued if the following is accomplished: \n\n\t\t(1) Conduct initial inspection of both outboard barrel assemblies, P/N 3643686-1, in accordance with steps (1) through (4)of Figure (1) in DC-8 Service Bulletin No. 27-134. Barrels meeting the inspection requirements specified therein, may be continued in service. After this initial inspection, periodically reinspect barrels for cracks in accordance with step (1), mentioned above, at intervals not to exceed 2,500 hours' time in service thereafter. Barrels showing evidence of cracks shall be replaced prior to further flight. \n\n\t\t(2) Accomplish rework outlined in paragraph (b) (1). \n\n\t\t(3) Adjust all flap actuating cylinders and rig the flaps to the pertinent dimensions, flap travel limits and flap travel times specified in paragraph 2, Accomplishment Instructions, Kit C or D, paragraph E of Douglas DC-8 Service Bulletin No. 27-134, or an FAA approved equivalent. \n\n\t(e) The magnetic inspection, step (1), specified in (d)(1), may be discontinued: \n\n\t\t(1) After the fourth such inspection if the barrels, P/N 3643686-1, meet the inspection requirements of (d)(1), are shot peened in accordance with Figure (1) of Douglas DC-8 Service Bulletin No. 27-134, reidentified as P/N 3643686-501, and further identified with a color code or FAA approved equivalent; or \n\n\t\t(2) Upon installation of new shot peened barrels, P/N's 3643686-501 or 3774061-501. \n\n\t(f) Upon request of the operator an FAA maintenance inspector, subject to prior approval of the Chief, Engineering and Manufacturing Branch, FAA Western Region, may adjust the repetitive inspection intervals specified in this AD to permit compliance at an established inspection period of the operator if the request contains substantiating data to justify the increase for such operator. \n\n\t(Douglas DC-8 Service Bulletin No. 27-134 dated July 20, 1962, covers this same subject.) \n\n\tThis directive effective upon publication in the Federal Register for all persons except those to whom it was made effective immediately by telegrams dated June 7, 1962, and June 14, 1962. \n\n\tRevised November 3, 1962.