D

S.B. 84 ---24 ---45

Page 1 of 22

13 Jan 2011

JR

SERVICE BULLETIN

Customer

Support

ATA SYSTEM: 2421 NUMBER: 84 ---24 ---45

BOMBARDIER AEROSPACE REGIONAL AIRCRAFT CONSIDER THIS

SERVICE BULLETIN TO BE PARTICULARLY SIGNIFICANT AND

URGES OPERATORS TO PROMPTLY EVALUATE THE CONTENTS

SUBJECT: Electrical Power --- Modification of AC Generators --- Special

Inspection/Rectification --- ModSum 4 ---113691

1. PLANNING INFORMATION

A. Effectivity

Aircraft Affected:

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

thru 4338 with AC Generators P/N 1152218 ---4 & 1152218 ---5.

Production: ModSum 4 ---113691 will be installed before delivery on

applicable DHC ---8 Aircraft at Serial Number 4339 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.
SERVICE BULLETIN 84 ---24 ---45

S.B. 84 ---24 ---45

Page 2 of 22

13 Jan 2011

JR

Spares Affected:

The following is a list of spares affected by this change. Review spares and

procurement systems to determine the existence of any listed parts.

Part Number Description

1152218 ---5 AC Generator

1152218 ---4 AC Generator

1152218 ---3 AC Generator (see Note below)

NOTE: AC Generators P/N P/N 1152218 ---3 are not subject to the instructions of

this service bulletin. However, upon the return of P/N 1152218 ---3 for

overhaul or repair, it will be upgraded to P/N 1152218 ---6. Upon

installation of AC Generator P/N 1152218 ---6, it is not permissible to

replace P/N 1152218 ---6 with AC Generator P/N’s 1152218 ---5,

1152218 ---4 or 1152218 ---3.

B. Reason

Problem: Honeywell has determined that the Rotor Band in some AC Generators

may fail due to an incomplete fusion in the weld joint. This defect is visually

undetectable and the Rotor Band must be x --- rayed by Honeywell to

ensure conformance. X ---Rayed Rotor Bands will be serialized.

Solution: Re ---identification of the AC Generator will be performed to provide

verification that the Rotor Bands used in the assembly of the Generator

have been certified to have acceptable welds and the Lower Crossover

improvement has been incorporated.

C. Description

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

follow:

NOTE: Do not remove the AC Generators from service until contacted by

Honeywell.

--- Once returned to Honeywell, the AC Generators will be disassembled and the

Rotor Bands removed from the Rotor Assembly and x --- rayed. Rotor Bands

which fail the x --- ray inspection will be replaced, and the Rotor Assemblies will

be rebuilt using Rotor Bands which have passed the x --- ray inspection

--- Once rebuilt, the AC Generators will be tested and recertified. The Modification

Plate will be marked to indicate incorporation of this Service Bulletin
SERVICE BULLETIN 84 ---24 ---45

S.B. 84 ---24 ---45

Page 3 of 22

13 Jan 2011

JR

--- an operational test of the AC Variable Frequency Generation system is done

--- close out.

D. Compliance

Bombardier Inc. recommends incorporation of this service bulletin at the earliest

opportunity unless otherwise directed by the operator’s airworthiness authority.

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 1.45 man ---hours to remove the generator from the aircraft.

Refer to enclosed Honeywell Service Bulletin 1152218 ---24 ---118 for hours required

to modify generator.

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

TASK MAN ---HOURS

Job Set ---Up 0.15

Procedure 1.00

Test / RTS 0.15

Close ---Out 0.15

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

Refer to enclosed Honeywell Service Bulletin 1152218 ---24 ---118.

H. Tooling --- Price and Availability

None
SERVICE BULLETIN 84 ---24 ---45

S.B. 84 ---24 ---45

Page 4 of 22

13 Jan 2011

JR

I. Weight and Balance

None

J. Electrical Load Data

Not affected

K. Publications Affected

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

L. References

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

and related data that follows:

ModSum 4Q113691 Rev. B

ModSum 4 ---113691 Rev. C

PCA 43250 Revision 0 (for internal reference only)

Honeywell Service Bulletin 1152218 ---24 ---118 Revision 1 dated 20 Nov 2010

2. MATERIAL INFORMATION

A. Parts Required Per Aircraft

Refer to enclosed Honeywell Service Bulletin 1152218 ---24 ---118.

B. Parts Required to Modify Spares

Refer to enclosed Honeywell Service Bulletin 1152218 ---24 ---118.

C. Special Tools and Equipment Required

None

D. Existing Parts Accountability

None
SERVICE BULLETIN 84 ---24 ---45

S.B. 84 ---24 ---45

Page 5 of 22

13 Jan 2011

JR

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 PSM ... Chapters 12 and 24).

(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 AC

Generators. Make sure the work platforms or ladders are electrically grounded.

B. Procedure

(1) Do not remove functional AC Generators from service until contacted by

Honeywell.

(2) Once contacted by Honeywell inspect aircraft and spares for AC Generators P/N

1152218 ---4 & 1152218 ---5 Series 1 and specific 1152218 ---5 Series 2 serial

numbers listed in Table 1 of enclosed Honeywell Service Bulletin

1152218 ---24 ---118.

(3) Remove AC Generators P/N 1152218 ---4 & 1152218 ---5 Series 1 and specific

1152218 ---5 Series 2 serial numbers listed in Table 1 of enclosed Honeywell

Service Bulletin 1152218 ---24 ---118 from aircraft or spares depot. Refer to

Maintenance Manual Task 24 ---21 ---01 ---000 ---801.

(4) Return AC generator to Honeywell. Refer to enclosed Honeywell Service Bulletin

1152218 ---24 ---118 for instructions.

(5) Once repaired AC generator have been returned to operator, install generator

per Maintenance Manual Task 24 ---21 ---01 ---400 ---801.

NOTE: Upon installation of AC Generator P/N 1152218 ---6, it is not permissible to

replace P/N 1152218 ---6 with AC Generator P/N’s 1152218 ---5,

1152218 ---4 or 1152218 ---3.

C. Close Out

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

(2) On completion of this service bulletin, make the following entry in the

appropriate logbooks: “Service Bulletin 84 ---24 ---45 {Electrical Power ---

Modification of AC Generators --- Special Inspection/Rectification}

accomplished.”
SERVICE BULLETIN 84 ---24 ---45

S.B. 84 ---24 ---45

Page 6 of 22

13 Jan 2011

JR
SERVICE BULLETIN 84 ---24 ---45

S.B. 84 ---24 ---45

Page 7 of 22

13 Jan 2011

JR
SERVICE BULLETIN 84 ---24 ---45

S.B. 84 ---24 ---45

Page 8 of 22

13 Jan 2011

JR
SERVICE BULLETIN 84 ---24 ---45

S.B. 84 ---24 ---45

Page 9 of 22

13 Jan 2011

JR
SERVICE BULLETIN 84 ---24 ---45

S.B. 84 ---24 ---45

Page 10 of 22

13 Jan 2011

JR
SERVICE BULLETIN 84 ---24 ---45

S.B. 84 ---24 ---45

Page 11 of 22

13 Jan 2011

JR
SERVICE BULLETIN 84 ---24 ---45

S.B. 84 ---24 ---45

Page 12 of 22

13 Jan 2011

JR
SERVICE BULLETIN 84 ---24 ---45

S.B. 84 ---24 ---45

Page 13 of 22

13 Jan 2011

JR
SERVICE BULLETIN 84 ---24 ---45

S.B. 84 ---24 ---45

Page 14 of 22

13 Jan 2011

JR
SERVICE BULLETIN 84 ---24 ---45

S.B. 84 ---24 ---45

Page 15 of 22

13 Jan 2011

JR
SERVICE BULLETIN 84 ---24 ---45

S.B. 84 ---24 ---45

Page 16 of 22

13 Jan 2011

JR
SERVICE BULLETIN 84 ---24 ---45

S.B. 84 ---24 ---45

Page 17 of 22

13 Jan 2011

JR
SERVICE BULLETIN 84 ---24 ---45

S.B. 84 ---24 ---45

Page 18 of 22

13 Jan 2011

JR
SERVICE BULLETIN 84 ---24 ---45

S.B. 84 ---24 ---45

Page 19 of 22

13 Jan 2011

JR
SERVICE BULLETIN 84 ---24 ---45

S.B. 84 ---24 ---45

Page 20 of 22

13 Jan 2011

JR
SERVICE BULLETIN 84 ---24 ---45

S.B. 84 ---24 ---45

Page 21 of 22

13 Jan 2011

JR
SERVICE BULLETIN 84 ---24 ---45

S.B. 84 ---24 ---45

Page 22 of 22

13 Jan 2011

JR

This Page Intentionally Blank

1
Jan 2009

SERVICE BULLETIN (SB) --- RECORD OF INCORPORATION

--- Q SERIES DASH 8 AIRCRAFT

To: Partner Data Co ---Ordinator (Toronto), Bombardier Aerospace Commercial Aircraft

Phone: (1) 416 375 3534 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