# Bombardier Service Bulletin 84-30-16

Copy: Revision A ("SB 84-30-16 Rev A"), 14 pages: PDF https://openairdocs.org/files/sha256/e3/5c/e35ce413a281e1c938d552d1793cdaf7f233166297c1c9cf552cfdfcf4cead33; text https://openairdocs.org/service-documents/bombardier/sb-84-30-16/file/e35ce413a281.md. Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2018-0118; AD 2018-17-17 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: 84-30-16
- Latest revision known: 84-30-16, Revision A, dated September 27, 2017 (OpenAirDocs)
- Page: https://openairdocs.org/service-documents/bombardier/sb-84-30-16

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

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

- [AD 2018-17-17](https://openairdocs.org/ad/2018-17-17.md), effective Oct 2, 2018: Revision A

Also cited in [1 proposed AD](https://openairdocs.org/service-documents/bombardier/sb-84-30-16/proposed.md).

## Text (14 pages)

Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2018-0118; AD 2018-17-17 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

Revision ‘A’ 27 Sep 2017
D H C --- 8 ( D A S H 8 )
S E R V I C E B U L L E T I N 8 4 --- 3 0 --- 1 6
Ice & Rain Protection - - - Windshield Heating System - - - T erminal Block
Mod - - - Application of Sealant to Heater T erminal Screws - - - Modsum
4 - - - 126654
This page transmits Revision ‘A’ of Service Bulletin 84- - -30- - -16, pages 1 thru
10 dated: 27 Sep 2017
This service bulletin is re- - -issued in its entirety for the reasons that follow:
--- t h eCompliance section is revised to add Transport Canada Airworthiness
Directive CF- - -2017- - -18
--- t h eReferences section is revised to convey the latest revision of the service
bulletin and engineering documentation and to add Transport Canada
Airworthiness Directive CF- - -2017- - -18
--- t h eProcedure section is revised to replace the NOTE after step (2)
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 initial issue of Service Bulletin 84- - -30- - -16 and replace with
attached.
Previous issue(s) of Service Bulletin 84- - -30- - -16:
Initial issue - - - Pages 1 thru 10 dated 31 Mar 2016

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(No text on this page.)

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D
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31 Mar 2016
Revision ‘A’ 27 Sep 2017 JR
SERVICE BULLETIN
Customer
Support
ATA SYSTEM: 3041 NUMBER: 84- - -30- - -16
BOMBARDIER AEROSPACE REGIONAL AIRCRAFT CONSIDER THIS
SERVICE BULLETIN TO BE PARTICULARL Y SIGNIFICANT AND
URGE OPERATORS TO PROMPTL Y EVALUATE THE CONTENTS
SUBJECT : Ice & Rain Protection - - - Windshield Heating System - - - T erminal Block
Mod - - - Application of Sealant to Heater T erminal Screws - - - Modsum
4 - - - 126654
1. PLANNING INFORMA TION
A. Effectivity
Aircraft Affected:
In- - -Service: DHC- - -8 Aircraft Models 401 & 402 Serial Numbers 4001, 4003
thru 4524
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

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B. Reason
Problem: Screws that fasten the windshield heater terminal lugs tend to loosen over
time. Environmental factors cause sparks leading to heater lugs burning,
in turn causes windshield cracking.
Solution: This service bulletin provides instructions to re- - -torque the screws and
apply a sealant.
C. Description
The procedures in this service bulletin give the instructions to do the tasks that follow:
- - - 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 is gained to the windshield terminal blocks
- - - a chemical cleaning of the lugs and wires is done
- - - av i s u a li n s p e c t i o ni sd o n et oc h e c kf o rd a m a g e
--- s c r e w s a r e r e --- t o r q u e d
- - - a Humiseal sealant is applied
- - - an operational test of the windshield anti- - -icing system is done
- - - close out.
D. Compliance
Bombardier Inc. highly recommend incorporation of ModSum 4- - -126654 at the
earliest opportunity unless otherwise directed by the operator’s airworthiness
authority.
Transport Canada Airworthiness Directive CF- - -2017- - -18.
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
# 9 3 --- Q --- 0 2 .

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Revision ‘A’ 27 Sep 2017 JR
This service bulletin does not affect Airworthiness Limitations (AWLs) or Damage
T olerance Inspections (DTIs).
F. M a n p o w e r
It will take an estimated 3.00 man- - -hours to complete this service bulletin. The
breakdown of the man- - -hours is shown in the table that follows:
TASK M A N --- H O U R S
J o b S e t --- U p 0.25
Procedure 2.00
T e s t/R T S 0.50
Close- - -Out 0.25
This estimate is for direct labour done by an experienced crew and it does not
include, planning, familiarization, cure tim e, part fabrication, tool acquisition or lost
time.
G. Material - - - Price and Availability
The ModKit(s) required to do this service bulletin is/are listed in the table below:
Kit Number Description
8DK4308- - -001 Drawing Kit- - -Windshield Heater- - -T erminal Block
Mod- - -Application of Sealant to Heater T erminal Screws
Drawing Kit(s) (DKs) listed in the table above are drawings only. No parts will be
supplied.
The part(s) and material(s) required are listed in Paragraph 2.A. The parts required
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. DK parts are to be manufactured and approved locally (refer to
disclaimer in the related text or illustra tion). In some cases, an equivalent to the DK
part may be available from Bombardier under the production part number shown as
reference in Parts Required Per Aircraft.

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If required the related 8DK drawings listed in the T able above can be requested by
writing to the e- - -mail address that follows:
qseriesdwgrequest@aero.bombardier.com
Follow the instructions per All Operator Messages (AOM) 914 (Q100/200/300) or 389
(Q400).
H. T ooling - - - Price and Availability
None
I. Weight and Balance
Not affected
J. Electrical Load Data
Not affected
K. Publications Affected
Aircraft Maintenance Manual PSM 1- - -84- - -2.........................
ModSums Manual PSM 1- - -84- - -12..................................
L. References
Revision ‘A’ of this service bulletin was prepared to the engineering drawings and
related data that follows:
DRAWING SHEET REV
8DK4308 1 A
ModSum 4Q126654 Rev. ‘C’
ModSum 4- - -126654 Rev. ‘C’
PCA 46032 Revision 0 (for internal reference only)
Transport Canada Airworthiness Directive CF- - -2017- - -18

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2. MATERIAL INFORMA TION
A. Parts Required Per Aircraft
(1) The following material(s) are required for the completion of this service bulletin
and may be procured as single items from Bombardier Aerospace Regional
Aircraft or purchased directly from industry sources.
Each consumable product listed in the table below is given its own unique
Product ID Number. The number is used to identify a particular recommended
product, the specifications and the trade names any of which can be used
unless specified otherwise (refer to PSM 1- - -84- - -18 Consumable Products
Manual).
REF ITEM Qty. Per Aircraft Description Remarks
07- - -56 as required COATING, Insulating Varnish, Electrical Humiseal
B. Parts Required to Modify Spares
None
C. Special T ools and Equipment Required
None
D. Existing Parts Accountability
None

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3. ACCOMPLISHMENT INSTRUCTIONS
A . J o b S e t --- U p
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 ACCIDENTALL Y
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 ACCIDENTALL Y 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
W A R N I N G S a n d C A U T I O N S ( r e f e r t o A M M T A S K ’ S 2 4 --- 0 0 --- 0 0 --- 8 6 1 --- 8 0 2 a n d
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) Set wheel chocks in front and behind the landing gear tires.
B. Procedure
(1) Remove the protective cover from the windshield terminal block per AMM T ask
56- - -10- - -01- - -000- - -801.
(2) Remove all six wires from the terminal block. Retain the screws and lock
washers.

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(3) Perform a chemical cleaning on the electrical wires and components per AMM
T ask 20- - -30- - -00- - -110- - -801.
(4) Do a visual inspection of the wiring and components per AMM T ask
20- - -30- - -00- - -210- - -801 and AMM T ask 56- - -10- - -01- - -220- - -801.
(5) Install all six wires using kept or new screws and lock washers and torque screws
as follows: see Figure 1
(a) T orque heater screws at terminals L1 & L2 to 20- - -25 inch pounds.
(b) T orque sensor screws at terminals A, B, C and D to 15- - -20 inch pounds.
(6) Apply Humiseal (07- - -56) to the screw heads of terminal L1 & L2 only per AMM
T ask 20- - -30- - -00- - -390- - -804.
(7) Install the protective cover to the windshield terminal block per AMM T ask
56- - -10- - -01- - -400- - -801.
(8) Do an operational T est of the Pilot Windshield Anti- - -icing System per AMM T ask
30- - -41- - -00- - -710- - -801.
(9) Do an operational T est of the Copilot Windshield and Pilot Side Window
Anti- - -icing System per AMM T ask 30- - -41- - -00- - -710- - -802.
NOTE: If it is not possible to complete all the instructions in this service bulletin
because of the configuration of the aircraft, contact the T echnical Help
Desk by telephone at 416- - -375- - -4000 or email at:
thd.qseries@aero.bombardier .com to get an approved disposition to
complete this service bulletin.

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C. Close Out
(1) Remove all tools and equipment from the work area.
(2) 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.

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Windshield Heater T erminal Block
Figure 1
TORQUE 15- - -20 INCH LBS
TORQUE 20- - -25 INCH LBS
1

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This Page Intentionally Blank
1

### Page 13

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 14

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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