64-15-03 MCDONNELL DOUGLAS: Amendment 757 Part 507 Federal Register July 7, 1964 as amended by Amendment 801 (29 F.R. 12068), is further amended by Amendment 39-1287. Applies to Model DC-8 Series Aircraft (Except Model DC-8F). \n\n\tCompliance required as indicated. \n\n\tRecent fatigue cycle testing of some flap system components has shown a need to establish new service life limits. Accordingly, the following flap system components must be retired in accordance with applicable schedules specified herein: \n\n\t(a) Flap cylinder rod end bearing P/N 4648686-501, Station X(subscript w) = 97.906 and Station X(subscript F) #219.498. \n\n\t\t(1) Part Number 4648686-501 with more that 12,000 hours' time in service or more than 4,300 landings on the effective date of this AD shall be retired from service within 500 hours' time in service after the effective date of this AD. \n\n\t\t(2) Part Number 4648686-501 with 12,000 or less hours' time in service and 4,300 or less landings on the effective date of this AD, and parts installed subsequent to the effective date of this AD shall be retired prior to the accumulation of 12,500 hours' time in service or 4,500 landings, whichever occurs first. \n\n\t(b) Flap cylinder rod end bearing P/N 4648686-503, Station X(subscript W) = 97.906 and Station X(subscript F) = 219.498. \n\n\t\t(1) Part Number 4648686-503 with more than 13,500 hours' time in service or more than 4,400 landings on the effective date of this AD shall be retired from service within 500 hours' time in service after the effective date of this AD. \n\n\t\t(2) Part Number 4648686-503 with 13,500 or less hours' time in service and 4,400 or less landings on the effective date of this AD, and parts installed subsequent to the effective date of this AD shall be retired from service prior to the accumulation of 14,000 hours' time in service or 5,000 landings, whichever occurs first. \n\n\t(c) Flap cylinder rod end bolt P/N 2645104, Station X(subscript W) = 97.906, and Station X(subscript F) = 219.498 and 339.723. \n\n\t\t(1) Part Number 2645104 with more than 27,500 hours' time in service or more than 9,800 landings on the effective date of this AD shall be retired from service within 500 hours' time in service after the effective date of this AD. \n\n\t\t(2) Part Number 2645104 with 27,500 or less hours' time in service and 9,800 or less landings on the effective date of this AD, and parts installed subsequent to the effective date of this AD shall be retired prior to the accumulation of 28,000 hours' time in service or 10,000 landings, whichever occurs first. \n\n\t(d) Compensating flap actuating link P/N's 3648269, 3648268, 3648270, Station X(subscript W) = 97.906, Station X(subscript F) = 219.488, Station X(subscript F) = 399.723, respectively. \n\n\t\t(1) Part Numbers 3648268, 3648269, 3648270 with no bushings installed in the 0.9995/1.005 inch-diameter holes, and with more than 11,800 hours' time in service or more than 4,200 landings on the effective date of this amendment, shall be inspected and reworked as specified in (d)(5) within the next 500 hours' time in service, except as provided in (e)(1). \n\n\t\t(2) Part Numbers 3648268, 3648269, 3648270 with no bushings installed in the 0.9995/1.005 inch-diameter holes and with 11,800 or less hours' time in service and 4,200 or less landings on the effective date of this amendment and parts installed subsequent to the effective date of this amendment shall be inspected and reworked as specified in (d)(5), prior to the accumulation of 12,800 hours' time in service or 4,400 landings, whichever occurs first, except as provided in (e)(1). \n\n\t\t(3) Part Numbers 3648268, 3648269, 3648270 with bushings installed in the 0.9995/1.005 inch-diameter holes and having more than 4,500 hours' time in service or more than 1,600 landings on the effective date of this amendment shall be inspected and reworked as specified in (d)(5) within 500 hours' time in service after the effective date of this amendment. \n\n\t\t(4) Part Numbers 3648268, 3648269, 3648270 with bushings installed in the 0.9995/1.005 inch-diameter holes and with 4,500 or less hours' time in service and 1,600 or less landings on the effective date of this amendment shall be inspected and reworked as specified in (d)(5) prior to the accumulation of 5,000 hours' time in service or 1,780 landings, whichever occurs first. \n\n\t\t(5) Parts which have not been reworked in accordance with Douglas Service Bulletin No. 27-144, dated June 7, 1963, as of the effective date of this amendment shall be inspected and reworked in accordance with the accomplishment instructions of Douglas Service Bulletin No. 27-144, Reissue No. 1, dated August 3, 1964, or an FAA-approved equivalent, within the time limits specified in (d), (1), (2), (3), or (4), as appropriate. \n\n\t(e) Service life limits for reworked parts are as follows: \n\n\t\t(1) Parts which have been reworked in accordance with Douglas Service Bulletin No. 27-144, datedJune 7, 1963, as of the effective date of this amendment may be continued in service not to exceed 10,000 landings or an additional 28,000 hours' time in service from the time of rework of the 0.250/0.25A diameter holes, whichever occurs first, and then must be retired from service. \n\n\t\t(2) Parts with the bushings installed as noted in (d)(3) and (d)(4) may be continued in service not to exceed an additional 3,570 landings or 10,000 hours' time in service, whichever occurs first, from the time of rework of the 0.250/0.25A diameter holes and then must be retired from service. \n\n\t\t(3) Parts without bushings installed during rework of the 0.250/0.25A diameter holes, may be continued in service not to exceed an additional 10,000 landings or 28,000 hours' time in service, whichever occurs first, from the time of rework, and then must be retired from service. \n\n\tNOTE: Due to the improved orientation of the 0.250/0.254 inch diameter lock pin hole, compensating flap actuating link P/N's 3648268, 3648269, and 3648270 which have had that hole drilled in accordance with McDonnell Douglas Assembly Drawing Nos. 4717382 (Change letter B or later), 4717381 (change letter A or later), and 4717383 (change letter B or later), respectively, are not subject to the service life limits of Paragraph (e) above. \n\n\t(f) Parts with evidence of cracks remaining after the initial chamfer is specified in Douglas Service Bulletin No. 27-144, Reissue No. 1, dated August 3, 1964, are not eligible for further use. \n\n\t (Douglas Service Bulletins No. 27-127, Revision No. 2 dated January 28, 1964, and No. 27-144 Reissue No. 1 dated August 3, 1964, cover this same subject.) \n\n\tThis directive became effective July 7, 1964. \n\n\tRevised August 25, 1964. \n\n\tThis Amendment 39-1287 becomes effective September 11, 1971.