LIST OF EFFECTIVE PAGES

The effective pages to this Service Bulletin are as follows:

Page Revision Number Revision Date

Bulletin

1 Oct.25/12

2 Oct.25/12

3 Oct.25/12

4 Oct.25/12

5 Oct.25/12

6 Oct.25/12

Appendix 1

1 Oct.25/12

Appendix 2

1 Oct.25/12

Printed in Great Britain

RB.211−79−AH031

Transmittal - Page 2
1. Planning Information

A. Effectivity

Airbus A380

RB211 TRENT 970-84 Engines

RB211 TRENT 972-84 Engines

B. Reason

Damage to the oil baffle seals in the Trent 900 Fuel Oil Heat Exchanger (FOHE)

can lead to liberation of elastomeric sealing material sections into the engine

oil system, Leading to oil flow restriction.

The condition can then result in significant degradation of the engine oil

system performance. Operational disruption has occurred as a result of this

condition.

As part of the ongoing service management, it is necessary to return the

current standard of FOHE (Part Number 47111-1241) before it reaches 5000 engine

flying hours since last unit overhaul or since new (for units not previously

overhauled) for seal replacement in accordance with Component Maintenance

Manual (CMM) 79-21-12, Revision 2 (or above) to minimise the potential for

operational disruption.

C. Description

This Non-Modification Service Bulletin (NMSB) instructs a periodic replacement

of the FOHE.

The accomplishment instructions contained in this NMSB instruct the removal and

the return of FOHE units to the vendor to have their baffle seals replaced in

accordance with CMM 79-21-12, Revision 2 (or above) before 5000 engine flying

hours since last unit overhaul or since new (for units not previously

overhauled).

Accomplishment of this NMSB must be recorded in the engine/module log book.

Inform your assigned Rolls-Royce Service Representative of NMSB accomplishment

within 10 working days of NMSB completion using Appendix 2.

D. Compliance

ALERT

FUEL OIL HEAT EXCHANGER (FOHE) INSPECTION - NON-MODIFICATION SERVICE BULLETIN -

MOD.79-AH031

Printed in Great Britain

RB.211−79−AH031

Page 1 of 6

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The actions described in section 3. Accomplishment Instructions of this

Non-Modification Service Bulletin (NMSB) are to be completed as follows:

(1) On-wing (refer to Appendix 1 for vendor details)

(a) Carry out FOHE removal in accordance with 3.A. Accomplishment

Instructions prior to the following:

(i) FOHE Time Since New (TSN) reaches 5000 hours

(ii) FOHE Time Since Overhaul (TSO) reaches 5000 hours

(b) Any FOHE in service above 4500 hours TSN or 4500 hours TSO at the date

of issue of this NMSB, must be removed within 500 hours.

(c) Do not install an FOHE unless it has completed less than 5000 hours

TSN or 5000 hours TSO (in accordance with CMM 79-21-12 Revision 2 (or

above)).

(2) In-shop (refer to Appendix 1 for vendor details)

(a) Carry out FOHE removal in accordance with 3.B. Accomplishment

Instructions prior to the following:

(i) FOHE Time Since New (TSN) reaches 5000 hours

(ii) FOHE Time Since Overhaul (TSO) reaches 5000 hours

(b) Do not install an FOHE unless it has completed less than 5000 hours

TSN or 5000 hours TSO (in accordance with CMM 79-21-12 Revision 2 (or

above)).

This NMSB is anticipated to be the subject of EASA Airworthiness Directive.

E. Approval

The technical content of this Non-Modification Service Bulletin was approved

under the authority of Design Organisation Approval EASA.21J.035 on Oct.24/12.

F. Manpower

(1) Off-wing

Time to replace FOHE

4 man-hours

Printed in Great Britain

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(2) On-Wing

(a) Time to gain access

1 man-hour

(b) Time to replace FOHE

4 man-hours

(c) Time to restore to serviceable condition

1 man-hour

(d) Time for Ground Run

4 man-hours

G. References

(1) Airbus A380 Aircraft Maintenance Manual:

(a) 71-13-00, Maintenance practices - Open/Close the fan cowl doors.

(b) 79-22-41, Removal/Installation - Remove/Install the Fuel/Oil Heat

Exchanger.

(2) Rolls-Royce Trent 900 Engine Manual:

(a) Task 72-00-34-050-801 Remove the Accessories and Components on the LP

Compressor Case.

(b) Task 72-00-34-450-801 Install the Accessories and Components on the LP

Compressor Case.

(3) Component Maintenance Manual 79-21-12

Printed in Great Britain

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2. Material Information

A. Parts that will be required to accomplish this NMSB:

EIPC No. QTY PART TITLE PART No.

79-21-11, 01-030 1 Fuel/Oil Heat Exchanger

(FOHE)

47111-1241

B. Expendable parts:

EIPC No. QTY PART TITLE PART No.

73-11-13, 01-080 1 Fuel filter element CA02726A

73-11-47, 04-116 1 Ring AS43013-134

73-11-47, 05-108 1 Ring AS43013-134

73-34-11, 01-046 1 Ring, sealing, toroidal

12.37mm I/D x 2.62mm

AS43013-112

73-34-11, 01-048 1 Ring, sealing, toroidal

13.94mm I/D x 2.62mm

AS43013-113

79-21-11, 02-058 1 Ring, sealing, cap,

filter

26121-8649

79-21-11, 02-068 1 Ring, sealing,

drain plug, fuel

26121-8637

79-21-11, 02-110 1 Ring, sealing,

drain plug, oil

26121-7708

79-33-11, 01-026 2 Ring, sealing, toroidal

9.19mm I/D x 2.62mm

AS43013-110

79-34-15, 01-216 2 Ring, sealing, toroidal

9.19mm I/D x 2.62mm

AS43013-110

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3. Accomplishment instructions

A. On-Wing only

WARNING: YOU MUST BE CAREFUL WHEN YOU WORK ON THE ENGINE AFTER THE ENGINE IS

SHUTDOWN. THE ENGINE CAN STAY HOT FOR ALMOST ONE HOUR.

WARNING: YOU MUST NOT TOUCH HOT PARTS WITHOUT APPLICABLE GLOVES. HOT PARTS CAN

CAUSE INJURY. IF YOU GET AN INJURY, PUT IT IN COLD WATER FOR 10 MINUTES.

THEN GET MEDICAL AID.

WARNING: YOU MUST MAKE THE THRUST REVERSER UNSERVICEABLE (INSTALL AND SAFETY THE

INHIBITION DEVICE) BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER.

IF YOU DO NOT INSTALL AND SAFETY THE INHIBITION DEVICE, THERE IS A RISK

THAT THE THRUST REVERSER CAN OPERATE ACCIDENTALLY. THIS CAN CAUSE

INJURY TO PERSON AND/OR DAMAGE TO THE EQUIPMENT.

CAUTION: IN ORDER TO REDUCE THE POTENTIAL FOR MULTIPLE ENGINE IN FLIGHT SHUTDOWN,

POWER LOSS OR OTHER ANOMALIES DUE TO MAINTENANCE ERROR, ROLLS-ROYCE

RECOMMENDS THAT OPERATORS AVOID PERFORMING MAINTENANCE ON MULTIPLE

ENGINES INSTALLED ON THE SAME AIRCRAFT AT THE SAME TIME. IF IT IS NOT

POSSIBLE TO AVOID MAINTENANCE ON MORE THAN ONE ENGINE AT THE SAME TIME,

ROLLS-ROYCE RECOMMENDS THAT ADDITIONAL CONTROLS ARE APPLIED IN ORDER TO

ENSURE THAT MAINTENANCE TASKS HAVE BEEN COMPLETED AS DEFINED.

MAINTENANCE GUIDELINES SHOULD BE REVISED, WHERE POSSIBLE, TO PROMOTE

THIS RECOMMENDATION.

(1) Open the fan cowl doors in accordance with Aircraft Maintenance Manual

(AMM) 71-13-00, Maintenance Practices.

(2) Remove the FOHE unit in accordance with AMM 79-22-41,

Removal/Installation.

(3) Install a replacement FOHE unit, in accordance with AMM 79-22-41,

Removal/Installation, which has completed less than 5000 hours TSN or 5000

hours TSO (in accordance with CMM 79-21-12 Revision 2 (or above)).

(4) Close up:

(a) Make sure that the work area is clean and clear of tools and other

items.

(b) Close the fan cowl doors in accordance with AMM 71-13-00, Maintenance

Practices.

B. In-shop only

NOTE: This procedure assumes that the FOHE is accessible and that the fuel

system has been drained.

Printed in Great Britain

RB.211−79−AH031

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(1) Remove the FOHE in accordance with Rolls-Royce Trent 900 Engine Manual

Task 72-00-34-050-801.

(2) Install a replacement FOHE in accordance with Rolls-Royce Trent 900 Engine

Manual Task 72-00-34-450-801. The replacement FOHE must have completed

less than 5000 hours TSN or 5000 hours TSO (in accordance with CMM

79-21-12 Revision 2 (or above)).

C. Record accomplishment instructions of NMSB 79-AH031 in accordance with local SB

tracking system procedures.

D. Return the removed FOHE to MEGGITT Control Systems for inspection/overhaul

(address given in Appendix 1).

Printed in Great Britain

RB.211−79−AH031

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Return Address for Trent 900 FOHE units which require inspection/rework:

MEGGITT Control Systems (Birmingham)

OSCAR HOUSE WHARFDALE ROAD

TYSELEY

BIRMINGHAM

B11 2DG

UNITED KINGDOM

APPENDIX 1

Printed in Great Britain

RB.211−79−AH031

Appendix 1 - Page 1 of 1

Oct.25/12

Oct.25/12
NMSB 79-AH031 Return Form Regarding Un-Removed/Un-Returned FOHE Units

Complete this form and return to your Rolls-Royce Service Representative.

Rolls-Royce Service Representatives are required to upload this form onto

MAXIMO-SDM.

The form is to be used to update records regarding FOHE unit history where possible.

1. Operator:

2. Engine S/N (If Applicable):

3. FOHE S/N:

4. FOHE Unit Details

Please complete as far as possible.

Hours Since New Cycles Since New Hours Since

Overhaul

(TSO)

Cycles Since

Overhaul

(CSO)

Name:

Signature:

Date:

APPENDIX 2

Printed in Great Britain

RB.211−79−AH031

Appendix 2 - Page 1 of 1

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