64-12-02 BOEING: Amdt. 743 Part 507 Federal Register June 5, 1964. Applies to All Model 727 Series Aircraft. \n\n\tCompliance required as indicated. \n\n\tAs an interim safety measure pending development and accomplishment of final corrective modifications, the following is required: \n\n\t(a) Initial compliance required within 20 hours' time in service after May 19, 1964. Before each flight when the thrust reversers have been used on the previous flight, conduct a close visual inspection of each reverser to ascertain that each deflector door is in the fully closed position and that the thrust reverser indicator light is out. If the doors are not fully closed or if the indicator light is not out corrections shall be made before further flight. Upon compliance with (b) and (c) of this directive the visual inspection required by this paragraph may be discontinued.\n \n\t(b) Within 20 hours' time in service after the effective date of this AD, unless previously accomplished, inspectthe thrust reverser locking pin for freedom of action and the reverser operating light switch for proper adjustment and rigging. If the locking pin is bent or binding or if the operating light is out of adjustment, necessary correction shall be made before further flight. (Boeing Service Bulletin No. 78-10R1 covers this subject.) \n\n\t(c) Within 150 hours' time in service after the effective date of this AD, unless already accomplished, modify the thrust reverser lockout actuator rocker, including rework of the switch actuating tine, in accordance with Boeing Service Bulletin No. 78-10R1. \n\n\tNOTE. - The original issue of this bulletin did not include information for rework of the tine. \nThis rework is necessary to prevent interference and damage to the locking pin. \n\n\t(d) Prior to compliance with (b) and (c) the inspection required by (a) shall also be made before flight when any reverser is again actuated on the ground during engine runup or during taxiing. Upon compliance with (b) and (c) further inspections under paragraph (a) need not be made. \n\n\t(e) Approval of any equivalent means of compliance with this directive shall be processed through the Aircraft Engineering Division, FAA Western Region, Los Angeles, California. \n\n\t(Boeing's telegram to all 727 operators dated May 20, 1964, covers this 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 telegram dated May 22, 1964, superseding the telegram dated May 18, 1964. \n\n\tRevised July 7, 1964. \n\n\tRevised August 29, 1964.