# Bombardier Service Bulletin 40-25-25 Copy: Revision 3 ("U.S. DOT/FAA - SB 40-25-25 R3"), 13 pages: PDF https://openairdocs.org/files/sha256/37/08/3708c9fc4c7f78f587e295f6a1bfaeb0a415b4dbdcd41c4403123848c20ad383; text https://openairdocs.org/service-documents/bombardier/sb-40-25-25/file/3708c9fc4c7f.md. Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2013-0213; AD 2013-14-07 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: 40-25-25 - Latest revision known: 40-25-25, Revision 3, dated February 6, 2012 (OpenAirDocs) - Page: https://openairdocs.org/service-documents/bombardier/sb-40-25-25 ## ADs that cite it (1) (OpenAirDocs) Newest first, with the revision each names, as OpenAirDocs read it from the AD's text. - [AD 2013-14-07](https://openairdocs.org/ad/2013-14-07.md), effective Aug 26, 2013: Revisions 1, 2 and 3 Also cited in [1 proposed AD](https://openairdocs.org/service-documents/bombardier/sb-40-25-25/proposed.md). ## Text (13 pages) Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2013-0213; AD 2013-14-07 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. This text is 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 (OCR) BOMBARDIER LEARJET 40 RT 40-25-25 Revision Transmittal Sheet This page transmits Revision 3 to Service Bulletin No. 40-25-25, "Baggage Door Fire Seal Relocation." Rework: No rework is required for aircraft which have complied with previous issues of this document. Summary: This revision changes the effectivity in the Identification table for the tailcone baggage door assembly for Learjet 45-2125 to correspond to the correct part number and re-identification number. This revision also changes the Smart Parts Plus Coverage statement and updates kit pricing. NOTE: Change bars are placed in the left margin of pages where significant changes are located. This revision incorporates the latest document format for Learjet service instructions. The general arrangement of this document may change from the previous issue. Description of Changes In the Planning Information section: Changed the Material Required information section as follows: Updated the 4525530001-801 kit pricing. Changed the Expense Coverage section as follows: Changed Smart Parts Plus Coverage statement to say "During or after the above free period, Smart Parts Plus does not pay for the kit". In the Material Information section: Changed the Identification information section as follows: Moved 45-2125 from the 12045-558V3-001 tailcone baggage door assembly effectivity to the 12045-558V2-001 tailcone baggage door assembly effectivity. Filing Instructions: This is a COMPLETE revision. Remove and discard all pages of the prior issue and replace them with pages of Revision 3. THIS PUBLICATION IS AVAILABLE AT: RT 40-25-25 www.cic.bombardier.com Page 1 of 2 Feb 6/12 ### Page 2 (OCR) LEARJET 40 Revision Transmittal Sheet Record of Revisions: ISSUE DISTRIBUTION DATE Basic Never Released Revision 1 Aug 23/10 Revision 2 Feb 21/11 Revision 3 Feb 6/12 THIS PUBLICATION IS AVAILABLE AT: RT 40-25-25 www.cic.bombardier.com Page 2 of 2 Feb 6/12 ### Page 3 (OCR) BOMBARDIER LEARJET 40 SB 40-25-25 Recommended Service Bulletin 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. Contact Information Distribution Date Rev. No. Business Aircraft February 6, 2012 3 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 Logistics or push 4 then push 1 for Technical Publications. EQUIPMENT AND FURNISHINGS - BAGGAGE DOOR FIRE SEAL RELOCATION 1. Planning Information A. Effectivity (1) Learjet 45-2001 thru 45-2114, 45-2116, 45-2118, 45-2120, 45-2122, 45-2124 thru 45-2126. B. Reason (1) To ensure that the door fire seal contacts the entire circumference of the baggage door opening. NOTE: The basic issue of this service bulletin was never released. C. Description (1) This service bulletin gives instructions to install an adjustable clip which provides for proper posi- tioning of the fire seal tape. ith the Export Administration Regulations. Diversion contary t ry to thied stares law is prohibied this publication is performed in compliance with manufacturer's recommendations and/or acceptable industry standard efer to applicable govemment agency regulations and requirements and make sure that the work describ is document is propy means without the phor writen consent of bod bardier the apro is a ratesied in any form or moardier Inc. and/or its affiliat Chalenger, Global Expos, eart: Al traema of Bombardier Inc. Basic Issue: Never Released Revision 3: Feb 6/12 THIS PUBLICATION IS AVAILABLE AT: www.cic.bombardier.com SB 40-25-25 Page 1 of 11 ### Page 4 (OCR) LEARJET 40 Service Bulletin D. Compliance (1) Recommended - Bombardier Learjet Inc. recommends that you complete these instructions in less than 300 flight hours from the initial distribution date of this publication. E. Approval (1) The Federal Aviation Administration (FAA) has approved 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 -801 KIT TASK 0.5 Labor hours to gain access. 10.0 Labor hours to do the aircraft modification. 0.5 Labor hours to do a functional test/operational check. N/A Labor hours to return the aircraft to airworthy status. 11.0 Total Labor Hours NOTE: These labor hours are an estimate and are 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 Logistics for parts availability and shipping times as necessary. (Refer to the title page of this document for contact informa- G. Expense Coverage (1) Labor Coverage (a) Aircraft in the new aircraft 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 distribution date of Revision 2 of this publication. (b) Aircraft out of the new aircraft 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 distribution date of Revision 2 of this publication. Revision 3: Feb 6/12 Basic Issue: Never Released THIS PUBLICATION IS AVAILABLE AT: www.cic.bombardier.com SB 40-25-25 Page 2 of 11 ### Page 5 (OCR) LEARJET 40 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 PART NUMBER QTY NOMENCLATURE PRICING 4525530001-801 1 Service Bulletin Kit $452.60 NOTE: The above price can change. (1) Other materials/parts necessary to complete these instructions. PART NUM- BER NOMENCLATURE QTY SUPPLIER Scotch-Weld Void Filling and Edge 3M Company, EC-3524 B/A Sealing Compound St. Paul, MN Dapco 2100 Dapco 2200 Or Firewall Sealant Required As Products Company, Anaheim, CA Dapco Aircraft NOTE: For ordering and shipping information, please contact Bombardier Aerospace, Learjet Inc., Business Aircraft Customer Service, Parts Logistics. (Refer to the title page of this document for contact information.) 1. Tools and Equipment (1) None. J. Weight and Balance (1) Negligible. K. References (1) Learjet Maintenance Manual, Chapters 20, 25 and 52. L. Other Publications Affected (1) Learjet Illustrated Parts Catalog, Chapter 52. Revision 3: Feb 6/12 Basic Issue: Never Released THIS PUBLICATION IS AVAILABLE AT: www.cic.bombardier.com SB 40-25-25 Page 3 of 11 ### Page 6 (OCR) LEARJET 40 Service Bulletin 2. Material Information A. Parts Required (1) The 4525530001-801 kit contains the parts that follow: PART NUMBER QTY NOMENCLATURE 12945-037-018 1 Fire Barrier Tadpole Tape M4583145-003 1 Clip MS20426AD3-3 4 Rivet MS21075L08N 2 Nutplate MS27039-0807 2 Screw NAS1097AD3-3 2 Rivet NAS1149GN832P 2 Washer NAS1474C3 1 Nutplate 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. Identification Table NUMBER PART NOMENCLA- TURE IDENTIFY TO REPLACEMENT SPARES EFFECTIVITY 12045-557-009 Tailcone Baggage Door Assembly 4525530001-803 (* See Note) 12045-557-009 45-2001 thru 45-2007 12045-557V1-001 Tailcone Baggage Door Assembly 4525530001-804 (* See Note) 12045-557V1-001 45-2008 thru 45-2045 12045-558V2-001 Tailcone Baggage Door Assembly 4525530001-805 (* See Note) 12045-558V2-001 45-2046 thru 45-2114, 45-2118, 45-2125 12045-558V3-001 Tailcone Baggage Door Assembly 4525530001-806 12045-558V3-001 (* See Note) 45-2116, 45-2120, 45-2122, 45-2124, 45-2126 NOTE: * If the tailcone baggage door is replaced with this spares replacement, these instruc- tions must be re-accomplished at the time of installation. 3. Accomplishment Instructions A. Gain Access (1) Gain access to the baggage door and remove the baggage bay door fire barrier from the aircraft. Retain the removed items for installation. (Refer to Chapter 25 of the Maintenance Manual.) Basic Issue: Never Released Revision 3: Feb 6/12 THIS PUBLICATION IS AVAILABLE AT: www.cic.bombardier.com SB 40-25-25 Page 4 of 11 ### Page 7 (OCR) LEARJET 40 Service Bulletin B. Modification of Aircraft NOTE: For dimensions defined without specific tolerance information, refer to Paragraph 3.G. for standard tolerances. (1) Modify the baggage door fire seal as follows: (See Figure 1.) (a) Modify the existing bracket assembly and touch up trimmed edge with epoxy primer. (See Fig- ure 1, Views B-B and C-C.) (Refer to Chapter 20 of the Maintenance Manual.) (b) Install the M4583145-003 clip on the bracket. NOTE: The clip is adjustable and may be adjusted inboard or outboard as needed to make sure there is proper contact with the baggage door opening. (c) Once the clip is in position, install the baggage bay door fire barrier and hold it in place with one aft fastener. (d) Mark the location of the forward fastener position on the clip and match drill 0.25 in [6.35 mm] diameter through the existing hole in the fire barrier and through the clip. (e) Inspect the baggage bay door fire barrier around the hinge arms and door prop rod location and, if necessary, use a non-permanent marker to mark the material to be trimmed as NOTE: Area around the baggage bay door fire barrier hinge arms and door prop rod loca- tion should be trimmed only if it is absolutely necessary. (f) Remove the baggage bay door fire barrier. Retain for installation. (g) Remove the existing fire barrier tadpole tape and discard. Retain all fire barrier retainers, upholstery and connecting hardware for installation. (Refer to Chapter 25 of the Maintenance (h) Install the nutplate for the door closeout hardware on the clip. (i) Use an indelible marker to identify the tailcone baggage door assembly with new part number. (Refer to Identification Table in Section 2.B.) On aircraft that do not require trimming of material from the baggage bay door fire barrier around the hinge arms and/or door prop rod location, proceed to Step 3.B.(1)(m). (K) On aircraft that require trimming of material from the baggage bay door fire barrier around the hinge arms and/or door prop rod location as marked in Step 3.B.(1)(e), do the steps that fol- low: (See Figure 1, Detail E.) 1) Clean saw the openings to the proper dimensions as marked. NOTE: Use a vacuum to remove dust and loose material as the cuts are made. 2) Use a razor knife to cut the core material away from the panel edges to depth of approxi- mately 0.125 in [3.175 mm] around the opening. 3) Remove the loose core material. 4) Use shop air or dry nitrogen and a vacuum to clear out any loose material from the cut- outs. Revision 3: Feb 6/12 Basic Issue: Never Released THIS PUBLICATION IS AVAILABLE AT: www.cic.bombardier.com SB 40-25-25 Page 5 of 11 ### Page 8 (OCR) LEARJET 40 Service Bulletin 5) Use isopropyl alcohol and a clean, dry cotton cloth to thoroughly clean the cut edges of the baggage bay door fire barrier. (Refer to Chapter 20 of the Maintenance Manual.) NOTE: Make sure that any loose material is completely removed and that all surfaces are free of oil, dirt, chips and other contaminants. Iridescent surfaces are evi- dence of improper cleaning and must be cleaned again. (1) Edge fill trimmed areas around the baggage bay door fire barrier hinge arms as follows: CAUTION: MATERIALS USED IN THIS PROCESS MAY BE TOXIC, FLAMMABLE AND/OR IRRITATING TO THE HUMAN BODY. CONSULT WITH THE APPROPRIATE HEALTH AND SAFETY AUTHORITY FOR SPECIFIC AND HANDLING PRECAUTIONS. REQUIREMENTS RELATED TO FACILITIES, EQUIPMENT, VENTILATION DO NOT USE OLD OR CONTAMINATED POTTING MATERIAL. USE BEST SHOP PRACTICES WHEN APPLYING THE EDGE FILL MATERIAL AND MAKE SURE THAT IT CURES PROPERLY. CHECK THE EXPIRATION DATE ON THE CONTAINER BEFORE THE EDGE FILL MATERIAL IS USED AND DO NOT USE OUTDATED MATE- RIAL. MAKE SURE THAT THE TWO PARTS OF THE EDGE FILL MATERIAL ARE PROPORTIONED PROPERLY AND THAT IT HAS THE PROPER CONSISTENCY WHEN IT IS MIXED. 1) Mix the edge fill material as follows: NOTE: The edge fill material has a short pot life. Mix only the amount of material that can be used in 90 minutes and discard mixed material when it starts to solid- ity. a) Add 94 parts by weight of EC-3524 Part A (White) to 100 parts by weight of EC-3524 Part B (Blue). CAUTION: EDGE FILL MATERIAL MUST BE UNIFORM IN TEXTURE AND FREE OF GELLED OR POLYMERIZED PARTICLES. b) Mix thoroughly to be sure of complete blending of the of the fill components. NOTE: Honeycomb edge fill material has a short pot life. Discard mixed material when it starts to solidify. 2) Use a putty knife to fill the cut edges of the baggage bay door fire barrier and compress the fill into the panel, and to remove excess fill material. 3) Allow the fill material to cure for 24 hours at room temperature. Revision 3: Feb 6/12 Basic Issue: Never Released THIS PUBLICATION IS AVAILABLE AT: Www.cic.bombardier.com Page 6 of 11 SB 40-25-25 ### Page 9 (OCR) LEARJET 40 Service Bulletin 4) After the fill material has fully cured, lightly sand the material to assure a smooth, square edge on the cutouts. NOTE: Fill material is properly cured when it is firm to the touch and adhesive does not transfer to the finger. 5) Use isopropyl alcohol and a clean, dry cotton cloth to thoroughly clean the baggage bay door fire barrier. (Refer to Chapter 20 of the Maintenance Manual.) 6) Paint the baggage bay door fire barrier to match. (Refer to Chapter 20 of the Maintenance (m) Install the new fire barrier tadpole tape. (See Figure 1, View D-D.) (Refer to Chapter 25 of the Maintenance Manual.) (n) Install the baggage door fire barrier. (Refer to Chapter 25 of the Maintenance Manual.) (o) Inspect the fire seal as follows: 1) Close the baggage door and inspect the fire seal tape from inside the baggage compart- NOTE: The baggage door must be closed for this inspection to make sure that the fire barrier tadpole tape bulb is contacting the opening and is slightly compressed around the entire circumference of the door. 2) If the fire barrier tadpole tape bulb does not contact the door surround correctly, adjust the door clip and seal retainer as necessary. NOTE: The clip may be adjusted inboard or outboard as required to achieve the desired level of compression of the bulb against the baggage bay door sur- round. Only slight compression of the bulb is required, full compression of the bulb is not necessary. It is acceptable to build up the area under the fire barrier tadpole tape bulb and the baggage bay door fire barrier with fire wall sealant to push the bulb into place and achieve the desired level of compression of the bulb against the baggage bay door surround. (See Figure 1, View D-D.) (p) After the seal installation is complete and adjustments have been made, line the contact area of the entire perimeter of the baggage door opening with 2 in aluminum tape (speed tape). (q) Close and open the baggage door three to five times and completely latch the closed door NOTE: It may be necessary to adjust the door surround closeout panels if the door requires excessive force to close or if the seal does not contact the entire door surround. The distance from the door surround closeout panels to the baggage door fire panel should measure 0.50 to 0.75 in (‡ 0.25 in) [12.70 to 19.05 mm (‡ 6.35 mm)]. (Refer to Chapter 25 of the Maintenance Manual.) (r) Open the door and inspect the aluminum tape all around the perimeter or the door opening for slightly ribbed abrasion marks. NOTE: The marks indicate that the fire seal is contacting the entire perimeter of the door opening properly. Basic Issue: Never Released Revision 3: Feb 6/12 THIS PUBLICATION IS AVAILABLE AT: www.cic.bombardier.com SB 40-25-25 Page 7 of 11 ### Page 10 (OCR) LEARJET 40 Service Bulletin Make any necessary adjustments to the seal to make sure that it makes proper contact with the opening in all areas. C. Functional Test/Operational Check. (1) Open and close the baggage door to make sure the door is not binding. D. Return Aircraft to Airworthy Status (1) Install any additional items removed for access. 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 which 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] MACHINED FORMED 0.00 ‡ 0.03 [0.00 mm ‡ 0.76 mm] 0.000 ‡ 0.010 [0.000 mm + 0.254 mm] ‡ 0°30' ‡2° Revision 3: Feb 6/12 Basic Issue: Never Released THIS PUBLICATION IS AVAILABLE AT: www.cic.bombardier.com SB 40-25-25 Page 8 of 11 ### Page 11 (OCR) LEARJET 40 Service Bulletin B TFWD Detail A MATCH DRILL HOLE 0.25 in [6.35 mm] REMOVED DIAMETER PORTION OF - CLIP THROUGH THE EXISTING M4583145-003 (1 REQUIRED) AND CLIP INNER DOOR PANEL BRACKET ASSEMBLY (REF) C- DRILL HOLE 0.094 in [2.387 mm] DIAMETER TWO PLACES NUTPLATE NAS1474C3 SCREW MS27039-0807 [10.16 mm] 0.40 in [20.32 mm] 0.80 in (1 REQUIRED) WASHER RIVET NAS1149GN832P (2 REQUIRED) NAS1097AD3-3 (1 EACH REQUIRED, 2 PLACES) MODIFIED EXISTING -BAGGAGE BAY BRACKET ASSEMBLY DOOR ASSEMBLY (REF) (REF) View B-B Notes information is found on the last sheet of the figure. K40-402525-001-01 Baggage Door Fire Seal Relocation Figure 1 (Sheet 1 of 3) Revision 3: Feb 6/12 Basic Issue: Never Released THIS PUBLICATION IS AVAILABLE AT: www.cic.bombardier.com Page 9 of 11 SB 40-25-25 ### Page 12 (OCR) LEARJET 40 Service Bulletin 0.19 in [4.826 mm] DIAMETER DRILL HOLE [10.66 mm] 0.42 in _ _0.75 in [19.05 mm] (REF) CLIP MODIFIED THROUGH THE EXISTING CLIP AND BRACKET BRACKET ASSEMBLY ASSEMBLY (2 PLACES) (REF) DRILL HOLE 0.094 in [2.387 mm] BAGGAGE BAY DIAMETER DOOR ASSEMBLY TWO PLACES (REF) NUTPLATE MS21075L08N FIRE BARRIER (CLIP INSTALLATION) View C-C MS20426AD3-3 (2 REQUIRED) RIVET RETAINER (4 REQUIRED) (REF) BAGGAGE BAY DOOR FIRE BARRIER FIRE BARRIER (REF) TADPOLE TAPE 12945-037-018 (1 REQUIRED) FIRE TADPOLE SEALANT TAPE BULB (REF) (REF) FIRE BARRIER TADPOLE TAPE BULB CONTACT AREA (TYPICAL FOR ALL DOOR SURROUND) (REF) FAY SEAL THE TAIL OF THE FIRE FIRE FIRE BARRIER TADPOLE TAPE SEALANT TO THE INBOARD SURFACE (REF) OF THE BAGGAGE BAY DOOR BAGGAGE BAY WITH FIRE SEALANT. PANEL ASSEMBLY (REFER TO CHAPTER 20 OF THE (REF) MAINTENANCE MANUAL.) (FIRE BARRIER TADPOLE TAPE INSTALLATION, NOTE SHOWN WITH BAGGAGE BAY DOOR CLOSED) Notes information is found on View D-D the last sheet of the figure. K40-402525-001-02 Baggage Door Fire Seal Relocation Figure 1 (Sheet 2 of 3) Basic Issue: Never Released Revision 3: Feb 6/12 THIS PUBLICATION IS AVAILABLE AT: www.cic.bombardier.com Page 10 of 11 SB 40-25-25 ### Page 13 (OCR) LEARJET 40 Service Bulletin 5 >4 > 0.20 in [5.08 mm] (MINIMUM) (FIRE BARRIER LOWER HINGE LOCATION, UPPER HINGE LOCATION TYPICAL AND HINGE REMOVED FOR CLARITY Detail E NOTES Trim existing bracket assembly to 0.80 in [20.32 mm] dimension as shown. Touch up trimmed edge of bracket assembly with epoxy primer. (Refer to Chapter 20 of the Maintenance Manual.) The clip may be adjusted inboard or outboard as required to achieve the desired level of compression of the bulb against the baggage bay door surround. Only slight compression of the bulb is required, full compression of the bulb is not necessary. It is permissible to trim the baggage door prop rod location. Do not exceed minimum thickness of 0.20 in [5.08 mm] measured from inboard surface. It is permissible to trim the baggage door fire barrier outboard portion of inboard hinge cutout. Do not exceed minimum thickness of 0.20 in [5.08 mm] measured from inboard surface. Edge fill trimmed area of baggage door fire barrier. K40-402525-001-03 Baggage Door Fire Seal Relocation Figure 1 (Sheet 3 of 3) Revision 3: Feb 6/12 Basic Issue: Never Released THIS PUBLICATION IS AVAILABLE AT: www.cic.bombardier.com Page 11 of 11 SB 40-25-25 --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain, except the copies of manufacturers’ service documents, which belong to their rights holders.