SB 670BA ---35---012 Page 1 of 1 May 06/2013 

## SERVICE BULLETIN REVISION TRANSMITTAL SHEET
SERVICE BULLETIN 670BA ---35 ---012
SUBJECT: Oxygen --- Crew Oxygen System --- In-Service Crew ---Oxygen ---System Cleaning These pages transmit: Revision B of Service Bulletin 670BA --- 35 --- 012, dated May 06/2013 The changes in this revision have no effect on aircraft that have had this service bulletin incorporated.
Reason: Revised Accomplishment Instructions: Change some steps in the Close-Out section of this service bulletin. Revised Material Information, paragraph 3., to: Change some part numbers in kit 670BA35012K90A. Add Kit 670BA35012K91 Revised Appendix A to: Change some steps in the Procedure. Change some items numbers in the illustration. This revision also includes small editorial changes that do not have an effect on the technical content.
Instructions: Discard the copy of Service Bulletin 670BA --- 35 --- 012, Revision A, dated Nov 26/2012. Replace with the copy attached. Service Bulletin History: Initial issue, dated June 23/2012. Revision A, dated Nov 26/2012. 1SB 670BA−35−012 Page 1 of 42 June 23/2012 Revision B, May 06/2013 

# SERVICE BULLETIN

Technical Publications

THIS SERVICE BULLETIN IS SENT TO EACH OPERATOR. IF THE OPERATOR HAS LEASED AIRCRAFT, TRANSFERRED SPARES IN THE LAST SIX MONTHS, SEND THIS SERVICE BULLETIN TO THE NEW OWNER, UNLESS CONFIRMATION WAS RECEIVED THAT BOMBARDIER COMMERCIAL AIRCRAFT HAS INCLUDED THE NEW OPERATOR ON THE DISTRIBUTION LIST. SEND THIS SERVICE BULLETIN TO THE LESSEE. IF THE OPERATOR HAS SOLD AIRCRAFT OR

ATA SYSTEM: 35−10 NUMBER: 670BA−35−012 SUBJECT: Oxygen − Crew Oxygen System − In-Service Crew−Oxygen−System Cleaning

1. PLANNING INFORMATION A. Effectivity (1) Aircraft Affected: Aircraft Model Service Aircraft Serial Numbers CL−600−2C10 10002 thru 10265 CL−600−2D15 and CL−600−2D24 15001 thru 15153, 15156 and 15157 NOTE: The instructions 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 service bulletins. Before you do this service bulletin, examine all Supplemental Type Certificates (STCs) and Supplemental Type Approvals (STAs) or equivalent action changes to make sure you can complete this service bulletin. NOTE: The procedure in this service bulletin was validated on aircraft serial number 15001.

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 2 of 42 June 23/2012 Revision B, May 06/2013 B. Reason (1) Condition It is possible for the oxygen tubes of the crew oxygen system to have traces of oil because of the procedure used for pressure testing and tube cleaning. This can cause a fire hazard. (2) Evidence Field sampling of a line within the crew oxygen system on nine aircraft showed traces of oil. (3) Objective/Benefit This service bulletin gives the procedure to clean the crew oxygen system. C. Description The passenger door is opened. The crew oxygen system is depressurized. The circuit breakers are opened. The electrical power is removed from the aircraft. The main avionics-compartment door is opened. The copilot and the pilot side consoles are removed. The entrance storage compartment is removed. Galley 1 is removed. The compartment and Galley 1 floor panels are removed. The end-fittings and the unions are cleaned manually. The inner wall of the tubes are cleaned with solvent and flushed with nitrogen. A leak test and a functional test of the crew oxygen-system are done. The crew oxygen system is pressurized.The circuit breakers are closed. The compartment and Galley 1 floor panels are installed. Galley 1 is installed. The entrance storage compartment is installed. The copilot and the pilot side consoles are installed. The main avionics-compartment door is closed. The electrical power is connected to the aircraft. D. Compliance
Recommended Service Bulletin. Bombardier recommends that this service bulletin be done at no more than 6600 flight hours from the release date of revision A of this service bulletin, unless otherwise directed by the airworthiness authority of the operator. This service bulletin does not affect Airworthiness Limitations (AWLs) or Damage Tolerance Inspections (DTIs).

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 3 of 42 June 23/2012 Revision B, May 06/2013 E. Approval The technical content of this service bulletin has been approved under the authority of the TCCA Design Approval Organization No: DAO #93−Q−02. F. Manpower The man-hours given below are estimates for direct labor done by an experienced crew on an aircraft prepared for maintenance. These estimates do not include the time necessary for: −Administrative functions such as planning, liaising, familiarization, and report writing. −Non-productive elapsed time such as rest time, having meals, and crew shift changes. −Elapsed time such as for paint to dry, sealant to cure, and fuel tank venting. −Preparation for modification (unless specified in the Accomplishment Instructions) such as cleaning and getting parts, tools, consumables, and ground equipment. −Quality assurance inspections, troubleshooting and/or correction of discrepancies found when a task is done. −All other activities that are not considered by Bombardier as directly related to the accomplishment of this procedure. NOTE: For on-site labor assistance, please speak with a Fleet Services representative for a quote. Contact the Fleet Services Team through the CRC at 514-855-8500 or email at thd.crj@aero.bombardier.com. It will take an estimated 51 man-hours to complete this service bulletin. The man-hours are divided in the table that follows: TASK MAN-HOURS (1) Job Set-Up 14 (2) Procedure 20 (3) Test 5 (4) Job Close-Out 12

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 4 of 42 June 23/2012 Revision B, May 06/2013 G. Material − Price and Availability (1) The kits in the tables that follow are available from Bombardier Commercial Aircraft. NOTE: For a list of kit contents, refer to paragraph 3.A.

KIT NUMBER NAME 670BA35012K1 Crew−Oxygen Low Pressure Parts (2) Please send a purchase order to the address below to schedule kit delivery: Bombardier Service Bulletin Kit Support Team 123 Garratt Blvd, N42−24 Toronto, Ontario Canada M3K 1Y5 Fax: 416-375-3060 Phone: 416-375-3920 Email: sbkits@aero.bombardier.com Please contact the Service Bulletin Kit Support Team at the address above for terms and conditions. (3) Refer to paragraph 3.B. for a list of consumables for this service bulletin. H. Tooling − Price and Availability (1) The tool kits in the tables that follow are available from Bombardier. NOTE: For a list of the kit contents, refer to paragraph 3.A.

KIT NUMBER NAME 670BA35012K90A Crew−Oxygen Low Pressure Flushing Kit For aircraft that have not had revision A or a previous revision of this service bulletin incorporated but that have ordered Kit 670BA35012K90

KIT NUMBER NAME 670BA35012K91 Hose Replacement Kit

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 5 of 42 June 23/2012 Revision B, May 06/2013 (2) Please send a purchase order to the address below to schedule kit delivery: Bombardier Service Bulletin Kit Support Team 123 Garratt Blvd, N42-24 Toronto, Ontario Canada M3K 1Y5 Fax: 416-375-3060 Phone: 416-375-3920 Email: sbkits@aero.bombardier.com Please contact the Service Bulletin Kit Support Team at the address above for terms and conditions. Refer to paragraph 3.C. for a list of special tools and equipment for this service bulletin. Refer to the paragraphs below for terms and conditions. I. Weight and Balance Not changed. J. Electrical Load Data Not changed. K. References Restriction and/or Special Instruction (RSI) C−35−1068−00, revision D. Aircraft Maintenance Manual (AMM). For Bombardier reference only: PCA 74895. Refer to the SB Introduction document for definition or explanation of service bulletin content. L. Other Publications Affected None M. Relationship Chart Not applicable.

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 6 of 42 June 23/2012 Revision B, May 06/2013 2. ACCOMPLISHMENT INSTRUCTIONS A. Job Set-Up Reference Information
REFERENCE DESIGNATION AMM 12−00−00−867−801 Standard Aircraft Configuration for Maintenance AMM 12−16−35−614−801 Servicing of the Crew Oxygen System AMM 12−18−38−613−801 Servicing of the Forward Water System AMM 20−21−00−910−801 Torquing of Threaded Fasteners AMM 20−22−00−910−802 Torquing of Plumbing Line Fittings in the Oxygen System AMM 20−51−00−000−802 Removal of Lockwire AMM 20−51−00−400−802 Installation of Lockwire AMM 23−31−10−710−801 Operational Test of the Attendant Handset/ Cradle AMM 24−00−00−861−802 Remove Electrical Power from the Aircraft AMM 24−00−00−910−801 Electrical/Electronic Safety Precautions AMM 25−15−07−000−801 Removal of the Pilot/Copilot Side−Console Panel AMM 25−15−07−400−801 Installation of the Pilot/Copilot Side Console Panel AMM 25−15−10−000−801 Removal of the Control Column Panels AMM 25−15−10−400−801 Installation of the Control Column Panels AMM 25−17−01−000−801 Removal of the Flight Compartment Door (PRE STC CR25−17−202) AMM 25−17−01−400−801 Installation of the Flight Compartment Door (PRE STC CR25−17−202) AMM 25−24−13−000−801 Removal of the Entrance Storage Compartment AMM 25−24−13−000−801 Installation of the Entrance Storage Compartment

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 7 of 42 June 23/2012 Revision B, May 06/2013 REFERENCE DESIGNATION AMM 25−26−05−000−803 Removal of the Passenger−Entry Compartment Ceiling Panels AMM 25−26−05−400−803 Installation of the Passenger−Entry Compartment Ceiling Panels AMM 25−31−01−000−802 Removal of the Galley 1 AMM 25−31−01−400−802 Installation of the Galley 1 AMM 25−32−01−710−801 Operational Test of the Oven AMM 25−32−06−710−801 Operational Test of the Beverage Maker AMM 33−26−00−710−801 Operational Test of the Galley Lights AMM 35−00−00−910−801 Oxygen Safety Precautions AMM 35−00−00−910−802 Oxygen Servicing Safety Precautions AMM 35−10−00−790−801 Leakage Test of the Crew Oxygen System AMM 35−10−00−862−801 Depressurize the Crew Oxygen System AMM 35−10−00−862−802 Pressurize the Crew Oxygen System AMM 35−11−03−000−801 Removal of the Oxygen Cylinder AMM 35−11−03−400−801 Installation of the Oxygen Cylinder AMM 35−11−09−000−801 Removal of the Oxygen Pressure Switch AMM 35−11−09−400−801 Installation of the Oxygen Pressure Switch AMM 35−11−15−000−801 Removal of the Mask Stowage Box AMM 35−11−15−400−801 Installation of the Mask Stowage Box AMM 52−22−00−000−801 Removal of the Crew Escape Hatch AMM 52−22−00−400−801 Installation of the Crew Escape Hatch AMM 51−23−00−390−825 Humiseal Corrosion − Protective Coating AMM 51−80−00−760−801 Electrical Bonding Test AMM 53−00−47−000−802 Removal of the Passenger Compartment Floor Panels

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 8 of 42 June 23/2012 Revision B, May 06/2013 REFERENCE DESIGNATION AMM 53−00−47−400−802 Installation of the Passenger Compartment Floor Panels AMM 53−12−32−000−801 Removal of the Flight Controls Access Panel (131AL/132AR) AMM 53−12−32−400−801 Installation of the Flight Controls Access Panel (131AL/132AR) SRM 51−26−00−001−001 Cleaning (1) Make sure that the aircraft is in standard configuration for maintenance (Refer to AMM 12−00−00−867−801). WARNING: OBEY ALL THE SAFETY PRECAUTIONS WHEN YOU DO MAINTENANCE ON OR NEAR ELECTRICAL/ELECTRONIC EQUIPMENT. IF YOU DO NOT OBEY THE SAFETY PRECAUTIONS, INJURIES TO PERSONS AND/OR DAMAGE TO THE EQUIPMENT CAN OCCUR. (2) Obey all the electrical/electronic safety precautions (Refer to AMM 24−00−00−910−801). (3) Obey all the electrostatic discharge safety precautions (AMM 24−00−00−910−802). WARNING: OBEY ALL THE OXYGEN SAFETY PRECAUTIONS WHEN YOU DO WORK ON THE OXYGEN SYSTEM AND OXYGEN SYSTEM COMPONENTS. − MAKE SURE THE WORK AREA ADJACENT TO THE OXYGEN SYSTEM COMPONENTS IS CLEANED − MAKE SURE TO INSTALL A CAP ON ALL COMPONENTS OF THE OXYGEN SYSTEM THAT ARE DISCONNECTED. METAL OR PLASTIC CAPS ARE THE ONLY ACCEPTED ITEMS TO CAP COMPONENTS OF THE OXYGEN SYSTEM − MAKE SURE THE OXYGEN SYSTEM COMPONENTS THAT ARE INSTALLED ON THE AIRCRAFT ARE CLEAN IF YOU DO NOT OBEY THE SAFETY PRECAUTIONS, YOU CAN CAUSE A FIRE OR AN EXPLOSION.

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 9 of 42 June 23/2012 Revision B, May 06/2013 WARNING: DO NOT LET OIL, GREASE, OR SOLVENTS GET ON YOUR HANDS, CLOTHING, OR THE EQUIPMENT USED TO DO WORK ON THE OXYGEN SYSTEM. IF OXYGEN TOUCHES OIL, GREASE, OR SOLVENTS, THEY CAN START TO BURN. (4) Obey all the oxygen safety precautions (Refer to AMM 35−00−00−910−801). (5) Remove electrical power from the aircraft (Refer to AMM 24−00−00−861−802). (6) Open, safety, and tag the circuit breakers that follow:
CB PANEL CB NO. NAME ACPC ACPC CABIN FEED1 ACPC ACPC CABIN FEED2 CBP−1 M10 PASS SIGNS CBP−1 P4 LIGHTS CAB UTIL CBP−1 P8 PASS OXYGEN MANUAL DEPLOY R CBP−1 P9 PASS OXYGEN MANUAL DEPLOY L CBP−1 Q6 AUDIO PILOT CBP−1 Q7 AUDIO C/PLT CBP−1 Q8 AUDIO OBS CBP−1 LOWER S11 PWR SENS CBP−2 LOWER U3 EMER LTS CBP−2 LOWER V2 AUDIO PILOT CBP−2 B8 GALLEY EXHAUST FAN CBP−2 B11 GALLEY HEATER CBP−2 D8 WATER SYSTEM CBP−2 F11 GALLEY HEATER CONT CBP−2 H4 AUDIO OBS CBP−2 M6 LIGHTS GALLEY AREA CBP−2 P9 PASS OXYGEN AUTO DEPLOY R

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 10 of 42 June 23/2012 Revision B, May 06/2013 CB PANEL NAME CB NO. CBP−2 P10 PASS OXYGEN AUTO DEPLOY L CBP−2 P11 CREW OXYGEN MONITOR CBP−2 Q3 CABIN INPH CBP−2 Q4 PASS ADDR
(7) Depressurize the crew oxygen system (Refer to AMM 35−10−00−862−801). (8) Remove the oxygen mask stowage-box of the third crew (Refer to AMM 35−11−15−000−801). (9) Remove the entrance storage compartment (Refer to AMM 25−24−13−000−801). (10) Remove the flight compartment door (Refer to AMM 25−17−01−000−801). (11) Remove Galley 1 (Refer to AMM 25−31−01−000−802). (12) Remove the passenger compartment floor panels that follow:

PANEL NAME REFERENCE 231BLF Passenger Compartment Floor Panels AMM 53−00−47−000−802
232BRF Passenger Compartment Floor Panels AMM 53−00−47−000−802
(13) Remove the flight controls access−panel on the copilot side (Refer to AMM 53−12−32−000−801). (14) Remove the floor panel on the copilot side control−column floor−panel (Refer to AMM 25−15−10−00−801). (15) Remove the crew escape hatch (Refer to AMM 52−22−00−000−801). (16) Remove the oxygen pressure switch (Refer to AMM 35−11−09−000−801). (17) Open the main avionics-compartment door.

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 11 of 42 June 23/2012 Revision B, May 06/2013 (18) Remove the access panels that follow:

PANEL NAME REFERENCE 221DZ Pilot/copilot Side−Console Panel AMM 25−15−07−000−801 222DZ Pilot/Copilot Side−Console Panel AMM 25−15−07−000−801 132 AR Flight Controls Access Panel AMM 53−12−32−000−801

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 12 of 42 June 23/2012 Revision B, May 06/2013 B. Procedure Refer to Figure 1. (1) Remove and discard the oxygen flex hose (13) from the oxygen bottle between FS295.00 and FS310.00. (2) Remove and discard the oxygen flex hose (12) from the elbow fitting (26) between FS295.00 and FS280.00. (3) Remove and discard the two oxygen flex hoses (10) from the co-pilot and pilot stowage boxes between FS265.00 and FS250.00. Refer to Figure 2. (4) Clean the swaged end-fittings of the tubes and unions of the low-pressure crew oxygen system as follows: (5) Clean the two mating ends, male and female threaded parts, of every disassembled end-fitting with Methyl Propyl Ketone (MPK). NOTE: It is not necessary to remove the bonding jumpers. NOTE: You can loosen or remove clamps as necessary to get better access to the end-fittings. (a) At FS295.00, disconnect the 90-degree tube (9) from the bulkhead tee fitting (27). CAUTION:PUT PROTECTION BENEATH THE CLEANING AREA. THIS WILL PREVENT THE CLEANING FLUID FROM SPILLING ON AREAS AND CAUSE DAMAGE TO COMPONENTS. (b) With a clean cloth moisten with MPK, manually clean the swaged end-fittings of the 90-degree tube (9) and the bulkhead tee fitting (27). (c) Clean all the surfaces of the end-fitting, the 90-degree tube (9), and the threads of the bulkhead tee fitting (27). (d) Visually inspect all the surfaces to make sure that there is no oil residue on the end-fittings and the threads. (e) If necessary, do the manual cleaning operation again until the end-fittings and the threads are without contaminants.

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 13 of 42 June 23/2012 Revision B, May 06/2013 (f) When all the parts are cleaned and dried, connect the 90-degree tube (9) to the bulkhead tee fitting (27) at FS295.00. (6) Disconnect the vertical tube (7) and the observer tube (8) from the bulkhead tee fitting (27) at FS295.00. (7) Clean the two mating ends, male and female threaded parts, of every disassembled end fitting with MPK as follows: NOTE: It is not necessary to remove the bonding jumpers. NOTE: You can loosen or remove clamps as necessary to get better access to the end-fittings. CAUTION: PUT PROTECTION BENEATH THE CLEANING AREA. THIS WILL PREVENT THE CLEANING FLUID FROM SPILLING ON AREAS AND CAUSE DAMAGE TO COMPONENTS. (a) With a clean cloth moisten with MPK, manually clean the end-fittings of the vertical tube (7), the observer tube (8) and the bulkhead tee fittings (27). (b) Clean all the surfaces of the end-fitting, the vertical tube (7), the observer tube (8), and the bulkhead tee fittings (27). (c) Visually inspect all the surfaces to make sure that there is no oil residue on the end-fitting and the threads. (d) If necessary, do the manual cleaning operation again until the end-fittings and the threads are without contaminants. (e) When all the parts are cleaned and dried, connect the vertical tube (7) and the observer tube (8) to the bulkhead tee fitting (27) at FS295.00. (8) Disconnect the elbow fitting (26) from the observer tube (8) at FS295.00. (9) Clean the two mating ends, male and female threaded parts, of every disassembled end-fitting with MPK. CAUTION: PUT PROTECTION BENEATH THE CLEANING AREA. THIS WILL PREVENT THE CLEANING FLUID FROM SPILLING ON AREAS AND CAUSE DAMAGE TO COMPONENTS. (a) With a clean cloth moisten with MPK, manually clean the swage end-fittings of the observer tube (8) and the elbow fitting (26).

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 14 of 42 June 23/2012 Revision B, May 06/2013 (b) Clean all the surfaces of the end-fitting, the observer tube (8), and the elbow fitting (26). (c) Manually apply MPK on a cotton swab or a cloth and clean the inner wall of the elbow fitting (26). (d) Visually inspect all the surfaces to make sure that there is no oil residue on the end-fittings and the threads. (e) If necessary, do the manual cleaning operation again until the end-fittings and the threads are without contaminants. (f) When all the parts are cleaned and dried, connect elbow fitting (26) to the observer tube (8) at FS295.00. (10) Disconnect the vertical tube (7) from the lateral tube (4) between FS295.00 and FS280.00. (11) Clean the two mating ends, male and female threaded parts, of every disassembled end-fitting with MPK as follows: NOTE: It is not necessary to remove the bonding jumpers. NOTE: You can loosen or remove clamps as necessary to get better access to the end-fittings. CAUTION: PUT PROTECTION BENEATH THE CLEANING AREA. THIS WILL PREVENT THE CLEANING FLUID FROM SPILLING ON AREAS AND CAUSE DAMAGE TO COMPONENTS. (a) With a clean cloth moisten with MPK, manually clean the end-fittings of the vertical tube (7) and the end-fittings of the lateral tube (4). (b) Clean all the surfaces of the end-fitting, the vertical tube (7), and the lateral tube (4). (c) Visually inspect all the surfaces to make sure that there is no oil residue on the end-fittings and the threads. (d) If necessary, do the manual cleaning operation again until the end-fittings and the threads are without contaminants. (e) When all the parts are cleaned and dried, connect the vertical tube (7) to the lateral tube (4) between FS295.00 and FS280.00.

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 15 of 42 June 23/2012 Revision B, May 06/2013 (12) Disconnect the pilot tube (3) from the lateral tube (4) between FS295.00 and FS280.00. (13) Clean the two mating ends, male and female threaded parts, of every disassembled end-fitting with MPK as follows: NOTE: It is not necessary to remove the bonding jumpers. NOTE: You can loosen or remove clamps as necessary to get better access to the end-fittings. CAUTION: PUT PROTECTION BENEATH THE CLEANING AREA. THIS WILL PREVENT THE CLEANING FLUID FROM SPILLING ON AREAS AND CAUSE DAMAGE TO COMPONENTS. (a) With a clean cloth moisten with MPK, manually clean the end-fittings of the pilot tube (3) and the tee end-fittings of lateral tube (4). (b) Clean all the surfaces of the end-fittings, the pilot tube (3), and the lateral tube (4). (c) Visually inspect all the surfaces to make sure that there is no oil residue on the end-fittings and the threads. (d) If necessary, do the manual cleaning operation again until the end-fittings and the threads are without contaminants. (e) When all the parts are cleaned and dried, connect the pilot tube (3) to the lateral tube (4) between FS295.00 and FS280.00. (14) Disconnect the pilot tube (3), the union (14). and the pilot tube (1) at FS280.00. (15) Clean the two mating ends, male and female threaded parts, of every disassembled end-fitting with MPK as follows: NOTE: It is not necessary to remove the bonding jumpers. NOTE: You can loosen or remove clamps as necessary to get better access to the end-fittings. CAUTION: PUT PROTECTION BENEATH THE CLEANING AREA. THIS WILL PREVENT THE CLEANING FLUID FROM SPILLING ON AREAS AND CAUSE DAMAGE TO COMPONENTS.

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 16 of 42 June 23/2012 Revision B, May 06/2013 (a) With a clean cloth moisten with MPK, manually clean the end-fittings of the pilot tube (3), the end-fittings of the pilot tube (1) and threads of union (14) . (b) Clean all the surfaces of the end-fitting, the pilot tube (3), the pilot tube (1), and the union (14). (c) Visually inspect all the surfaces to make sure that there is no oil residue on the end-fittings and threads. (d) If necessary, do the manual cleaning operation again until the end-fittings and the threads are without contaminants. (e) When all the parts are cleaned and dried, connect the pilot tube (3) and the lateral pilot tube (1) to the union (14) at FS280.00. (16) Disconnect the lateral tube (4) from the lateral tube (5) between FS295.00 and FS280.00. (17) Clean the two mating ends, male and female threaded parts, of every disassembled end-fitting with MPK as follows: NOTE: It is not necessary to remove the bonding jumpers. NOTE: You can loosen or remove clamps as necessary to get better access to the end-fittings. CAUTION: PUT PROTECTION BENEATH THE CLEANING AREA. THIS WILL PREVENT THE CLEANING FLUID FROM SPILLING ON AREAS AND CAUSE DAMAGE TO COMPONENTS. (a) With a clean cloth moisten with MPK, manually clean the end-fittings of the lateral tube (4) and the end-fittings of the lateral tube (5). (b) Clean all the surfaces of the end-fitting, the lateral tube (4), and the lateral tube (5). (c) Visually inspect all the surfaces to make sure that there is no oil residue on the end-fittings and the threads. (d) If necessary, do the manual cleaning operation again until the end-fittings and the threads are free of contaminants. (e) When all the parts are cleaned and dried, connect the lateral tube (4) to the lateral tube (5) between FS295.00 and FS280.00.

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 17 of 42 June 23/2012 Revision B, May 06/2013 (18) Disconnect the lateral tube (5) from the lateral tube (6) between FS295.00 and FS280.00. (19) Clean both mating ends, male and female threaded parts, of every disassembled end-fitting with MPK as follows: NOTE: It is not necessary to remove the bonding jumpers. NOTE: You can loosen or remove clamps as necessary to get better access to the end-fittings. CAUTION: PUT PROTECTION BENEATH THE CLEANING AREA. THIS WILL PREVENT THE CLEANING FLUID FROM SPILLING ON AREAS AND CAUSE DAMAGE TO COMPONENTS. (a) With a clean cloth moisten with MPK, manually clean the swage end-fittings of the lateral tube (5) and the swage end-fittings of the lateral tube (6). (b) Clean all the surfaces of the end-fitting, the lateral tube (5), and the lateral tube (6). (c) Visually inspect all the surfaces to make sure that there is no oil residue on the end-fitting and the threads. (d) If necessary, do the manual cleaning operation again until the end-fittings and the threads are without contaminants. (e) When all the parts are cleaned and dried, connect the lateral tube (5) to the lateral tube (6) between FS295.00 and FS280.00. (20) Disconnect the lateral tube (6), the union (14), and the co-pilot tube (2) at FS280.00. (21) Clean both mating ends, male and female threaded parts, of every disassembled end-fitting with MPK as follows: NOTE: It is not necessary to remove the bonding jumpers. NOTE: You can loosen or remove clamps as necessary to get better access to the end-fittings.

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 18 of 42 June 23/2012 Revision B, May 06/2013 CAUTION: PUT PROTECTION BENEATH THE CLEANING AREA. THIS WILL PREVENT THE CLEANING FLUID FROM SPILLING ON AREAS AND CAUSE DAMAGE TO COMPONENTS. (a) With a clean cloth moisten with MPK, manually clean the swage end-fittings of the lateral tube (6), the co-pilot tube (2), and the union (14) threads. (b) Clean all the surfaces of end-fittings, the lateral tube (6), the co-pilot tube (2), and the union (14). (c) Visually inspect all the surfaces to make sure that there is no oil residue on the end-fitting and the threads. (d) If necessary, do the manual cleaning operation again until the end-fittings and the threads are without contaminants. (e) When all the parts are cleaned and dried, connect the lateral tube (6) and the co-pilot tube (2) to the union (14) at FS280.00. (22) Remove the union fitting (21) from the pilot and the co-pilot mask stowage-box between FS265.00 and FS250.00. CAUTION: PUT PROTECTION BENEATH THE CLEANING AREA. THIS WILL PREVENT THE CLEANING FLUID FROM SPILLING ON AREAS AND CAUSE DAMAGE TO COMPONENTS. (a) With a clean cloth moisten with MPK, manually clean the threads and the inner wall of the union fitting (21). (b) Clean all the surfaces of the threads and the inner diameter of the union fitting (21). (c) Visually inspect all the surfaces to make sure that there is no oil residue on the end-fittings and the threads. (d) If necessary, do the manual cleaning operation again until the threads and the inner diameter are without contaminants. (e) When all the parts are cleaned and dried, connect the union fitting (21) to the pilot, and the co-pilot mask stowage-box between FS265.00 and FS250.00. Refer to Figure 5.

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 19 of 42 June 23/2012 Revision B, May 06/2013 (23) Remove the union fitting (1) from the third crew mask stowage-box. CAUTION: PUT PROTECTION BENEATH THE CLEANING AREA. THIS WILL PREVENT THE CLEANING FLUID FROM SPILLING ON AREAS AND CAUSE DAMAGE TO COMPONENTS. (a) With a clean cloth moisten with MPK, manually clean the threads and in the inner wall of the union fitting (1). (b) Clean all surfaces of the threads and the inner diameter of the union fitting (1). (c) Visually inspect all surfaces to make sure that there is no oil residue on the end-fittings and the threads. (d) If necessary, do the manual cleaning operation again until the threads and the inner wall are without contaminants. (e) When the part is cleaned and dried, connect the union fitting (1) to the third crew mask stowage-box. Refer to Figure 1 . (24) Clean the union fitting (24) in the pilot and the co-pilot console as follows: NOTE: Do not remove the union fiting (24) from the pilot and the co-pilot floor console. Do the manual cleaning in the area of the upper end of the union fitting (24). CAUTION: PUT PROTECTION BENEATH THE CLEANING AREA. THIS WILL PREVENT THE CLEANING FLUID FROM SPILLING ON AREAS AND CAUSE DAMAGE TO COMPONENTS. (a) With a clean cloth moisten with MPK, manually clean the threads and the inner diameter of the union fitting (24) between FS265.00 and FS250.00. (b) Clean all surfaces of the threads and the inner diameter of the union fitting (24). (c) Visually inspect all surfaces to make sure there is no oil residue on the end-fittings and threads. (d) If necessary, do the manual cleaning operation again until the threads and the inner wall are without contaminants.

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 20 of 42 June 23/2012 Revision B, May 06/2013 (25) Manually clean the pressure switch as follows: CAUTION: MAKE SURE MPK DOES NOT GET I NTO THE PRES SURE SWITCH. MPK CAN CAUSE DAMAGE TO THE PRESSURE SWITCH. (a) With a clean cloth moisten with MPK, manually clean the threads of the pressure switch. (b) Clean all the surfaces of the threads of the pressure switch. (c) Visually inspect all the surfaces to make sure that there is no oil residue on the threads of the pressure switch. (d) If necessary, do the manual cleaning operation until the threads are without contaminants. (e) Do a detailed inspection of the pressure switch. Make sure there is no internal contamination. (f) If the pressure switch has signs of internal contamination, discard the pressure switch. Refer to Figure 3. (26) Do the preparation for the solvent flushing procedure of the crew-oxygen system in the cockpit as follows: NOTE: For solvent flushing tools 670BA35012 TOOL -1, 670BA35012 TOOL -2 and 670BA35012 TOOL -3, Refer to Appendix A. (a) Connect the hose assembly (50) with the female end-fitting (32) to the pilot union (24). (b) Connect the hose assembly (40) with the female end-fitting (32) to the copilot union (24). (c) Put the hose (15) through the opening at the base of the copilot control column and through the flight-control access-panel opening between FS169 and FS202. (d) Put the evacuation hose (15) in the graduated pail (28). (27) Prepare for the solvent flushing procedure of the crew oxygen system between FS295.00 and 280.00 as follows:

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 21 of 42 June 23/2012 Revision B, May 06/2013 NOTE: You can cut the inlet tube of the pump (17) to adjust to the height of the 5 US gallon (18.93 L) container of MPK. (a) Connect the male adapter (18) from the pump assembly (17) to the 90- degree tube (9). (b) Connect the hose assembly (60) with the female end-fitting (32) to the elbow fitting (26). (c) At the other end of the hose (60) close the lower end with the metal cap (16). (28) Do the solvent flushing procedure as follows: CAUTION: DURING THE SOLVENT FLUSHING, TWO PERSONS ARE NECES SARY. THIS W ILL PREVENT INJURIES TO PERSONNEL AND DAMAGE TO THE EQUIPMENT AND AIRCRAFT. (a) Put the 5 US gallon (18.93 L) container of MPK at the main doorstep. (b) With the pump assembly (17), fill the crew oxygen-system lines with MPK until the flow is stable and continuous. (c) Close the crew oxygen system with the metal cap (16) on the evacuation hose (15). Make sure that the oxygen lines stay filled and do not drain. (29) Do the solvent flushing of the upper portion of the oxygen system as follows: CAUTION: DURING THE SOLVENT FLUSHING, TWO PERSONS ARE NECES SARY. THIS W ILL PREVENT INJURIES TO PERSONNEL AND DAMAGE TO THE EQUIPMENT AND AIRCRAFT. (a) Hold the graduated pail (28) under the hose (60) at FS295.00. (b) Remove the metal cap (16) from the hose (60) between FS295.00 and FS280.00. (c) With the pump assembly (17), fill the upper stream of the crew oxygen system until the flow is stable and continuous. (d) Close the crew oxygen system with the metal cap (16) on the hose (60) between FS295.00 and FS280.00. Make sure that the oxygen lines stay filled and do not drain.

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 22 of 42 June 23/2012 Revision B, May 06/2013 (e) Let the MPK stay in the crew oxygen-system tubes for a minimum of 20 minutes. (30) Do the transfer of solvent in the upper stream of the oxygen system as follows: CAUTION: DURING THE SOLVENT FLUSHING, 2 PERSONS ARE NECESSARY. THIS W ILL PREVENT INJURIES TO PERSONNEL AND DAMAGE TO THE EQUIPMENT AND AIRCRAFT. CAUTION: PUT PROTECTION ON THE AREA BEFORE REMOVING THE METAL CAP (16). THIS WILL PREVENT INJURIES TO PERSONNEL AND DAMAGE TO THE EQUIPMENT AND AIRCRAFT. (a) Hold the graduated pail (28) under the hose (60) at FS295.00. (b) Remove the metal cap (16) from the hose (60) at FS295.00. (c) With the pump assembly (17) transfer 0.5 US gallon (1.9 L) into the graduated pail (28) at FS295.00. (d) Close the crew oxygen system with the metal cap (16) on the hose (60) between FS295.00 and FS280.00. (31) Do the transfer of solvent in the down stream of the oxygen system as follows: CAUTION: DURING THE SOLVENT FLUSHING, 2 PERSONS ARE NECESSARY. THIS W ILL PREVENT INJURIES TO PERSONNEL AND DAMAGE TO THE EQUIPMENT AND AIRCRAFT. (a) Remove the metal cap (16) from the evacuation hose (15) at the graduated pail (28). (b) With the pump assembly (17), transfer 2.5 US gallon (9.5 L) from the 5 US gallon (18.93 L) container into the graduated pail (28). CAUTION:PUT PROTECTION ON THE AREA BEFORE YOU REMOVE THE PUMP ASSEMBLY (17). THIS WILL PREVENT INJURIES TO PERSONNEL AND DAMAGE TO THE EQUIPMENT AND AIRCRAFT. (c) Remove the pump assembly (17) from the 90-degree tube (9) at FS295.00. (d) Remove the 5 US gallon (18.93 L) container at the main doorstep.

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 23 of 42 June 23/2012 Revision B, May 06/2013 Refer to Figure 4. (32) Remove the remaining solvent from the observer tube as follows: CAUTION: DURING THE REMOVAL OF THE MPK, TWO PERSONS ARE NECESSARY. THIS WILL PREVENT INJURIES TO PERSONNEL AND DAMAGE TO THE EQUIPMENT AND AIRCRAFT. (a) Remove the metal cap (16) from the hose (60) at FS295.00. (b) Connect the nitrogen supply (29) to the 90-degree tube (9) at FS295.00. NOTE: Use the shortest hose possible to connect the nitrogen supply to the 90 degree tube. (c) Close the crew oxygen system with the metal cap (16) on the evacuation hose (15). (d) Hold the hose (60) with one hand and hold a clean cloth with the other hand at the open end of the hose (60) between FS295.00 and FS280.00. (e) Gradually open the nitrogen supply (29) to 80 psi (5.52 BAR). (f) Let the nitrogen flow for a minimum of one minute and until no solvent spits out. (g) Gradually close the nitrogen supply to 10 psi maximum (0.69 BAR). (h) Loosen the metal cap (16) from the evacuation hose (15) and hold the evacuation hose (15) in the collector pail (25). (i) Close the crew oxygen system with the metal cap (16) on the hose (60) between FS295.00 and FS280.00. (j) Remove the metal cap (16) from the evacuation hose (15). (33) Remove the solvent in the crew oxygen tubes as follows: CAUTION: DURING THE REMOVAL OF THE MPK IN THE CREW OXYGEN TUBES, TWO PERSONS ARE NECESSARY. THIS WILL PREVENT INJURIES TO PERSONNEL AND DAMAGE TO THE EQUIPMENT AND AIRCRAFT. (a) Hold the evacuation hose (15) in the collector pail (25) at the beginning.

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 24 of 42 June 23/2012 Revision B, May 06/2013 (b) Gradually open the nitrogen supply (29) to 80 psi (5.52 BAR). (c) Gradually remove the evacuation hose (15) from the collector pail (25) and hold a cloth at the end of the evacuation hose (15). (d) Let the nitrogen flow for a minimum of one minute and until no solvent spits out. (e) Close the nitrogen supply (29). Refer to Figure 3. (f) Disconnect the hose assembly (50) from the union (24). (g) Disconnect the hose assembly (40) from the union (24). Refer to Figure 4. (h) Disconnect the hose assembly (60) from the elbow fitting (26). (i) Gradually open the nitrogen supply (29) to 10 psi (0.69 BAR). Refer to Figure 3. (j) Make sure there is a flow of nitrogen at the unions (24) on the pilot and the copilot side. Refer to Figure 4. (k) Make sure there is a flow of nitrogen at the elbow fitting (26). (l) Let nitrogen flow in the system for 10 minutes. (m) Close the nitrogen supply. (n) Connect the hose assembly (60) from the elbow fitting (26). Refer to Figure 3. (o) Connect the hose assembly (50) from the union (24). (p) Connect the hose assembly (40) from the union (24). (q) Install the metal cap (16) on the evacuation hose (15). Refer to Figure 4.

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 25 of 42 June 23/2012 Revision B, May 06/2013 (r) Make sure the metal cap (16) is removed from the hose assembly (60) (s) Hold the hose (60) with one hand and hold a clean cloth with the other hand at the open end of the hose (60) between FS295.00 and FS280.00. (t) Gradually open the nitrogen supply to 80 psi (5.52 BAR). (u) Let the nitrogen flow for a minimum of one minute. (v) Make sure no liquid spits out. (w) Close the nitrogen supply (29). (x) Install the metal cap (16) on the hose assembly (60). (y) Remove the metal cap (16) from the evacuation hose (15). (z) Hold the hose (15) with one hand and hold a clean cloth with the other hand at the open end of the hose (15). (aa) Gradually open the nitrogen supply (29) to 80 psi (5.52 BAR). (ab) Let the nitrogen flow for a minimum of one minute. (ac) Make sure no liquid spits out. (ad) Close the nitrogen supply (29). (ae) Remove the nitrogen supply (29) from the 90−degree tube (9) at FS295.00. Refer to Figure 3. (34) Remove parts of the flushing and drying procedure of the crew oxygen system as follows: CAUTION: DO NOT USE THE SOLVENT FROM THE COLLECTOR PAIL (25) AND THE GRADUATED PAIL (28) FOR ANOTHER CLEANING PROCEDURE OF THE CREW O XYGEN SYSTEM. THE MPK COLLECTED DURING THE PROCEDURE IS CONTAMINATED. (a) Remove the graduated pail (28) and the collector pail (25).

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 26 of 42 June 23/2012 Revision B, May 06/2013 (b) Remove the hose assembly (40), (50) and (15) with the female end-fittings (32) at the union (24) from the pilot and copilot side console panel . CAUTION: DO NOT USE MPK FROM THE GRADUATED PAIL (28) FOR ANOTHER CLEANING PROCEDURE OF THE CREW OXYGEN SYSTEM. THE MPK COLLECTED DURING THE PROCEDURE IS DIRTY. (c) Remove the graduated pail (28) between FS295.00 and FS280.00. (d) Remove the hose assembly (60) with the female end-fitting (32) at the elbow fitting (26) between FS295.00 and FS280.00 . Refer to Figure 1. (35) Install the flex hose (10) on the union (24) and on the fitting adapter (21) on the stowage box (30) at the pilot and the copilot console. (36) Install the flex hose (12) at the elbow fitting (26) between FS295.00 and FS280.00. (37) Close the flex hose (12) with the metal cap (16) between FS295.00 and FS280.00. (38) Install the oxygen pressure switch (Refer to AMM 35−11−09−400−801). (39) If removed install the oxygen cylinder (Refer to AMM 35−11−03−400−801). (40) Install the flex hose (13) on the oxygen cylinder (11) and on the oxygen pressure switch at FS295.00. (41) If clamps were loosen or removed during the manual cleaning procedure, install the clamps and torque the threaded fasteners (Refer to AMM 20−21−00−910−801). (42) If humiseal was removed from the bonding jumper of the oxygen crew lines during the manual cleaning procedure, apply humiseal on the bonding jumper.

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 27 of 42 June 23/2012 Revision B, May 06/2013 C. Job Close-Out (1) Remove all tools, equipment, and unwanted materials from the work area. (2) Obey all the oxygen safety precautions (Refer to AMM 35−00−00−910−801). (3) Obey all the oxygen servicing safety precautions (Refer to AMM 35−00−00−910−802). (4) Do the servicing of the crew oxygen system (Refer to AMM 12−16−35−614−801). (5) Pressurize the crew oxygen system (Refer to AMM 35−10−00−862−802). (6) Do the leak test of the crew oxygen system (Refer to AMM 35−10−00−790−801). (7) Depressurize the crew oxygen system (Refer to AMM 35−10−00−862−801). (8) Install the passenger compartment floor-panels that follow:

PANEL NAME REFERENCE 231BLF Passenger Compartment Floor Panels AMM 53−00−47−400−802
232BRF Passenger Compartment Floor Panels AMM 53−00−47−400−802
132 AR Flight Controls Access Panel AMM 53−12−32−400−801 (9) Install Galley 1 (Refer to AMM 25−31−01−400−802). (10) Install the flight compartment door (Refer to AMM 25−17−01−400−801). (11) Install the entrance storage compartment (Refer to AMM 25−24−13−400−801). (12) Remove the the metal cap (16) from the flex hose between FS295.00 and FS280.00. (13) Install the oxygen mask stowage-box of the third crew (Refer to AMM 35−11−15−400−801).

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 28 of 42 June 23/2012 Revision B, May 06/2013 (14) Install the right-hand side flight controls access-panel 132 AR (Refer to AMM 53−12−32−400−801). (15) Install the copilot column floor-panel (Refer to AMM 25−15−10−400−801). (16) Install the crew escape hatch (Refer to AMM 52−22−00−400−801). (17) Remove the tags and close the circuit breakers that follow:
CB PANEL CB NO. NAME ACPC ACPC CABIN FEED1 ACPC ACPC CABIN FEED2 CBP−1 M10 PASS SIGNS CBP−1 P4 LIGHTS CAB UTIL CBP−1 P8 PASS OXYGEN MANUAL DEPLOY R CBP−1 P9 PASS OXYGEN MANUAL DEPLOY L CBP−1 Q6 AUDIO PILOT CBP−1 Q7 AUDIO C/PLT CBP−1 Q8 AUDIO OBS CBP−1 LOWER S11 PWR SENS CBP−2 LOWER U3 EMER LTS CBP−2 LOWER V2 AUDIO PILOT CBP−2 B8 GALLEY EXHAUST FAN CBP−2 B11 GALLEY HEATER CBP−2 D8 WATER SYSTEM CBP−2 F11 GALLEY HEATER CONT CBP−2 H4 AUDIO OBS CBP−2 M6 LIGHTS GALLEY AREA CBP−2 P9 PASS OXYGEN AUTO DEPLOY R CBP−2 P10 PASS OXYGEN AUTO DEPLOY L CBP−2 P11 CREW OXYGEN MONITOR

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 29 of 42 June 23/2012 Revision B, May 06/2013 CB PANEL NAME CB NO. CBP−2 Q3 CABIN INPH CBP−2 Q4 PASS ADDR
(18) Install the access panels that follow:
PANEL NAME REFERENCE 221DZ Pilot/copilot Side−Console Panel AMM 25−15−07−400−801
222DZ Pilot/Copilot Side−Console Panel AMM 25−15−07−400−801
(19) Do the servicing of the crew oxygen system (Refer to AMM 12−16−35−614−801) (20) Pressurize the crew oxygen system (Refer to AMM 35−10−00−862−802) (21) Do the leak test of the crew oxygen system (Refer to AMM 35−10−00−790−801). (22) Do the operational test of the crew oxygen system as follows: (a) On the pilot oxygen mask stowage-box, push and hold down the PRESS TO TEST AND RETEST lever for two to three seconds. (b) Make sure that the flow indicator shows a yellow cross which changes to black. (c) Repeat steps (a) and (b) two times for the three oxygen stowage boxes. (23) Close the main avionics-compartment door. (24) When this service bulletin is completed, make this entry in the applicablelogbooks: Service Bulletin 670BA−35−012 Revision B, Oxygen − Crew Oxygen System − In-Service Crew-Oxygen-System Cleaning, incorporated."

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 30 of 42 June 23/2012 Revision B, May 06/2013 Removal and Installation of Flex Hoses Figure 1 (Sheet 1 of 1)ba7416a01.cgm_cr/25−apr−2012 B A A B C

C 13 8 D D

FS295.00 FS295.00

PILOT MASK STOWAGE BOX (REF)

D FS265.00

RIGHT SIDE SHOWN LEFT SIDE SIMILAR 24 26

12

21 10 LEGEND 8. Tube, observer. 10. Flex hose. 12. Flex hose. 13. Flex hose. 21. Fitting adapter. 24. Union fitting. 26. Elbow fitting.

COCKPIT FLOOR (REF)

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 31 of 42 June 23/2012 Revision B, May 06/2013 Manual Cleaning End−Fittings and Threads Figure 2 (Sheet 1 of 3)ba7417a01.cgm/cr/25−apr−2012 A

A PILOT MASK STOWAGE BOX (REF) BULKHEAD TEE FITTING (REF)

B

C

D

E F F END FITTING (REF) END FITTING (REF)

END FITTING (REF) BULKHEAD FITTING (REF) END FITTING (REF) FITTING (REF)

TEE FITTING (REF) BULKHEAD FITTING (REF) COPILOT MASK STOWAGE BOX (REF)

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 32 of 42 June 23/2012 Revision B, May 06/2013 Manual Cleaning End−Fittings and Threads Figure 2 (Sheet 2 of 3)ba7417a02.cgm/cr/26−apr−2012 9

27 7 26

B FS295.00

8

C 7

1 14 3 4 LEGEND 1. Pilot tube. 3. Pilot tube. 4. Lateral tube. 7. Vertical tube. 8. Obsrever tube. 9. 90 degree tube. 14. Union. 26. Elbow fitting. 27. Bulkhead tree fitting.

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 33 of 42 June 23/2012 Revision B, May 06/2013 Manual Cleaning End−Fittings and Threads Figure 2 (Sheet 3 of 3) 5
4 6

D

LEGEND 2. Co

− Pilot tube. 4. Lateral tube. 5. Lateral tube. 6. Lateral tube. 14. Union. 21. Fitting adapter. 24. Bulkhead union fitting. 30. Mask stowage box. FS295.00 RBL37.00 2 14 6

Eba7417a03.cgm/cr/rb, 25−apr−2012 FS265.00

LBL12.00 RBL12.00

RIGHT SIDE SHOWN LEFT SIDE SIMILAR F 30

24

COCKPIT FLOOR (REF) 21

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 34 of 42 June 23/2012 Revision B, May 06/2013 Flushing of the Oxygen System Figure 3 (Sheet 1 of 3)ba7421a01.cgm_sd, 5 oct 2012

A A

B FS295.00 B

20 17 9

26 FS295.00

32

60

32 16 8

9

18 C

17 (REF) LEGEND 8. Tube, observer. 9. 90

− Degree tube. 16. Metal cap. 17. Manual drum pump. 18. Male end

− adapter. 20. 5 gallons (18.93L). 24. Bulkhead union

− fitting. 28. Graduated pail. 32. Female end

− fitting. 60. Hose assembly.

28

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 35 of 42 June 23/2012 Revision B, May 06/2013 Flushing of the Oxygen System Figure 3 (Sheet 2 of 3)ba7421a02.cgm, sd 19juillet/2012

50 C D

E

D 40 D

RIGHT SIDE SHOWN LEFT SIDE SIMILAR 24 32 50 40

COCKPIT FLOOR (REF) 15

E 50 15

40 LEGEND 15. Hose assembly. 24. Union fitting. 32. Female end

− fitting. 40. Hose assembly. 50. Hose assembly.

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 36 of 42 June 23/2012 Revision B, May 06/2013 Flushing of the Oxygen System Figure 3 (Sheet 3 of 3)ba7421a03.cgm, sd, 5 oct 2012 28

15

16 15

32 25

LEGEND 15. Hose assembly. 16. Metal cap. 25. Collector pail. 28. Graduated pail. 32. End fitting. G

F

G

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 37 of 42 June 23/2012 Revision B, May 06/2013 Purging and Drying the Oxygen System Figure 4 (Sheet 1 of 2)ba7424a01.cgm_cr/27−apr−2012

A A

B FS295.00 B 9

26 FS295.00

8

9

29 LEGEND 8. Tube, observer. 9. 90

− Degree tube. 15. Hose assembly. 16. Metal cap. 18. Male end

− adapter 24. Bulkhead union

− fitting. 26. Elbow fitting. 29. Nitrogen supply. 32. Female end

− fitting. 60. Hose assembly.

29

32

60

32 16 C

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 38 of 42 June 23/2012 Revision B, May 06/2013 Purging and Drying the Oxygen System Figure 4 (Sheet 2 of 2) 25ba7424a02.cgm_cr/27−apr−2012 C

D D

15

16 LEGEND 15. Hose assembly. 16. Metal cap. 25. Collector pail. 32. Female end fitting. 15

32

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 39 of 42 June 23/2012 Revision B, May 06/2013 Third Crew Mask Stowage Box Figure 5 (Sheet 1 of 1)ba7524a01.cgm, sd 19juillet/2012

A THIRD CREW MASK STOWAGE BOX (REF)

CONNECTOR LEGEND 1. Union fitting. A

1

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 40 of 42 June 23/2012 Revision B, May 06/2013 3. MATERIAL INFORMATION

A. Kit Information Kit Contents:

KIT 670BA35012K1 PART NUMBER QUANTITY NAME ALTERNATE PARTS NOTES
38019−5−0110 2 Flex Hose Assembly Pilot and Co−Pilot − − S6946−03 1 Flex Hose Assembly Observer − − S6946−04 1 Flex Hose Assembly Regulator − −

KIT 670BA35012K90A
PART NUMBER QUANTITY NAME ALTERNATE PARTS NOTES
0208P−8−4 1 Brass Reducer Coupling −
125HBL−4−4 1 Brass Barbed Fitting − 2808K171 1 Tee Fitting − 30182−8−12b 1 Brass Barbed Fitting − 4HA27 1 Drum Pump Assembly − 5229−05 5 Plug Male (JIC) 37o − 5388K14 10 Hose Clamps − 5388K24 1 Hose Clamps − 5549K33 1 2 Feet hose, Polyurethane Tubing 1/4" ID, 3/8" OD −

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 41 of 42 June 23/2012 Revision B, May 06/2013 PART NUMBER NOTES ALTERNATE PARTS NAME QUANTITY
5549K35 1 25 Feet hose, Polyurethane Tubing 5/16" ID, 7/16" OD −

M12510−04−05 1 Adapter,1/4 ID, Male Thread −
M22512−05−05 5 End Fittings, Female −Equivalent or commercially available equipment that can be used with MPK solvent.

KIT 670BA35012K91 PART NUMBER QUANTITY NAME ALTERNATE PARTS NOTES
0208P−8−4 1 Brass Reducer Coupling −
5549K33 1 2 Feet hose, Polyurethane Tubing 1/4" ID, 3/8" OD −

5549K35 1 25 Feet hose, Polyurethane Tubing 5/16" ID, 7/16" OD −

Equivalent or commercially available equipment that can be used with MPK solvent.

B. Consumable Information The materials that follow are necessary to do this service bulletin. You can order them from Bombardier or purchase them directly from industry sources. If the material is ordered from Bombardier, there can be some lead time because of the shelf life of the material. CONSUMABLES SPECIFICATION QUANTITY NAME REFERENCE MIL−STD−608 5 Gallon Methyl Propyl Ketone (UHP)  

### SERVICE BULLETIN 670BA−35−012

SB 670BA−35−012 Page 42 of 42 June 23/2012 Revision B, May 06/2013 SPECIFICATION REFERENCE NAME QUANTITY Cloth, Lint−Free Cotton As necessary Cloth 05−332 Protective coating As necessary Humiseal−1B15 09−021 Refer to AMM 51−31−00−992−801.  You can use Methyl Ethyl Ketone ASTM D740 Type 1 at same purity.  UHP (Ultra High Purity) = 99.5% minimum
NOTE: To complete this list of consumables, refer to the different tasks as references in this service bulletin. C. Special Tools and Equipment

SPECIAL TOOLS AND EQUIPMENT PART NUMBER QUANTITY NAME ALTERNATE PARTS S−7914WS 1 Pail, 5 Gallon capacity F−1727−001 1 Wash Bottle (ProlabScientific) 7002 2 Graduated Pail (#7002 Gemblers) Equivalent or commercially available equipment that can sustain MPK solvent.
NOTE: To complete this list of special tools and equipment, refer to the different tasks, and the appendix that are given as references in this service bulletin.
D. Disposition of Parts Not applicable.

1APPENDIX A Page A1 of A4 June 23/2012 Revision B, May 06/2013 

## PROCEDURE

The procedure contained in this appendix are given as references in the ACCOMPLISHMENT INSTRUCTIONS of Service Bulletin 670BA ---35---012.

### APPENDIX A

APPENDIX A Page A2 of A4 June 23/2012 Revision B, May 06/2013



### Appendix A gives the procedure to do the assembly of the materials for the cleaning and flushing procedures given in Service Bulletin 670BA ---35 ---012

.

Parts for tool assemblies 670BA35012--TOOL--1, 670BA35012--TOOL--2 and 670BA35012--TOOL--3 PART NUMBER QUANTITY NAME ALTERNATE PARTS NOTES
4HA27 1 Manual Drum Pump

--- --- 5388K14 12 Hose Clamps

--- --- 5388K24 1 Hose Clamps

--- --- 5549K33 1 Hose, Fluid Resistant Polyurethane Tubing 1/4” ID, 3/8” OD --- 2 Feet hoses
5549K35 1 Hose, Fluid Resistant Polyurethane Tubing 5/16” ID, 7/16” OD --- 25 Feet hoses
M22512---05---05 5 End-Fitting Female Adapter --- ---
2808K171 1 Tee Fitting

--- --- M12510---04---05 1 End Fitting Male Adapter --- ---
30182---8---12b 1 Brass Barbed Fitting

--- --- 0208P ---8---4 1 Brass Reducer Fitting

--- --- 125HBL ---4---4 1 Brass Reducer Coupling --- ---

### APPENDIX A

APPENDIX A Page A3 of A4 June 23/2012 Revision B, May 06/2013 Refer to Figure 1 A. 1. Make 670BA35012---TOOL ---1 as follows: A. Cut hose part number (P/N) 5549K35 to a length of 60 in. (40.64 cm.), to make item (60)

. B. At the two ends of the hose (60), install the female end-fittings (32) and attach with the clamp (19). 2. Make 670BA35012---TOOL ---2 as follows: A. Cut hose P/N 5549K35 to a length of 16 in. (40.64 cm.), to make item (40). B. At one end of the hose (40), install the female end-fitting (32) and attach with the clamp (19). C. At the other end of the hose (40), install the tee fitting (33) and attach with the clamp (19). D. Cut hose P/N 5549K35 to a length of 6 ft (1.82 m.), to make item (50). E. At one end of the hose (50), install the female end-fitting (32) and attach with the clamp (19). F. At the other end of the hose (50), install on the tee fitting (33) and attach with the clamp (19). G. Cut hose P/N 5549K35 to a length of 10 ft (3.05 m.), to make item (15). H. At one end of the hose (15), install the female end-fitting (32) and attach with the clamp (19). I. At the other end, install the hose (15) on the tee fitting (33) and attach with the clamp (19). 3. Make 670BA35012---TOOL ---3 as follows: A. Assemble the brass barbed fitting (66) with the brass reducer coupling (67) and the brass male barbed (68).

### APPENDIX A

APPENDIX A Page A4 of A4 June 23/2012 Revision B, May 06/2013 B. Cut hose P/N 5549K33 to a length of 24 in. (60.9 cm.), to make item (65). C. Install the hose (65) on the brass male fitting (68) and attach with the clamp (19). D. At the other end of the hose (65) install the male end-adapter (18) and attach with the clamp (19). E. Install the manual drum pump (17) on the brass barbed fitting (66) and attach with the clamp (69).

### APPENDIX A

APPENDIX A Page A5 of A4 June 23/2012 Revision B, May 06/2013 Special Tools and Equipement Figure 1 (Sheet 1 of 1)ba7487a01.cgm, cr,fp, 6--May--2013 LEGEND 15. Hose, 10 ft. (3.05 m) 5549K35. 17. Manual drum pump 4HA27. 18. Male end--adapter M12510--04--05. 19. Hose clamp 5388K14. 32. End--fitting female adapter M22512--05--05. 33. Tee--fitting 2808K171. 40. Hose, 18 in. (45.7 cm) 5549K35. 50. Hose, 6 ft. (1.82 m) 5549K35. 60. Hose, 60 in. (1.52 m) 5549K35. 65. Hose, 24 in. (60.9 cm) 5549K33. 66. Brass barbed fitting 30182--8--12b. 67. Brass reducer coupling 0208P--8--4. 68. Brass male barbed fitting 125HLB--44. 69. Clamp 5388K24.

670BA35012--TOOL--3 66

67 DRUM PUMP (REF)

17

68

65

18 32 19 60 19 32

670BA35012--TOOL--1
32 19 50 19 33 19 40

32 32 19 15

19

670BA35012--TOOL--2 19

19

19 69THANK YOU FOR ANSWERING THIS EVALUATION FORM UPON COMPLETION OF THIS EVALUATION FORM/COMPLIANCE SHEET, FAX TO 450-476-7300 or email to CRJ_SB_Evaluation_Form@aero.bombardier.com 

### SERVICE BULLETIN EVALUATI ON FORM/COMPLIANCE SHEET (YOUR IDEAS WILL HELP US PROVIDE BETTER BULLETINS)
SERVICE BULLETIN : ISSUE:

STRONGLY DISAGREE NEUTRAL AGREE STRONGLY DISAGREE AGREE
 Instructions to do the Service Bulletin were accurate. Comments: 

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 Illustration(s), figure(s), picture(s) and/or kit drawing(s) were helpful to carry out instructions. Comments: 

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 If a parts kit was required, did the kit contents received agree with the contents listed in the bulletin? Comments: 

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 Aircraft hands-on work was accomplished in estimated time. Comments: 

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 Overall, I was satisfied with this Service Bulletin. Comments: 

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PLEASE SUPPLY US WITH THE FOLLOWING DATA AND FAX TO (450) 476-7300: OPERATOR: NAME (Please print) SERVICE CENTER: TELEPHONE: AIRCRAFT SERIAL NO.: FACSIMILE: DATE OF SB INCORPOARTION