# Bombardier Service Bulletin 60-57-7 Copy: No revision named ("U.S. DOT/FAA - SB 60-57-7"), 19 pages: PDF https://openairdocs.org/files/sha256/6c/0f/6c0f0260591d2e5ef40044463cf9cc8938a7b2a7795a0dcbd17c4a65e2a758f5; text https://openairdocs.org/service-documents/bombardier/sb-60-57-7/file/6c0f0260591d.md. Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2013-0214; AD 2013-13-09 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. ## Details - Manufacturer: [Bombardier](https://openairdocs.org/service-documents/bombardier.md) - Type: Service bulletin (Service Bulletin) - Number: 60-57-7 - Page: https://openairdocs.org/service-documents/bombardier/sb-60-57-7 ## ADs that cite it (1) (OpenAirDocs) Newest first, with the revision each names, as OpenAirDocs read it from the AD's text. - [AD 2013-13-09](https://openairdocs.org/ad/2013-13-09.md), effective Aug 6, 2013: No revision named Also cited in [1 proposed AD](https://openairdocs.org/service-documents/bombardier/sb-60-57-7/proposed.md). ## Text (19 pages) Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2013-0214; AD 2013-13-09 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. Some pages are OCR from a scan. OCR can misread letters and numbers. Each page's text from the PDF; open the PDF at a page with #page=N. ### Page 1 b 2 THIS PUBLICATION IS AVAILABLE AT: www.cic.bombardier.com Refer to applicable government agency regulations and requirements and make sure that the work described in this publication is performed in compliance with manufacturer’s recommendations and/or acceptable industry standards. This document is proprietary to Bombardier Inc. and/or its affiliates and may not be reproduced or copied in any form or by any means without the prior written consent of Bombardier Inc. and/or its affiliates. © 2012, Bombardier Inc. All rights reserved. Challenger*, Global Express*, Learjet*, are Trademarks of Bombardier Inc. SB 60-57-7 Recommended Page 1 of 19 Basic Issue: Jul 23/12 Contact Information Distribution Date Business Aircraft Learjet Inc. MS 53 P.O. Box 7707 Wichita, Kansas 67277-7707 Customer Response Center (CRC) 1-866-538-0247 (Toll Free) (316) 946-6100 (Tel) Push 2 for Parts Services or push 4 then push 1 for Technical Publications. July 23, 2012 LEARJET 60 If you cannot complete the instructions in this publication because of an STC change to the aircraft, speak to the STC holder or the regional Federal Aviation Administration (FAA) office for information and disposition. Service Bulletin These commodities, technology or software were exported from the United States in accordance with the Export Administration Regulations. Diversion contrary to United States law is prohibited. SB 60-57-7 Recommended WINGS - INSTALLATION OF THE MAIN LA NDING GEAR ANTI-SKID VALVE SHIELDING IMPROVEMENTS 1. Planning Information A. Effectivity (1) Learjet 60-001 thru 60-413. B. Reason (1) To improve the protective shielding of the anti-skid system components located in the main landing gear wheel well. C. Description (1) This service bulletin provides inst ructions to modify and install prot ective shielding to the anti-skid system in the main landing gear wheel well. ### Page 2 THIS PUBLICATION IS AVAILABLE AT: www.cic.bombardier.com SB 60-57-7 Recommended Page 2 of 19 Basic Issue: Jul 23/12 LEARJET 60 Service Bulletin D. Compliance (1) Recommended - Bombardier Learjet Inc. recommend s that you complete these instructions in less than 600 flight hours or less than 24 months from the initial distribution da te of this publication, whichever comes first. E. Approval (1) The Federal Aviation Administration (FAA) has ap proved the technical content in this publication that has an effect on the airplane type design. (2) The European Aviation Safety Agency (EASA) has accepted the technical content in this publica- tion that has an effect on the airplane type design. F. Labor Hours - Estimated Accomplishment Time NOTE: These labor hours are an estimate and ar e for planning purposes only. Facility and per- sonnel capabilities may cause the labor hours to change. When planning to complete these instructions, please contact Bombardier Aerospace, Learjet Inc. Business Aircraft Customer Service, Parts Logi stics for parts availability and shipping times as necessary. (Refer to the title page of this document for contact informa- tion.) G. Expense Coverage (1) Labor Coverage (a) Aircraft in the Learjet manufactured warranty period, labor coverage is provided. NOTE: For labor coverage to apply, you must complete these instructions at a Bombar- dier Business Aviation Service Facility or at a Bombardier Learjet Authorized Ser- vice Facility. You must complete these instructions within 24 months from the Basic Issue date of this publication. (b) Aircraft out of the Learjet manufactured warranty period, no labor coverage is provided. (2) Material Coverage - Material coverage applies to all aircraft affected by this publication. NOTE: For material coverage to apply, you must place an order for this kit from Bombardier Learjet within 12 months from the Basic Issue distribution date of this publication. LABOR HOURS TASK 2.0 Labor hours to gain access. 16.0 Labor hours to do the aircraft modification. 4.0 Labor hours to do a functi onal test/operational check. 2.5 Labor hours to return the aircraft to airworthy status. 24.5 Total Labor Hours ### Page 3 THIS PUBLICATION IS AVAILABLE AT: www.cic.bombardier.com SB 60-57-7 Recommended Page 3 of 19 Basic Issue: Jul 23/12 LEARJET 60 Service Bulletin (3) Smart Parts Plus Coverage (a) During or after the above free period, Smart Parts Plus does not pay for the kit. H. Material Required NOTE: The above price can change. For prices, availability, orderin g and shipping info rmation, please ca ll Bombardier Aero- space, Learjet Inc. Business Aircraft Customer Service, Parts Logistics. (Refer to the title page of this document for contact information.) (1) Other materials/parts that may be nec essary to complete these instructions. NOTE: * This part is required for aircraft that have convex (round) landing light lamps installed. The convex (round) landing light will not clear the new shielding installed by this modification. For ordering and shipping information, please contact Bombardier Aerospace, Learjet Inc., Business Aircraft Customer Service, Pa rts Logistics. (Refer to the title page of this document for contact information.) I. Tools and Equipment (1) Refer to Chapter 29 of the Maintenance Manual , Safety Practices, Chapter 7 of the Maintenance Manual, Jacking the Aircraft and Chapter 12 of the Maintenance Manual , Service the Hydraulic Reservoir. PART NUMBER QTY NOMENCLATURE PRICING 6032040001-801 1 Service Bulletin Kit $17,960.00 PART NUMBER NOMENCLATURE QTY SUPPLIER A/KQ4681 or Q4681 (* See Note) Landing Light Lamp (Flat) As Required Amglo Kemlite Inc. Largo, FL 33733 MS35206-233 (* See Note) Screw As Required Obtain Locally PART NUMBER NOMENCLATURE SUPPLIER USAGE N/A 0.1660 inch Reamer Obtain Locally Open Drilled Holes ### Page 4 THIS PUBLICATION IS AVAILABLE AT: www.cic.bombardier.com SB 60-57-7 Recommended Page 4 of 19 Basic Issue: Jul 23/12 LEARJET 60 Service Bulletin J. Weight and Balance (1) Change in basic weight and moment for aircraft that do the landing light change. (2) Change in basic weight and moment for airc raft that do not do the landing light change. K. References NOTE: If applicable, referenced third party documentation can be found by opening the attach- ment tab in the Adobe Acrobat Reader software. (1) Service Bulletin Co mpliance Response Form. (2) Service Bulletin Evaluation Sheet. (3) Learjet Maintenance Manual, Chapters 7, 12, 20, 24, 29 and 33. L. Other Publications Affected (1) Learjet Illustrated Part s Catalog, Chapter 57. 2. Material Information A. Parts Required (1) The 6032040001-801 kit contains the parts that follow: CHANGE IN BASIC WEIGHT CHANGE IN BASIC MOMENT Plus (+) 2.00 pounds Plus (+) 779.10 inch-pounds CHANGE IN BASIC WEIGHT CHANGE IN BASIC MOMENT Plus (+) 1.78 pounds Plus (+) 692.70 inch-pounds PART NUMBER QTY NOMENCLATURE ALTERNATEPART NUMBER AN525-832R7 8 Screw AN525-832R9 20 Screw MS20470AD3-6 8 Rivet MS21042-08 26 Nut MS21042-3 4 Nut MS21266-2N 2 Grommet MS21919WDG4 6 Clamp MS27039-1-23 8 Screw NAS1149F0316P 4 Washer NAS1149F0332P 22 Washer NAS1149FN832P 2 Washer NAS1801-3-8 16 Screw NAS1801-08-10 2 Screw ### Page 5 THIS PUBLICATION IS AVAILABLE AT: www.cic.bombardier.com SB 60-57-7 Recommended Page 5 of 19 Basic Issue: Jul 23/12 LEARJET 60 Service Bulletin NOTE: Some hardware comes in pre-packaged quantities. When that occurs, the quantity in the kit will be more than the quantity in the parts list. B. Parts Removed List S-151-1 4 Bracket Assembly 5418401-033 2 Strap 6029109002-005 1 Shield, Anti-Skid, LH 6029109002-003 6029109002-006 1 Shield, Anti-Skid, RH 6029109002-004 6029109003-001 1 Bracket Assembly, Upper Inboard, LH 6029109003-002 1 Bracket Assembly, Upper inboard, RH 6029109004-005 4 Bracket Assembly, Upper Outboard 6029109006-001 2 Bracket Assembly, Lower inboard 6032040001-811 2 Cover, Electrical, Forward 6032040001-812 1 Cover, Electrical, Aft, LH 6032040001-813 1 Cover, Electrical, Aft, RH 6032040001-816 1 Rayrim Edge Protection (No. 7, 15 in [38.1 cm].) PART NUMBER QTY NOMENCLATURE DISPO-SITION EFFECTIVITY REPLACEDBY 2448000-42 6 Strap Destroy When Installed Not Replaced 5418401-22 6 Strap Destroy When Installed Not Replaced 5418401-033 2 Strap Destroy 60-313 and Subsequent 5418401-033 MS21919WDG14 2 Clamp Destroy When Installed Not Replaced HL70-6 4 Hi-Lok Collar Destroy All MS21042-3 GE-4580 2 Landing Light (Convex) Destroy When Installed A/KQ4681 or Q4681 2484021-16 2 Landing Light Cover Destroy When Installed Not Replaced 2484108-801 2 Landing Light Cover Destroy When Installed Not Replaced 51-0723-1 2 Grille Assembly Destroy When Installed Not Replaced PART NUMBER QTY NOMENCLATURE ALTERNATEPART NUMBER ### Page 6 THIS PUBLICATION IS AVAILABLE AT: www.cic.bombardier.com SB 60-57-7 Recommended Page 6 of 19 Basic Issue: Jul 23/12 LEARJET 60 Service Bulletin C. Identification Table NOTE: * There is no direct spares replacement available. For spares replacement, order part number shown prior to the modification, and match drill hole pattern to current aircraft configuration. 3. Accomplishment Instructions A. Gain Access NOTE: The instructions that follow are for both the left and right main landing gear. (1) Put the aircraft on jacks. (Refer to Chapter 7 of the Maintenance Manual.) (2) Set the battery switches off and disconnect the aircraft batteries. (Refer to Chapter 24 of the Main- tenance Manual.) (3) Depressurize the aircraft hydraulic system. (Refer to Chapter 12 of the Maintenance Manual.) (4) Lower the inboard main landing gear door as follows: (a) Override the inboard main landing gear door uplock actuator using a screwdriver to release the uplock hook. (b) Using another person, pump the brake pedals while pulling inboard gear door to the down position. (5) Disconnect the inboard main landing gear door from the door actuator. Retain attaching hardware for installation. NAS43DD1-16 8 Spacer Destroy When Installed Not Replaced AN515-6R20 8 Screw Destroy When Installed MS35206-233 PART NUMBER NOMENCLATURE IDENTIFY TO SPARESREPLACEMENT EFFECTIVITY 12225-0065-085 Forward Stiffener, LH 6032040001-802 (* See Note) When Installed 12225-0065-086 Forward Stiffener, RH 6032040001-803 (* See Note) When Installed 12225-0065-089 Forward Stiffener, LH 6032040001-804 (* See Note) When Installed 12225-0065-090 Forward Stiffener, RH 6032040001-805 (* See Note) When Installed 12225-0065-027 Aft Stiffener, LH 6032040001-806 (* See Note) All 12225-0065-028 Aft Stiffener, RH 6032040001-807 (* See Note) All 6032040001-811 Forward Electrical Cover 6032040001-808 (* See Note) All 6032040001-812 Aft Electrical Cover, LH 6032040001-809 (* See Note) All 6032040001-813 Aft Electrical Cover, RH 6032040001-810 (* See Note) All PART NUMBER QTY NOMENCLATURE DISPO-SITION EFFECTIVITY REPLACEDBY ### Page 7 THIS PUBLICATION IS AVAILABLE AT: www.cic.bombardier.com SB 60-57-7 Recommended Page 7 of 19 Basic Issue: Jul 23/12 LEARJET 60 Service Bulletin B. Modification of Aircraft NOTE: The instructions that follow are for both the left and right main landing gear. (1) Install the outboard bracket assemblies on the aircraft (Wing Spar No. 5) as follows: (See Figure 1, Detail A and View B-B.) (a) Remove and discard the existing screws and wa shers that attach the upper and lower shuttle valves to the aircraft. NOTE: Do not disconnect the hydraulic lines from the upper and lower shuttle valves. (b) If necessary, open pilot holes in the outboard bracket assemblies to a No. 10 (0.194 in) [4.92 mm] drill size. (c) Secure the outboard bracket assemblies to the upper and lower shuttle valves using new screws and washers. (2) Install the anti-skid shield as follows: (a) Attach grommet to the anti-skid shield. (See Figure 1, Detail A.) (b) If necessary, open pilot holes in the anti-skid shield to 0.219 in [5.56 mm] diameter. (c) Temporarily install the anti-skid shie ld to the outboard bracket assemblies. (d) Trim the edge of the anti-skid shield as necessa ry to clear anti-skid valve and adjacent tubing. NOTE: Make sure to maintain minimum cleara nce of 1/4 inch (0.25 in) [6.35 mm] with adjacent tubing. (e) Deburr and apply alodine and epoxy primer to bare metal surfaces. (Refer to Chapter 20 of the Maintenance Manual.) (f) Install the anti-skid shield to the outboard bracket assemblies with fasteners. (3) Locate and install the forward electrical co ver on the forward stiffener as follows: (See Figure 1 , Detail A and View E-E.) (a) Remove the existing clamps and screws that se cure the electrical wire harnesses to the for- ward stiffener. (b) Position the new electrical cover on the forward stiffener. (See Figure 1, View E-E.) (c) Use a marker to transfer the hole pattern fo r the aft outboard fasteners that secures the for- ward electrical cover. (d) Remove the cover and drill two 0.166 in [4.21 mm] dia. holes at the marked location. (See Fig- ure 1, View E-E and Detail F.) (e) Temporarily install the forward electrical cover to the forward stiffener at the aft hole locations. (f) Match drill a third hole location at the forw ard outboard location pe rpendicular to the hole located on the opposite side of the stiffener. NOTE: Make sure to maintain minimum edge distance of 0.30 in [7.62 mm] when locating and drilling the holes through the cover and forward stiffener. (g) Remove the forward electrical cover from the aircraft. (h) Locate and drill two 0.17 7 in [4.49 mm] dia. holes in the forward electrical cover for electrical wire harness clamp installation. (See Figure 1, Detail G.) (i) Deburr all drilled hole locations. (Refer to Chapter 20 of the Maintenance Manual.) (j) Apply alodine and epoxy primer to all drilled holes. (Refer to Chapter 20 of the Maintenance Manual.) (k) Identify the forward stiffener. (See Paragraph 2.C.) (l) Install clamps and attaching hardware to secure the electrical wire harness to the forward elec- trical cover. ### Page 8 THIS PUBLICATION IS AVAILABLE AT: www.cic.bombardier.com SB 60-57-7 Recommended Page 8 of 19 Basic Issue: Jul 23/12 LEARJET 60 Service Bulletin (m) Install the forward electrical co ver to the aircraft at the three mounting locations using supplied hardware. (4) Install the upper inboard bracket assembly as follows: (See Figure 1, Detail C.) (a) Temporarily install the upper inboard bracket assembly to the shield assembly with the pro- vided hardware. (b) Make sure the upper bracket assembly is positioned along the forward side of the forward stiff- ener. (c) On aircraft that have an existing hole location in the stiffener for mounting the upper inboard bracket, do as follows: 1) Make sure the hole location provides for mi nimum edge distance of 0.30 in [7.62 mm] with the upper inboard bracket. 2) If minimum edged distance cannot be obtained, proceed to Step 3.B.(4)(d). 3) If minimum edged distance can be obtained, use a marker to mark a hole location to secure the upper inboard bracket assembly to the stiffener. NOTE: Make sure to maintain a minimum edge distance of 0.30 in [7.62 mm]. (See Figure 1, Detail C.) 4) Drill a 0.166 in [4.21 mm] hol e through the upper inboard bracket assembly, the electrical cover, and the stiffener at the marked location. (d) On aircraft that do not have an existing hole location in the stiffener for mounting the upper inboard bracket or where the hole location does not provide for minimum edge distance, do as follows: 1) Use a marker to mark a new hole location to secure the upper inboard bracket assembly to the stiffener. NOTE: Make sure to maintain a minimum edge distance of 0.30 in [7.62 mm]. (See Figure 1, Detail C.) 2) Drill a 0.166 in [4.21 mm] hol e through the upper inboard bracket assembly, the electrical cover, and the stiffener at the marked location. (e) Remove the upper inboard bracket assembly an d forward electrical cover from the aircraft. (f) Deburr drilled hole lo cations. (Refer to Chapter 20 of the Maintenance Manual.) (g) Apply alodine and epoxy primer to drilled holes. (Refer to Chapter 20 of the Maintenance Man- ual.) (h) Identify the forward electrical cover. (See Paragraph 2.C.) (i) Install the forward electrical cover and upper inboard bracket assembly using provided hard- ware. (5) Install clamps that support elec trical wire harness as it routes inboard along the forward stiffener using provided hardware. (6) Install the lower inboard bracket assembly as follows: (See Figure 1, Detail A and View D-D.) (a) Temporarily position the lower inboard bracket assembly to the shield assembly and locate the Hi-Loc fasteners where the inboard bracket assemb ly is to be installed (two places on the lower wing spar). (b) Remove the Hi-Loc fastener collars from the win g spar where the inboard bracket assembly is to be installed. (c) If necessary, use a No. 2 drill size, to enlarg e the holes in the lower inboard bracket assembly to 0.221 in [5.61 mm]. (d) Deburr all drilled hole locations. (Refer to Chapter 20 of the Maintenance Manual.) (e) Apply alodine and epoxy primer to drilled holes. (Refer to Chapter 20 of the Maintenance Man- ual.) (f) Install the shield to the lower in board bracket assembly as follows: ### Page 9 THIS PUBLICATION IS AVAILABLE AT: www.cic.bombardier.com SB 60-57-7 Recommended Page 9 of 19 Basic Issue: Jul 23/12 LEARJET 60 Service Bulletin 1) With the shield assembly lo osely installed, visually check the lower inboard bracket mounting hole location for alignment with the anti-skid shield. 2) If holes do not align, mark a new hole location on the anti-skid shield. 3) Slot or relocate the lower inboard hole in th e anti-skid shield as necessary to attach the anti-skid shield to the lower inboard bracket. Hole to be 7/32 (0.219) in [5.56 mm] diame- ter. Slot to be a maximum width of 0.50 in [12.70 mm]. 4) Deburr all drilled and/or slotte d holes and apply alodine and epoxy primer to all bare metal surfaces. (Refer to Chapter 20 of the Maintenance Manual.) 5) Install the anti-skid shield to the lower bracket support. (7) Modify the aft stiffener for new electr ical wire harness support as follows: (See Figure 1, Detail A and View G-G.) (a) Remove the existing three outboard straps that support the electrical wire harness inside the aft stiffener. Discard existing attaching hardware and straps. (b) On aircraft 60-001 thru 60-312, do the steps that follow: 1) Remove the existing inboard clamp and attach ing hardware that support the electrical wire harnesses as they route inboard along the aft stiffener. Discard clamp and attaching hard- ware. 2) As necessary, remove electrical wire harnesses away from the aft stiffener to allow for installation of the S-151-1 brackets. 3) Install the S-151-1 bracket assemblies on the aft stiffener. (See Figure 1 View K-K.) 4) Identify the aft stiffener. (See Paragraph 2.C.) (c) On aircraft 60-313 thru 60-413 , remove and discard the existing inboard strap and attaching hardware. (8) Locate and install the aft electrical cover and strap on the aft stiffener as follows: (See Figure 1 Detail A and View G-G.) (a) Install rayrim edge protection on the strap. (b) Position the anti-skid wheel and squat switch elec trical wire harnesses back inside the aft stiff- ener. (c) Secure wire harnesses in the aft stiffener using strap and supplied hardware. (d) Position the new aft electric al cover on the aft stiffener. NOTE: When locating the right aft electrical cover, make sure the louver faces aft. (e) Use a marker to transfer the (s ix) (6) hole pattern of the stiffener onto the aft electrical cover. (f) Remove the aft electrical cover from the aircraft. (g) Drill six (6) 0.166 in [4.21 mm] dia. holes at the marked locations on the aft electrical cover. (h) Deburr all drilled hole locations. (Refer to Chapter 20 of the Maintenance Manual.) (i) Apply alodine and epoxy primer to all drilled holes. (Refer to Chapter 20 of the Maintenance Manual.) (j) Install rayrim edge protection to the edge of the aft electrical cover. NOTE: Make sure to install the rayrim edge protection to the louvered portion of the right aft electrical cover. (k) As necessary for fit, remove the tie wraps from the area of the electric al wire harnesses cov- ered by the new aft electrical cover. ### Page 10 THIS PUBLICATION IS AVAILABLE AT: www.cic.bombardier.com SB 60-57-7 Recommended Page 10 of 19 Basic Issue: Jul 23/12 LEARJET 60 Service Bulletin (l) Make sure the holes in the stiffener are large enough for the shank on the AN525-832R9 screws used to install the cover to pass through the stiffener. 1) If the holes in the stiffener are large enough to install all screws, proceed to Step 3.B.(8)(m). 2) If the holes are not large enough, use a 0.166 in [4.216 mm] reamer to open the holes in the stiffener. NOTE: Make sure that the nutplate is not damaged when hole is opened with reamer. 3) Apply alodine and epoxy primer to all bare metal. (Refer to Chapter 20 of the Maintenance Manual.) (m) Install the new aft electrical cover on the aircraft. (n) Identify the aft electrical cover. (See Paragraph 2.C.) (9) On aircraft with a convex (round) shape landing light lamp (P/N GE-4580) and/or a protective land- ing light lens cover installed, do as follows: NOTE: During main landing gear retraction, the convex (round) shape landing light assembly and/or protective lens cover will not clear th e new shielding provided by this modifica- tion. (a) Remove the protective landing light lens co ver, attaching screws, spacers and nuts. Discard attaching screws, spacers and lens cover. Retain the nuts for installation. (Refer to Chapter 33 of the Maintenance Manual.) (b) Remove and discard the convex (round) landing light lamp. (Refer to Paragraph 1.H.(1) for landing light lamp parts required.) (Refer to Chapter 33 of the Maintenance Manual.) (c) Install the new flat landing light lamp with MS35206-233 screws and retained nuts. (Refer to Paragraph 1.H.(1) for landing light lamp parts required.) (Refer to Chapter 33 of the Mainte- nance Manual.) (10) Make sure all electrical wire harnesses affect ed by this modification have been secured and sup- ported. (11) Make sure all hardware used to install the shield assembly, brackets and straps have been tight- ened to the proper torque values. (Refer to Chapter 20 of the Maintenance Manual.) C. Functional Test/Operational Check (1) Use retained attaching hardware to connect the inner main landing gear door to the door actuator. (2) Disconnect the outer main landing gear door push rod from the main landing gear strut assembly. Retain attaching hardware for installation. (3) Connect the batteries to the aircraft. (Refer to Chapter 24 of the Maintenance Manual.) (4) Connect external hydraulic power source to the aircraft. (Refer to Chapter 29 of the Maintenance Manual.) (5) Pressurize the aircraft hydraulic system. (Refer to Chapter 29 of the Maintenance Manual.) NOTE: Apply hydraulic pressure to the gear incrementally starting at zero (0) PSI and increase cart pressure slowly to cycle the landing gear. WARNING: USE EXTREME CARE WHEN LANDING GEAR IS RETRACTED AND EXTENDED. MAKE SURE TO OBSERVE FROM AN ADEQUATE DISTANCE AND KEEP ALL BODILY PARTS OUT OF THE WAY OF ALL LANDING GEAR AND LANDING GEAR DOORS. FAILURE TO KEEP SAFE DISTANCE CAN RESULT IN PER- SONAL INJURY OR DAMAGE TO THE AIRCRAFT. ### Page 11 THIS PUBLICATION IS AVAILABLE AT: www.cic.bombardier.com SB 60-57-7 Recommended Page 11 of 19 Basic Issue: Jul 23/12 LEARJET 60 Service Bulletin (6) Slowly retract and extend the main landing gear and check for clearance between the landing light lens, hydraulic lines and electrical wire harn esses with the new shielding. (Refer to Chapter 32 of the Maintenance Manual.) (7) Use retained attaching hardware to connect the outer main landing gear door push rod to the main landing gear strut assembly. D. Return Aircraft to Airworthy Status (1) With the landing gear fully extended and locked, remove aircraft from jacks. (Refer to Chapter 7 of the Maintenance Manual.) (2) Unless already done, connect the batteries to the aircraft. (Refer to Chapter 24 of the Maintenance Manual.) E. Compliance Response Form (1) Complete the compliance response form. (2) Send the compliance response form to Learjet Inc. as soon as possible. F. Aircraft Maintenance Records (1) Complete the Aircraft Maintenance Records in accordance with the regulatory requirements of your aircraft certification authority. G. General Information (1) The table below lists standard tolerances wh ich shall apply to dimensions defined within the instructions or illustrations of this document that do not have specified tolerances. UNLESS OTHERWISE SPECIFIED ALL TOLERANCES ARE AS FOLLOWS: DECIMALS ANGLES 0.0 ± 0.1 [0.0 mm ± 2.54 mm] 0.00 ± 0.03 [0.00 mm ± 0.76 mm] 0.000 ± 0.010 [0.000 mm ± 0.254 mm] MACHINED FORMED ± 0°30’ ± 2 ° ### Page 12 (OCR) LEARJET 60 Service Bulletin UPPER INBOARD BRACKET ASSEMBLY 6029109003-001 (LH) UPPER OUTBOARD 6029109003-002 (RH) BRACKET ASSEMBLY (1 REQUIRED) 6029109004-005 STIFFENER (1 REQUIRED, (REF) B UPPER LOCATION) E G GROMMET MS21266-2N (1 REQUIRED) SCREW NAS1801-3-8 SCREW LOWER INBOARD WASHER AN525-832R9 BRACKET ASSEMBLY NAS1149F0332P (1 REQUIRED) 6029109006-001 (7 EACH REQUIRED) (1 REQUIRED) SCREW MS27039-1-23 LOWER OUTBOARD WASHER NAS1149F0332P (4 EACH REQUIRED) (1 REQUIRED, BRACKET ASSEMBLY 6029109004-005 6029109002-005 (LH) •ANTI-SKID SHIELD 6029109002-006 (RH) LOWER LOCATION) (1 REQUIRED) UP INBDI (VIEW LOOKING FORWARD FROM INSIDE THE LH MLG WHEEL WELL) LEFT MAIN LANDING GEAR SHOWN) NOTE Notes information is found on Detail A the last sheet of the figure. K60-605707-001-01 Installation of the Main Landing Gear Shielding Improvements Figure 1 (Sheet 1 of 8) Basic Issue: Jul 23/12 THIS PUBLICATION IS AVAILABLE AT: SB 60-57-7 www.cic.bombardier.com Recommended Page 12 of 19 ### Page 13 (OCR) LEARJET 60 Service Bulletin BRAKE SHUTTLE HYDRAULIC OUTBOARD VALVE FUSE BRACKET ASSEMBLY (REF) , (REF) 6029109004-005 (REF) ANTI-SKID SHIELD 6029109002-005 (LH) БОЯ 6029109002-006 (RH) (REF) UPPER INBOARD BRACKET ASSEMBLY FWD (REF) 6029109003-001 (LH) 6029109003-002 (RH) FORWARD STIFFENER (REF) INBDI ELECTRICAL COVER View B-B (REF) STIFFENER SHIELD (REF) ASSEMBLY (REF) UPPER INBOARD BRACKET ASSEMBLY (REF) FORWARD ELECTRICAL NUT COVER MS21042-08 (REF) (1 REQUIRED) 2 (BRACKET ASSEMBLY INSTALLATION ON STIFFENER) NOTE Detail C Notes information is found on the last sheet of the figure. K60-605707-001-02 Installation of the Main Landing Gear Shielding Improvements Figure 1 (Sheet 2 of 8) Basic Issue: Jul 23/12 THIS PUBLICATION IS AVAILABLE AT: SB 60-57-7 www.cic.bombardier.com Recommended Page 13 of 19 ### Page 14 (OCR) LEARJET 60 Service Bulletin 5 LOWER INBOARD BRACKET ASSEMBLY LOWER 6029109006-001 SPAR CAP (REF) (REF) 4.80 in [12.19 cm] 0.41 in [10.41 mm] WASHER FWD NAS1149F0316P NUT ANTI-SKID INBDD MS21042-3 SHIELD (2 EACH REQUIRED) (REF) View D-D NOTE Notes information is found on the last sheet of the figure. K60-605707-001-03 Installation of the Main Landing Gear Shielding Improvements Figure 1 (Sheet 3 of 8) Basic Issue: Jul 23/12 THIS PUBLICATION IS AVAILABLE AT: SB 60-57-7 www.cic.bombardier.com Recommended Page 14 of 19 ### Page 15 (OCR) LEARJET 60 Service Bulletin FWD ELECTRICAL > UPPER, COVER INBOARD 6032040001-811 WIRE BRACKET (1 REQUIRED) BUNDLE ASSEMBLY (REF) (REF) ANTI-SKID SHIELD DRILL HOLE (REF) 0.030 in 0.166 in [4.216 mm] [0.762 mm] SCREW (REF) AN525-832R9 NUT MS21042-08 EXISTING (1 EACH REQUIRED; HOLE 3 PLACES) (REF) NUT FWD 13.00 in MS21042-08 STIFFENER [33.02 cm] (1 REQUIRED) (REF) (REF) CLAMP MS21919WDG4 SCREW FWD NAS1801-08-10 WASHER GOUTBD NAS1149FN832P AFT (1 EACH REQUIRED) STIFFENER EXISTING HOLE (REF) IN STIFFENER (REF) SCREW AN525-832R9 NUT MS21042-08 (1 EACH REQUIRED) (LOOKING DOWN THRU WING INSIDE WHEEL WELL) (LH SHOWN, RH TYPICAL EXCEPT AS NOTED) (WING SKIN AND STRUCTURE NOT SHOWN FOR CLARITY) NOTE View E-E Notes information is found on the last sheet of the figure. K60-605707-001-04 Installation of the Main Landing Gear Shielding Improvements Figure 1 (Sheet 4 of 8) Basic Issue: Jul 23/12 THIS PUBLICATION IS AVAILABLE AT: SB 60-57-7 www.cic.bombardier.com Recommended Page 15 of 19 ### Page 16 (OCR) LEARJET 60 Service Bulletin MOUTBD FWD DRILL 0.166 in [4.216 mm] HOLE AS MARKED FROM AFT SIDE OF [10.16 mm] → 0.40 in (2 PLACES) FWD STIFFENER 1.03 in [2.61 cm] 0.40 in [10.16 mm] DRILL HOLE 0.177 in [4.49 mm] THROUGH FWD ELECTRICAL COVER FWD (2 PLACES) FWD STIFFENER STIFFENER (REF) (REF) DRILL 0.166 in [4.216 mm] HOLES IN FWD SIDE OF FWD STIFFENER UPON INSTALLATION (2 PLACES) (FORWARD ELECTRICAL COVER HOLE LOCATIONS) (VIEW LOOKING UP AS INSTALLED, LH SHOWN, RH TYPICAL) Detail F K60-605707-001-05 Installation of the Main Landing Gear Shielding Improvements Figure 1 (Sheet 5 of 8) Basic Issue: Jul 23/12 THIS PUBLICATION IS AVAILABLE AT: SB 60-57-7 www.cic.bombardier.com Recommended Page 16 of 19 ### Page 17 (OCR) LEARJET 60 Service Bulletin FWD AFT STRAP SCREW STIFFENER STIFFENER 5418401-033 AN525-832R7 (REF) (REF) WIRE (REF) WASHER BUNDLE AN960-8 (REF) (1 EACH REQUIRED, 2 PLACES) WIRE K- BUNDLE (REF) SCREW AN525-832R9 K- NUT MS21042-08 6.25 in (1 EACH REQUIRED, BRACKET [15.87 cm] 6 PLACES) ASSEMBLY (REF) S-151-1 FWD (REF) IOUTBD (LOOKING DOWN THRU WING INSIDE WHEEL WELL) (LH SHOWN, RH TYPICAL EXCEPT AS NOTED) (WING SKIN AND STRUCTURE NOT SHOWN FOR CLARITY) View G-G INBD D INBD FWD WIRE FWD AFT BUNDLE LOUVER STIFFENER (REF) (REF) (REF) AFT STIFFENER > DRILL 0.166 in (REF) DRILL 0.166 in LEFT AFT [4.216 mm] HOLE [4.216 mm] HOLE (1 REQUIRED) ELECTRICAL COVER 6032040001-812 (6 PLACES) AND DEBURR RIGHT AFT ELECTRICAL COVER 6032040001-813 (6 PLACES) AND DEBURR AFT STIFFENER (1 REQUIRED) (REF) LEFT SIDE RIGHT SIDE AFT ELECTRICAL COVERS NOTE (MIEWS LOOKING UP AS INSTALLED) Notes information is found on the last sheet of the figure. Detail H K60-605707-001-06 Installation of the Main Landing Gear Shielding Improvements Figure 1 (Sheet 6 of 8) Basic Issue: Jul 23/12 THIS PUBLICATION IS AVAILABLE AT: SB 60-57-7 www.cic.bombardier.com Recommended Page 17 of 19 ### Page 18 (OCR) LEARJET 60 Service Bulletin UPPER INBOARD CLAMP BRACKET ASSEMBLY (REF) FWD STIFFENER MS21919WDG4 SCREW (REF) AN525-832R7 NUT MS21042-08 (1 EACH REQUIRED, 2 PLACES) WIRE BUNDLE - (REF) FWD FWD ELECTRICAL COVER (REF) (TYPICAL 2 PLACES) View J-J DRILL HOLE No. 40 BRACKET (0.098 in [2.489 mm]) ASSEMBLY DIAMETER S-151-1 2 PLACES, EACH IN STRAP (1 EACH REQUIRED, BRACKET ASSEMBLY 5418401-033 RIVET (1 REQUIRED) MS20470AD3-6 (2 REQUIRED, EACH BRACKET ASSEMBLY) INSTALL RAYRIM WIRE BUNDLE EDGE PROTECTION (REF) OF STRAPS TO BOTH SIDES AFT STIFFENER (REF) View K-K K60-605707-001-07 Installation of the Main Landing Gear Shielding Improvements Figure 1 (Sheet 7 of 8) Basic Issue: Jul 23/12 THIS PUBLICATION IS AVAILABLE AT: SB 60-57-7 www.cic.bombardier.com Recommended Page 18 of 19 ### Page 19 (OCR) LEARJET 60 Service Bulletin NOTES Use Class Il adhesive to bond grommet to the shield assembly. (Refer to Chapter 20 of the Maintenance Manual.) Position the upper bracket assembly on the stiffener as shown and mark the hole location. Maintain minimum edge distance and drill 0.166 in [4.216 mm] dia hole through the upper bracket assembly, forward electrical cover and forward stiffener. Maintain a 0.35 in [8.89 mm] edge distance on the bracket assembly and cover. Maintain a 0.30 in [7.62 mm] edge distance on the stiffener. Assemble bracket assembly to the shield assembly and install in place. Pick up two existing fastener locations on spar cap as shown and match drill through the bracket assembly. Remove existing Hi-Lok collar, install new nuts and torque nut 25 to 35 in/Ibs [2.82 to 3.95 Nm]. • Nut is required only if existing nutplate is not installed. Install 2.5 in [6.35 cm] Rayrim edge protection to louvered portion of the right aft electrical cover and make sure that the louver faces aft when the RH aft electrical cover is installed. Install Rayrim edge protection to the exposed edges of right and left aft electrical covers and straps. Trim edge of anti-skid shield as necessary to clear anti-skid valve and adjacent tubing. (0.25 in [6.35 mm] clearance required on adjacent tubing.) It is permissible to slot or relocate hole to attach anti-skid shield to lower inboard bracket assembly. If the holes are not large enough, use a 0.166 in [4.216 mm] reamer to open the holes in the stiffener. Make sure that the nutplate is not damaged when hole is opened with reamer. Apply alodine and epoxy primer to all bare metal. (Refer to Chapter 20 of the Maintenance Manual.) K60-605707-001-08 Installation of the Main Landing Gear Shielding Improvements Figure 1 (Sheet 8 of 8) Basic Issue: Jul 23/12 THIS PUBLICATION IS AVAILABLE AT: SB 60-57-7 www.cic.bombardier.com Recommended Page 19 of 19 --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). 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