D

S.B. 84-32-118

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08 Apr 2014

NB

SERVICE BULLETIN

Customer

Support

ATA SYSTEM: 3200 NUMBER: 84-32-118

BOMBARDIER AEROSPACE REGIONAL AIRCRAFT CONSIDER THIS

SERVICE BULLETIN TO BE PARTICULARLY SIGNIFICANT AND

URGE OPERATORS TO PROMPTLY EVALUATE THE CONTENTS

SUBJECT: Landing Gear, RH Nacelle - Removal of Parking Brake Hand Pump

Lever - ModSum 4-113803

1. PLANNING INFORMATION

A. Effectivity

Aircraft Affected:

In-Service: DHC-8 Aircraft Models 401 and 402 Serial Numbers 4001,

4003 thru 4419.

NOTE: This Service Bulletin does not apply to aircraft

previously reworked by Service Bulletin 84-32-99

(ModSum 4-113723).

Production: ModSum 4-113723 will be installed before delivery on

applicable DHC-8 Aircraft at Serial Number 4420 and

subsequent.
SERVICE BULLETIN 84-32-118

S.B. 84-32-118

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08 Apr 2014

NB

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

B. Reason

Problem: An operator had reported an incident which involved the migration of the

main landing gear parking brake hand pump lever resulting in the damage

of the nacelle side panels.

During the incident, the parking brake pump lever located in the RH nacelle

had dislodged from its mounting bracket and migrated down from the

upper retaining collar and fell over inside the nacelle.

Due to the unpredictable nature of an object migrating from its mounting

position, the possibility exists that the pump lever could lodge itself into a

position that would prevent the extension of the MLG or prevent the nacelle

doors from opening or become runway F.O.D.

Cause: The quick release pin used to secure the pump lever installation may not

have been correctly installed, compromising the installation. If the quick

release pin is not fully engaged, the potential exists for the pin to migrate

out, disengaging, and allowing the pump lever to become dislodged from

its installation position.

Solution: ModSum 4-113803 removes the existing parking brake hand pump lever

from the RH nacelle.

ModSum 4-113804 provides the option to relocate the parking brake hand

pump lever to its new productionized position in the nose compartment of

the aircraft.
SERVICE BULLETIN 84-32-118

S.B. 84-32-118

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08 Apr 2014

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C. Description

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

follow:

- all aircraft electrical power systems are selected to OFF

- the nose landing gear lock is engaged

- the main landing gear lock pins are installed through each main gear and main gear

door mechanism

- work platforms or ladders are set up and properly grounded

- quick release pin is depressed and parking brake hand pump lever is removed from

existing RH nacelle location and tagged

- quick release pin assembly is removed and discarded

- existing rivet hole exposed surface is treated with alodine, primed with an epoxy

chromate primer and existing rivet hole is then plugged as required

- neoprene pad from around hole in flange of existing bracket assembly is removed

and discarded

- quick release pin hole in the existing bracket 82974258 is opened from 0.253 to

0.263 inch diameter, the existing hole exposed surface is treated with alodine,

primed with an epoxy chromate primer and existing hole is then plugged as

required

- existing nacelle cushion clamp assembly is cut off and sharp edges are deburred

(mounting hardware is left in place)

- close out.

D. Compliance

Bombardier Inc. highly recommends that ModSum 4-113803 be incorporated at

the earliest opportunity unless otherwise directed by the operator’s airworthiness

authority.

A Transport Canada Airworthiness Directive is pending.
SERVICE BULLETIN 84-32-118

S.B. 84-32-118

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08 Apr 2014

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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 2.5 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 0.50

Procedure 1.50

Test / RTS 0.00

Close-Out 0.50

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 part(s) and material(s) 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. DK parts are to be manufactured and approved locally (refer to disclaimer

in the related text or illustration). 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.

H. Tooling - Price and Availability

None
SERVICE BULLETIN 84-32-118

S.B. 84-32-118

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08 Apr 2014

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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 -1.09 +469.83 +0.51

J. Electrical Load Data

Not affected

K. Publications Affected

Maintenance Manual PSM 1-84-2 ................................

Dash 8 Illustrated Parts Catalogue PSM 1-84-4 ....................

ModSums Manual PSM 1-84-12 ..................................

Weight and Balance Manual (Imperial) PSM 1-84-8 ................

Weight and Balance Manual (Metric) PSM 1-84-8M ..................

L. References

The initial issue of this service bulletin was prepared to the engineering drawings

and related data that follows:

DRAWING SHEET REV

8DK4219 1 --

8Z0376 1 --

ModSum 4-113803 Rev. ‘A’

ModSum 4Q113803 Rev. ‘A’

PCA 43323 Revision 3 (for internal reference only)

Transport Canada Airworthiness Directive Pending
SERVICE BULLETIN 84-32-118

S.B. 84-32-118

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08 Apr 2014

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2. MATERIAL INFORMATION

A. Parts Required Per Aircraft

(1) Modification Kit 8DK4219-001

(2) Detailed Kit Content:

Quantity Per Kit

-001

Part Number Description Remarks

2 MS20470A8-7S Rivet See NOTE 1 below

2 B0205016AD4-4S Rivet See NOTE 1 below

REF 8Z0376 Retrofit Drawing only

See NOTE 2 below

NOTE 1: Quantity increased to account for losses. Actual quantity required is 1.

NOTE 2: This service bulletin is self-contained (illustrated). No drawings will be

supplied.

(3) In addition to the above part(s), 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.

Addresses of manufacturers and suppliers not shown below are listed in

either Maintenance Manual Chapter 20 or in Structural Repair Manual Chapter

51 or, for 400 Series Aircraft, in Consumable Products Manual PSM 1-84-18.

Product ID No. Qty. Per Aircraft Description Specifications

07-02 1/4 Pint Epoxy Primer DHMS C4.01 Type 2

07-08 1/4 Pint Polyurethane

Enamel

DHMS C4.04

07-21 1/2 Ounce Alodine MIL-C-5541
SERVICE BULLETIN 84-32-118

S.B. 84-32-118

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08 Apr 2014

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NOTE: Refer to CPM PSM 1-84-18 for the list of approved consumable products

under each Product ID No., any of which can be used unless a note

states otherwise.

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 TASKs 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) Set wheel chocks in front and behind the landing gear tires.

(5) Set up the work platforms or ladders as required to gain access to the right

hand nacelle (refer to Figure 1). Make sure the work platforms or ladders are

electrically grounded.

B. Procedure

(1) Remove existing parking brake pump lever P/N 72900011-001 or P/N

82900002-001 as follows (refer to Figure 2):

(a) Depress existing quick release pin assembly and remove parking brake

pump lever P/N 72900011-001 or P/N 82900002-001 from existing bracket

82974258. Retain and tag the parking brake lever (Refer to AMM TASK

20-00-01-910-801).
SERVICE BULLETIN 84-32-118

S.B. 84-32-118

Page 8 of 12

08 Apr 2014

NB

NOTE: The operator has the option to re-install the parking brake pump

lever on the aircraft per Service Bulletin 84-32-119 (ModSum

4-113804). There is no requirement to carry the lever onboard the

aircraft. However, Bombardier highly recommends to re-install the

lever on the aircraft per SB 84-32-119, and that the lever be carried

at all times.

NOTE: If the lever is not re-installed, it is the responsibility of the operator

to relocate the parking brake pump lever P/N 72900011-001 or

82900002-001 to ground support equipment for servicing the

parking brake system per AMM TASK 12-10-32-863-801.

(b) Carefully remove existing rivet attaching quick release pin assembly

55440-4R15DL7C-4 from M/C frame aft uplock 85414452 and discard.

(c) Deburr existing rivet hole, treat exposed surfaces with Alodine 1200S or

equivalent, prime treated areas with epoxy chromate primer and plug hole

with rivet B0205016AD4-4S (refer to SRM TASK 51-42-35-02-01).

(d) Remove and discard neoprene pad installed to area around hole in flange on

existing bracket 82974258.

NOTE: Do not remove existing bracket 82974258.

(e) Drill existing quick release pin hole on flange to 0.253/ 0.263 inch diameter.

Deburr existing quick release pin hole, treat exposed surfaces with Alodine

1200S or equivalent, prime treated areas with epoxy chromate primer. Plug

0.253/ 0.263 inch diameter hole with rivet MS20470A8-5S (refer to SRM TASK

51-42-05-00-01).

(2) Carefully cut off existing nacelle cushion clamp assembly M85449/2-18 and

deburr sharp edges of remnant pieces of cushion clamp assembly (leave the

original mounting hardware in place). Make sure the edge of the stiffener of M/C

frame 85414452 is protected during the cutting operation (refer to Figure 2).
SERVICE BULLETIN 84-32-118

S.B. 84-32-118

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08 Apr 2014

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C. Close Out

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

(2) On incorporation of this ModSum/Modification, add the weight and balance data

shown in Section I of this service bulletin to the Weight and Balance Manual

PSM 1-84-8. Under ‘Description of Change’ enter “ModSum 4-113723

incorporated.”

(3) 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 84-32-118

S.B. 84-32-118

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08 Apr 2014

NB

LEVER REMOVAL

FROM RH NACELLE

RH Nacelle MLG Parking Brake Pump Lever Removal

Figure 1

AREA OF RETROFIT
SERVICE BULLETIN 84-32-118

S.B. 84-32-118

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08 Apr 2014

NB

LEVER

PUMP

72900011-001 OR

82900002-001

CLAMP

M85449/2-18

BRACKET

82974258

PARKING BRAKE

HAND PUMP

M/C FRAME AFT

UPLOCK

85414452

QUICK RELEASE

PIN ASSEMBLY

55440-4R15DL7C-4

EXISTING

LOCATION

B0205016AD4-4S

RIVET (PLUG)

RIVET (PLUG)

MS20470A8-5S

OPEN HOLE TO

0.253/0.263 INCH

DIAMETER

RIVET

VIEW ON ARROW

LOOKING FORWARD IN RH NACELLE

REMOVE EXISTING NEOPRENE

PAD AROUND

HOLE IN FLANGE

CUSHIONED

M/C FRAME

85414452

VIEW ON ARROW

CUT LINE AT

RADIUS 2 PL

PUMP

CUT AWAY CLAMP

AND DISCARD

MAKE SURE THE EDGE OF STIFFENER

IS PROTECTED DURING CUTTING

OPERATION B

B

RH Nacelle MLG Parking Brake Pump Lever Removal

Figure 2

REMOVE AND TAG PARKING BRAKE HAND

PUMP LEVER.

THE OPERATOR IS RESPONSIBLE TO STOW

THE PARKING BRAKE PUMP LEVER IN THE

GROUND SERVICING EQUIPMENT PER AMM

TASK 12-10-32-863-801.

PARKING BRAKE HAND PUMP LEVER P/N

72900011 AND 82900002 ARE EQUIVALENT.

NOTES:

A

CLAMP IS CUT OFF

AND SHARP EDGES

ARE DEBURRED

MOUNTING HARDWARE REMAINS IN

PLACE

1 2 3

1

3

2

(BRACKET REMAINS

IN PLACE)
SERVICE BULLETIN 84-32-118

S.B. 84-32-118

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This Page Intentionally Blank
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