# 100-25-21 Page 1 of 1 

# SERVICE BULLETIN REVISION TRANSMITTAL SHEET

MODEL BD-100-1A10 (CL-300)

Discard Revision 01 of this Service Bulletin dated May 02/2013 and replace in its entirety with this Revision 02.

Service Bulletin No. 100-25-21

Date of Basic Issue Jun 30 / 2008

Revision No. 01 Dated Ma y 02 / 2013

Revision No. 02 Dated Jul 25 / 2013

For action applicable to aircraft on which the Basic Issue of this Service Bulletin was done, refer to the retroactive action box on Page 1 of this Service Bulletin.

This revision is issued to:
1. Add, in the Summary Sheet, a Note in reference to Airworthiness Directive, TCCA AD # CF-2010-06. 2. Add, in Paragraph 1.K., a refer ence to Airworthiness Directive, TCCA AD # CF-2010-06. 3. Add, in Paragraph 1.K., a refer ence to Advisory Wire AW300-21-0083. 4. Change, in Paragraph 3.C., the supplier information for Code B. 5. Make miscellaneous minor changes, as necessary, with no change of context.Basic Issue: Jun 30/2008 

# 100-25-21 Revision 02: Jul 25/2013 Page 1 of 1 

# SERVICE BULLETIN SUMMARY

This Service Bulletin is available at: www.cic.bombardier.com 

### BD-100-1A10 (CL-300)

ATA 25-80

EQUIPMENT / FURNISHINGS

SPECIAL CHECK/REWORK – INSULATION – REMOVAL OF POSSIBLE FOREIGN MATERIAL IN THE AREA OF THE SAFETY VALVES
The information below is provided for your reference. For full details, please see corresponding paragraph contained within this bulletin. 

# RECOMMENDED

SPECIFIED TIME COMPLIANCE 

## COMPLIANCE TIME At the next maintenance opportunity, but no later than July 2014

EFFECTIVITY: A/C Serial No. 20003 to 20123, 20126, 20127, 20129 to 20133, 20135 to 20138, 20140 to 20142, 20144, 20145 and 20147

MANPOWER: See Paragraph 1.F.
CONTINUED AIRWORTHINESS (CAW) FLEET CAMPAIGN YES NO

KITS and/or PARTS YES NO

TOOLING/GSE YES NO

PLANNING INFORMATION: See important information at the start of Paragraph 1. YES NO

DEDICATED SCHEDULE YES NO

PREREQUISITE SERVICE BULLETINS: N/A

NOTE: This Service Bulletin has an Airworthiness Directive, TCCA AD # CF-2010-06, which requires a revised maintenance schedule, cleaning of the safety valves and surrounding area and modification of the safety valves.
To place an order for parts or kits, please call Bombardier Aerospace Parts Services at:
514-855-2999 or 1-866-538-1247Refer to applicable governmental agency regulations and requirements and make sure that the work described in this Service Bulletin is performed in compliance with manufacturer’s recommendations and/or acceptable industry standards. This document is proprietary to Bombardi er 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. © 2008 - 2013 Bombardier Inc. All rights reserved Learjet, Challenger, Global, are registered trademarks of Bombardier Inc. or its subsidiaries.

Basic Issue: Jun 30/2008 

# 100-25-21 Revision 02: Jul 25/2013 Page 1 of 14 

# SERVICE BULLETIN

This Service Bulletin is available at: www.cic.bombardier.com 

### BD-100-1A10 (CL-300)

ATA 25-80

EQUIPMENT / FURNISHINGS

SPECIAL CHECK/REWORK – INSULATION – REMOVAL OF POSSIBLE FOREIGN MATERIAL IN THE AREA OF THE SAFETY VALVES

RETROACTIVE ACTION

THE ACTION THAT FOLLOWS IS RECOMMENDED FOR AIRCRAFT ON WHICH THE BASIC ISSUE OF THIS SERVICE BULLETIN WAS DONE:
Do the Special Check/Rework as given in Paragraph 2.B., within the Compliance Time given in Paragraph 1.D.



### 1. PLANNING INFORMATION
A. Effectivity BD-100-1A10 aircraft, Serial No. 20003 to 20123
, 20126
, 20127
, 20129 to 20133
, 20135 to 20138
, 20140 to 20142
, 20144
, 20145 and 20147

. NOTES: 1. Refer to Service Bulletin 100-25-14 for BD-100-1A10 aircraft, Serial No. 20124, 20125, 20128, 20134, 20139, 20143, 20146, 20148 to 20173, 20176 and 20177. 2. The instructions given in this Service Bulletin are only applicable to the systems and parts installed at the time of delivery of the aircraft or as changed by Bombardier Aerospace Service Bulletin(s). Before you do this bulletin, examine all STC, STA or equivalent action changes to make sure that this bulletin can be completed.MODEL BD-100-1A10 (CL-300)

Basic Issue: Jun 30/2008 

# 100-25-21 Revision 02: Jul 25/2013 Page 2 of 14 B. Reason This Service Bulletin provides instructions to inspect for presence of foreign material in the area of the safety valv es and contamination on the safety valves. Some events of cabin depressurizati on were reported and investigation demonstrated presence of black foam and in correct installation of the insulation blankets in the area of the safety valves. Any loose debris in this area could possibly block the safety valves and lead to cabin depressurization. Further events of cabin depressurization we re reported following incorporation of the Basic Issue of this Service Bulletin, thus, this revision gives improved instructions to clean the area in front of the safety valves. C. Description This Service Bulletin gives instructions to:

–Get access to the safety valves,

–Inspect for presence of foreign material in the area surrounding the safety valves,

–Remove foreign material, as required,

–Inspect safety valves for presence of contamination.

–Inspect for correct installation of the insulation blankets in safety valve area.

–Clean or replace safety valve(s), as necessary, and

–Do the necessary tests to make sure the replaced safety valve(s) operate(s) correctly, as necessary. D. Compliance Revision 01 or subsequent, of this Service Bulletin is recommended at the next maintenance opportunity, but no later than July 2014. NOTE: This Service Bulletin is in reference to Advisory Wire AW300-21-0083.MODEL BD-100-1A10 (CL-300)

Basic Issue: Jun 30/2008 

# 100-25-21 Revision 02: Jul 25/2013 Page 3 of 14 E. Approval The technical content of this Service Bulletin has been approved under the authority of Transport Canada Civil Aviation (TCCA) Design Approval Organization (DAO) No. DAO #93-Q-02.
NOTES: 1. The technical content of this Service Bulletin is accepted by the FAA under the Canada/USA bilateral Aviation Safety Agreement. 2. The technical content of this Service Bulletin is accepted by the JAA and by EASA in accordance with established procedures. F. Manpower NOTES: 1. The man-hours given are es timates to help you schedule the tasks given in this bulletin. The estimate s are for direct labor performed by an experienced crew and do not include the time for familiarization, planning, aircraft preparation in hangar such as towing and positioning of scaffolds, removal of interior furnishings, repainting, supervision and inspection.
For more information related to t he manpower estimates, refer to SB 100-00-02. 2. This Service Bulletin may require consumable materials that have specific curing times (refer to Paragraph 3.). The accumulated curing time is not included in the labor estimates and should be considered for planning purposes before you schedule this Service Bulletin. 2 man-hours are necessary to do this special check/rework. 2 additional man-hours are necessary to replace each safety valve, as required. Bombardier Aerospace pays for the labor to do this special check/modification until July 2014.MODEL BD-100-1A10 (CL-300)

Basic Issue: Jun 30/2008 

# 100-25-21 Revision 02: Jul 25/2013 Page 4 of 14 G. Material – Cost and Availability If contamination that cannot be cleaned off is found per Paragraph 2.B.(4)(e), up to two safety valves, Part No. 81141A010303, may be necessary to do this Service Bulletin. The valves are ava ilable at no cost if a no-charge purchase order is sent to Bombardier Aerospace Parts Services before July 2014. For material data, refer to Paragraph 3. Send the removed safety valve(s), Part No. 81141A010303, to one of the two addresses given below in exchange for replacement unit(s): Learjet – Core Returns 8219 West Irving, Bldg 9, Dock 9, Wichita, KS 67209 USA
or Distribution Centre Frankfurt – Core Returns Bombardier Aerospace Germany GmbH Hans-Boeckler-Strasse 9 GROSS-GERAU Hesse 64521 Germany Refer to your Material Return Author ization (MRA) form to find the applicable return address. NOTES: 1. Bombardier Aerospace is ma intaining a rotable pool of replacement safety valves, to be supplied to the operators under the terms and conditions given below:

–The removed safety valves(s), Part No. 81141A010303, must be returned to one of the addresses given above in less than 10 days of receipt of replacement unit( s) with documentation showing the serial number of the aircraft.

–If the removed safety valves(s), Part No. 81141A010303, are not returned in less than 10 days, t he operator will be charged for the replacement unit(s). 2. On the no-charge purchase order, write “For incorporation of SB 100-25-21. During or after the above free period, Smart Parts Plus does not pay for the parts.MODEL BD-100-1A10 (CL-300)

Basic Issue: Jun 30/2008 

# 100-25-21 Revision 02: Jul 25/2013 Page 5 of 14 H. Tooling The equipment and tools listed below may be necessary to do this special check/rework:

GSE REFERENCE NO. PART NO. DESCRIPTION 20X-00-04 M1-G-KIT Portable Bonding Tester, or equivalent
21C-31-04 SBE2221 Cabin Pressurization Safety Valve – Test Kit
21C-31-05 MIL-H-5593-4-156-1OE Adapter Hose Cabin Pressurization Safety Valve – Test Kit
34C-10-04 ADTS-405F Air Data Test Set - Commercially Available Stopwatch - Commercially Available Wrench, Torque

NOTES: 1. Refer to the BD-100 Illustra ted Tool and Equipment Manual (ITEM) to make sure that you use the co rrect equipment configuration. 2. Refer to the Liability Statement in the ITEM for acceptable GSE equivalents. 3. This list is provided for quick reference. In case of discrepancy between this list and the tools call ed in the SPM, WM, Chapter 20, then the tools called in the SPM, WM prevail. Other approved alternative tools are acceptable and can also be used.
I. Weight and Balance No change.
J. Electrical Load Data No change.MODEL BD-100-1A10 (CL-300)

Basic Issue: Jun 30/2008 

# 100-25-21 Revision 02: Jul 25/2013 Page 6 of 14 K. References

–TCCA Airworthiness Directive, CF-2010-06.

–Advisory Wire AW300-21-0083.

–Bombardier Aerospace, Restriction and/or Special Instruction (RSI), C-100-000-21-0084, Rev. C.

–BD-100 Aircraft Maintenance Manual (AMM), Chapters 6, 21, 25 and 51.

–BD-100 Supplemental Maintenanc e Manual (SMM), Chapter 25.

–BD-100 Aircraft Illustrated Part s Catalog (AIPC), Chapter 21.

–Liebherr Aerospace Component Maintenance Manual (CMM), 21-31-40.

–Service Not Incorporated Engi neering Order (SNIEO), 1005351038 S1.

–Bombardier Aerospace, Installation Drawing M2013282.

–Bombardier Aerospace, SB 100- 00-02, “Description and Policy”.

L. Other Publications Affected
None. M. Equivalent Service Bulletin
None.


### 2. ACCOMPLISHMENT INSTRUCTIONS NOTES: 1. All TASKs given in the proc edures that follow are from the BD-100, Aircraft Maintenance Manual unless otherwise specified. 2. All references made to zones, access panels and/or doors, are from the BD-100 Aircraft Maintenance Manual, Chapter 6. A. Aircraft Setup Remove the baggage compartment headliner to get access to the safety valve area and the insulation blankets between the pressure bulkhead (FS 669.76) and the lavatory bulkhead (FS 629.25). Refer to SMM Chapter 25-53-03.MODEL BD-100-1A10 (CL-300)

Basic Issue: Jun 30/2008 

# 100-25-21 Revision 02: Jul 25/2013 Page 7 of 14 B. Special Check/Rework (1) Visually inspect for presence of:

–Foreign material in the area surrounding the safety valves.

–RTV silicone on all visible surfaces of the safety valves. Refer to Figure 1.

–Contamination (e.g. RTV, dust, lint) on the pressure sensing port. Refer to Figure 1.

–RTV or foam on the bulkhead stru cture. Refer to Figure 1.

–Tape or insulation within approximatel y 0.5 in (12.7 mm) minimum from the safety valves opening. Refer to Figure 1.

–Loose material, loose insulation, foam or any other foreign material in any part of the safety valve compartm ent and in the channel between the lavatory grill and the safety valv e (above the baggage compartment ceiling). (2) Remove any foreign material, loose ma terial, loose insulation and foam in the area surrounding the safety valves, in the safety valve compartment and in the channel between the lavatory grill and the safety valve (above the baggage compartment ceiling). Ther e must be a clear path between the lavatory grill and the safety valves. (3) If RTV is found on the visible surfaces of the safety valves or on the Aft Pressure Bulkhead near the safety valves, do as follows: (a) Remove the RTV using a non-metallic scraper. (b) Clean the surfaces. Refer to TASK 51-25-00-110-801. (c) If the RTV cannot be removed from the visible surfaces of the safety valves, do as follows: (i) Remove the safety valve, Part No. 81141A010303. Refer to TASK 21-31-09-000-801. (ii) Send the safety valve, to the address shown in Paragraph 1.G. (iii) Install a new safety valve, Part No. 81141A010303. Refer to TASK 21-31-09-400-801. (iv) Do the electrical bonding test of the safety valve. Refer to SPM TASK 51-80-00-760-801.
NOTE: Make sure that the resistance value is not more than 0.5 ohm measured between the safety valve and the aircraft primary structure. (4) To check if there is any contaminati on (e.g. RTV, dust or lint) on the safety valve pressure sensing ports, do as follows: (a) Gently press the safety valve plunger to its fully open position to expose the outside diameter of the pressure sensing port conduit. Refer to Figure 1.MODEL BD-100-1A10 (CL-300)

Basic Issue: Jun 30/2008 

# 100-25-21 Revision 02: Jul 25/2013 Page 8 of 14 (b) Visually inspect the outside diameterof the pressure sensing port conduit for the presence of contamination and release the safety valve plunger. (c) Visually inspect the inside diameter of the pressure sensing port conduit for presence of contamination. (d) For safety valves with no presence of contamination on the inside or outside diameter of the pressure sensing port conduit, go to Paragraph 2.B.(5). (e) For safety valves with the presence of RTV or the presence of dust or lint contamination on the inside or outside diameter of the pressure sensing port conduit, do as follows: (i) Remove the safety valve, Part No. 81141A010303. Refer to TASK 21-31-09-000-801. (ii) Send the safety valve, to the address shown in Paragraph 1.G. (iii) Install a new safety valve, Part No. 81141A010303. Refer to TASK 21-31-09-400-801. (iv) Do the electrical bonding test of the safety valve. Refer to SPM TASK 51-80-00-760-801.
NOTE: Make sure that the resistance value is not more than 0.5 ohm measured between the safety valve and the aircraft primary structure. (5) Remove any loose tape, loose insulation and frayed insulation found within approximately 0.5 in (12.7 mm) from the safety valve openings. (6) If the minimum area of 0.5 in (12.7 mm) surrounding the safety valves cannot be cleared, trim the insulation as far as possible from the opening of the safety valve and secure with PSA tape, Part No. 70-1C-2. Refer to SPM TASK 51-28-01-390-803:MODEL BD-100-1A10 (CL-300)

Basic Issue: Jun 30/2008 

# 100-25-21 Revision 02: Jul 25/2013 Page 9 of 14 View of Inspection Area around Safety Valves Figure 1MODEL BD-100-1A10 (CL-300)

Basic Issue: Jun 30/2008 

# 100-25-21 Revision 02: Jul 25/2013 Page 10 of 14 (7) Make sure that the insulati on blankets above the baggage compartment headliner are installed correctly. (a) Make sure that the insulation blankets do not hang down in the air channel between the lavatory grill and the safety valves. Refer to Figures 2 and 3. (b) Make sure that the adhesive tape is bonded correctly. C. Testing If one or both safety valves were replaced, do the functional test of the positive and negative pressure relief. Refer to TASK 21-31-09-720-801.
D. Close-out (1) Remove all tools, equipment and unwanted materials from the aircraft. (2) Close the safety valve access panel. E. Recording When this Service Bulletin is completed, make an entry in the aircraft log and send the attached Incorporation Notice to Bombardier Business Aircraft Customer Services (BBACS). In an effort to improve the quality of our technical communications, we are requesting your feedback. Please take a moment to fill out our easy on-line Service Bulletin survey: http://csefeedback.aero.bombardier.comMODEL BD-100-1A10 (CL-300)

Basic Issue: Jun 30/2008 

# 100-25-21 Revision 02: Jul 25/2013 Page 11 of 14 

### 3. MATERIAL INFORMATION

A. Kit No kit is necessary to do this Service Bulletin.
B. Parts The part that follows may be necessary to do this Service Bulletin and is available from Bombardier Aerospace Parts Services, Montreal:

NEW PART NO. QTY ITEM USED PART NO. INSTRUCTIONS - DISPOSITION 81141A010303 Up to 2 Safety Valve 81141A010303 Refer to Paragraph 1.G. NOTE: The part number for the item lis ted above is subject to change without revision to this Service Bulletin. In case of discrepancy between this list and any other list, the Illustrated Parts Catalog prevails and shall be used to determine the latest part number. C. Material The consumable materials that follow, or equivalent, may be necessary to do this Service Bulletin. These can be purchased from a local supplier. Bombardier Aerospace does not pay for these consumables.

DESCRIPTION PART No./NAME SPECIFICATION QUANTITY SUPPLIER (See Note) Acrylic Conformal

Coating CT: 24 hours Humiseal Type 1B15 As Necessary Code: A

Tape, Pressure Sensitive 70-1C-2” - As Necessary Code: B

Solvent HFE71DA - As Necessary Code: C

Brush, Paint,

Natural or Synthetic

Bristle - - As Necessary Code: D

Lockwire - Monel, 0.032 in (0.81 mm) As Necessary Code: D

Scraper, Non-metallic - - As Necessary Code: D

Solvent - TT-1-735 Grade A or B As Necessary Code: DMODEL BD-100-1A10 (CL-300)

Basic Issue: Jun 30/2008 

# 100-25-21 Revision 02: Jul 25/2013 Page 12 of 14 NOTES: 1. Refer to the table that follo ws for each supplier’s address listed by codes. 2. The Curing Time (CT), if applicable, for each consumable material is indicated with the description of each product. 3. At time of release of this Service Bulletin, the information on the supplier was valid and accurate. In the event that this information has changed, the operator is encouraged to use the World Wide Web to find a local supplier.

SUPPLIERS ADDRESSES BY CODES

Code: A Humiseal Division of Chase Corp. 128 First Street Pittsburgh, PA 15238 U.S.A. Tel.: (8660) 932-0800 Web Site: www.humiseal.com Code: B E&H Laminating & Slitting Co. 138 Grand Street Paterson, N.J. 07501 U.S.A. Tel.: (973) 345-1725 Fax: (973) 345-3224 Web Site: www.ehlam.com

Code: C 3M Center 2501 Hudson Road Maplewood, Minnesota 55144-1000 U.S.A. Tel.: (888) 364-3577
Web Site: www.3m.com Code: D
Commercially Available

D. Publications No publications required.Baggage Compartment Air ChannelFigure 2Basic Issue: Jun 30/2008Revision 02: Jul 25/2013100-25-21Page 13 of 14 SB100-25-050-13282-C-S1AAA-ABLANKET(FOAM)(REF)FIRST LAYER OF INSULATION (REF)SECOND LAYER OF INSULATION (REF)(AIR CHANNEL)BAGGAGE HEADLINER ASSYSAFETY VALVE(OVERHEAD PANEL LIGHT AND SMOKE DETECTOR REMOVED FOR CLARITY)MESHBLANKET(FOAM)(REF)PSA TAPE(BOTH SIDES)SAFETY VALVECross Section through Air ChannelFigure 3Basic Issue: Jun 30/2008Revision 02: Jul 25/2013100-25-21Page 14 of 14

### SERVICE BULLETIN EVALUATION FORM (Your ideas will help us provide better bulletins)

SERVICE BULLETIN: 100-25-21 ISSUE: Rev. 02 DATED: Jul 25/2013

TITLE: Special Check/Rework – Insulation – Removal of Possible Foreign Material in the Area of the Safety Valves

In an effort to improve the quality of our technical communications, we are replacing the standard Service Bulletin Evaluation Form with an on-line Service Bulletin Survey and we are requesting your feedback. Pl ease take a moment to fill out our easy on-line Service Bulletin survey:



### http://csefeedback.aero.bombardier.com

## SERVICE BULLETIN INCORPORATION SHEET – “100-25-21”BOMBARDIERSUBMISSION Upon completion of the Service Bulletin, please fill-in, fax to (514) 855-8798 or e-mail to Fracas at fracas.montreal@aero.bombardier.com
If your aircraft is registered on CAMP and you are reporting to them, please do not send the incorporation sheet to Bombardier. If your aircraft is on another tracking system, please contact Bombardier to make arrangements for automated data submission.

COMPLIED WITH Service Bulletin Number Rev. * Parts Completed YES NO N/A Remarks/Reason

100-25-21 02 -

- - -

- - -

Actual hours to accomplish Service Bulletin:

* NOTES: 1. Where the Service Bulletin is divided into a number of parts (e.g., PARTS A, B, C, D, etc.) which can be carried out separately, indicate only those parts completed at this time.
2. For repetitive checks (usually PART A) only the initial check should be reported unless otherwise stated in the Service Bulletin.
3. When more than one part is carried out at the same time, each part should be reported.

Aircraft Serial No. Aircraft Reg. No. Airframe Hours: Airframe Landings S.B. Incorporation date Service Order No. ( dd/mm/ yy) Facilit y Incor p oratin g S.B.
Name Signature Date (dd/mm/yy) Signature not required if sent by E-Mail-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --



### Bombardier Business Aircraft Customer Services (BBACS) P.O. Box 6087, Station Centre-ville Montréal, Québec, Canada H3C 3G9
Attention: Customer Support Department, Maintenance Engineering

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