86-05-10 MCDONNELL DOUGLAS: Amendment 39-5256. Applies to McDonnell Douglas Model DC-10-10, -10F, -15, -30, -30F, -40, and KC-10A (Military) series airplanes, certificated in any category, equipped with anti-skid valve assemblies, Goodyear Aerospace Corporation Part Numbers 6000189, 6000189-2, and 6000189-3, having serial number dates of JUL81-8519 through serial numbers dated April 1985, or any valves overhauled during January 1981 through April 1985 having end cap screws replaced with screws obtained from Goodyear Aerospace Corporation. Compliance required as indicated, unless previously accomplished. \n\n\tTo preclude the potential of hydraulic system fluid loss with subsequent loss of braking system performance on anti-skid valve assemblies, accomplish the following: \n\n\tA.\tWithin 12 months after the effective date of this airworthiness directive (AD), modify and reidentify the anti-skid valve assemblies as outlined in the Accomplishment Instructions of Goodyear Service Bulletin DC10-10-32-29 and DC10-30/40-32-41, dated May 3, 1985, or later revisions approved by the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region. \n\n\tNOTE: Removal and installation of skid control manifold or skid control valve may be accomplished as outlined in McDonnell Douglas Service Bulletin 32-209, dated June 27, 1985. \n\n\tB.\tAlternate means of compliance which provide an acceptable level of safety may be used when approved by the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region. \n\n\tC.\tSpecial flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD. \n\n\tAll persons affected by this proposal who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to McDonnell Douglas Corporation, 3855 Lakewood Boulevard, Long Beach, California 90846, Attention: Director,Publications and Training, C1-750 (54-60); or Goodyear Aerospace Corporation, 1210 Massillon Road, Akron, Ohio 44315. These documents also may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or the Los Angeles Aircraft Certification Office, 4344 Donald Douglas Drive, Long Beach, California. \n\n\tThis amendment becomes effective April 21, 1986.