Revision ‘C’ 28 Jun 2011

DHC ---8 (DASH 8)

SERVICE BULLETIN 84 ---52 ---69

Doors --- Passenger/Crew Airstair --- Seal System Shut Off Valve Control

Logic Change --- ModSum 4 ---126513

This page transmits Revision ‘C’ of Service Bulletin 84 ---52 ---69,

pages 1 thru 22, dated 28 Jun 2011.

This service bulletin is re ---issued in its entirety for the reasons that follow:

the References section is revised to convey the latest revision of the service

bulletin and engineering documentation

the Material Information section, para C, step (2) is revised to add a figure

reference number 7.

The Compliance in the previous issue(s) of this service bulletin is not

affected by this revision. No additional rework to the aircraft is introduced by

this revision.

Remove Service Bulletin 84 ---52 ---69 Revision ‘B’ and replace with attached.

Previous issues of Service Bulletin 84 ---52 ---69:

Initial issue --- Pages 1 thru 14 dated 28 Jan 2011

Revision ‘A’ --- Pages 1 thru 22 dated 26 Apr 2011

Revision ‘B’ --- Pages 1 thru 22, dated 09 May 2011

D

S.B. 84 ---52 ---69

Page 1 of 22

RL

28 Jan 2011

Revision ‘C’ 28 Jun 2011

SERVICE BULLETIN

Customer

Support

ATA SYSTEM: 5211 NUMBER: 84 ---52 ---69

BOMBARDIER AEROSPACE REGIONAL AIRCRAFT CONSIDER THIS

SERVICE BULLETIN TO BE PARTICULARLY SIGNIFICANT AND

URGES OPERATORS TO PROMPTLY EVALUATE THE CONTENTS

SUBJECT: Doors --- Passenger/Crew Airstair --- Seal System Shut Off Valve

Control Logic Change --- ModSum 4 ---126513

1. PLANNING INFORMATION

A. Effectivity

Aircraft Affected:

In ---Service: DHC ---8 Aircraft Model 401 and 402 Serial Number 4001 thru

4361.

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
SERVICE BULLETIN 84 ---52 ---69

S.B. 84 ---52 ---69

Page 2 of 22

RL

28 Jan 2011

Revision ‘C’ 28 Jun 2011

B. Reason

Problem: Existing airstair door pneumatic shut ---off valve control logic wiring

requires both Input/Output Modules (IOM’s) to indicate airspeed less than

100 knots to de ---energize the valve and deflate the airstair door seal.

Incase of a single IOM failure in greater than 100 knots state, the door seal

may be prevented from deflating on the ground.

Solution: This service bulletin incorporates wiring changes to allow deflation of

airstair door seal if either IOM indicates airspeed less than 100 knots.

C. Description

The procedures in this service bulletin give the instructions to do the tasks that

follow:

--- AFM Temporary Amendment #24 must be removed when ModSum 4 ---126513

is installed

--- 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

--- new wires are added

--- new splices are added

--- a return to service procedure of the airstair door seal is done

--- close out.

D. Compliance

Bombardier Inc. recommends incorporation of ModSum 4 ---126513 at the earliest

opportunity unless otherwise directed by the operator’s airworthiness authority.
SERVICE BULLETIN 84 ---52 ---69

S.B. 84 ---52 ---69

Page 3 of 22

RL

28 Jan 2011

Revision ‘C’ 28 Jun 2011

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).

F. Manpower

It will take an estimated 12 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 2.00 Access

4.00 Wiring

Test / RTS 2.00

Close ---Out 3.00

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

ModKits 8MK4461 ---001 and 8MK4464 ---001 are available through the Customer

Accounts Service Team at Bombardier Aerospace Regional Aircraft division.

Operators should submit a purchase order specifying aircraft serial number(s) to:

Bombardier Aerospace

Customer Accounts Services Team (Mail Stop N11 ---32)

123 Garratt Blvd.

Toronto

Ontario

Canada M3K 1Y5

Facsimile: (416) 375 ---3060

Telephone: (416) 375 ---3920
SERVICE BULLETIN 84 ---52 ---69

S.B. 84 ---52 ---69

Page 4 of 22

RL

28 Jan 2011

Revision ‘C’ 28 Jun 2011

Kit Number Description

8MK4461 ---001 Retrofit --- Airstair Door System Shut

Off Valve

(A/C 4001 --- 4094)

8MK4464 ---001 Retrofit --- Airstair Door System Shut

Off Valve

(A/C 4095 --- 4361)

H. Tooling --- Price and Availability

None

I. Weight and Balance

None

J. Electrical Load Data

Not affected

K. Publications Affected

Flight Manual PSM 1 ---84 ---1A ......................................

Wiring Diagrams Manual PSM 1 ---84 ---2W ............................

ModSums Manual PSM 1 ---84 ---12 ..................................
SERVICE BULLETIN 84 ---52 ---69

S.B. 84 ---52 ---69

Page 5 of 22

RL

28 Jan 2011

Revision ‘C’ 28 Jun 2011

L. References

Revision ‘C’ of this service bulletin was prepared to the engineering drawings and

related data that follows:

DRAWING SHEET REV

8MK4461 1 A

8Z9287 1 --- ---

8Z9287 2 --- ---

8MK4464 1 C

8Z9293 1 B

8Z9293 2 A

ModSum 4Q126513 Rev. ‘G’

ModSum 4 ---126513 Rev. ‘G’

PCA 43132 Revision 2 (for internal reference only)

2. MATERIAL INFORMATION

A. Parts Required Per Aircraft

For Modification Kit 8MK4461 ---001:

(1) Modification Kit 8MK4461 ---001, Retrofit --- Airstair Door System Shut Off

Valve for aircraft serial number 4001 thru 4094

(2) Detailed Kit Content:

Quantity Per Kit

---001

Part Number Description Remarks

1 8Z9287 ---013 Cable Assembly

1 8Z9287 ---011 Cable Assembly

2 DSC347 ---1/8 ---2.00 ---9 ID Sleeve see Note 1

2 M81824/1 ---2 Splice

100 CR4H Connector Ring

100 B0816019 ---003 Strap Tie Down see Note 2

For Modification Kit 8MK4464 ---001:

(3) Modification Kit 8MK4464 ---001, Retrofit --- Airstair Door System Shut Off

Valve for aircraft serial number 4095 thru 4361.
SERVICE BULLETIN 84 ---52 ---69

S.B. 84 ---52 ---69

Page 6 of 22

RL

28 Jan 2011

Revision ‘C’ 28 Jun 2011

(4) Detailed Kit Content:

Quantity Per Kit

---001

Part Number Description Remarks

1 M81824/1 ---1 Splice #16 ---20

1 600 ---057 Band Clamp

1 8Z9293 ---011 Cable Assembly

2 M81824/1 ---2 Splice #16 ---20

2 DSC347 ---1/8 ---2.00 ---9 ID Sleeve see Note 1

100 CR4H Connector Ring

100 B0816019 ---003 Strap Tie Down see Note 2

NOTE 1: P/N 3PS ---125 ---2 ---WT from Brady W.H Corp (cage code 85480) or

TMS ---SCE 1/8 ---2.0 ---9 from Tyco Electronics (cage code 06090)

can be used as an alternative.

NOTE 2: P/N TY25M* from Thomas and Betts (cage code 56501) can be

used as an alternative.

‘*’ is the order quantity.

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

(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 thru each main gear and main gear door

mechanism.
SERVICE BULLETIN 84 ---52 ---69

S.B. 84 ---52 ---69

Page 7 of 22

RL

28 Jan 2011

Revision ‘C’ 28 Jun 2011

(3) Make sure the nose gear ground lock is engaged.

(4) Remove forward lower wardrobe. Refer to Maintenance Manual Task

25 ---24 ---03 ---000 ---801.

(5) For aircraft serial number 4095 thru 4361 only. Remove floor access panels

131BZ and 131CZ. Refer to AMM Task 06 ---43 ---00 ---992 ---801.

B. Procedure (For aircraft serial numbers 4001 thru 4094)

NOTE: If applicable, circuit breaker collar installed by IS4Q5250025 must be

removed when ModSum 4 ---126513 is installed.

(1) Reterminate the following wires as follows: Refer to Figure 1

NOTE: Splices 5213 ---E1 and 5213 ---E4 are within 12 inches of connector

3140 ---P1A ---A1. Refer to Figure 1, Note 1.

NOTE: Existing splice 5213 ---E2 and new splice 5213 ---E3 to be as close as

possible to connector 9811 ---J161. Refer to Figure 1, Note 2

NOTE: Wires to be routed with existing compatible EMC/Wire codes using tie

wraps and connector rings.
SERVICE BULLETIN 84 ---52 ---69

S.B. 84 ---52 ---69

Page 8 of 22

RL

28 Jan 2011

Revision ‘C’ 28 Jun 2011

(2) Install the following wire to create cable assembly 8Z9287---011: Refer to Figure 1

NOTE: P/N 55PC0211 ---22 ---9 from Tyco Electronics (cage code 06090) can be used

as an alternative

(see Note below)

22 GAUGE WIRE

15 FEET

(3) Install the following wires to create cable assembly 8Z9287---013: Refer to Figure 1

NOTE: P/N 55PC0211 ---22 ---9 from Tyco Electronics (cage code 06090) can be used

as an alternative

(see Note below)

22 GAUGE WIRE

23 FEET
SERVICE BULLETIN 84 ---52 ---69

S.B. 84 ---52 ---69

Page 9 of 22

RL

28 Jan 2011

Revision ‘C’ 28 Jun 2011

Wiring Diagram

Figure 1

CABLE ASSEMBLY8Z9287 ---011

CABLE ASSEMBLY8Z9287 ---013

NOTE 1: Splices 5213 ---E1 and 5213 ---E4 are within

12 inches of connector 3140 ---P1A ---A1.

SEE NOTE 1 and

NOTE 2: Existing splice 5213 ---E2 and new splice

5213 ---E3 to be as close as possible to connector 9811 ---J161.

SEE NOTE 2
SERVICE BULLETIN 84 ---52 ---69

S.B. 84 ---52 ---69

Page 10 of 22

RL

28 Jan 2011

Revision ‘C’ 28 Jun 2011

Plan View

Figure 2

Refer to Figure 4 forForward Continuation
SERVICE BULLETIN 84 ---52 ---69

S.B. 84 ---52 ---69

Page 11 of 22

RL

28 Jan 2011

Revision ‘C’ 28 Jun 2011

Relay Rack

Figure 3
SERVICE BULLETIN 84 ---52 ---69

S.B. 84 ---52 ---69

Page 12 of 22

RL

28 Jan 2011

Revision ‘C’ 28 Jun 2011

Isometric View Looking Outboard at Avionics Rack Location

Figure 4

Refer to Figure 2

for Aft Continuation
SERVICE BULLETIN 84 ---52 ---69

S.B. 84 ---52 ---69

Page 13 of 22

RL

28 Jan 2011

Revision ‘C’ 28 Jun 2011

Detail A (Partial Wiring Shown)

Figure 5
SERVICE BULLETIN 84 ---52 ---69

S.B. 84 ---52 ---69

Page 14 of 22

RL

28 Jan 2011

Revision ‘C’ 28 Jun 2011

Isometric View Looking Aft on Avionics Rack

Figure 6
SERVICE BULLETIN 84 ---52 ---69

S.B. 84 ---52 ---69

Page 15 of 22

RL

28 Jan 2011

Revision ‘C’ 28 Jun 2011

C. Procedure (For aircraft serial numbers 4095 thru 4361)

NOTE: If applicable, circuit breaker collar installed by IS4Q5250025 must be

removed when ModSum 4 ---126513 is installed.

(1) Reterminate the following wires as follows: Refer to Figure 7

NOTE 1: Existing splice 5213 ---E2 and new splice 5213 ---E3 to be

approximately 12 inches from connector 9811 ---RJB1 ---P1B.

NOTE 2: Wires to be routed with existing compatible EMC/Wire codes

using tie wraps and connector rings.

NOTE 3: If splice 5213 ---E1 is not in visible part of existing harness

then maybe within backshell of connector 3140 ---P1A ---A1.

NOTE 4: Band clamp required within backshell.
SERVICE BULLETIN 84 ---52 ---69

S.B. 84 ---52 ---69

Page 16 of 22

RL

28 Jan 2011

Revision ‘C’ 28 Jun 2011

(2) Install the following wires to create cable assembly 8Z9293---011: Refer to Figure

7.

NOTE: P/N 55PC0211 ---22 ---9 from Tyco Electronics (cage code 06090) can be used

as an alternative

(see Note below)

22 GAUGE WIRE

36 FEET
SERVICE BULLETIN 84 ---52 ---69

S.B. 84 ---52 ---69

Page 17 of 22

RL

28 Jan 2011

Revision ‘C’ 28 Jun 2011

Wiring Diagram

Figure 7

BAND CLAMP600 ---057(required within backshell)

see Note 1

see Note 3

NOTE 1: Existing splice 5213 ---E2 and new splice 5213 ---E3

to be approximately 12 inches from connector9811 ---RJB1 ---P1B.

NOTE 3: If splice 5213 ---E1 is not in visible part of existing

harness then maybe within backshell of connector3140 ---P1A ---A1.

CABLE ASSEMBLY8Z9293 ---011

CABLE ASSEMBLY 8Z9293 ---011
SERVICE BULLETIN 84 ---52 ---69

S.B. 84 ---52 ---69

Page 18 of 22

RL

28 Jan 2011

Revision ‘C’ 28 Jun 2011

View Looking Outboard on Left Hand Side

Figure 8
SERVICE BULLETIN 84 ---52 ---69

S.B. 84 ---52 ---69

Page 19 of 22

RL

28 Jan 2011

Revision ‘C’ 28 Jun 2011

Wiring Route

Figure 9
SERVICE BULLETIN 84 ---52 ---69

S.B. 84 ---52 ---69

Page 20 of 22

RL

28 Jan 2011

Revision ‘C’ 28 Jun 2011

Wiring Route (View Looking Down)

Figure 10
SERVICE BULLETIN 84 ---52 ---69

S.B. 84 ---52 ---69

Page 21 of 22

RL

28 Jan 2011

Revision ‘C’ 28 Jun 2011

D. Close Out

(1) Remove all tools and equipment from the work area.

(2) Perform a test of the Airstair Door seal per the enclosed return to service

procedure (RTS).

(3) Install forward lower wardrobe. Refer to Maintenance Manual Task

25 ---24 ---03 ---400 ---801.

(4) Install floor access panels 131BZ and 131CZ. Refer to Maintenance Manual Task

06 ---43 ---00 ---992 ---801. (on aircraft serial number 4095 thru 4361 only)

(5) 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.
SERVICE BULLETIN 84 ---52 ---69

S.B. 84 ---52 ---69

Page 22 of 22

RL

28 Jan 2011

Revision ‘C’ 28 Jun 2011

Note: Wait 30 seconds for completion of Power On Self Test (POST) before

confirming expected results.

see Note below

see Note below

1
Jan 2009

SERVICE BULLETIN (SB) --- RECORD OF INCORPORATION

--- Q SERIES DASH 8 AIRCRAFT

To: CMDB Focal

Facsimile: (1) 416 375 4538

E --mail: cmdb.requests@aero.bombardier.com

From:

Company:

Phone: Extn:

Facsimile: Date:

E --mail:

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
Feb 2009

SERVICE BULLETIN (SB) --- COMMENT SHEET --- Q SERIES DASH 8 AIRCRAFT

To: SB Focal (Toronto), Bombardier Aerospace Commercial Aircraft

Phone: (1) 416 375 4078 Facsimile: (1) 416 375 4538

E --mail: syed.rizvi@aero.bombardier.com

From:

Company:

Phone: Extn:

Facsimile: Date:

E --mail:

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 Tooling V References V Publications Affected

2. MATERIAL INFORMATION

V Kit Content V Special Tools/Equipment V Parts to Modify Spares

V Consumables V Disposition of Existing Parts V Other

3. ACCOMPLISHMENT INSTRUCTIONS

V Job Set ---Up V Procedure V Close---Out V Test

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