# Bombardier Service Bulletin 84-36-04

Copy: Revision B ("U.S. DOT/FAA - Service Bulletin 84-36-04B"), 24 pages: PDF https://openairdocs.org/files/sha256/dc/38/dc38b19b6c9212e049c2dafaed9fd1dc5d45c756027bca8a5cc27d4892f1a53d; text https://openairdocs.org/service-documents/bombardier/sb-84-36-04/file/dc38b19b6c92.md. Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2013-1068; AD 2014-15-20 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: 84-36-04
- Latest revision known: 84-36-04, Revision B, dated January 2, 2014 (OpenAirDocs)
- Page: https://openairdocs.org/service-documents/bombardier/sb-84-36-04

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

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

- [AD 2014-15-20](https://openairdocs.org/ad/2014-15-20.md), effective Sep 19, 2014: Revisions A and B

Also cited in [1 proposed AD](https://openairdocs.org/service-documents/bombardier/sb-84-36-04/proposed.md).

## Text (24 pages)

Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2013-1068; AD 2014-15-20 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

Revision ‘B’ 02 Jan 2014
DHC-8 (DASH 8)
SERVICE BULLETIN 84-36-04
Pneumatics - Ice & Rain Protection and Bleed Air System - Segregation
of HPSOV Power Supply from TMU - ModSum 4-110595
This page transmits Revision ‘B’ of Service Bulletin 84-36-04, pages 1 thru
20, dated: 02 Jan 2014.
This service bulletin is re-issued in its entirety for the reasons that follow:
- The PLANNING INFORMATION D. Compliance section is revised to add
Transport Canada Airworthiness Directive CF-2013-27
- The References section is revised to convey the latest revision of the
service bulletin and engineering documentation
- The ACCOMPLISHMENT INSTRUCTIONS section is revised to correct
Wiring Diagram Figure 8 connector pin on 9811-P421 was N now N-. Added
to Figure 1 thru Figure 7 the title Segregation of HPSOV Power Circuit From
TMU
The Compliance in the previous issue of this service bulletin is not affected
by this revision. No additional rework to the aircraft is introduced by this
revision.
Remove the previous issue of this Service Bulletin 84-36-04 and replace with
attached.
Previous issues of Service Bulletin 84-36-04:
Initial issue - Pages 1 thru 20 dated 13 Mar 2013

### Page 2

(No text on this page.)

### Page 3

D
S.B. 84-36-04
Page 1 of 20
13 Mar 2013
Revision ‘B’ 02 Jan 2014 MD
SERVICE BULLETIN
Customer
Support
ATA SYSTEM: 3600 NUMBER: 84-36-04
BOMBARDIER AEROSPACE REGIONAL AIRCRAFT CONSIDER THIS
SERVICE BULLETIN TO BE PARTICULARLY SIGNIFICANT AND
URGE OPERATORS TO PROMPTLY EVALUATE THE CONTENTS
SUBJECT: Pneumatics - Ice & Rain Protect ion and Bleed Air System - Segregation
of HPSOV Power Supply from TMU - ModSum 4-110595
1. PLANNING INFORMATION
A. Effectivity
Aircraft Affected:
In-Service: DHC-8 Aircraft Models 401 and 402 Serial Numbers 4001,
4003 thru 4446.
Production: ModSum 4-110595 will be installed before delivery on
applicable DHC-8 Aircraft at Serial Number 4447 and
subsequent.
NOTE: The instructions in this service bulletin are only applicable to the systems
and parts installed at the time of delivery on the aircraft or as changed by
Bombardier Aerospace Service Bulletin(s). Before you do this bulletin,
examine all STC or equivalent action changes to make sure this bulletin
can be completed.
Spares Affected:
None

### Page 4

SERVICE BULLETIN 84-36-04
S.B. 84-36-04
Page 2 of 20
13 Mar 2013
Revision ‘B’ 02 Jan 2014 MD
B. Reason
Problem: The TMU (Timer and Monitor Unit) and HPSOV (High Pressure Shut-off
V a l v e )a r ec u r r e n t l yo nt h es a m e1a m pc i r c u i tb r e a k e ra n db e c a u s et h e
TMU is a class one installation it should have a separate power source than
any other component. In addition the HPSOV is critical to provide sufficient
de-ice pressure to the system. When the circuit breaker pops there are
numerous caution lights appearing and operators have to exit icing
conditions.
Solution: This service bulletin provides instructions to segregate the power source
for the TMU via a wiring change.
C. Description
The procedures in this service bulletin give the instructions to do the tasks that
follow:
- aircraft is put into standard configuration for maintenance
- aircraft electrical power is removed
- the nose landing gear lock is engaged
- the main landing gear lock pins are installed thru each main gear and main gear
door mechanism
- access panels are opened
- some wires are reterminated and new wires are added
- a return to service procedure is done
- close out.
D. Compliance
Bombardier Inc. recommends incorpora tion of ModSum 4-110595 at the earliest
opportunity unless otherwise directed by the operator’s airworthiness authority.
Transport Canada Airworthiness Directive CF-2013-27.
E. Approval
The technical content of this service bulletin has been approved under the
authority of the Transport Canada Civil Aviation (TCCA) Design Approval
Organization No: DAO #93-Q-02.
This service bulletin does not affect Airworthiness Limitations (AWLs) or Damage
Tolerance Inspections (DTIs).

### Page 5

SERVICE BULLETIN 84-36-04
S.B. 84-36-04
Page 3 of 20
13 Mar 2013
Revision ‘B’ 02 Jan 2014 MD
F. Manpower
It will take an estimated 9 man-hours to complete this service bulletin. The
breakdown of the man-hours is shown in the table that follows:
TASK MAN-HOURS
Job Set-Up 1.00
Procedure 6.00
Test / RTS 1.00
Close-Out 1.00
For any on-site labor assistance, please speak with a Fleet Services representative
for a quote. The Fleet Services group can be contacted via the Q Series Technical
Help Desk by telephone at 416-375-4000 or email at:
thd.qseries@aero.bombardier.com.
G. Material - Price and Availability
The parts detailed in Paragraph 2.A. may be either furnished or fabricated from the
operator’s existing stock, purchased as single items from Bombardier Aerospace
Regional Aircraft or purchased directly from industry sources.
H. Tooling - Price and Availability
None
I. Weight and Balance
A/C Type and
Model
Weight (Lb) Arm (Inches)
Moment
(Inches x Lb)
x 0.001
DHC-8 Model
401/402 KIT -
8DK4224-001
+0.43 103.18 +0.04

### Page 6

SERVICE BULLETIN 84-36-04
S.B. 84-36-04
Page 4 of 20
13 Mar 2013
Revision ‘B’ 02 Jan 2014 MD
J. Electrical Load Data
1. Direct Current Loads
Applicability Amperes Bus
ECS/BA Cont
RA u t o
s e eT y p eo fL o a dD a t aC h a n g e
below
RM a i nD C
ECS/BA Cont
LA u t o
s e eT y p eo fL o a dD a t aC h a n g e
below
LM a i nD C
2. Alternating Current Loads
Not Affected
3. Type of Load Data Change
Type Nominal Maximum Other Information
Cyclic
OR
Intermittent
OR
Continuous +0.20A +0.20A see Note 1 below
NOTE 1: Applicable to operating conditions (OC) 1 through 8.
K. Publications Affected
Maintenance Manual PSM 1-84-2................................
Wiring Diagrams Manual PSM 1-84-2W............................
Fault Isolation Manual PSM 1-84-23..............................
ModSums Manual PSM 1-84-12..................................
Weight and Balance Manual (Imperial) PSM 1-84-8................
Weight and Balance Manual (Metric) PSM 1-84-8M..................

### Page 7

SERVICE BULLETIN 84-36-04
S.B. 84-36-04
Page 5 of 20
13 Mar 2013
Revision ‘B’ 02 Jan 2014 MD
L. References
Revision ‘B’ of this service bulletin was prepared to the engineering drawings and
related data that follows:
DRAWING SHEET REV
8DK4224 1 --
8Z6405 1 B
8Z6405 2 A
ModSum 4Q110595 Rev. ‘D’
ModSum 4-110595 Rev. ‘D’
PCA 44151 Revision 0 (for internal reference only)
Transport Canada Airworthiness Directive CF-2013-27.
2. MATERIAL INFORMATION
A. Parts Required Per Aircraft
(1) Detailed Parts List:
Quantity Per Air-
craft
Part Number Description Remarks
2 FEET DSC230-6HT SPIRAL WRAP see NOTE 1
5 CSCS-M CABLE SPACER CROSS
30 CR4H CONNECTOR RING
50 B0816019-003 TIE STRAP see NOTE 2
4 M39029/56-351 CONTACT SOCKET
2 M81824/1-2 SPLICE
2 M81824/1-1 SPLICE
46 FEET B0801150-20-9 WIRE 20AWG see NOTE 3
NOTE 1: AMP (09482) P/N 500023 or Panduit (06383) P/N T12T or Zeus
(6Y909) P/N 2E125SCL9 are acceptable alternates.
NOTE 2: Panduit (06383) P/N PLT2S-(*)76 is an acceptable alternate.
(*) indicates quantity.

### Page 8

SERVICE BULLETIN 84-36-04
S.B. 84-36-04
Page 6 of 20
13 Mar 2013
Revision ‘B’ 02 Jan 2014 MD
NOTE 3: Judd (12703) P/N JWB0801150-20-9 or Tyco (K1010) P/N
55PC0211-20-9 are acceptable alternates
B. Parts Required to Modify Spares
None
C. Special Tools and Equipment Required
None
D. Existing Parts Accountability
None
3. ACCOMPLISHMENT INSTRUCTIONS
A. Job Set-Up
WARNING: MAKE SURE YOU INSTALL THE LOCKPINS ON THE MAIN LANDING
GEAR. MAKE SURE YOU ENGAGE THE NOSE GEAR LOCK. IF YOU
DO NOT DO THIS, THE LANDING GEAR CAN ACCIDENTALLY
RETRACT. THIS CAN CAUSE INJURIES TO PERSONS AND DAMAGE
TO THE EQUIPMENT.
WARNING: MAKE SURE YOU INSTALL THE LOCKPINS IN THE DOOR
MECHANISMS OF THE MLG AND NLG. THE DOOR MECHANISMS
CAN ACCIDENTALLY CLOSE THE LANDING GEAR DOORS. THIS CAN
CAUSE INJURIES TO PERSONS AND DAMAGE TO THE EQUIPMENT.
(1) Placard and select all aircraft electrical power to OFF. Obey all relevant
WARNINGS and CAUTIONS (refer to AMM TASK’S 24-00-00-861-802 and
24-00-00-910-801).
(2) Make sure that lock pins are installed through each main gear and main gear
door mechanism.
(3) Make sure the nose gear ground lock is engaged.
(4) On the LHS remove passenger seats from the airstair door up to station
X236.00, refer to AMM Task 25-21-01-000-801.
(5) Remove centre aisle carpet as well as carpet on the LHS from flight
compartment door up to station X236.00, refer to AMM Task 25-25-06-000-801.

### Page 9

SERVICE BULLETIN 84-36-04
S.B. 84-36-04
Page 7 of 20
13 Mar 2013
Revision ‘B’ 02 Jan 2014 MD
(6) Remove the following floor boards, refer to AMM Task 06-43-00-992-801 for
location:
- wardrobe floor
- 133AZ to 133FZ
- 131CZ to 131GZ
B. Procedure
(1) Reterminate the following wires (one end only):
NOTE: Remove any excess wire or tape and stow both ends of the remaining
wire. Refer to wiring diagram Figure 8 for length of wire and physical
location of splices.
(2) Reterminate the following wires (one end only):
NOTE: Refer to wiring diagram Figure 8 for length of wire and physical location of
splices.
NOTE: Maximum wire length of 6 inches is required in order to keep splices
close to the connector, so they can be located and serviced if required.
(3) Install new cable assemblies 8Z6405-011 and 8Z6405-013 as follows:
NOTE: Cable assemblies 8Z6405-011 and -013 are not provided in a kit and are
to be assembled by the operator using parts in section 2.A.(1). Refer to
page 17 of this service bulletin for composition of cable assemblies.

### Page 10

SERVICE BULLETIN 84-36-04
S.B. 84-36-04
Page 8 of 20
13 Mar 2013
Revision ‘B’ 02 Jan 2014 MD
(a) Route with existing cable harness as shown with compatible way
codes/EMC codes per WDM PSM 1-84-2W Chapter 20-12-10.
(b) Use existing clipping where practical or use connector rings CR4H or cross
spacers CSCS-M to maintain segregation.
(c) Install splices close to connectors, maximum of 6 inches, to ease locating
during maintenance and repair activities. Support splices in wire bundle
using tie-down straps B0816019-003.
(d) Identify wires per WDM Task 20-10-00-201.
C. Close Out
(1) Remove all tools and equipment from the work area.
(2) Do the enclosed Return to Service procedure
(3) Install the following removed floor boards, refer to AMM Task 06-43-00-992-801
for location:
- wardrobe floor
- 133AZ to 133FZ
- 131CZ to 131GZ
(4) Install removed carpet, refer to AMM Task 25-25-06-400-801.
(5) On the LHS install removed passenger seats, refer to AMM Task
25-21-01-400-801.
(6) On incorporation of this ModSum, add the weight and balance data shown in
Section 1 of this service bulletin to the Weight and Balance Manual PSM 1-84-8.
Under ‘Description of Change’ enter “ModSum 4-110595 incorporated.”
(7) On incorporation of this ModSum, make an entry that conforms to local
regulatory requirements in the applicable logbook(s). Enter component serial
numbers if applicable. Enter this ModSum number only after complete and
functional incorporation of all work defined in this service bulletin.

### Page 11

SERVICE BULLETIN 84-36-04
S.B. 84-36-04
Page 9 of 20
13 Mar 2013
Revision ‘B’ 02 Jan 2014 MD Segregation of HPSOV Power Circuit From TMU - Plan View
Figure 1

### Page 12

SERVICE BULLETIN 84-36-04
S.B. 84-36-04
Page 10 of 20
13 Mar 2013
Revision ‘B’ 02 Jan 2014 MD
Segregation of HPSOV Power Circuit From TMU - View B-B
Figure 2

### Page 13

SERVICE BULLETIN 84-36-04
S.B. 84-36-04
Page 11 of 20
13 Mar 2013
Revision ‘B’ 02 Jan 2014 MD
(ECS DUCT)
Segregation of HPSOV Power Circuit From TMU - View C-C
Figure 3

### Page 14

SERVICE BULLETIN 84-36-04
S.B. 84-36-04
Page 12 of 20
13 Mar 2013
Revision ‘B’ 02 Jan 2014 MD Figure 4
Segregation of HPSOV Power Circuit From TMU - View D-D

### Page 15

SERVICE BULLETIN 84-36-04
S.B. 84-36-04
Page 13 of 20
13 Mar 2013
Revision ‘B’ 02 Jan 2014 MD
Segregation of HPSOV Power Circuit From TMU - View E-E
Figure 5

### Page 16

SERVICE BULLETIN 84-36-04
S.B. 84-36-04
Page 14 of 20
13 Mar 2013
Revision ‘B’ 02 Jan 2014 MD
Segregation of HPSOV Power Circuit From TMU - View F-F
Figure 6

### Page 17

SERVICE BULLETIN 84-36-04
S.B. 84-36-04
Page 15 of 20
13 Mar 2013
Revision ‘B’ 02 Jan 2014 MD
Segregation of HPSOV Power Circuit From TMU - Detail G
Figure 7

### Page 18

SERVICE BULLETIN 84-36-04
S.B. 84-36-04
Page 16 of 20
13 Mar 2013
Revision ‘B’ 02 Jan 2014 MD
Wiring Diagram
Figure 8

### Page 19

SERVICE BULLETIN 84-36-04
S.B. 84-36-04
Page 17 of 20
13 Mar 2013
Revision ‘B’ 02 Jan 2014 MD
see NOTE below see NOTE below
NOTE: Judd (12703) P/N JWB0801150-20-9 or Tyco (K1010) P/N
55PC0211-20-9 are acceptable alternates
4
5
6
7
9
10
STRAP TIE DOWN
B0816019-003
CONNECTOR RING
CR4H
SPACER
CROSS
CSCS-MSPIRAL WRAP
DSC230-6HT
CABLE AS-
SEMBLY
8Z6405-013
CABLE AS-
SEMBLY
8Z6405-011
PARTS FIND NUMBER

### Page 20

SERVICE BULLETIN 84-36-04
S.B. 84-36-04
Page 18 of 20
13 Mar 2013
Revision ‘B’ 02 Jan 2014 MD
NOTES

### Page 21 (OCR)

SERVICE BULLETIN 84-36-04
Return to Service Procedure (RTS)
For HPSOV functionality:
1. Perform an operational check of the bleed air system per AMM task 36-11-00-710-802
under engine bleed. Do not de-energize the aircraft electrical system post task.
2. Check the CDS system for any system faults per AMM task 45-00-21-742-801 and
troubleshoot if there are any faults posted. Faults to look out for in particular are 1301 and
1302.
For ECS functionality:
1. Start both engines per AMM task 71-00-00-868-801.
2. Ensure both PLAs are set to FLIGHT IDLE and both CLAs are at MIN/850.
3. Turn the recirc fan on.
4. On air conditioning panel select pack switches to MAN, and temperature controls for flight
compartment and cabin to full cool.
5. Select both bleeds to ON with bleed flow selected at MAX.
6. Let system stabilize for five minutes.
7. Using the temperature gauge in the flight compartment selecting FC DUCT and CAB DUCT
and ensure temperatures are below 10 degrees celsius.
8. Perform AMM subtask 21-61-01-710-002.
9. Shutdown engines per AMM Task 71-00-00-868-802.
10. De-energize the electrical system per AMM task 24-00-00-861-802.
S.B. 84-36-04
13 Mar 2013
Revision 'B' 02 Jan 2014  Page 19 of 20
MD

### Page 22

SERVICE BULLETIN 84-36-04
S.B. 84-36-04
Page 20 of 20
13 Mar 2013
Revision ‘B’ 02 Jan 2014 MD
This Page Intentionally Blank.
1

### Page 23

Jan 2009
SERVICE BULLETIN (SB) - - - RECORD OF INCORPORATION
- - - Q SERIES DASH 8 AIRCRAFT
To : CMDB Focal
Facsimile: (1) 416 375 4538
E- -mai l: cmdb.requests@aero.bombardier .com
From:
Company:
Phone: Extn:
Facsimile: Date:
E- -mai l:
The data that you provide below will help us record the incorporation of this ModSum
and the aircraft effectivity in the maintenance manual.
Operator: Service Bulletin: __________________ Revision: _________
Aircraft Serial Number: Model Number: Date Bulletin Completed:
Aircraft Serial Number: Model Number: Date Bulletin Completed:
Aircraft Serial Number: Model Number: Date Bulletin Completed:
Aircraft Serial Number: Model Number: Date Bulletin Completed:
Aircraft Serial Number: Model Number: Date Bulletin Completed:
Aircraft Serial Number: Model Number: Date Bulletin Completed:
Aircraft Serial Number: Model Number: Date Bulletin Completed:
Aircraft Serial Number: Model Number: Date Bulletin Completed:
Aircraft Serial Number: Model Number: Date Bulletin Completed:
Aircraft Serial Number: Model Number: Date Bulletin Completed:
Aircraft Serial Number: Model Number: Date Bulletin Completed:
Aircraft Serial Number: Model Number: Date Bulletin Completed:
Fax this sheet to (1) 416 375 4538 or Email PDF to:
cmdb.requests@aero.bombardier.com

### Page 24

Feb 2009
SERVICE BULLETIN (SB) - - - COMMENT SHEET - - - Q SERIES DASH 8 AIRCRAFT
To : SB Focal (T oronto), Bombardier Aerospace Commercial Aircraft
Phone: (1) 416 375 4078 Facsimile: (1) 416 375 4538
E- -mai l: syed.rizvi@aero.bombardier .com
From:
Company:
Phone: Extn:
Facsimile: Date:
E- -mai l:
Select appropriate box(es) and add comments or suggestions you would like us to know
that may enhance the quality of our service bulletins.
Service Bulletin: Revision: ModSum:
1. PLANNING INFORMATION
V Effectivity V Reason V Description V Compliance
V Approval V Manpower V Material V Weight and Balance
V Electrical Load V T ooling V References V Publications Affected
2. MATERIAL INFORMATION
V Kit Content V Special T ools/Equipment V Parts to Modify Spares
V Consumables V Disposition of Existing Parts V Other
3. ACCOMPLISHMENT INSTRUCTIONS
V J o b S e t --- U p V Procedure V Close- - -Out V Te s t
V Illustration(s) V Other
4. COMMENTS, REMARKS, SUGGESTIONS
Fax this sheet to (1) 416 375 4538 or Email PDF to:
syed.rizvi@aero.bombardier.com

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