# MHI RJ Service Bulletin 601R-35-022

Copy: Revision B ("601R-35-022B"), 45 pages: PDF https://openairdocs.org/files/sha256/e5/43/e543292983686963e4fe54d0fc9e67898770fa10f6d5bfbb8525b6679221fa72; text https://openairdocs.org/service-documents/bombardier/601r-35-022/file/e54329298368.md. Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2022-0141; AD 2022-26-04 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.

## Details

- Manufacturer: [Bombardier](https://openairdocs.org/service-documents/bombardier.md) (issued as MHI RJ)
- Type: Service bulletin (Service Bulletin)
- Number: 601R-35-022
- Latest revision known: 601R-35-022, Revision B, dated April 21, 2022 (OpenAirDocs)
- Page: https://openairdocs.org/service-documents/bombardier/601r-35-022

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

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

- [AD 2022-26-04](https://openairdocs.org/ad/2022-26-04.md), effective Feb 2, 2023: Revisions A and B

Also cited in [1 proposed AD](https://openairdocs.org/service-documents/bombardier/601r-35-022/proposed.md).

## Text (45 pages)

Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2022-0141; AD 2022-26-04 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. Each page's text from the PDF; open the PDF at a page with #page=N.

### Page 1

SB 601R−35−022
Page 1 of 2
Apr 21/2022
SERVICE BULLETIN
REVISION TRANSMITTAL SHEET
SERVICE BULLETIN 601R−35−022
SUBJECT:  Oxygen − General − Inspection and Modification of the 3rd Crew Member
Oxygen Mask Stowage Box Compartment Lamp Harness
These pages transmit:
Revision B of Service Bulletin 601R−35−022, dated Apr 21/2022
For aircraft that have had this service bulletin incorporated, it is
necessary to do PART B of this service bulletin.
Reason:
Revised Planning Information, paragraph 1., to:
Remove aircraft serial number 8048 from the Effectivity section.
Add effectivity flags in Description section.
Add steps in PART A of the Description section.
Add PART B in the Description and Manpower section.
Add PART A and PART B with specification about initial issue date in the Compliance
section.
Change the revision level of two reference documents in the References section.
Add a bracket to the Relationship Chart table in the Relationship Chart section.
Revised Accomplishment Instructions, paragraph 2., to:
Add an effectivity flag for Part A.
Add two AMM and SRM tasks in the Reference Information table of Part A.
Add steps for the inspection of the flexible lamp assembly installation.
Add steps to trim the bracket.
Change the note about the flexible lamp DS6LD.
Add alternative sleeve part number in a note.
Change the reference from figure 2 to figure 4 for the installation of contact pins and
cap housing J1LD.
Add a clearance check between bracket and harness.
Change the item number of the Doubler from 7 to 9 on Figure 3 (Sheet 4 of 4).
Add illustrations 5 and 6.
Add Part B.

### Page 2

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 2 of 2
Apr 21/2022
Revised Material Information, paragraph 3., to:
Remove the Note that asks to refer to notes 3 and 4 in the kit content table from the
Kit Information section.
Remove harness assembly KCM601R41056−5 and note 5 from kit 601R35−022K1 in
the Kit Information section.
NOTE: Existing harness assembly 3867016−503 is modified and re−identified
as harness assembly KCM601R41056−5 therefore, a revision to the kit
is not required.
Add sleeve S10155E10 to the consumable table in the Consumable Information
section.
This revision also includes small editorial changes that do not have an effect on the technical
content.
Instructions:  
Discard the copy of Service Bulletin 601R−35−022, Revision A, dated Oct 12/2021.
Replace with the copy attached.
Service Bulletin History:  
Initial issue, dated Jun 01/ 2021
Revision A, dated Oct 12/2021
1

### Page 3

SB 601R−35−022
Page 1 of 43
Jun 01/2021
Revision B, Apr 21/2022
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 MHIRJ 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: 35−00 NUMBER: 601R−35−022
SUBJECT:  Oxygen − General − Inspection and Modification of the 3rd Crew Member
Oxygen Mask Stowage Box Compartment Lamp Harness
1. PLANNING INFORMATION
A. Effectivity
(1) Aircraft Affected:
Service Bulletin: CL−600−2B19 aircraft serial numbers that follow:
7003 thru 7067, 7069 thru 7074, 7076 thru 7098, 7100 thru
7135, 7137 thru 7139, 7141 thru 7151, 7153 thru 7175, 7177
thru 7350, 7352 thru 7990, 8000 thru 8042, 8044 thru 8047,
8049, 8050, 8058, 8059, 8061, 8062 and 8064.
Production: There is no production effectivity at this time.
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 MHIRJ 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.

### Page 4

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 2 of 43
Jun 01/2021
Revision B, Apr 21/2022
B. Reason
(1) Condition
A 115 VAC flexible lamp is installed around the front panel of the third crew
member’s oxygen mask.  It is possible for the electrical harness to have a
chafing condition with an adjacent metallic bracket.
(2) Evidence
The harness of the 115 VAC flexible lamp installed around the front panel of
the third crew member’s oxygen mask was found damaged on service
aircraft.
(3) Objective/Benefit
This service bulletin gives the instructions to prevent chaffing on the third crew
member’s oxygen mask supply hose, and to reroute the oxygen mask flexible
lamp harness outside the oxygen mask compartment.
C. Description
This service bulletin is divided into two parts: PART A and PART B.
For Aircraft that have not incorporated a previous revision of this service bulletin
PART A − Inspection and Modification
The entrance/wardrobe is removed. The third crew member’s oxygen stowage box
is removed.  A one time inspection of various components in the oxygen mask
stowage box compartment is done. The oxygen mask flexible lamp harness is
modified and rerouted to prevent possible chaffing due to interference with items in
the oxygen stowage box compartment. The inspection of the flexible lamp is done.
The bracket is trimmed and reidentified. RTV sealant is applied to the head of the
six bolts located within the stowage box compartment. The entrance/wardrobe is
installed.
For Aircraft that have incorporated revision NC or A of this service bulletin
PART B − Bracket Modification
The third crew member’s oxygen stowage box is removed. The inspection of the
flexible lamp is done. The inspection of the wire harness is done. The bracket is
trimmed and reidentified. The third crew member’s oxygen stowage box is
installed.

### Page 5

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 3 of 43
Jun 01/2021
Revision B, Apr 21/2022
For all Aircraft
D. Compliance
Recommended service bulletin.
PART A and PART B
MHIRJ recommends that this service bulletin be done at no more than 6300 flight
hours or no later than 48 months from the initial issue date on the service bulletin,
whichever comes first, unless otherwise directed by the airworthiness authority of
the operator.
NOTE: If it is not possible to complete all the instructions in this service bulletin
because of the configuration of the aircraft, speak with a representative
of MHIRJ in the CRC at 450−990−7CRC (450−990−7272) direct,
1−833−990−7CRC (1−833−990−7272) toll free for North America or
+1−450−990−7CRC (+1−450−990−7272) for international callers or
e-mail at thd.crj@MHIRJ.com for analysis and to get an approved
disposition to complete this service bulletin.
NOTE: Service Bulletin 601R−35−017, Replacement of the Oxygen Hose of the
Third Crew Person, is a prerequisite to this service bulletin.
This service bulletin does not affect Airworthiness Limitations (AWLs) or Damage
Tolerance 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 #20−Q−01.
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.

### Page 6

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 4 of 43
Jun 01/2021
Revision B, Apr 21/2022
−All other activities that are not considered by MHIRJ as directly related to the
accomplishment of this procedure.
NOTE: For on-site labor assistance, please speak with a Fleet Services
representative for an estimate. Call the Fleet Services Team through the
CRC at 450−990−7CRC (450−990−7272) direct, 1−833−990−7CRC
(1−833−990−7272) toll free for North America or +1−450−990−7CRC
(+1−450−990−7272) for international callers or e-mail at
thd.crj@MHIRJ.com.
FOR PART A
It will take an estimated 8.5 man-hours to complete PART A of this service bulletin.
The man-hours are divided in the table that follows (elapsed cure time is not
included in the man-hour summary):
TASK MAN-HOURS
(1)  Job Set-Up 2.0
(2)  Procedure 4.0
(3)  Test 0.5
(4)  Job Close-Out 2.0
NOTE: These estimates do not include the man-hours necessary to do Service
Bulletin 601R−35−017, which is a prerequisite to this service bulletin.
FOR PART B
It will take an estimated 2.0 man-hours to complete PART B of this service bulletin.
The man-hours are divided in the table that follows :
TASK MAN-HOURS
(1)  Job Set-Up 0.25
(2)  Procedure 1.00
(3)  Test 0.5
(4)  Job Close-Out 0.25

### Page 7

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 5 of 43
Jun 01/2021
Revision B, Apr 21/2022
G. Material − Price and Availability
(1) The kits in the tables that follow are available from MHIRJ.
NOTE: For a list of kit contents, refer to paragraph 3.A.
KIT NUMBER NAME
601R35−022K1 Replacement of the Third
Crew Member Oxygen Mask
Light Harness
(2) Please send a purchase order to the address below to schedule kit delivery:
MHI RJ Aviation ULC
Service Bulletin Kit Support Team
12655, boul. Henri−Fabre 
Mirabel, Québec
Canada  J7N 1E1
Phone: 450−990−7CRC (450−990−7272) direct, 
1−833−990−7CRC (1−833−990−7272) toll free for North America 
or +1−450−990−7CRC (+1−450−990−7272) for international callers.
e-mail: kits@MHIRJ.com
Please contact the Service Bulletin Kit Support Team at the address above for
terms and conditions.
H. Tooling − 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
Not changed.
J. Electrical Load Data
Not changed.
K. References
Refer to the SB Introduction document for definition or explanation of service
bulletin content.
Modification Summary CM601R18667, Revision C.
For MHIRJ reference only:
Restriction and/or Special Instruction (RSI) C−A312, Revision B.
PCA 7426

### Page 8

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 6 of 43
Jun 01/2021
Revision B, Apr 21/2022
L. Other Publications Affected
Aircraft Illustrated Parts Catalogue (AIPC)
M. Relationship Chart
PRE-SB
PART NUMBER NAME POST -SBPART NUMBER
3867016−503 Electrical Harness KCM601R41056−5
Refer to TABLE 1 Entrance/Wardrobe Refer to TABLE 1
4592045−3 Bracket KCM601R41056−2100

### Page 9

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 7 of 43
Jun 01/2021
Revision B, Apr 21/2022
2. ACCOMPLISHMENT INSTRUCTIONS
For Aircraft that have not incorporated a previous revision of this service bulletin
PART A − Inspection and Modification
Reference Information
REFERENCE DESIGNATION
AMM 20−60−13−930−801 Identification of Aircraft Parts and Assemblies
AMM 20−21−00−910−801 Torque Procedures for Threaded Fasteners
AMM 24−00−00−910−801 Electrical/Electronic Safety Precautions
AMM 25−24−01−000−801 Removal of the Wardrobe Unit
AMM 25−24−01−400−801 Installation of the Wardrobe Unit
AMM 33−13−00−710−801 Operation Test of the Miscellaneous Lighting
AMM 33−13−23−000−801 Removal of the Observer’s Oxygen Mask
Compartment Flexible Lamp
AMM 33−13−23−400−801 Installation of the Observer’s Oxygen Mask
Compartment Flexible Lamp
AMM 35−00−00−910−801 Oxygen Safety Precautions
AMM 35−11−15−400−801 Installation of the Crew Oxygen Mask Stowage
Box
ESPM 20−10−00 Wire Identification − Maintenance Practices
ESPM 20−11−00 Wire Stripping and Wire/Cable Damage Repair −
Maintenance Practices
ESPM 20−12−00 Wiring − Removal/Installation
ESPM 20−60−13 Identification of Aircraft Parts and Assemblies
ESPM 20−16−00 Crimp Wire Splicing − Removal/Installation
SRM 51−21−16 Finish Codes
SRM 51−22−00 Bonding and Attaching Parts with Adhesives
SRM 51−23−00 Pressure, Environmental, Fuel and Firewall Sealing

### Page 10

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 8 of 43
Jun 01/2021
Revision B, Apr 21/2022
REFERENCE DESIGNATION
SRM 51−24−36 Cutting of Sheet metal
SRM 51−26−00 Cleaning
A. Job Set-Up
NOTE: The steps in the Job Set-Up section of this service bulletin are
recommended steps. The steps give a recommendation to get access
to the work area. This recommendation is to give a safe work area and
to minimize possible damage to surrounding aircraft parts. Alternative
steps can be used at the operator discretion.
(1) Obey all the electrical/electronic safety precautions (refer
to AMM 24−00−00−910−801).
(2) Obey all the oxygen safety precautions (refer to AMM 35−00−00−910−801).
WARNING: DO NOT LET OIL, GREASE, OR OTHER PETROLEUM PRODUCTS GET
ON YOUR HANDS, CLOTHING, OR THE EQUIPMENT USED TO DO
WORK ON THE OXYGEN SYSTEM.  OXYGEN CAN CAUSE
SPONTANEOUS IGNITION OF PETROLEUM PRODUCTS.  THIS COULD
CAUSE DAMAGE TO EQUIPMENT AND INJURY TO PERSONS.
(3) Make sure that the work area is clean and that any tools or equipment have
no oil, grease, or other petroleum based lubricant on them when you work on
or near any breathing oxygen equipment.
(4) Disconnect and move the entrance/wardrobe to get access to the rear of the
monument itself (refer to AMM 25−24−01−000−801).
(5) Make sure that service bulletin 601R−35−017 is incorporated as a
prerequisite on the entrance compartment.
(a) Make sure that there is a doubler (9) installed in the lower bottom AFT of
observers oxygen stowage box compartment as shown in Figures 2 and
3, View E.
1 If this doubler is not installed, then it must be installed in
accordance with 601R−35−017 and C&D VSB 4591001−25−07,
or 4592001−25−07, or 4593001−25−02, or 4594001−25−02, or
A281001−25−01, or A282001−25−01, or A283001−25−02 or
A284001−25−01 as applicable.

### Page 11

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 9 of 43
Jun 01/2021
Revision B, Apr 21/2022
B. Procedure
(1) If it is not possible to complete all the instructions in this service bulletin
because of the configuration of the aircraft, speak with a representative of
MHIRJ in the CRC at 450−990−7CRC (450−990−7272) direct,
1−833−990−7CRC (1−833−990−7272) toll free for North America or
+1−450−990−7CRC (+1−450−990−7272) for international callers or e-mail
at thd.crj@MHIRJ.com for analysis and to get an approved disposition to
complete this service bulletin.
WARNING: DO NOT PULL ON THE OXYGEN HOSE OR LET THE OXYGEN MASK
STOWAGE−BOX HANG FROM IT AS THIS CAN CAUSE DAMAGE TO
THE OXYGEN HOSE
WARNING: MAKE SURE THAT YOU DO NOT BIND OR OVERSTRETCH THE
OXYGEN HOSE WHEN YOU REMOVE THE STOWAGE BOX. THIS CAN
CAUSE INJURY TO PERSONS AND/OR DAMAGE TO THE EQUIPMENT .
Refer to Figure 1
(2) Do an inspection of the observers oxygen mask/stowage compartment,
oxygen hose connections, hose routing and the electrical harness as follows:
NOTE: The removal of some insulation may be necessary.
(a) Make sure that the oxygen solid line connection at the flex hose 90
degree elbow connector (2) clocking is positioned full inboard towards
the oxygen mask stowage box (3).
1 If the clocking is not fully inboard towards the oxygen mask
stowage box (normally installed), the clocking must be corrected
as follows:
a At STRG6L, connect the oxygen hose (1) to the end of the
oxygen line. Make sure that the clocking of the elbow (2) is at
180 degrees as shown in figure 1, view C.
b Torque the oxygen hose elbow (2) at STRG6L (Refer to AMM
20−21−00−910−802).
NOTE: The 90 degree elbow should be in line with the opening
and as straight as possible, also make sure that the
hose is not twisted and all the bends have a minimum
bend radius of 1.0 inch (25.4 mm).

### Page 12

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 10 of 43
Jun 01/2021
Revision B, Apr 21/2022
(b) Make sure that there is no visible surface damage to the oxygen flexible
hose along the entire length. Move your fingers along the entire length of
the hose outer material to make sure that it is smooth and that there is
no irregularity.
(c) Make sure that there is no Teflon sealing tape (or other tape) installed
between the oxygen stowage box union flared fitting and the oxygen flex
line flared B−nut (refer to view B−B).
NOTE: Tape is only allowed on the pipe threads of the union fitting to
Stowage box fitting (refer to AMM 35−11−15−400−801).
1 If tape is installed, remove the oxygen flexible line flared B−nut.
Remove all traces of tape from both the flexible line flared B−nut
and the union fitting installed on the oxygen stowage box fitting.
(d) Make sure that there is no damage to the wire (4) connected to the
oxygen mask stowage box connector 3P10RH.
NOTE: This damage can include cuts, nicks, insulation damage and/or
kinks.
1 If damage is found, then repair the damage (refer to ESPM
20−11−00).
(e) Make sure that there is no twisting/deformation of the oxygen flex line for
the full length of the line from end to end.
(3) Refer to TABLE 1 below to identify the entrance/wardrobe monument part
number in the aircraft. Make sure that the identification plate on
entrance/wardrobe monument contains a pre−mod part number from the list
in TABLE 1. Take note if the entrance/wardrobe is a −1 or a −3 configuration.
NOTE: The procedures and illustrations will be split per configuration.
TABLE 1
Pre−Mod
Part Number
Modification Kit
Configuration
Post−Mod
Part Number
4591001C103 −1 KCM601R41056C2001
4591001N103 −1 KCM601R41056N2001
4591001C105 −1 KCM601R41056C2002
4591001N109 −1 KCM601R41056C2003

### Page 13

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 11 of 43
Jun 01/2021
Revision B, Apr 21/2022
4591001C111 −1 KCM601R41056N2004
4591001C115 −1 KCM601R41056C2005
4591001N115 −1 KCM601R41056N2005
4591001C117 −1 KCM601R41056C2006
4591001N121 −1 KCM601R41056N2007
4591001N123 −1 KCM601R41056N2008
4591001N125 −1 KCM601R41056N2009
4591001−127 −1 KCM601R41056−2010
4591001V131 −1 KCM601R41056V2011
4591001N149 −1 KCM601R41056N2012
4591001N153 −1 KCM601R41056N2013
4591001N157 −1 KCM601R41056N2014
4591001N159 −1 KCM601R41056N2015
4591001N161 −1 KCM601R41056N2016
4592001A101 −3 KCM601R41056A2017
4592001H107 −3 KCM601R41056H2018
4592001P107 −3 KCM601R41056P2018
4592001V107 −3 KCM601R41056V2018
4592001−111 −3 KCM601R41056−2019
4592001B113 −3 KCM601R41056B2020
4592001K115 −3 KCM601R41056K2021
4592001N117 −3 KCM601R41056N2021
4592001B119 −3 KCM601R41056P2022
4592001P121 −3 KCM601R41056P2023
4592001V121 −3 KCM601R41056V2023
4592001−125 −3 KCM601R41056−2024
4592001K129 −3 KCM601R41056K2025
4592001B133 −3 KCM601R41056B2026

### Page 14

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 12 of 43
Jun 01/2021
Revision B, Apr 21/2022
4592001K153 −3 KCM601R41056K2027
4592001B155 −3 KCM601R41056B2028
4592001N159 −3 KCM601R41056N2029
4593001AK101 −1 KCM601R41056AK2030
4593001AT101 −1 KCM601R41056AT2030
4593001N103 −1 KCM601R41056N2031
4593001N105 −1 KCM601R41056N2032
4593001AV107 −1 KCM601R41056AV2033
4593001N107 −1 KCM601R41056N2033
4593001N109 −1 KCM601R41056N2034
4593001AT111 −1 KCM601R41056AT2035
4593001N113 −1 KCM601R41056N2036
4594001AR101 −3 KCM601R41056AR2037
4594001−103 −3 KCM601R41056−2038
4594001AR103 −3 KCM601R41056AR2038
A281001AT101 −1 KCM601R41056AT2039
A281001N103 −1 KCM601R41056N2040
A281001AT105 −1 KCM601R41056AT2041
A281001C107 −1 KCM601R41056C2042
A281001N109 −1 KCM601R41056N2043
A281001N111 −1 KCM601R41056N2044
A281001N115 −1 KCM601R41056N2045
A281001N119 −1 KCM601R41056N2046
A281001BC125 −1 KCM601R41056BC2047
A282001B101 −3 KCM601R41056B2048
A283001AT105 −1 KCM601R41056AT2049
A283001BF127 −1 KCM601R41056BF2050
A283001N111 −1 KCM601R41056N2051

### Page 15

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 13 of 43
Jun 01/2021
Revision B, Apr 21/2022
A283001N119 −1 KCM601R41056N2052
A283001BC125 −1 KCM601R41056BC2053
A283001BJ131 −1 KCM601R41056BJ2054
For kit Modification Installation Configuration −1
Refer to Figure 2, View E
(a) Make sure that the monument mounting plate (7) installed on the aft wall
of the oxygen mask compartment has the six bolts (8) installed with the
bolt heads on the inside the oxygen mask compartment.
1 If the nuts and washers that secure the monument mounting plate
(7) are installed on inside of the oxygen mask compartment, then
they must be removed and installed on the outside monument
mounting plate (7). (refer to 601R−35−017 and C&D VSB
4591001−25−07 or 4593001−25−02 or A281001−25−01 or
A283001−25−02 or A284001−25−01).
2 Apply sealant to the six bolt heads (8).  Make sure that all sides
and the top of the bolts (8) are fully covered and smooth (refer to
SRM 51−23−00).
NOTE: Apply RTV 108 sealant (or equivalent).
Refer to Figure 2, View C−C
(4) Drill a 0.375 inch (9.53 mm) hole in the top of the entrance/wardrobe
compartment panel to the dimensions shown.
Refer to Figure 2, View B−B
(5) Bond the two grommets (2) in the hole (one from the top and one from the
bottom) of the entrance/wardrobe compartment panel (refer to SRM
51−22−00).
NOTE: Bond the grommets with DP110 (3M).

### Page 16

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 14 of 43
Jun 01/2021
Revision B, Apr 21/2022
Refer to Figure 6
(6) Do an inspection of the installation of the flexible lamp assembly (1) as
follows:
(a) Make sure that the end of the flexible lamp (1) with the electrical wire is
installed on the lower face of the upper panel of the oxygen box
compartment (Point A).
(b) Make sure that the end of the flexible lamp (1) without the electrical wire
is installed on the aft face of the forward panel of the oxygen box
compartment (Point B).
(c) If the installation of the flexible lamp (1) is not correct, the installation
must be corrected as follows:
1 Remove the flexible lamp assembly (1) 
(refer to AMM 33−13−23−000−801).
2 Install the flexible lamp assembly (1) 
(refer to AMM 33−13−23−400−801).
Refer to Figure 5
(7) Trim the bracket (4) as follows:
(a) Trim the bracket (4) to have a distance of 0.500 to 0.600 inch 
(12.70 to 15.20 mm) between the bracket edge and the lower face of the
upper panel of the oxygen box compartment.
(b) Make sure that the distance between the bracket (4) and the lower face
of the upper panel of the oxygen box compartment is 0.500 to 0.600 inch
(12.70 to 15.20 mm).
(c) Touch−up the reworked area on bracket (4) with finish code A046 
(refer to SRM 51−21−16).
(d) Re−identify the bracket (4) as KCM601R41056−2100 
(refer to AMM 20−60−13−930−801).
1 If it is not possible to re−identify the bracket (4), then make a label
of maximum 4.00 x 4.00 inch (100 x 100 mm).
2 Use ink marking method to identify the bracket (4) next to the
manufacturer identification to a similar size of the original marking
(refer to AMM 20−60−13−930−801).

### Page 17

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 15 of 43
Jun 01/2021
Revision B, Apr 21/2022
Refer to Figure 4.
(8) Rework the existing electrical harness 3867016−503 (1) as follows:
NOTE: Do not remove the flexible lamp assembly DS6LD (6) from the stowage
box.
(a) Remove and discard two cable ties (17) and the wire harness ID label
(5).
(b) Cut the harness and the existing sleeve (silrub) (1) to a new length of
7.00 inch (177.8 mm) from the light assembly as shown.
NOTE: An alternative sleeve S10155E10 can be use if the existing sleeve
(1) is found damage.
(c) Remove and discard the cap housing (18) with the pin contacts (19) and
the cut−off harness.
(d) Install the sleeve (silrub) (1) on the harness and secure with two cable
ties (17).
NOTE: An alternative sleeve S10155E10 can be use if the existing sleeve
(1) is found damage.
(e) Pass the harness (3) through the new hole in the top of the
entrance/wardrobe compartment panel.
(f) Identify the marker tag (16) as KCM601R41056−5 (refer to ESPM
20−10−00).
(g) Install marker tag (16) on the harness as close to the light assembly as
possible and secure with two cable ties (17).
NOTE: The post mod harness KCM601R41056−5 will be shown as item
(3) in figure 2.
(h) Install the receptacle (11) and socket contact (14) on one wire of
harness (3) (refer to ESPM 20−12−00 and 20−16−00).
(i) Install the connector (10) and pin contact (15) on the other wire of
harness (3) (refer to ESPM 20−12−00 and 20−16−00).

### Page 18

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 16 of 43
Jun 01/2021
Revision B, Apr 21/2022
(9) Assemble the harness KCM601R41056−7 as follows:
(a) Cut the sleeve (13) and the two wires (12) to a length of 21 inch (533.4
mm).
(b) Install the sleeve (13) on the two wires (12) and secure with two cable
ties (17).
(c) Identify the marker tag (16) as KCM601R41056−7, J1LD (refer to ESPM
20−10−00).
NOTE: The post mod harness KCM601R41056−7 will be shown as item
(6) in figure 2.
(d) Install marker tag (16) on the harness assembly and secure with two
cable ties (17).
(e) Install the receptacle (11) and socket contact (14) on one of the wires of
the harness (6) (refer to ESPM 20−12−00 and 20−16−00)  and refer to
the wiring diagram figure 4.
(f) Install the connector (10) and pin contact (15) on the other wire of the
harness (6) (refer to ESPM 20−12−00 and 20−16−00) and refer to the
wiring diagram figure 4.
(g) Connect the harness KCM601R41056−5 (3) to the harness
KCM601R41056−7 (6).
Refer to Figure 2
(10) Install the cable tie mounts (4) as follows:
(a) Clean the seven locations on the top of the entrance/wardrobe
compartment panel where the cable tie mounts (4) will be installed with
isopropyl alcohol as shown in view D−D (refer to SRM 51−26−00).
(b) Use epoxy adhesive DP420 (3M) to secure the seven cable tie mounts
(4) to the entrance/wardrobe compartment panel as per Notes 5, 6 and
7 (refer to SRM 51−22−00).
(c) Secure the harness assemblies (3) and (6) to the cable tie mounts (4)
with cable ties (5).

### Page 19

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 17 of 43
Jun 01/2021
Revision B, Apr 21/2022
(11) Make sure that the harness (6) does not extend more than 3.00 inch (76.2
mm) past the oxygen box stowage compartment as shown in View E.
Refer to Figure 4
(12) Install the two contact pins (19) and the cap housing J1LD (18).
Refer to Figure 5
(13) Make sure that there is no contact between the harness (2) and the bracket
(4).
For kit Modification Installation Configuration  −3
Refer to Figure 3, View C−C
(14) Drill a 0.375 inch (9.53 mm) hole in the top of the entrance/wardrobe
compartment panel to the dimensions shown.
Refer to Figure 3, View B−B
(15) Bond the two grommets (2) in the hole (one from the top and one from the
bottom) of the entrance/wardrobe compartment panel. and bond with DP110
(3M) (refer to SRM 51−22−00).
NOTE: Bond the grommets with DP110 (3M).
Refer to Figure 6
(16) Do an inspection of the installation of the flexible lamp assembly (1) as
follows:
(a) Make sure that the end of the flexible lamp (1) with the electrical wire is
installed on the lower face of the upper panel of the oxygen box
compartment (Point A).
(b) Make sure that the end of the flexible lamp (1) without the electrical wire
is installed on the aft face of the forward panel of the oxygen box
compartment (Point B).
(c) If the installation of the flexible lamp (1) is not correct, the installation
must be corrected as follows:
1 Remove the flexible lamp assembly (1) 
(refer to AMM 33−13−23−000−801).

### Page 20

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 18 of 43
Jun 01/2021
Revision B, Apr 21/2022
2 Install the flexible lamp assembly (1) 
(refer to AMM 33−13−23−400−801).
Refer to Figure 5
(17) Trim the bracket (4) as follows:
(a) Trim the bracket (4) to have a distance of 0.500 to 0.600 inch 
(12.70 to 15.20 mm) between the bracket edge and the lower face of the
upper panel of the oxygen box compartment (refer to SRM 51−24−36).
(b) Make sure that the distance between the bracket (4) and the lower face
of the upper panel of the oxygen box compartment is 0.500 to 0.600 inch
(12.70 to 15.20 mm).
(c) Touch−up the reworked area on bracket (4) with finish code A046 
(refer to SRM 51−21−16).
(d) Re−identify the bracket (4) as KCM601R41056−2100 
(refer to AMM 20−60−13−930−801).
1 If it is not possible to re−identify the bracket (4), then make a label
of maximum 4.00 x 4.00 inch (100 x 100 mm).
2 Use ink marking method to identify the bracket (4) next to the
manufacturer identification to a similar size of the original marking
(refer to AMM 20−60−13−930−801).
Refer to Figure 4.
(18) Rework the existing electrical harness 3867016−503 (1) as follows:
NOTE: Do not remove the flexible lamp assembly DS6LD (6) from the stowage
box.
(a) Remove and discard two cable ties (17) and the wire harness ID label
(5).
(b) Cut the harness and the existing sleeve (silrub) (1) to a new length of
7.00 inch (177.8 mm) from the light assembly as shown.
NOTE: An alternative sleeve S10155E10 can be use if the existing sleeve
(1) is found damage.
(c) Remove and discard the cap housing (18) with the pin contacts (19) and
the cut−off harness.

### Page 21

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 19 of 43
Jun 01/2021
Revision B, Apr 21/2022
(d) Install the sleeve (silrub) (1) on the harness and secure with two cable
ties (17).
NOTE: An alternative sleeve S10155E10 can be use if the existing sleeve
(1) is found damage.
(e) Pass the harness (3) through the new hole in the top of the
entrance/wardrobe compartment panel.
(f) Identify the marker tag (16) as KCM601R41056−5 (refer to ESPM
20−10−00).
(g) Install marker tag (16) on the harness as close to the light assembly as
possible and secure with two cable ties (17).
NOTE: The post mod harness KCM601R41056−5 will be shown as item
(3) in figure 3.
(h) Install the receptacle (11) and socket contact (14) on one wire of
harness (3) (refer to ESPM 20−12−00 and 20−16−00).
(i) Install the connector (10) and pin contact (15) on the other wire of
harness (3) (refer to ESPM 20−12−00 and 20−16−00).
(19) Assemble the harness KCM601R41056−9 as follows:
(a) Cut the sleeve (13) and the two wires (12) to a length of 17 inch (431.8
mm).
(b) Install the sleeve (13) on the two wires (12) and secure with two cable
ties (17).
(c) Identify the marker tag (16) as KCM601R41056−9, J1LD (refer to ESPM
20−10−00).
NOTE: The post mod harness KCM601R41056−9 will be shown as item
(6) in figure 3.
(d) Install marker tag (16) on the harness assembly and secure with two
cable ties (17).

### Page 22

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 20 of 43
Jun 01/2021
Revision B, Apr 21/2022
(e) Install the receptacle (11) and socket contact (14) on one of the wires of
the harness (6) (refer to ESPM 20−12−00 and 20−16−00) and refer to
the wiring diagram figure 4.
(f) Install the connector (10) and pin contact (15) on the other wire of the
harness (6) (refer to ESPM 20−12−00 and 20−16−00) and refer to the
wiring diagram figure 4.
(g) Connect the harness KCM601R41056−5 (3) to the harness
KCM601R41056−9 (6).
Refer to Figure 3
(20) Install the cable tie mounts (4) as follows:
(a) Clean the seven locations on the top of the entrance/wardrobe
compartment panel where the cable tie mounts (4) will be installed with
isopropyl alcohol as shown in view D−D (refer to SRM 51−26−00).
(b) Use epoxy adhesive DP420 (3M) to secure the seven cable tie mounts
(4) to the entrance/wardrobe compartment panel as per Notes 5, 6 and
7 (refer to SRM 51−22−00).
(c) Secure the harness assemblies (3) and (6) to the cable tie mounts (4)
with cable ties (5).
(21) Make sure that the harness (6) does not extend more than 3.00 inch (76.2
mm) past the oxygen box stowage compartment as shown in View E.
Refer to Figure 4
(22) Install the two contact pins (19) and the cap housing J1LD (18).
Refer to Figure 5
(23) Make sure that there is no contact between the harness (2) and the bracket
(4).

### Page 23

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 21 of 43
Jun 01/2021
Revision B, Apr 21/2022
For kit Modification Installation −1 and −3
(24) Re−identify the entrance/wardrobe as follows:
(a) Re−identify the entrance/wardrobe identification plate with the
post−mod part number from TABLE 1 (refer to AMM
20−60−13−930−801).
1 If it is not possible to re−identify entrance/wardrobe identification
plate, then make a 4.00 x 4.00 inch (100 x 100 mm) label.
2 Use ink marking method to identify the post−mod part number on
the label (refer to AMM 20−60−13).
3 Put the label on the entrance/wardrobe at a suitable location.
C. Job Close-Out
NOTE: The steps in the Job Close-Out section of this service bulletin, except for
the return-to-service tests, are recommended steps. The steps give a
recommendation to install components removed during the Job Set-Up.
This recommendation is to make sure that the aircraft is safe and ready
to return to service. Alternative steps can be used at the operator
discretion.
(1) Re−install the entrance/wardrobe (refer to AMM 25−24−01−400−801).
NOTE: Make sure that all fittings, hoses, harnesses, and connectors are free
from damage and are installed as per AMM tasks and that the oxygen
box faceplace is positioned in accordance with Figure 1, view E.
(2) Remove all tools, equipment, and unwanted materials from the work area.
(3) Do an operational test of the third crew oxygen mask light (refer to AMM
33−13−00−710−801).
(4) When PART A of this service bulletin is completed, make this entry in the
applicable logbooks: /quoteblleftService Bulletin 601R−35−022, Revision B, Oxygen −
General − Inspection and Modification of the 3rd Crew Member Oxygen Mask
Stowage Box Compartment Lamp Harness, PART A, incorporated."

### Page 24

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 22 of 43
Jun 01/2021
Revision B, Apr 21/2022
Inspection of the Oxygen Supply Line
Figure 1  (Sheet 1 of 3)
rsb601r35022_003.cgm, ps, may05/2021
B
A
B
3
3
1
2
STGR6L
FS283.43ENTRANCE
MONUMENT
OPENING
(REF)
STGR6L
2
2
1.00 in. (25.4 mm)
MINIMUM BEND
RADIUS
2
1 3
A
4
MODIFICATION KIT
INSTALLATION −1
C
−B
C
B
LEGEND
1. Oxygen hose.
2. Elbow.
3. Oxygen mask stowage−box.
NOTES
Refer to Table 1 for the entrance/wardrobe monument
Part Number that corresponds to Modification Kit
Configuration −1
The hose should not be bent
near the swage fittings.
180 degree elbow clocking.
Make sure that tape is only
installed on the pipe threads
of the fitting that goes into the
stowage box and not installed
on the cone/flared side of the B−nut
fitting where the oxygen hose attaches.
2
3
4
1.

### Page 25

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 23 of 43
Jun 01/2021
Revision B, Apr 21/2022
Inspection of the Oxygen Supply Line
Figure 1  (Sheet 2 of 3)
rsb601r35022_001.cgm, ps, gb, 17 −mai−2021
ENTRANCE
MONUMENT
OPENING
(REF)
STGR6L
2
2
1.00 in. (25.4 mm)
MINIMUM BEND
RADIUS
C
2
1 3
3
3
1
2
STGR6L
FS283.43
A
4
C
MODIFICATION KIT
INSTALLATION −3
−B B
B
A
BLEGEND
1. Oxygen hose.
2. Elbow.
3. Oxygen mask stowage−box.
NOTES
Refer to Table 1 for the entrance/wardrobe monument
Part Number that corresponds to Modification Kit
Configuration −3
The hose should not be bent
near the swage fitting.
180 degree elbow clocking.
Make sure that tape is only
installed on the pipe threads
of the fitting that goes into the
stowage box and not installed
on the cone/flared side of the B−nut
fitting where the oxygen hose attaches.
2
3
4
1.

### Page 26

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 24 of 43
Jun 01/2021
Revision B, Apr 21/2022
Inspection of the Oxygen Supply Line
Figure 1  (Sheet 3 of 3)
rsb601r35022_002.cgm, ps, gb, 17 −mai−2021
3
D
D
1
4
LEGEND
1. Oxygen hose.
3. Oxygen mask stowage−box.
4. Wire harness.
5. Oxygen box faceplate.
5

### Page 27

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 25 of 43
Jun 01/2021
Revision B, Apr 21/2022
Modification to the Oxygen Mask Compartment Light Electrical Harness
Figure 2 (Sheet 1 of 4)
rsb601r35022_005.cgm, ps/sk, apr11/2022
NOTE
Bond grommets to panel
using DP110 (3M).
1
PRE−MOD
VIEW LOOKING FORWARD
− BB
1
A
LEGEND
1. Harness 3867016−503.
2. Grommet NAS1368N4A.
POST−MOD
VIEW LOOKING FORWARD
− BB
2
3
1
21
A
INSTALLATION −1
B
B
3. Wire harness assembly 
     KCM601R41056−5.

### Page 28

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 26 of 43
Jun 01/2021
Revision B, Apr 21/2022
Modification to the Oxygen Mask Compartment Light Electrical Harness
Figure 2 (Sheet 2 of 4)
rsb601r35022_006.cgm, ps, may05/2021
A
INSTALLATION −1
0.400 in.
(10.16 mm)
1.200 in.
(30.48 mm)
1
3
NOTE
Drill thru hole of 0.375 in. (9.53 mm)
diameter and fill edge holes in honeycomb
panel as per pre−mod applicable CMM.
2
2
LEGEND
1. Harness 3867016−503.
3. Wire harness assembly
    KCM601R41056−5.
C
C
PRE−MOD
VIEW LOOKING UP
−
POST−MOD
VIEW LOOKING UP
CC
− CC

### Page 29

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 27 of 43
Jun 01/2021
Revision B, Apr 21/2022
Modification to the Oxygen Mask Compartment Light Electrical Harness
Figure 2 (Sheet 3 of 4)
rsb601r35022_007.cgm, ps, may05/2021
4
5
3
6
0.050 in.
(1.27 mm)
0.400 in.
(10.16 mm)
NOTES
Clean surface with isopropyl alcohol as per SRM 51−23−00 pri or
to installation of cable tie mounts. Bond cable tie mounts to
surface as per procedure described in SRM 51−22−00 using
DP420 (3M) epoxy adhesive in accordance with
manufacturer instructions.
Cable tie mount (4) to be installed in contact with bracket.4
3
3
4
4
LEGEND
3. Wire harness assembly
    KCM601R41056−5.
4. Cable tie mount without adhesive
    B0816032−001.
5. Cable tie MS3367−5−9.
6. Wire harness assembly
    KCM601R41056−7.
A
INSTALLATION −1
POST−MOD
VIEW LOOKING DOWN
−
D
D
DD

### Page 30

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 28 of 43
Jun 01/2021
Revision B, Apr 21/2022
Modification to the Oxygen Mask Compartment Light Electrical Harness
Figure 2 (Sheet 4 of 4)
rsb601r35022_008.cgm, ps, gb, 26 −juin−2021
9 9
A
INSTALLATION −1
NOTES
Cable tie mount (4) to be installed as close as possible
from the vertical panel.
Cable tie mount (4) to be installed as close as possible
from the edge of the panel.
Cable tie mount (4) to be installed as close as possible
from the edge of the doubler end at the limit of the
doubler radius.
Apply sealant on the 6 heads of bolts as per
SRM 51−23−00 (brush sealing of fasteners−pressure &
environmental sealing).
Doubler installed by C&D Zodiac
SB : A281001−25−01, A283001−25−02,
A284001−25−01, 4591001−25−07 or 4593001−25−02.
3.000 in.
(76.20 mm)
MAXIMUM
5
5 6
7
6
8
7
8
6
5
7
8
HARDWARE INSTALLED
INCORRECTLY
POST−MOD
AIRCRAFT STRUCTURE
NOT SHOWN FOR CLARITY
E
LEGEND
7. Monument
    mounting plate.
8. Bolt.
9. Doubler.
9
E

### Page 31

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 29 of 43
Jun 01/2021
Revision B, Apr 21/2022
Modification to the Oxygen Mask Compartment Light Electrical Harness
FIgure 3 (Sheet 1 of 4)
rsb601r35022_009.cgm, ps/sk, apr11/2022
A
LEGEND
1. Harness 3867016−503.
2. Grommet NAS1368N4A.
NOTE
Bond grommets to panel
using DP110 (3M).
1
A
INSTALLATION −3
B
B
POST−MOD
VIEW LOOKING FORWARD
PRE−MOD
VIEW LOOKING FORWARD
− BB − BB
1
3
2 1
21
3. Wire harness assembly
     KCM601R41056−5.

### Page 32

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 30 of 43
Jun 01/2021
Revision B, Apr 21/2022
Modification to the Oxygen Mask Compartment Light Electrical Harness
Figure 3 (Sheet 2 of 4)
rsb601r35022_010.cgm, ps, apr28/2021
0.400 in.
(10.16 mm)
1.800 in.
(45.72 mm)
1
PRE−MOD
VIEW LOOKING UP
−
POST−MOD
VIEW LOOKING UP
3
NOTE
Drill thru hole of 0.375 in. (9.53 mm)
diameter and fill edge holes in honeycomb
panel as per pre−mod applicable CMM.
2
2LEGEND
1. Harness 3867016−503.
3. Wire harness assembly
    KCM601R41056−5.
C
C
CC
− CC
A
INSTALLATION −3

### Page 33

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 31 of 43
Jun 01/2021
Revision B, Apr 21/2022
Modification to the Oxygen Mask Compartment Light Electrical Harness
Figure 3 (Sheet 3 of 4)
rsb601r35022_011.cgm, ps, may05/2021
NOTES
Clean surface with isopropyl alcohol as per SRM 51−23−00 pri or
to installation of cable tie mounts. Bond cable tie mounts to
surface as per procedure described in SRM 51−22−00 using
DP420 (3M) epoxy adhesive in accordance with
manufacturer instructions.
Cable tie mount (4) to be installed in contact with bracket.4
3
LEGEND
3. Wire harness assembly
    KCM601R41056−5.
4. Cable tie mount without adhesive
    B0816032−001.
5. Cable tie MS3367−5−9.
6. Wire harness assembly
    KCM601R41056−9.
POST−MOD
VIEW LOOKING DOWN
−
A
INSTALLATION −3
4
5 3
4
5 3
4
3
6
0.500 in.
(12.70 mm)
0.100 in.
(2.54 mm)
D
D
DD

### Page 34

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 32 of 43
Jun 01/2021
Revision B, Apr 21/2022
Modification to the Oxygen Mask Compartment Light Electrical Harness
Figure 3 (Sheet 4 of 4)
rsb601r35022_012.cgm, ps, may12/2021
NOTES
Cable tie mount (4) to be installed as close as possible
from the vertical panel.
Cable tie mount (4) to be installed as close as possible
from the edge of the panel.
Cable tie mount (4) to be installed in contact with
the doubler.
Doubler installed by C&D Zodiac
SB : A281001−25−01, A283001−25−02,
A284001−25−01, 4591001−25−07 or 4593001−25−02.
POST−MOD
AIRCRAFT STRUCTURE
NOT SHOWN FOR CLARITY
7
6
5
A
INSTALLATION −3
E
E
3.000 in.
(76.20 mm)
MAXIMUM
1.600 in.
(40.64 mm)
5
6 7
6
9
88
8
LEGEND
9. Doubler

### Page 35

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 33 of 43
Jun 01/2021
Revision B, Apr 21/2022
Harness Modification
Figure 4 (Sheet 1 of 2)
rsb601r35022_013.cgm, ps/sk, apr11/2022
WIRING DIAGRAM FOR
KCM601R41056 −5, −7, −9 ASSEMBLY
POST−MOD
18
19 (2 LOCATIONS)
1
17 (2 LOCATIONS)
5
1
12
17 (2 LOCATIONS)
1
63
3867016−503 ASSEMBLY
PRE−MOD
LEGEND
  1. Silrub HA1NAN09.
  5. Wire harness ID label
      CDEL005−”3867016−503””REV.__ ____”.
  6. Flexible lamp assembly 36491−5.
17. Cable tie MS3367−4−9.
18. Cap housing 1−480699−0.
19. Contact pin 350690−7.
NOTES
Remove and discard.
Remove and retain.
Do not remove from monument.
1
2
3
(REF)

### Page 36

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 34 of 43
Jun 01/2021
Revision B, Apr 21/2022
Harness Modification
Figure 4 (Sheet 2 of 2)
rsb601r35022_014.cgm, ps/sk, apr11/2022
18
19 (2 LOCATIONS)
17
(2 LOCATIONS)
16
17 (2 LOCATIONS) 13
12 1510
11
14
21.00 in. (533.4 mm)
KCM601R41056−717.00 in. (431.8 mm)
KCM601R41056−9
10
15
14
11
5
7
8
17
(2 LOCATIONS)
16
17 (2 LOCATIONS)
5 LIGHT
(REF)
6
KCM601R41056 −5, −7, −9 ASSEMBLY
POST−MOD
LEGEND
10. Connector 48−7190.
11. Receptacle 48−7191.
12. Wire AWG22
      M22759/34−22−9.
13. Sleeve expanded
      Grade 686 DM 1/8”.
14. Socket contact
      M39029/32−248.
15. Pin contact
      M39029/31−229.
16. Marker tag
      CM−SCE−TP−1/4−4H−9.
17. Cable tie MS3367−4−9.
18. Cap housing 1−480699−0.
19. Contact pin 350690−7.
NOTES
Marker tag to be identified as per
ESPM 20−10−00 ”Wire Identification”.
Reuse existing harness sleeving between light and new
connectors. Secure sleeving at both ends using cable ties.
If damage,replace the sleeving by sleeve S10155E10.
Cut existing wire harness 3867016−503 to a length
of 7.00 in. (177.8 mm).
Minimize distance between light and sleeving.
Rework existing third crew mask light wire assembly as shown.
6
9
8
7
9
5

### Page 37

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 35 of 43
Jun 01/2021
Revision B, Apr 21/2022
Bracket Modification
Figure 5 (Sheet 1 of 2)
rsb601r35022_015.cgm, sk, apr11/2022
A
A
INSTALLATION −1
B
B
LEGEND
1. Harness 3867016−503.
2. Wire harness assembly
    KCM601R41056−5.
3. Flexible lamp assembly 36491−5.
4. Bracket  4592045−3 (Pre Mod)
2
3
4
0.500 TO 0.600 in.
(12.70 TO 15.20 mm)
2
POST−MOD
VIEW LOOKING FORWARD
−B B
Make sure there is no contact between
harness sleeving and trimmed bracket.
2
PRE−MOD
VIEW LOOKING FORWARD
−
1
B B
1
4
NOTE
Trim the bracket and make the re−identification.1
    KCM601R41056−2100 (Post Mod).

### Page 38

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 36 of 43
Jun 01/2021
Revision B, Apr 21/2022
Bracket Modification
Figure 5 (Sheet 2 of 2)
rsb601r35022_016.cgm, sk, apr11/2022
A
Make sure there is no contact between
harness sleeving and trimmed bracket.
2
3
POST−MOD
VIEW LOOKING FORWARD
−B B
LEGEND
1. Harness 3867016−503.
2. Wire harness assembly
    KCM601R41056−5.
3. Flexible lamp assembly 36491−5.
4. Bracket  4592045−3 (Pre Mod)
PRE−MOD
VIEW LOOKING FORWARD
−
1
B B
4
41
A
INSTALLATION −3
B
B
NOTE
Trim the bracket and make the re−identification.1
22
0.500 TO 0.600 in.
(12.70 TO 15.20 mm)
    KCM601R41056−2100 (Post Mod).

### Page 39

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 37 of 43
Jun 01/2021
Revision B, Apr 21/2022
Flexible Lamp Assembly
Figure 6
rsb601r35022_017.cgm, sk, apr11/2022
A
1
LEGEND
1. Flexible lamp assembly 36491−5.B
POINT A
(REF)
POINT B
(REF)
B
A
INSTALLATION
−1 AND −3
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
−
POINT B
(REF)
POINT A
(REF)
C C
C
C

### Page 40

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 38 of 43
Jun 01/2021
Revision B, Apr 21/2022
For Aircraft that have incorporated revision NC or A of this service bulletin
PART B − Bracket  Modification
Reference Information
REFERENCE DESIGNATION
AMM 20−60−13−930−801 Identification of Aircraft Parts and Assemblies
AMM 24−00−00−910−801 Electrical/Electronic Safety Precautions
AMM 33−13−23−000−801 Removal of the Observer’s Oxygen Mask
Compartment Flexible Lamp
AMM 33−13−23−400−801 Installation of the Observer’s Oxygen Mask
Compartment Flexible Lamp
AMM 35−00−00−910−801 Oxygen Safety Precautions
AMM 35−11−15−000−801 Removal of the Crew Oxygen Mask Stowage Box
AMM 35−11−15−400−801 Installation of the Crew Oxygen Mask Stowage
Box
ESPM 20−11−00 Wire Stripping and Wire/Cable Damage Repair −
Maintenance Practices
SRM 51−21−16 Finish Codes
SRM 51−24−36 Cutting of Sheet metal
D. Job Set-Up
NOTE: The steps in the Job Set-Up section of this service bulletin are
recommended steps. The steps give a recommendation to get access
to the work area. This recommendation is to give a safe work area and
to minimize possible damage to surrounding aircraft parts. Alternative
steps can be used at the operator discretion.
(1) Obey all the electrical/electronic safety precautions (refer
to AMM 24−00−00−910−801).
(2) Obey all the oxygen safety precautions (refer to AMM 35−00−00−910−801).
WARNING: DO NOT LET OIL, GREASE, OR OTHER PETROLEUM PRODUCTS GET
ON YOUR HANDS, CLOTHING, OR THE EQUIPMENT USED TO DO
WORK ON THE OXYGEN SYSTEM.  OXYGEN CAN CAUSE
SPONTANEOUS IGNITION OF PETROLEUM PRODUCTS.  THIS COULD
CAUSE DAMAGE TO EQUIPMENT AND INJURY TO PERSONS.

### Page 41

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 39 of 43
Jun 01/2021
Revision B, Apr 21/2022
(3) Make sure that the work area is clean and that any tools or equipment have
no oil, grease, or other petroleum based lubricant on them when you work on
or near any breathing oxygen equipment.
(4) Remove the 3rd crew member oxygen mask stowage box 
(refer to AMM 35−11−15−000−801).
E. Procedure
(1) If it is not possible to complete all the instructions in this service bulletin
because of the configuration of the aircraft, speak with a representative of
MHIRJ in the CRC at 450−990−7CRC (450−990−7272) direct,
1−833−990−7CRC (1−833−990−7272) toll free for North America or
+1−450−990−7CRC (+1−450−990−7272) for international callers or e-mail
at thd.crj@MHIRJ.com for analysis and to get an approved disposition to
complete this service bulletin.
Refer to Figure 6
(2) Do an inspection of the installation of the flexible lamp assembly (1) as
follows:
(a) Make sure that the end of the flexible lamp (1) with the electrical wire is
installed on the lower face of the upper panel of the oxygen box
compartment (Point A).
(b) Make sure that the end of the flexible lamp (1) without the electrical wire
is installed on the aft face of the forward panel of the oxygen box
compartment (Point B).
(c) If the installation of the flexible lamp (1) is not correct, the installation
must be corrected as follows:
1 Remove the flexible lamp assembly (1) 
(refer to AMM 33−13−23−000−801).
2 Install the flexible lamp assembly (1) 
(refer to AMM 33−13−23−400−801).

### Page 42

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 40 of 43
Jun 01/2021
Revision B, Apr 21/2022
Refer to Figure 5
(3) Do an inspection of the wire harness assembly (2) to make sure that there is
no damage to the harness at the bracket (4) location.
(a) If damage is found, then repair the damage (refer to ESPM 20−11−00).
(4) Trim the bracket (4) as follows:
(a) Trim the bracket (4) to have a distance of 0.500 to 0.600 inch 
(12.70 to 15.20 mm) between the bracket edge and the lower face of the
upper panel of the oxygen box compartment (refer to SRM 51−24−36).
(b) Make sure that the distance between the bracket (4) and the lower face
of the upper panel of the oxygen box compartment is 0.500 to 0.600 inch
(12.70 to 15.20 mm).
(c) Touch−up the reworked area on bracket (4) with finish code A046 
(refer to SRM 51−21−16).
(d) Re−identify the bracket (4) as KCM601R41056−2100 
(refer to AMM 20−60−13−930−801).
1 If it is not possible to re−identify the bracket (4), then make a label
of maximum 4.00 x 4.00 inch (100 x 100 mm).
2 Use ink marking method to identify the bracket (4) next to the
manufacturer identification to a similar size of the original marking
(refer to AMM 20−60−13−930−801).
(5) Make sure that there is no contact between the harness (2) and the bracket
(4).
F . Job Close-Out
NOTE: The steps in the Job Close-Out section of this service bulletin, except for
the return-to-service tests, are recommended steps. The steps give a
recommendation to install components removed during the Job Set-Up.
This recommendation is to make sure that the aircraft is safe and ready
to return to service. Alternative steps can be used at the operator
discretion.
(1) Install the 3rd crew member oxygen mask stowage box 
(refer to AMM 35−11−15−400−801).
(2) Remove all tools, equipment, and unwanted materials from the work area.
(3) When PART B of this service bulletin is completed, make this entry in the
applicable logbooks: /quoteblleftService Bulletin 601R−35−022, Revision B, Oxygen −
General − Inspection and Modification of the 3rd Crew Member Oxygen Mask
Stowage Box Compartment Lamp Harness, PART B, incorporated."

### Page 43

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 41 of 43
Jun 01/2021
Revision B, Apr 21/2022
For All Aircraft
3. MATERIAL INFORMATION
A. Kit Information
.
KIT 601R35−022K1
PART NUMBER QTY NAME ALTERNATIVE NOTES
NAS1368N4A 2 Grommet
B0816032−001 7 Cable Tie mount /C0001
MS3367−5−9 7 Cable Ties /C0001
48−7190 2 Connector /C0019 and
/C0004 or /C0006
48−7191 2 Receptacle /C0019 and
/C0004 or /C0006
M22759/34−22−9 50in. Wire (AWG22) /C0004 or /C0006
M39029/32−248 2 Socket Contact /C0019 and
/C0004 or /C0006
M39029/31−229 2 Pin Contact /C0019 and
/C0004 or /C0006
CM−SCE−TP−1/4−
4H−9
2 Marker Tag /C0019 and
/C0004 or /C0006
MS3367−4−9 8 Cable Ties /C0019 and
/C0004 or /C0006
1−480699−0 1 Cap Housing /C0004 or /C0006
350690−7 2 Pin Contact /C0004 or /C0006

### Page 44

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 42 of 43
Jun 01/2021
Revision B, Apr 21/2022
PART NUMBER NOTES ALTERNATIVENAMEQTY
/C0001 The kit can contain more hardware and/or material than necessary.
/C0019 Part necessary to assemble wiring Harness KCM601R41056−5
/C0004 Part necessary to assemble wiring Harness KCM601R41056−7
/C0006 Part necessary to assemble wiring Harness KCM601R41056−9
.
NOTE: For permitted alternative to superseded parts, refer to the Parts
Supersession Cross References Lists at www.iflybombardier.com under
Resources − Engineering Documents.
NOTE: Some parts listed in the kit content of this service bulletin are supplied in
a temporary condition of supply configuration. These parts are identified
with a −SB, /SB, SB or other suffix after the MHIRJ engineering part
number. When the parts are installed, with the instructions given in the
Accomplishment Instructions of this service bulletin, the parts agree with
the requirements of the engineering configuration. Refer to the SB
Introduction document for more explanation.
B. Consumable Information
The materials that follow are necessary to do this service bulletin. You can order
them from MHIRJ or purchased directly from industry sources. If the material is
ordered from MHIRJ, there can be some lead time because of the shelf life of the
material.
CONSUMABLES
SPECIFICATION QTY NAME REFERENCE
GRADE 686 DM 1/8 25 inch Sleeve Expanded   /C0001
S10155E10 as required Sleeve  
/C0001  Refer to ESPM 20−12−00
NOTE: To complete this list of consumables, refer to the different tasks that are
given as references in this service bulletin
C. Special Tools and Equipment
For a list of special tools and equipment, refer to the different tasks and the C&D
service bulletin that are given as references in this service bulletin.

### Page 45

SERVICE BULLETIN  601R−35−022
SB 601R−35−022
Page 43 of 43
Jun 01/2021
Revision B, Apr 21/2022
D. Disposition of Parts
PRE-SB
PART NUMBER
NAME QTY DC POST -SB
PART NUMBER
NAME
HA1NAN09 Silrub 1 SAL
3867016−503 Wiring Harness(Surround Light) 1 MOD
Disposition code (DC):
MOD: Modification: For modification of part, refer to the procedure given in this
service bulletin.
SAL: Salvage.
1

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