Gulfstream

TRANSMITTAL SHEET

Transmittal

Page 1 of 2

This sheet transmits Revision 1, dated October 27, 2011, to Gulfstream Service Bulletin (SB) 

200-32-389 dated October 20, 2011, titled Landing Gear - Brake Assembly - Brake Wear Indicator Pin - Detailed Inspection / Modification

Reason for Revision

PLANNING INFORMATION

1. Effectivity

Information is updated adding aircraft serial numbers 241-250.

NOTE is updated advising that all brakes are affected. 

3. Reason

Information updated explaining brake assemblies not called out in original issue 

were found with improperly sized wear indicator pins.

4. Description

Information updated deleting reference to an affected serial number range.

5. Compliance

NOTE is added recommending operators with brakes in excess of 1,500 landings 

to consider SB revision compliance.

7. Manpower

Information updated deleting man-hours to inspect for suspect serial numbers. 

ACCOMPLISHMENT INSTRUCTIONS

Steps 3-5

Information updated deleting reference to Appendix A.

Added note to Figure 3

October 27, 2011
Gulfstream

TRANSMITTAL SHEET

Transmittal

Page 2

Effect of Revision on Prior Accomplishments

This service bulletin revision replaces SB 200-32-389. Aircraft in compliance with the 

original issue of this service bulletin must accomplish this SB revision by inspecting and 

modifying, if necessary, all brake assemblies. Aircraft that have inspected and modified 

all brake assemblies per the instructions of the original issue of this SB require no 

further action. Operators should return the service reply card marked “Previously 

complied with”, stating all brake assemblies have been inspected. 

This is a COMPLETE REISSUE of Gulfstream Service Bulletin 200-32-389.

List of Effective Pages

Previous revisions to service bulletin 200-32-389

None

Page No. Date

1 through 8 October 27, 2011

October 27, 2011
SUBJECT

SERVICE BULLETIN

 

NUMBER 200-32-389 Rev 1 

 

 LANDING GEAR (ATA 32) - BRAKE ASSEMBLY 

- BRAKE WEAR INDICATOR PIN - DETAILED 

INSPECTION / MODIFICATION

 

OCTOBER 27, 2011 
Gulfstream.............................................

SERVICE BULLETIN

Service Bulletin No. 200-32-389

Page 1 of 8

LANDING GEAR - BRAKE ASSEMBLY - BRAKE WEAR INDICATOR PIN - DETAILED 

INSPECTION / MODIFICATION

PLANNING INFORMATION

202

1. Effectivity

Aircraft serial numbers 004-250

NOTE: All brake assemblies installed on aircraft serial numbers 004-250 and any 

spare units must be inspected. 

2. Concurrent Requirement

None

3. Reason

Recently, two G200 operators experienced degraded brake performance after

landing. Subsequent investigation revealed that in both cases the brake wear pins

showed remaining life, but the brakes were worn to the minimum pad thickness as

specified in the brake Meggitt Aircraft Braking Systems Component Maintenance

Manual (CMM). This deficiency has been traced to wear indicator pins that were

improperly sized during the brake overhaul process.

After release of the original issue of this SB, brake assemblies not called out in 

Appendix A were also found to have improperly sized brake wear indicator pins. 

4. Description

This service bulletin revision provides instructions to inspect all main landing gear 

(MLG) brake assemblies, P/N 4AS2550003-501/-503/-505 (5012889/-1/-2), in the 

above aircraft effectivity for properly sized brake wear indicator pins. Instructions are 

also provided to measure and cut (if necessary) the pin to the manufacturer’s specified 

length as instructed in this service bulletin. 

5. Compliance

Compliance with this service bulletin is mandatory at the next suitable planned

maintenance period not to exceed December 19, 2011.

NOTE: Operators with brakes having in excess of 1,500 landings should consider 

compliance with this SB revision at the earliest convenient opportunity.

October 20, 2011

Revision 1 October 27, 2011
Gulfstream

SERVICE BULLETIN

Service Bulletin No. 200-32-389

Page 2 of 8

6. Approval

This service bulletin contains no modification information that revises the approved 

configuration and therefore does not require regulatory agency approval.

7. Manpower

The following information is for planning purposes only:

Estimated man-hours: 4 hours to jack aircraft

2 hours to remove and install each MLG wheel

1 hour to measure and cut wear indicator pin (per brake assy)

8. Weight and Balance

None

9. Electrical Load Data

No Change

10. Software Accomplishment Summary

None

11. References

G200 Aircraft Maintenance Manual (AMM), Chapters 07, 12, 20 and 32

Meggitt Aircraft Braking Systems Brake Component Maintenance Manual (CMM)

12. Other Publications Affected

AMM, Chapter 32

13. Interchangeability or Intermixability of Parts

None

October 20, 2011

Revision 1 October 27, 2011
Gulfstream.............................................

SERVICE BULLETIN

Service Bulletin No. 200-32-389

Page 3 of 8

MATERIAL INFORMATION

1. Material - Price and Availability

The parts required to accomplish this service bulletin are available by contacting

Spare Parts Sales at 800-810-GULF (4853) or 912-965-4178.

2. Warranty Information

This service bulletin will be accomplished at no charge if performed at a Gulfstream

G200 Authorized Warranty Repair Facility within the recommended compliance time

stated in this document. If this service bulletin is performed at other than a Gulfstream

G200 Authorized Warranty Repair Facility, the labor will be an owner responsibility.

3. Material Necessary for Each Aircraft

A. Material to be Procured:

B. Materials Supplied by the Operator:

None

4. Reidentified Parts

None

5. Special Tooling

Torque wrench, 40-200 in.lbs. GSE5100721 (QC1R200) or equivalent

Torque wrench, 100-1000 in.lbs. GSE5100722 (See GSE Catalog) or equivalent

New P/N Keyword Old P/N Qty

MS24665-90 Cotter Pin A/R

October 20, 2011

Revision 1 October 27, 2011
Gulfstream

SERVICE BULLETIN

Service Bulletin No. 200-32-389

Page 4 of 8

ACCOMPLISHMENT INSTRUCTIONS

CAUTION: PROTECT WIRE BUNDLES, CONNECTORS AND SURROUNDING 

STRUCTURE DURING ANY MAINTENANCE PROCEDURES FROM 

SHAVINGS, DEBRIS AND CONTAMINATION. MAINTAIN A PROPERLY 

CLEANED WORK AREA THROUGHOUT THE PROCEDURE TO ENSURE THE 

INTEGRITY OF THE AFFECTED COMPONENT/SYSTEM. VISUALLY 

INSPECT WORK AREA USING ADDITIONAL LIGHT AS NECESSARY TO 

VERIFY ABSENCE OF ANY DEBRIS PRIOR TO COMPLETION OF 

PROCEDURE. FAILURE TO COMPLY MAY RESULT IN DAMAGE TO 

COMPONENTS AND/OR SYSTEMS.

1. Prepare aircraft for safe maintenance. Refer to Aircraft Maintenance Manual, 

Chapter 20.

CAUTION: MAKE SURE ELECTRICAL POWER IS DISCONNECTED FROM AIRCRAFT. 

FAILURE TO COMPLY MAY RESULT IN INJURY TO PERSONNEL AND/OR 

DAMAGE TO AIRCRAFT.

2. Disconnect external electrical power from aircraft. Refer to Aircraft Maintenance 

Manual, Chapter 12.

3. Jack aircraft. Refer to AMM, Chapter 07. 

4. Remove MLG wheels as necessary. Refer to AMM, Chapter 32. 

5. Remove brake wear indicator pin by removing cotter pin from the cap screw. Refer to 

Figure 2. 

6. Measure and cut indicator pin to 1.41 inches (35.8 mm) ± 0.020 (± .5 mm). Refer to 

Figure 3. 

NOTE: If pin is within limits shown, no cutting is required. 

7. Break sharp edges. 

8. Reinstall wear indicator pin and secure with new cotter pin, P/M MS24665-90. Refer 

to Figure 2. 

9. Perform Steps 4 through 8 for each remaining brake assembly. 

10. Perform Normal Brake Wear Inspection per AMM, Chapter 32. 

11. Replace any brakes that fail brake wear inspection. Refer to AMM, Chapter 32.

12. Reinstall all removed wheel assemblies. Refer to AMM, Chapter 32. 

October 20, 2011

Revision 1 October 27, 2011
Gulfstream

SERVICE BULLETIN

Service Bulletin No. 200-32-389

Page 5 of 8

13. Remove aircraft from jacks. Refer to AMM, Chapter 07. 

14. Ensure work area is clean and clear of foreign objects (FOD).

15. Record compliance with this service bulletin revision in the aircraft’s permanent 

maintenance records and return aircraft to flight status.

16. Report compliance with this service bulletin revision to Gulfstream CMP via electronic 

transmittal or fill out and fax the attached service reply card.

If technical assistance is required, contact your area Gulfstream Field Service 

Representative or call Gulfstream Customer Support at 800-810-GULF (4853) or 

912-965-4178 (fax 912-965-4184).

October 20, 2011

Revision 1 October 27, 2011
Gulfstream

SERVICE BULLETIN

Service Bulletin No. 200-32-389

Page 6 of 8

HEAT SHIELD

Brake Wear Indicator Pin Installation 

Figure 1

October 20, 2011

Revision 1 October 27, 2011

WEAR INDICATOR PIN PRESSURE PLATE
Gulfstream

SERVICE BULLETIN

Service Bulletin No. 200-32-389

Page 7 of 8

Break Wear Indicator Pin Removal And Installation

Figure 2

October 20, 2011

Revision 1 October 27, 2011
Gulfstream

SERVICE BULLETIN

Service Bulletin No. 200-32-389

Page 8 of 8

CUT PIN TO

1.41 INCHES (35.8 MM) ± 0.020 (.5 MM)

WEAR INDICATOR

PIN, P/N 5010453-1

Brake Wear Indicator Pin Length - Adjustment

Figure 3

October 20, 2011

Revision 1 October 27, 2011

NOTE: THE DIMENSION IS TAKEN FROM THE FRONT 

OF THE SECURING HOLE IN THE WEAR 

INDICATOR PIN

NOTE: ALL BRAKE ASSEMBLIES MUST BE INSPECTED. NO AIRCRAFT

(004-250) OR BRAKE ASSEMBLIES ARE EXEMPT FROM THE

REQUIREMENTS CALLED OUT IN THIS SB EFFECTIVITY
GULFSTREAM G200 

SERVICE BULLETIN NO. 200-32-389 REV 1 

SERVICE REPLY CARD

Service Bulletin prepared by Gulfstream Aerospace, 500 Gulfstream Road, P.O. Box 2206, Savannah, Georgia 

31402-2206, USA. © 2011 Gulfstream Aerospace. All rights reserved, including the right to reproduce this publication. 

No part may be reproduced, stored in any retrieval system, or transmitted in any part or form or by any means, 

electronic, photocopying, microfilm, microfiche, mechanical, or otherwise, without prior written permission of 

Gulfstream Aerospace. This technical data is controlled under the Export Administration Regulations by General 

License TSU. It may not be transferred to a third party without the prior written approval of the U.S. Department of 

Commerce. 

PLEASE FAX THIS PAGE TO GULFSTREAM AEROSPACE CMP 

FAX # 800-944-1775 or 912-963-0265.

THE FOLLOWING SERVICE BULLETIN HAS BEEN COMPLIED WITH: 

SB CMP NUMBER A/C AIRCRAFT TYPE COMPLIANCE DATE

983891 Galaxy/Gulfstream G200 

AIRCRAFT HOURS: AIRCRAFT LANDINGS: 

PREVIOUSLY COMPLIED 

WITH: DATE: 

NOT APPLICABLE: DATE: 

 

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NUMBER 

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