79-11-02 BOEING: Amendment 39-3482. Applies to the Model 727 airplanes that have the following serial numbers: \n\t\nGroup I: These airplanes were delivered with auto-speedbrakes operative: \n\n\n727-2F2\t\t\n21603 \n727-222\t\t \n21398 through 21425 \n21557 through 21574\n727-225\t\t\n21449 through 21453 \n21578 through 21581 \n727-2R1\n21636 \n727-2A1\n21341 through 21344 \n727-2F9\t\t\t\t\t\n21426 and 21427 \n727-287\n21688 and 21689 \n727-290\t\t \t\t \n21510 and 21511\n727-243\t\n21661 through 21664 \n727-256\n21609 through 21611\n727-2K3\t\n21494 and 21495\n727-2L5\t\n\t\t\t\n21332 and 21333 \n21539 and 21540 \n727-2J4\t\n21676 \n727-281\n21455 through 21456 \n21474 \n727-251 \n21503 through 21506 \n727-2P1\n21595\n727-2M7\t\n21457 and 21502 \n21655 \n727-212\n21347 through 21349 \n21458 through 21460 \n\n\t\nGroup II: These airplanes were delivered without auto-speedbrakes: \n\n\n\n727-277\t\t\n\t\t\t\n21480 and 21647 \n727-227\n21363 through 21366 \n21394 and 21395 \n21461 through 21466 \n21488 through 21493 \n21529 through 21531 \n727-232\t\t\n21303 through 21315 \n21430 through 21433 \n21469 through 21472 \n21582 and 21583\n727-230\t\t\n21442 \n21618 through 21623\n727-264\t\t\n\t\t\t \n21577 and 21617 \n21637 \n727-276\n21479 and 21646\n727-2H3\t \t\t\t \n21318 through 21320\n727-247\n21329 through 21331 \n21392 and 21393 \n21481 through 21485\n727-243\t\t \n21320\n\t\nGroup III: These airplanes were delivered with auto-speedbrakes deactivated: \n\n\n\n727-214\t\n21512 and 21513\n727-2Q8\n21608\n\n\n\tCompliance required as indicated: \n\tA.\tWithin 50 hours time-in-service after the effective date of this AD, unless Service Bulletin 727-31-A44, revision 1, or later FAA approved revisions, have already been accomplished, accomplish the following: \n\t\tFor Group I airplanes delivered with the auto-speedbrake system operative: Prior to conducting operations when the outside air temperature is below 25 degrees F the auto- speedbrake system must be deactivated by pulling and collaring the circuit breakers and placarding handle inoperative and the crew advised that the takeoff warning system may not function. \n\t\tFor Group II airplanes delivered without the auto-speedbrake system, and for Group III airplanes that were delivered with the auto-speedbrake system deactivated: Prior to conducting operations when the outside air temperature is below 25 degrees F advise the flight crew that the takeoff warning system may not function. \n\tB.\tWithin 1,000 hours time-in-service or 6 months after the effective date of this AD, whichever comes first, and unless already accomplished, perform a one-time check of the throttle lever auto-speedbrake/takeoff warning switch setting and adjust these switches, if necessary, in accordance with Boeing Alert Service Bulletin 727-31-A44, Revision 1, or later FAA-approved revisions. \n\tAll persons affected by this directive who have not already received these documents from the manufacturer, may obtain copies upon request to Boeing Commercial Airplane Company, P.O. Box 3707, Seattle, Washington 98124. These documents may also be examined at FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108. \n\n\tThis amendment becomes effective June 11, 1979.