KRUEGER FLAP - REMOVAL/INSTALLATION WARNING: FLIGHT CONTROLS - MAKE SURE THAT THE GROUND SAFETIES AND NOTICES ARE IN POSITION. FLIGHT CONTROLS - MAKE SURE THAT THE TRAVEL RANGES OF THE CONTROL SURFACES ARE CLEAR. HYDRAULICS - BEFORE PRESSURIZING, MAKE SURE THAT THE CONTROLS MATCH THE SURFACE POSITION. ELECTRICAL POWER - BEFORE POWER IS SUPPLIED TO THE AIRCRAFT MAKE SURE THAT ANY ELECTRICAL CIRCUIT UPON WHICH WORK IS IN PROGRESS IS ISOLATED. 1. Reason for the Job A. Removal/Installation of the hinged door. B. Removal/Installation of the folding nose only. C. Removal/Installation of the Krueger flap and folding nose. D. Removal/Installation of the flight control rod. 2. Hinged Door A. Equipment and Materials ITEM DESIGNATION A. Access Platform 4 m (13 ft) B. Circuit Breaker Safety Clips and Tags C. Torque Wrench, 31 to 40 lbf.in. (0.35 - 0.45 m.daN) D. Torque Wrench, 75 to 90 lbf.ft (10.17 to 12.20 m.daN) E. Warning Notices Prohibiting Use of Slats and Krueger Flap Systems F. SL90.313-0.8750 Installation Tool G. SL90.314-0.8750 Removal Tool H. SL90.374-0.8750 Wrench Tool J. 98A27808011000 Rigging Pin - Krueger Flap K. Cotter Pins L. Material No. 04-004 Common Greases (Ref. 20-31-00) P.Blk EFFECTIVITY: FED ALL 27-80-19-04 Page 1 of 38 Printed - Date: 11/29/2012 Time: 11:13:51 Copyright © 2012 FedEx Express Corporation, Memphis TN, 38194, All rights reserved. JAN 16/2012 ITEM DESIGNATION Referenced Procedures - (Ref. 20-21-16, P. STA LOK Nuts and Lockwashers Block 001) List of Materials Required for Aircraft - (Ref. 20-31-00, P. Service and Maintenance Block 001) - (Ref. 24-41-00, P. AC External Power Control Block 301) - (Ref. 29-10-00, P. Main Hydraulic Power Block 301) - (Ref. 29-21-00, P. Green Auxiliary Power Block 301) B. Procedure (1) Job Set-Up (a) Energize the aircraft electrical network (Ref. 24-41-00, P. Block 301) . (b) Pressurize the Green hydraulic system (Ref. 29-21-00) or (Ref. 29-10-00, P. Block 301) . WARNING: IF THE SELECTOR SOLENOID IS USED TO EXTEND THE KRUEGER FLAP IT WILL CAUSE THE AILERON TO DROOP BY 10 DEGREES. NOTE: If the position of the slats is 15 deg. or greater, the Krueger flaps will already be extended. (c) On the Krueger selector solenoid-valve (50CV), at STA 2612/FR47, push (in) the button II on the solenoid II to extend the Krueger flap. (d) Open, safety and tag the circuit breakers that follow: PANEL SERVICE IDENT. LOCATION 127VU FLT CTL/SLATS Line 704 P.Blk EFFECTIVITY: FED ALL 27-80-19-04 Page 2 of 38 Printed - Date: 11/29/2012 Time: 11:13:51 Copyright © 2012 FedEx Express Corporation, Memphis TN, 38194, All rights reserved. JAN 16/2012 PANEL SERVICE IDENT. LOCATION 127VU FLT CTL/KRUEGER 45CV 704/M62 127VU FLT CTL/FLAPS Line 705 127VU FLT CTL/FLAPS & SLATS POS Line 705 127VU FLT CTL/SLATS Line 704 127VU FLT CTL/KRUEGER 45CV 704/M61 127VU FLT CTL/FLAPS Line 705 127VU FLT CTL/FLAPS & SLATS POS Line 705 (e) Display the warning notices, prohibiting the use of the slats and the Krueger flap systems. (f) Put the access platform in position below Zone 513 (613). (g) Engage the rigging pin PN 98A27808011000 through the Rib 2B and the outboard bracket. (2) Removal (Ref. Fig. 401) (Ref. Fig. 402) (a) Hold the Krueger flap, then use the removal tool PN SL90.314-0.8750 to remove the lockwasher (37) and use the wrench tool PN SL90.374-0.8750 to remove the nut (38) (Ref. 20-21-16, P. Block 001) . (b) Remove the bolt (35) from the outboard bracket and the actuator rod eye-end (36). Lower the Krueger flap and allow it to hang in approximately the mid- travel position. Remove and retain the sliding bushes (34). (c) Manually move the Krueger flap to get access to the hinged door pivotbolt (4) and bolt (9) positions. (d) Remove the cotter-pins (7), the nuts (6), the washers (5) and the bolts (9) that attach the door links (8) to the outboard brackets. Discard the cotter-pins (7). P.Blk EFFECTIVITY: FED ALL 27-80-19-04 Page 3 of 38 Printed - Date: 11/29/2012 Time: 11:13:51 Copyright © 2012 FedEx Express Corporation, Memphis TN, 38194, All rights reserved. JAN 16/2012 (e) Remove the cotter-pins (1), the nuts (2), the washers (3) and the bolts (4) that attach the door hinge assemblies to Ribs 2A and 2B. Discard the cotter-pins (1). (f) Remove the hinged door. (3) Installation (Ref. Fig. 401,402) (Ref. Fig. 403) (Ref. Fig. 404) (a) Manually move the Krueger flap to get access to the hinged door pivot-bolt (4) and (9) positions. Apply a layer of grease (Material No. 04-004) to the hinged door pivot-bolts (4) and put the hinged door in position, between the Ribs 2A and 2B. Install the hinged door with the pivot-bolts (4), the washers (3) and the nuts (2). Safety with new cotter-pins (1). Make sure that the door moves freely about the hinge axis. (b) Engage the eye-ends of the door link (8) onto the outboard bracket. Apply a layer of grease (Material No. 04-004) to the bolts (9). Install the bolts (9), the washers (5) and the nuts (6), to the outboard bracket (c) TORQUE the nuts (6) to between 31 and 40 lbf.in (0.35 and 0.45 m.daN) and safety with new cotter- pins (7). (d) Manually move the Krueger flap and align the actuator rod eye-end (36) with the outboard bracket assy. Apply a layer of grease (Material No. 04-004) to the sliding bushes (34) and the bolt (35). Install the sliding bushes (34) in the outboard bracket assy then install the bolt (35) through the inboard lug of the outboard bracket assy and the actuator rod eye-end (36). CAUTION: THE BOLT (35) HEAD MUST BE ON THE INBOARD LUG OF THE OUTBOARD BRACKET ASSY. (e) Install the nut (38) and use the wrench tool PN SL90.374-0.8750 to TORQUE the nut (38) to between P.Blk EFFECTIVITY: FED ALL 27-80-19-04 Page 4 of 38 Printed - Date: 11/29/2012 Time: 11:13:51 Copyright © 2012 FedEx Express Corporation, Memphis TN, 38194, All rights reserved. JAN 16/2012 75 and 90 lbf.ft (10.17 and 12.20 m.daN) (Ref. 20-21-16, P. Block 001) . (f) Install the lockwasher (37) then use the installation tool PN SL90.313-0.8750 to lock the lockwasher (37) (Ref. 20-21-16, P. Block 001) . WARNING: IF THE SELECTOR SOLENOID IS USED TO RETRACT THE KRUEGER FLAP, IT WILL CAUSE THE AILERON TO RISE BY 10 DEGREES. (g) Make sure that the into and out-of-wind tolerances are correct (Ref. Fig. 403,404) . If necessary, remove the screws (10) and the door skin (for access). Adjust the shims as applicable, then install the door skin with the screws (10). (4) Preparation for test (a) Remove the safety clips and tags and close the SLATS and KRUEGER circuit breakers on panel 127VU, line 704. (5) Test (a) Do the test that follows: ACTION RESULT 1. On the flight compartment center-pedestal: The Krueger flap, the folding nose and the hinged -Put the slat and flap door operate and extend smoothly and lock in the ontrol-lever in extended position. position 15 (gate 2). The Krueger flap, the folding nose and the hinged -Put the slat and flap door operate and etract smoothly and lock in the control-lever in closed position, with the Krueger flap and the position 0 (gate 1). hinged door in wing alignment. P.Blk EFFECTIVITY: FED ALL 27-80-19-04 Page 5 of 38 Printed - Date: 11/29/2012 Time: 11:13:51 Copyright © 2012 FedEx Express Corporation, Memphis TN, 38194, All rights reserved. JAN 16/2012 (6) Close-up (a) Depressurize the Green hydraulic system (Ref. 29-21-00) or (Ref. 29-10-00, P. Block 301) . (b) De-energize the aircraft electrical network (Ref. 24-41-00, P. Block 301) . (c) Remove the safety clips and tags and close the FLAPS circuit breakers on panel 127VU, line 705. (d) Remove the warning notices. (e) Remove the access platform. (f) Make sure that the work area is clean and clear of tools and miscellaneous items of equipment. 3. Folding Nose A. Equipment and Materials ITEM DESIGNATION A. Access Platform 4 m (13 ft) B. Circuit Breaker Safety Clips and Tags C. Torque Wrench 12 to 22 lbf.ft (1.6 to 3.0 m.daN) D. Warning Notices Prohibiting Use of Slats and Krueger Flap Systems E. SL90.313-0.4375 Installation Tool F. SL90.314-0.4375 Removal Tool G. SL90.374-0.4375 Wrench Tool H. 98A27808011000 Rigging Pin - Krueger Flap J. Cotter Pins K. Material No. 04-004 Common Greases (Ref. 20-31-00, P. Block 001) Referenced Procedures - (Ref. 20-21-16, P. STA LOK Nuts and Lockwashers Block 001) P.Blk EFFECTIVITY: FED ALL 27-80-19-04 Page 6 of 38 Printed - Date: 11/29/2012 Time: 11:13:51 Copyright © 2012 FedEx Express Corporation, Memphis TN, 38194, All rights reserved. JAN 16/2012 ITEM DESIGNATION - (Ref. 20-28-11, P. Electrical Bonding Block 001) List of Materials Required for Aircraft - (Ref. 20-31-00, P. Service and Maintenance Block 001) - (Ref. 24-41-00, P. AC External Power Control Block 301) - (Ref.