Revision ‘A’ 24 Oct 2011

DHC-8 (DASH 8)

SERVICE BULLETIN 84-52-66

Doors - Machined Handle Shaft - Aft Entry & Aft Service Doors -

Replacement - ModSum 4-113687

This page transmits Revision ‘A’ of Service Bulletin 84-52-66,

pages 1 thru 6, dated: 24 Oct 2011.

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

the Effectivity section is revised to change serial numbers affected

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

bulletin and engineering documentation

the Accomplishment Instructions section is revised to provide correct

Maintenance Manual Task

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 previous issue of Service Bulletin 84-52-66 and replace with

attached.

Previous issues of Service Bulletin 84-52-66:

Initial issue - Pages 1 thru 6 dated 25 Jul 2011

D

S.B. 84-52-66

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JR

SERVICE BULLETIN

Customer

Support

ATA SYSTEM: 5241 NUMBER: 84-52-66

BOMBARDIER AEROSPACE REGIONAL AIRCRAFT CONSIDER THIS

SERVICE BULLETIN TO BE PARTICULARLY SIGNIFICANT AND

URGES OPERATORS TO PROMPTLY EVALUATE THE CONTENTS

SUBJECT: Doors - Machined Handle Shaft - Aft Entry & Aft Service Doors -

Replacement - ModSum 4-113687

1. PLANNING INFORMATION

A. Effectivity

Aircraft Affected:

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

4003 thru 4364.

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: There have been issues reported of door handle loads increasing and one

instance of a door handle jamming on opening. These conditions might be

caused by the pins on the existing handle shaft migrating and causing the

handle to jam.

A jammed handle could prevent the opening of the door.

Solution: This Mod allows for the in-service replacement of the existing aft entry &

aft service door internal handle shaft with the single piece machined

handle shaft.

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

- the existing aft entry & aft service internal door handle shaft is removed and

discarded

- a new aft entry & aft service internal door handle shaft is installed

- a functional test of the aft entry & aft service doors is done

- close out.

D. Compliance

Bombardier Inc. highly recommend that ModSum 4-113687 be incorporated at the

earliest opportunity unless otherwise directed by the operator’s airworthiness

authority.

Transport Canada Airworthiness Directive Pending

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).
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F. Manpower

It will take an estimated 6.75 man-hours (per door) to complete this service bulletin.

The breakdown of the man-hours is shown in the table that follows:

TASK MAN-HOURS

Job Set-Up 0.25

Procedure 6.00

Test / RTS 0.25

Close-Out 0.25

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 obtained from any Bombardier

Aerospace Regional Aircraft authorized parts source. The price and availability will

be quoted at the time of order.

H. Tooling - Price and Availability

None

I. Weight and Balance

None

J. Electrical Load Data

Not affected

K. Publications Affected

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

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

Maintenance Requirement Manual PSM 1-84-7 ....................
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L. References

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

related data that follows:

DRAWING SHEET REV

8DK4169 1 C

ModSum 4Q113687 Rev. ‘G’

ModSum 4-113687 Rev. ‘G’

PCA 41838 Revision 1 (for internal reference only)

Transport Canada Airworthiness Directive Pending

2. MATERIAL INFORMATION

A. Parts Required Per Aircraft

(1) Detailed Parts List:

Quantity

Per Aircraft

Part Number Description Remarks

1 85217916-116 Handle Shaft

1 85217916-115 Handle Shaft

B. Parts Required to Modify Spares

None

C. Special Tools and Equipment Required

None

D. Existing Parts Accountability

None
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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.

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

(4) Set up the work platforms or ladders as required to gain access to the aft entry

& aft service doors. Make sure the work platforms or ladders are electrically

grounded.

B. Procedure

(1) Remove and discard existing internal handle shaft from the aft entry door. Refer

to Maintenance Manual Task 52-12-01-000-802.

(2) Install new internal handle shaft 85217916-115 on the aft entry door. Refer to

Maintenance Manual Task 52-12-01-400-802 and to Figure 1.

(3) Remove and discard existing internal handle shaft from the aft service door.

Refer to Maintenance Manual Task 52-41-01-000-802.

(4) Install new internal handle shaft 85217916-116 on the aft service door. Refer to

Maintenance Manual Task 52-41-01-400-802 and to Figure 1.

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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Aft Entry & Aft Service Doors Location

Figure 1

AFT ENTRY DOOR

AFT SERVICE DOOR

9
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