波音737飞机737NG-SRP-55-0084_Horizontal_Stabilizer_Freeplay-Inspection_04.04.2022

Horizontal Stabilizer -InspectionA.General Notes(1)This task is to calculate the freeplay of the horizontal stabilizer.The freeplay of the horizontalstabilizer is the total of the freeplay of the stabilizer jackscrew and the hinge mechanism.(2)This task involves the use of multiple shot bags applied in the area of the front spar of thehorizontal stabilizer.One set of shot bags weighing a total of 600+20 pounds is required forthe hinge bearing measurements.Two sets of shot bags weighing a total of 500+20 poundsper set(total 1000+40 pounds)is required for the jackscrew measurement.The proceduredescribed herein uses shot bags weighing 25+1 pounds each.a)For hinge bearing measurements,use of bags of alternate capacity is acceptable so longas the intended weight,placement and distribution of the bags achieve an evendistribution of weights such that the total weight is centered 72+2 inches outboard of LESTA 198.23 shown in Figure 1,View C.b)For jackscrew measurements,use of bags of alternate capacity is acceptable so long asthe intended weight is achieved and the placement is confined within the location shownin Figure 1,View E.c)When placing the weight,protect the upper surface of the horizontal stabilizer with asheet of soft padding as needed to ensure damage is not caused by weights.B.ReferencesReferenceTitle27-41-81-000-801Stabilizer Ball Nut and Jackscrew Gearbox Removal (P/B 401)27-41-31-000-802Horizontal Stabilizer Center Section Hinge Pin Removal (P/B 401)C.Tools/EquipmentReferenceDescriptionSTD-1200SandbagSTD-1238Indicator-DialSTD-1279Mount-Device,Mounting,Holds the Dial IndicatorD.Location ZonesZoneArea311Area Aft of Pressure Bulkhead -Left312Area Aft of Pressure Bulkhead-Right330Subzone-Left Horizontal Stabilizer and Elevator340Subzone-Right Horizontal Stabilizer and ElevatorE.Access PanelsNumberName/Location311BLStabilizer Trim Access DoorF.Work Instructions1.Prepare for the Check(a)On the stabilizer trim actuator,do this task:1)Open this access panel:NumberName/Location311BLStabilizer Trim Access Door2)Set the stabilizer to 4 units of trim.