49-27-03 DOUGLAS: Applies to All Models C54-DC and DC-4 Series Aircraft. \n\n\tTo be accomplished as indicated below: \n\n\t1.\tPrior to 5,000 hours total airplane time, or at next scheduled inspection at which necessary facilities are available, on airplanes with more than 5,000 hours total time, inspect nose gear yoke and fittings, P/N 5087950 and either 5087951 or 5180402 to determine if the 1/2-inch radius fairs in properly with the journal. All parts having a poor radius condition must be replaced immediately with parts having the correct radius fairing into the journal. This inspection does not have to be repeated if already accomplished. \n\n\t2.\tParts having a good radius must be replaced at each 17,500 hours airplane operation time. If the replacement parts have been shotpeened, as per Douglas Aircraft Co. recommendations, the replacement time may be extended to 30,000 hours airplane operation time. \n\n\t3.\tUnused parts having a poor radius may be used, after being reworkedaccording to Douglas Aircraft Co. recommendations. \n\n\t4.\tAll used nose hear yoke end fittings having not more than 17,500 hours total time may be reinstalled and used for a total time of 30,000 hours if Zyglo inspection reveals no cracks; the radius of the journal is properly reworked to meet the limiting dimensions of Douglas E. C. 1361954 and the part is shotpeened in accordance with Douglas Aircraft Co. standards. \n\n\t5.\tAt the time of replacement of parts as per item 1, or at the next major aircraft overhaul period, rework bushing, P/N 1087938, to incorporate a 1/8-inch radius on the inside diameter at the flanged end of the bushing. Rework ring, P/N 2103390, by providing a 0.031-inch radius on the inside edges. \n\n\t(Douglas Service Letters A-214-T.51/WBM dated January 7, 1948; A-214 TS2249/WBM dated November 25, 1947; and A-214-TS-1572/WBM dated October 20, 1947, cover the above.) \n\n\tThis supersedes AD 48-24-02.