89-11-02 R1 McDONNELL DOUGLAS: Amendment 39-6216 as revised by Amendment 39-6415. Docket No. 89-NM-109-AD. \n\n\tApplicability: Model DC-9-15F, -32F, -33F, and -34F, including C-9A and C-9B (Military) series airplanes, as listed in McDonnell Douglas DC-9 Service Bulletin 52-70, dated January 22, 1969; Service Bulletin 52-87, dated June 7, 1974; Service Bulletin 52-91, Revision 2, dated August 12, 1976; Service Bulletin 52-92, Revision 2, dated November 21, 1985; Service Bulletin 52-93, Revision 1, dated May 3, 1978; and Service Bulletin 52-100, dated September 30, 1976; certificated in any category. \n\n\tCompliance: Required as indicated, unless previously accomplished. \n\n\tTo prevent inadvertent opening of the main cargo door in flight, a condition which could result in loss of pressurization and control of the aircraft, accomplish the following: \n\n\tA.\tWithin the next 14 days after May 30, 1989 (the effective date of Amendment 39-6216), ensure that the main cargo door is closed, latched, and locked prior to takeoff following each operation of the door, in accordance with the procedures specified below. The procedures required by this paragraph must be accomplished by qualified and trained personnel, and the training program must be approved by the FAA Principal Maintenance Inspector (PMI). The method for documentation of compliance must also be approved by the FAA PMI. \n\n\t\t1.\tFrom the outside of the airplane, perform a visual check of the exterior manual latch controls to ensure that the latch actuating socket and the lock pin handle are in the LOCK position; or \n\n\t\t2.\tPerform a visual check of the latches and lock pins, located on the inside of the main cargo door, to ensure that the latches are in the closed position and the lock pins are in the locked position. \n\n\t\t3.\tPrior to taxi, communicate to the flight crew that the main cargo door has been closed, latched, locked, and checked. \n\n\tB.\tUnless the modifications described in paragraph F.2. of this AD have previously been accomplished, within the next 30 days after May 30, 1989 (the effective date of Amendment 39-6216), and thereafter at intervals not to exceed 45 days, conduct a main cargo door-open indicating system functional check in accordance with Paragraph 1. McDonnell Douglas All Operator's Letter (AOL) 9-799, dated April 16, 1974. If the main cargo door-open indicating system functional check is not successfully accomplished, repair the main cargo door-open indicating system prior to further flight, in accordance with AOL 9-799. \n\n\tC.\tWithin the next 30 days after May 30, 1989 (the effective date of Amendment 39-6216), and thereafter at intervals not to exceed 45 days, inspect and modify the main cargo door control panel access door, spacer block, and "T" handle stowage clip, in accordance with McDonnell Douglas AOL 9-799A, dated January 22, 1975, and AOL 9-799, dated April 16, 1974, paragraph 2.A. In addition, inspect the control panel access door to ensure the door can be secured in the down and locked position. If the control panel access door can not be secured in the down and locked position, repair prior to further flight. \n\n\tD.\tUnless previously accomplished in accordance with Paragraph (2) of AD 75-03-03, Amendment 39-2076, within the next 30 days after May 30, 1989 (the effective date of Amendment 39-6216), verify that the main cargo door hydraulic control valve shaft operates freely, without binding, between the operate neutral and neutral lock positions. This shall be accomplished by opening the main cargo door hydraulic control valve control panel access door; raising the "T" handle, Douglas P/N 4777888-1; and pulling the "T" handle vertically upward to its maximum travel (operate neutral position). When the vertical force on the "T" handle is relieved, the main cargo door hydraulic control valve shaft should return to the neutral lock (down) position without binding. Replace the main cargo door hydraulic control valve, Douglas P/N 5919985-5001, prior to further flight, if the valve shaft does not return freely to the neutral lock position. \n\n\tE.\tWithin the next 30 days after May 30, 1989 (the effective date of Amendment 39-6216), inspect the main cargo door exterior lock pin handle and latch actuating socket markings in accordance with Paragraph 4.C. of McDonnell Douglas AOL 9-799, dated April 16, 1974; and McDonnell Douglas Drawings 7910689, Revision P, dated November 29, 1973, Item Numbers 16 and 18 (DC-9-15F), or Drawing 7910868, Revision AK, dated January 21, 1977, Item Numbers 16 and 18 (DC-9-32F, -33F, and -34F). If the exterior markings are not correct, modify in accordance with the above specified McDonnell Douglas drawings prior to further flight. \n\n\tF.\tWithin the next six months after the effective date of this amendment, accomplish the following: \n\n\t\t1.\tInstall a main cargo door hydraulic isolation valve in accordance with McDonnell Douglas Service Bulletin 52-91, Revision 2, dated August 12, 1976; and \n\n\t\t2.\tInstall a new main cargo door-open indicating circuit, revise the existing main cargo door-open indicating circuit, and install a main cargo door-open indicating system test circuit, in accordance with McDonnell Douglas Service Bulletin 52-92, Revision 2, dated November 21, 1985. Compliance with the requirements of paragraph B., above, may be terminated upon the accomplishment of the requirements of this paragraph. \n\n\tG.\tWithin one year after the effective date of this amendment, accomplish the following: \n\n\t\t1.\tInstall a main cargo door lock pin viewing window in accordance with McDonnell Douglas Service Bulletin 52-93, Revision 1, dated May 3, 1978; and \n\n\t\t2.\tInstall a main cargo door vent system in accordance with McDonnell Douglas Service Bulletin 52-100, dated September 30, 1976; and \n\n\t\t3.\tModify the main cargo door latch operating mechanism in accordance with McDonnell Douglas Service Bulletins 52-70, dated January 22, 1969, and 52-87, datedJune 7, 1974; and \n\n\t\t4.\tInstall a main cargo door hinge pin retainer on each end of the hinge, which is approved by the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region, that will retain the hinge pin in the event of a structural failure of the pin; and \n\n\t\t5.\tInstall a vent door-open indicating system, which is approved by the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region, that will signal the appropriate flight crew member when the main cargo door vent door is not fully closed and latched. \n\n\tH.\tCompliance with the requirements of paragraphs F., G.1., G.2., G.3., and G.5., above, constitutes terminating action for the initial and repetitive inspections required by paragraphs A., B., and C., of this AD. \n\n\tI.\tThe checks and modifications specified in paragraphs A. through G. of this AD are not required on airplanes which have the main cargo door deactivated and secured in the closed and locked position, in accordance with a method approved by the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region, until that door is reactivated. \n\n\tJ.\tCompliance with the requirements of this AD constitutes terminating action for the requirements of AD 84-23-02 for Model DC-9 series airplanes only. \n\n\tNOTE: The requirements of AD 84-23-02 relating to Model DC-8 series airplanes are not affected by this AD. \n\n\tK.\tAn alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region. \n\n\tNOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who will either concur or comment and then send it to the Manager, Los Angeles Aircraft Certification Office. \n\n\tL.\tSpecial flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes unpressurizedto a base in order to comply with the requirements of this AD. \n\n\tAll persons affected by this directive who have not already received the appropriate service information from the manufacturer may obtain copies upon request to McDonnell Douglas Corporation, 3855 Lakewood Boulevard, Long Beach, California, Attention: Director of Publications, C1-L00 (54-60). This information may be examined at FAA, Northwest Mountain Region, Transport Airplane Directorate, 17900 Pacific Highway South, Seattle, Washington, or Los Angeles Aircraft Certification Office, 3229 East Spring Street, Long Beach, California. \n\n\tAirworthiness Directive 89-11-02 superseded Amendment 39-2076, AD 75-03-03. \n\n\tThis AD revises AD 89-11-02, Amendment 39-6216. \n\n\tThis amendment (39-6415, AD 89-11-02 R1) becomes effective on January 13, 1990.