# Bombardier Service Bulletin 601R-35-018

Copy: Revision A ("U.S. DOT/FAA - SB 601R-35-018"), 15 pages: PDF https://openairdocs.org/files/sha256/36/9b/369bbcd6fdf1da95866f0fbfa6fe2de4d376d0d503bbe695acf72c43a913e2e7; text https://openairdocs.org/service-documents/bombardier/601r-35-018/file/369bbcd6fdf1.md. Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2015-0823; AD 2015-17-16 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: 601R-35-018
- Latest revision known: 601R-35-018, Revision A, dated May 21, 2013 (OpenAirDocs)
- Page: https://openairdocs.org/service-documents/bombardier/601r-35-018

## ADs that cite it (1) (OpenAirDocs)

Newest first, with the revision each names, as OpenAirDocs read it from the AD's text.

- [AD 2015-17-16](https://openairdocs.org/ad/2015-17-16.md), effective Oct 2, 2015: Revision A, and with none named

Also cited in [1 proposed AD](https://openairdocs.org/service-documents/bombardier/601r-35-018/proposed.md).

## Text (15 pages)

Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2015-0823; AD 2015-17-16 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. Some pages are OCR from a scan. OCR can misread letters and numbers. Each page's text from the PDF; open the PDF at a page with #page=N.

### Page 1

SB 601R- - - 35- - - 018
Page 1 of 14
May 21/2013
SERVICE BULLETIN
T echnical
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- - -11 NUMBER: 601R - - -35- - -018
S U B J E C T: O x y g e n --- S u p p l y S y s t e m --- R e p l a c e m e n t o f t h e O x y g e n D i s c h a r g e --- H o s e
1. PLANNING INFORMATION
A. Effectivity
(1) Aircraft Affected:
Service: CL- - - 600- - - 2B19 aircraft with serial numbers 7003 thru 7067,
7069 thru 7990, 8000 thru 8999.
Production: There is no production effectivity.
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 STC, STA or e quivalent action changes to make
sure you can complete this service bulletin.

### Page 2

SERVICE BULLETIN 601R- - -35- - -018
SB 601R- - - 35- - - 018
Page 2 of 14
May 21/2013
B. Reason
(1) Condition
T h eb u r s tp r e s s u r eo ft h ef l e x i b l eh o s eu s e dt ov e n to x y g e nf r o mt h e
high- - -pressure relief- - -device of the oxygen cylinder overboard is lower than
the opening pressure of the high- - -pressure relief- - -device. This can cause the
flexible hose to burst before it could vent the excess oxygen overboard.
(2) Evidence
This was found during an analysis of the oxygen system by the
manufacturing- - -engineering department.
(3) Objective/Benefit
T h i ss e r v i c eb u l l e t i ng i v et h ep r o c e d u r et or e p l a c et h ef l e x i b l eh o s eo ft h e
o x y g e n --- d i s c h a r g e s y s t e m b y a n e w m e t a l l i c f l e x i b l e --- h o s e . T h i s w i l l p r e v e n t
t h ef l e x i b l eh o s et ob u r s ti ft h eh i g h - - - p r e s s u r er e l i e f - - - d e v i c eo p e n s .
C. Description
The main avionics- - -compartment door is opened. The oxygen supply is closed and
the oxygen pressure is bled.
T h ef l e x i b l eh o s eo ft h eo x y g e n - - - d i s c h a r g es y s t e mi sr e m o v e da n dd i s c a r d e d .A
new metallic flexible hose and a bonding jumper are installed.
The oxygen supply is opened, and an operational test of the crew oxygen system is
done.
D. Compliance
Recommended Service Bulletin.
Bombardier recommends that this service bulletin be done at no more than 5800
flight hours or 44 months, whichever comes first, from the release date on this
service bulletin, unless otherwise directed by the airworthiness authority of the
operator.
This service bulletin does not affect Airworthiness Limitations (AWLs) or Damage
T olerance Inspections (DTIs).
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.

### Page 3

SERVICE BULLETIN 601R- - -35- - -018
SB 601R- - - 35- - - 018
Page 3 of 14
May 21/2013
F. M a n p o w e r
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 2.0 man-hours to complete this service bulletin. The
man-hours are divided in the table that follows (elapsed cure time is not included in
the man-hour summary given above):
TASK MAN-HOURS
(1) Job Set-Up 0.25
(2) Procedure 1.0
(3) T est 0.5
(4) Job Close-Out 0.25
G. Material - - - Price and Availability
(1) The kits in the tables that follow are available from Bombardier Commercial
Aircraft.

### Page 4

SERVICE BULLETIN 601R- - -35- - -018
SB 601R- - - 35- - - 018
Page 4 of 14
May 21/2013
NOTE: For a list of kit contents, refer to paragraph 3.A.
KIT NUMBER NAME
601R35- - - 018K1 Oxygen Hose Replacement
(2) Please send a purchase order to the address below to schedule kit delivery:
Bombardier
Service Bulletin Kit Support T eam
123 Garratt Blvd, N42- - - 24
T oronto, Ontario
Canada M3K 1Y5
Fax: 416-375-3060
Phone: 416-375-3920
Email: sbkits@aero.bombardier.com
Please contact the Service Bulletin Kit Support T eam at the address above for
terms and conditions.
(3) Refer to paragraph 3.B. for a list of consumables for this service bulletin.
For Business/Corporate Operators
All Business/Corporate operators (i.e. operators who do not have a commercial
airline operation) refer to SB 800-00-004 for commercial policy coverage and
logistics/planning arrangements (refer to www.cic.bombardier.com/technical
library/service bulletins/challenger/850/SB 800-00-004).
T o place an order for parts or kits, please call Bombardier Parts Logistics at
514-855-2999 or 1-866-538-1247.
H. T ooling - - - Price and Availability
There are no tool kits for this service bulletin. Refer to paragraph 3.C. for a list of
special tools and equipment for this service bulletin.
I. Weight and Balance
WEIGHT ARM MOMENT ¡
+0 . 6l b . + 202.5 in. + 0.122 ( 1000 lb-in.)
+0 . 2 7k g +5 . 1 4m + 0.0014 (1000 kg-m)
¡ The value in the Moment column is divided by 1000.
Refer to Weight and Balance Manual CSP A- - - 041.

### Page 5

SERVICE BULLETIN 601R- - -35- - -018
SB 601R- - - 35- - - 018
Page 5 of 14
May 21/2013
J. Electrical Load Data
Not changed.
K. References
Restriction and/or Special Instruction (RSI) C- - -A280, Revision B
Modification Summary TC601R18254, Revision D
Aircraft Maintenance Manual (AMM)
For Bombardier reference only: PCA 6494
Refer to the SB Introduction document for definition or explanation of Service
Bulletin content.
L. Other Publications Affected
Aircraft Maintenance Manual (AMM)
Aircraft Illustrated Parts Catalogue (AIPC)
M. Relationship Chart
PRE-SB
PART NUMBER NAME POST-SBPART NUMBER NAME
38026- - - 4- - - 0280- - - 000Oxygen HoseAssembly 601R44045- - - 1 Hose Assembly

### Page 6

SERVICE BULLETIN 601R- - -35- - -018
SB 601R- - - 35- - - 018
Page 6 of 14
May 21/2013
2. ACCOMPLISHMENT INSTRUCTIONS
Reference Information
REFERENCE DESIGNATION
A M M 1 2 --- 1 6 --- 3 5 --- 6 1 4 --- 8 0 1 Crew Oxygen System - - - Servicing
A M M 2 0 --- 2 1 --- 0 0 --- 9 1 0 --- 8 0 2 T orque Procedures for Plumbing Lines
A M M 2 0 --- 2 2 --- 0 1 --- 9 1 0 --- 8 0 1Application of Thread Compounds and T ape to
Threaded Fittings on Plumbing Lines
A M M 3 5 --- 0 0 --- 0 0 --- 9 1 0 --- 0 0 1 Oxygen Safety Precautions
A M M 3 5 --- 1 0 --- 0 0 --- 7 1 0 --- 8 0 2Operational T est of the Crew Oxygen System
A M M 5 1 --- 8 0 --- 0 0 --- 4 0 0 --- 8 0 3Installation of Clamps and Electrical Bonding
Jumpers
A M M 5 1 --- 8 0 --- 0 0 --- 1 0 0 --- 8 0 2Surface Preparation for Electrical Bonding
A M M 5 1 --- 8 0 --- 0 0 --- 7 6 0 --- 8 0 3 Electrical Bonding T est
S R M 5 1 --- 2 3 --- 0 0 Pressure, Environmental, Fuel T ank and Firewall
Sealing
T olerance Information
Linear T olerances Angular T olerance
X.XX in. (X.X mm) X.X in. (X mm)
+ / --- 0˚ 30”+/- - - 0.03 in. +/--- 0.1 in.
+ / --- 0 . 8 m m + / --- 3 m m
NOTE: The tolerances above apply to the dimensions given in this service
bulletin, except when specified differently.

### Page 7

SERVICE BULLETIN 601R- - -35- - -018
SB 601R- - - 35- - - 018
Page 7 of 14
May 21/2013
A. Job Set-Up
(1) Open the main avionics- - -compartment door.
WARNING: OBEY ALL THE OXYGEN SAFETY PRECAUTIONS WHEN YOU DO
WORK ON THE OXYGEN SYSTEM AND/OR AN OXYGEN SYSTEM
COMPONENT . IF YOU DO NOT DO THIS, YOU CAN CAUSE A FIRE OR
AN EXPLOSION.
(2) Obey all the oxygen safety precautions (Refer to AMM 35- - - 00- - - 00- - - 910- - - 001).
( 3 ) M a k es u r et h a tt h ep r e s s u r ei nt h eo x y g e nc y l i n d e ri sn o th i g h e rt h a nt h ef u l l
pressure for the given temperature (Refer to AMM 12- - - 16- - - 35- - - 614- - - 801).
(4) If the pressure is higher , decrease the pressure to the correct level as follows:
(a) Get access to a oxygen mask in the flight compartment.
(b) Push the PRESS TO TEST AND RESET control lever on the stowage
box, at the same time push the PRESS TO TEST flow control knob on
the mask regulator.
(c) Hold until the pressure in the oxygen bottle is to the correct level, and
release the control lever, and the flow control knob.
( d ) P u tt h eo x y g e nm a s ki nt h em a s ks t o w a g eb o x .
( 5 ) R e m o v ea n dd i s c a r dt h ew i t n e s sw i r ef r o mt h ev a l v eh a n d l eo ft h eo x y g e n
cylinder.
(6) Fully close the valve handle of the oxygen cylinder.
(7) Bleed the oxygen pressure from the supply lines as follows:
(a) Get access to a oxygen mask in the flight compartment.
(b) Push the PRESS TO TEST AND RESET control lever on the stowage
box, at the same time push the PRESS TO TEST flow control knob on
the mask regulator.
(c) Hold until the oxygen flow stops, and release the control lever, and the
flow control knob.
( d ) P u tt h eo x y g e nm a s ki nt h em a s ks t o w a g eb o x .

### Page 8

SERVICE BULLETIN 601R- - -35- - -018
SB 601R- - - 35- - - 018
Page 8 of 14
May 21/2013
B. Procedure
Refer to Figure 1 .
(1) Remove and discard the flexible hose (1) as follows:
(a) Near stringer 23R, remove and discard the screw (2), the washer (3),
and the clamp (4) that hold the flexible hose (1) to the structure.
( b ) D i s c o n n e c tt h ef l e x i b l eh o s e( 1 )f r o mt h eo x y g e nc y l i n d e ra n df r o mt h e
o x y g e n --- o v e r p r e s s u r e d i s c h a r g e --- i n d i c a t o r.
( c ) D i s c a r dt h ef l e x i b l eh o s e( 1 ) .
Refer to Figure 2 .
(2) Install the new flexible hose (1) as follows:
(a) Apply compound MIL- - - T - - - 5542 to the threads of the male fittings on the
oxygen cylinder and the oxygen- - -overpressure discharge- - -indicator
(Refer to AMM 20- - - 22- - - 01- - - 910- - - 801).
(b) Loosely connect the 45 deg. fitting to the oxygen cylinder.
NOTE: The fitting will be torqued after the clamps are installed.
(c) Loosely connect the 90 deg. fitting to the oxygen- - -overpressure
discharge- - -indicator .
NOTE: The fitting will be torqued after the clamps are installed.
(d) Put the clamp (4) on the flexible hose (1).
(e) Near stringer 23R, attach the clamp (4) to the structure with the screw
(12) and the washer (13).
(f) Put the clamp (11) on the bare metal area of the 45 deg. fitting of the
flexible hose (1) (Refer to AMM 51- - - 80- - - 00- - - 400- - - 803).
(g) Attach the bonding jumper (5) to the clamp (11) with the screw (6), the
washers (8), the washer (9), and the nut (7).
(h) On the post at BL20.0, prepare the surface around the attachment hole
for electrical bonding (Refer to AMM 51- - - 80- - - 00- - - 100- - - 802).

### Page 9

SERVICE BULLETIN 601R- - -35- - -018
SB 601R- - - 35- - - 018
Page 9 of 14
May 21/2013
(i) Attach the bonding jumper (5) to the post at BL20.0 with the screw (6)
the washers (8), the washer (9), and the nut (7).
(j) Do a check of the resistance of the ground connection
(Refer to AMM 51- - - 80- - - 00- - - 760- - - 803).
(k) Put the clamp (10) on the bonding jumper (5).
(l) Put the clamp (4) on the flexible hose (1).
(m) Attach the clamp (10) to the clamp (4) with the screw (6), the washers
(8), the washer (9), and the nut (7).
(n) Make sure there is a minimum clearance of 0.5 in. (12.7 mm) between
the bonding jumper (5) and the post at BL20.0.
(o) If the clearance is less than 0.5 in. (12.7 mm), change the location of the
clamps (10) and/or (4) to get the minimum clearance.
(p) With a brush, apply a layer of sealing compound on all sides of the
screws (6) and nuts (7) that attach the bonding jumper (5) to the post at
BL20.0 and the clamp (11) (Refer to SRM 51- - - 23- - - 00).
(q) T orque the 45 deg fitting to 70 to 120 lbf Sin. (7.91 to 13.56 N Sm)
(Refer to AMM 20- - - 21- - - 00- - - 910- - - 802).
(r) T orque the 90 deg fitting to 70 to 120 lbf Sin. (7.91 to 13.56 N Sm)
(Refer to AMM 20- - - 21- - - 00- - - 910- - - 802).

### Page 10 (OCR)

SERVICE BULLETIN 601R-35-018
LEGEND
1. Flexible hose
38026-4-0280-000 (Pre-mod).
2. Screw.
3. Washer.
4. Clamp.
OXYGEN-
OVERPRESSURE
DISCHARGE-
INDICATOR (REF)
OXYGEN
CYLINDER
(REF)
2
3
B  STR20
FS319.70
STR23  rsb601r35018_001.dg, cr, 05/12/12
FS333.00
PRE-MOD
Removal of the Flexible Hose
Figure 1
May 21/2013  SB 601R-35-018
Page 10 of 14

### Page 11

SERVICE BULLETIN 601R- - -35- - -018
SB 601R- - - 35- - - 018
Page 11 of 14
May 21/2013
Installation of the Flexible Hose
Figure 2
OXYGEN- -OVERPRESSURE
DISCHARGE- -INDICATOR
(REF)
STGR 23R
POST- -MOD
FS319.00
FS333.00
OXYGEN
CYLILDER
(REF)
OXYGEN
CYLINDER
(REF)
rsb601r35018_002.dg, cr, 02- -may- -2013
8
79
5
10
6
8
88
6
9
7
8
6
11
1
4
9
7
13
12
4
8
45 DEG.
FITTING
(REF)
BL20.0
90 DEG.
FITTING
(REF)
LEGEND
1. Flexible hose
601R44045- -1 (Post- -mod).
4. Clamp MS21919WDG9.
5. Bonding jumper
MS25083- -2BB8.
6. Screw MS35207- -264.
7. Nut MS21042L3.
8. Washer NAS620A10L.
9. Washer MS35338- -43.
10. Clamp MS21919WDG3.
11. Clamp AN735C4.
12. Screw NAS1801- -3- -8.
13. Washer AN960JD10L.
POST (REF)

### Page 12

SERVICE BULLETIN 601R- - -35- - -018
SB 601R- - - 35- - - 018
Page 12 of 14
May 21/2013
C. Job Close-Out
(1) Remove all tools, equipment, and unwanted materials from the work area.
(2) Fully open the valve handle of the oxygen cylinder.
(3) Safety the valve handle of the oxygen cylinder with the witness wire.
(4) Do an operational test of the crew oxygen system
(Refer to AMM 35- - - 10- - - 00- - - 710- - - 802).
(5) Close the main avionics-compartment door.
(6) When this service bulletin is completed, add the weight and balance data
shown in paragraph 1.I. of this service bulletin to the Weight and Balance
Manual. Under ‘Description of Change’ enter “ Service Bulletin
601R- - - 35- - - 018, incorporated.”
(7) When this service bulletin is completed, make this entry in the applicable
logbooks: “Service Bulletin 601R- - - 35- - - 018, Oxygen - - - Supply System - - -
Replacement of the Oxygen Discharge- - -Hose, incorporated.”

### Page 13

SERVICE BULLETIN 601R- - -35- - -018
SB 601R- - - 35- - - 018
Page 13 of 14
May 21/2013
3. MATERIAL INFORMATION
A. Kit Information
Kit Contents:
KIT 601R35 - - -018K1¡
PART NUMBER QUANTITY NAME ALTERNATEPARTS NOTES
601R44045- - - 1 1 Hose assembly
AN735C4 1 Clamp
AN960JD10L 2 Washer
MS21042L3 3 Nut
MS21919WDG- - - 3 1 Clamp
MS21919WDG- - - 9 2 Clamp
MS25083- - - 2BB8 1 Jumper assembly
MS35207- - - 264 3 Screw
MS35338- - - 43 4 Washer
NAS1801- - - 3- - - 8 1 Screw
NAS620A10L 9 Washer
¡ The kit can contain more hardware and/or material than necessary.
B. Consumable Information
The materials that follow are necessary to do this service bulletin. Y ou can order
them from Bombardier or purchased 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 QTY NAME REFERENCE
MIL- - - T - - - 5542 As
necessary
Thread compound N/A

### Page 14

SERVICE BULLETIN 601R- - -35- - -018
SB 601R- - - 35- - - 018
Page 14 of 14
May 21/2013
SPECIFICATION REFERENCE NAMEQTY
MIL- - - PRF- - - 81733
Typ e II
As
necessary
Compound, sealing
and coating,
corrosion inhibitive
09- - - 009¡
MS20995CY20
Q Q --- W --- 1 4 3
As
necessary
Lockwire (witness
wire), copper, 0.020
in. (0.51mm)
05- - - 102¡
¡ R e f e r t o A M M 5 1 --- 3 1 --- 0 0 --- 9 9 0 --- 8 0 1
NOTE: T o complete this list of consumables, refer to the different tasks that are
given as references in this service bulletin
C. Special T ools and Equipment
For a list of special tools and equipment, refer to the different tasks that are given
as references in this service bulletin.
D. Disposition of Parts
The table that follows shows the disposition of parts on the aircraft (or spares), and
the relationship between these parts to the new parts to be installed through the
incorporation of this service bulletin.
PRE-SB
PART NUMBER
NAME QTY DC POST-SB
PART NUMBER
NAME
38026- - - 4- - - 0280- - - 000
Oxygen
Hose
Assembly
1 DIS 601R44045- - - 1 HoseAssembly
Disposition code (DC):
DIS: Discard Part.
1

### Page 15

THANK 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 EVALUATION 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: 
     
 Illustration(s), figure(s), picture(s) and/or 
kit drawing(s) were helpful to carry out 
instructions. 
 Comments: 
     
 If a parts kit was required, did the kit 
contents received agree with the 
contents listed in the bulletin? 
 Comments: 
 
     
 Aircraft hands-on work was 
accomplished in estimated time. 
      Comments: 
     
 Overall, I was satisfied with this Service 
Bulletin. 
 Comments: 
     
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

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