75-24-09 BOEING: Amendment 39-2436 as amended by Amendment 39-3032. Applies to Model 737-100/-200 series airplanes listed in Boeing Service Bulletin 737-27-1080, certificated in all categories, compliance required as indicated. \n\tTo prevent an inadvertent deployment of ground spoilers in flight after the loss of system "A" hydraulic pressure, accomplish one of the following: \n\tA.\tWithin the next 100 hours time in service after the effective date of this AD, unless already accomplished, remove the existing placards, P/N BACM10H6CY and BAC27DHY195, and install warning placards, P/N BAC27DHY220 and BAC27DHY221, or equivalent placards approved by the FAA assigned maintenance inspector, in accordance with the instructions contained in Boeing Service Bulletin 737-29-1027 dated December 20, 1974, or later revisions, or any other equivalent placard, approved by the Chief, Engineering and Manufacturing Branch, Northwest Region, near the hydraulic pressure filling installation, on the hydraulic system "A" reservoir, and at the ground service hydraulic module. These placards warn that servicing the 737 airplane with Stauffer Aero Safe ER hydraulic fluid is prohibited. The improved lubricity characteristics of the ER fluid may permit the unlocking of the ground spoiler actuators in flight if/when hydraulic system "A" fails; or \n\tB.\tUnless already accomplished, accomplish the following in accordance with the applicable instructions contained in Boeing Service Bulletin 737-27-1080 dated November 21, 1975, or later FAA approved revisions: \n\t\t1.\tRemove and rework ground spoiler actuators, P/N 65-44851-3, -4, -5, or -6 and 65- 44961-2, -4, or -5; and \n\t\t2.\tReidentify the reworked ground spoiler actuators; and \n\t\t3.\tReinstall the reworked and reidentified ground spoiler actuators, P/N 65-44851-7 and 65-44961-6; and \n\t\t4.\tRemove warning placards, P/N BAC27DHY221 and BAC27DHY220, or equivalent placards; and \n\t\t5.\tInstall service placards, P/N BAC27DHY195 and BAC27DHY233, or equivalent placards approved by the FAA assigned maintenance inspector. \n\tAirplanes having complied with paragraph B above are compatible with hydraulic fluids that have been qualified to Boeing Specification BMS 3-11 including Stauffer Aero Safe ER Type IV hydraulic fluid. \n\tThe manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). \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. The documents may also be examined at FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington. \n\n\tAmendment 39-2436 superseded AD 75-08-06. \n\tAmendment 39-2436 became effective December 2, 1975. \n\tThis amendment 39-3032 becomes effective September 12, 1977.