LIST OF EFFECTIVE PAGES

The effective pages to this Service Bulletin are as follows:

Page Revision Number Revision Date

Bulletin

1 Sep.26/12

2 Sep.26/12

3 Sep.26/12

4 Sep.26/12

5 Sep.26/12

6 Sep.26/12

7 Sep.26/12

8 Sep.26/12

9 Sep.26/12

10 Sep.26/12

11 Sep.26/12

12 Sep.26/12

Printed in Great Britain

RB.211−78−AG924

Transmittal - Page 2
1. Planning Information

A. Effectivity

Airbus A330

RB211 TRENT768-60, TRENT768-60/15, TRENT768-60/16 Propulsion Systems

RB211 TRENT772-60, TRENT772-60/15, TRENT772-60/16 Propulsion Systems

RB211 TRENT772B-60, TRENT772B-60/15, TRENT772B-60/16 Propulsion Systems

RB211 TRENT772C-60, TRENT772C-60/15, TRENT772C-60/16 Propulsion Systems

B. Concurrent Requirements

None

C. Reason

(1) Problem and Evidence

Hinge position numbers 3 and 4 are links between the thrust reverser and

the pylon, that feature a pin and bush pivot arrangement. The potential

for bushes to be fitted in service at the number 3 and 4 hinge positions

that do not feature the required heat treatment has been identified.

(2) Substantiation

The changes introduced by this Service Bulletin have been the subject of

satisfactory engineering analysis including stress analysis performed by

the thrust reverser manufacturer.

(3) Objective

Incorporation of this Service Bulletin (Modification) is designed to

maintain reliability.

(4) Effect of Bulletin on:

(a) Operation

Not affected

(b) Maintenance

Affected (see 1.L.,Other Publications Affected).

EXHAUST - THRUST REVERSER ATTACHING PARTS - INTRODUCTION OF A REVISED BUSHING AT NO.3

AND NO.4 HINGE POSITIONS WITH PART IDENTIFICATION - MOD.78-AG924

Printed in Great Britain

RB.211−78−AG924

Page 1 of 12

Sep.26/12

Sep.26/12
(c) Overhaul

Not affected

(d) Repair Schemes

Affected (Repairs will be updated to include the new part(s)

introduced by this Service Bulletin)

(e) Interchangeability

Affected (see 1.M.,Interchangeability of Parts).

D. Description

(1) This Service Bulletin introduces revised bushes at hinge positions number

3 and 4 on the thrust reverser unit

The change introduced by this Service Bulletin is:

A revised bush is introduced, similar to the existing item except for:

(a) The material specification has been changed to clarify the heat

treatment requirement

(b) The part number is ink marked on the outer barrel of the bush

(c) A scallop on each of the end faces of the bush for a permanent

identification compared to the current item

(2) Existing thrust reverser units left hand and right hand C-Ducts may be

reworked in accordance with Aircelle Service Bulletin 78-G924

(3) Left hand and right hand C-Ducts incorporating this Service Bulletin will

be identified by endorsement of the modification plate with 78-G924

(4) This Service Bulletin is in two parts as follows:

(a) Part 1

New production thrust reverser units.

(b) Part 2

Rework of in-service thrust reverser units.

E. Compliance

(1) On-wing

ALERT

Printed in Great Britain

RB.211−78−AG924

Page 2

Sep.26/12

Sep.26/12
This Service Bulletin must be accomplished on all powerplants by 14

December 2014.

(2) In-shop

ALERT

This Service Bulletin must be accomplished on all powerplants by 14

December 2014.

F. Approval

The technical content of Service Bulletin 78-G924 was approved by a

representative of the European Aviation Safety Agency (EASA) on 22nd June 2012,

EASA Certificate No.10040291.

The technical content of this document is approved under the authority of DOA

No. EASA.21.J.031.

G. Manpower

Refer to Aircelle Service Bulletin 78-G924

H. Material Price and Availability

Material required to accomplish this Service Bulletin (Modification) shall be

supplied free of charge.

I. Tooling Price and Availability

Special tools are not required

J. Weight and Balance

(1) Weight Change

None

(2) Moment Arm

No effect

(3) Datum

Power Plant Station (PPS) 100

K. References

(1) Aircraft Maintenance Manual, 78-32-51 and 78-32-52, Removal/Installation

(2) Aircelle Service Bulletin 78-G924

Printed in Great Britain

RB.211−78−AG924

Page 3

Sep.26/12

Sep.26/12
(3) Airbus SB No. A330-78-3021

This Service Bulletin is subject of aircraft modification No. 202463

S32262 (classified minor) and is covered by aircraft Service Bulletin No.

A330-78-3021.

Under no circumstances shall the modified equipment, resulting from the

application of this SB, be installed on the aircraft type unless the

corresponding modification, and if applicable, its aircraft SB are

approved.

L. Other Publications Affected

(1) For effect on Illustrated Parts List (IPL), refer to Aircelle Service

Bulletin 78-G784

(2) Aircelle Component Maintenance Manual 91A250-01, 78-30-20

(3) Refer to Airbus SB No. A330-78-3021

M. Interchangeability of Parts

Affected (see 2.E.,Instruction disposition code (2)).

Printed in Great Britain

RB.211−78−AG924

Page 4

Sep.26/12

Sep.26/12
2. Material Information

A. Parts required to accomplish this Service Bulletin:

RB211 TRENT768-60, TRENT768-60/15, TRENT768-60/16 Propulsion Systems

RB211 TRENT772-60, TRENT772-60/15, TRENT772-60/16 Propulsion Systems

TRENT 768, 772 Thrust Reversers

TRENT TR621, TRENT TR622

TRENT TR621 C-Ducts

CDL072AA, CDR072AA

TRENT TR622 C-Ducts

CDL072AA, CDR073AA

RB211 TRENT772B-60, TRENT772B-60/15, TRENT772B-60/16 Propulsion Systems

TRENT 772B Thrust Reversers

TRENT TR623, TRENT TR624

TRENT TR623 C-Ducts

CDL075AA, CDR075AA

TRENT TR624 C-Ducts

CDL075AA, CDR076AA

RB211 TRENT 772C-60, TRENT772C-60/15, TRENT772C-60/16 Propulsion Systems

TRENT 772C Thrust Reversers

TRENT TR100397

TRENT TR100397 C-Ducts

CDL100398, CDR100399

78-30-14

Parts 1 and 2 of SB

Printed in Great Britain

RB.211−78−AG924

Page 5

Sep.26/12

Sep.26/12
FIG

ITEM

NO.

NEW

PART

NO.

QTY PART TITLE MAT OLD

PART

NO.

INSTR

DISP

01208 91H364-02 2 Bush, sleeve - No.3 hinge

position

- 91H364-01 (2)

01258 91H364-02 2 Bush, sleeve - No.4 hinge

position

- 91H364-01 (2)

B. Parts to be reworked:

RB211 TRENT768-60, TRENT768-60/15, TRENT768-60/16 Propulsion Systems

RB211 TRENT772-60, TRENT772-60/15, TRENT772-60/16 Propulsion Systems

TRENT 768, 772 Thrust Reversers

TRENT TR621, TRENT TR622 LH C-Ducts CDL072AA

RB211 TRENT772B-60, TRENT772B-60/15, TRENT772B-60/16 Propulsion Systems

TRENT 772B Thrust Reversers

TRENT TR623, TRENT TR624 LH C-Ducts CDL075AA

RB211 TRENT 772C-60, TRENT772C-60/15, TRENT772C-60/16 Propulsion Systems

TRENT 772C Thrust Reversers

TRENT TR100397 LH C-Ducts CDL100398

78-31-00

Parts 1 and 2 of SB

FIG

ITEM

NO.

NEW

PART

NO.

QTY PART TITLE MAT OLD

PART

NO.

INSTR

DISP

01001 HDTR3411L

(SB78-G924)

1 C-Duct, LH Thrust

Reverser

- HDTR3411L

(Pre

SB78-G924)

(2)

01001 HDTR3412L

(SB78-G924)

1 C-Duct, LH Thrust

Reverser

- HDTR3412L

(Pre

SB78-G924)

(2)

Printed in Great Britain

RB.211−78−AG924

Page 6

Sep.26/12

Sep.26/12
FIG

ITEM

NO.

NEW

PART

NO.

QTY PART TITLE MAT OLD

PART

NO.

INSTR

DISP

01001 HDTR3413L

(SB78-G924)

1 C-Duct, LH Thrust

Reverser

- HDTR3413L

(Pre

SB78-G924)

(2)

01001 HDTR3414L

(SB78-G924)

1 C-Duct, LH Thrust

Reverser

- HDTR3414L

(Pre

SB78-G924)

(2)

01001 HDTR3415L

(SB78-G924)

1 C-Duct, LH Thrust

Reverser

- HDTR3415L

(Pre

SB78-G924)

(2)

01001 HDTR3416L

(SB78-G924)

1 C-Duct, LH Thrust

Reverser

- HDTR3416L

(Pre

SB78-G924)

(2)

01001 HDTR3417L

(SB78-G924)

1 C-Duct, LH Thrust

Reverser

- HDTR3417L

(Pre

SB78-G924)

(2)

RB211 TRENT768-60, TRENT768-60/15, TRENT768-60/16 Propulsion Systems

RB211 TRENT772-60, TRENT772-60/15, TRENT772-60/16 Propulsion Systems

TRENT 768, 772 Thrust Reversers

TRENT TR621, TRENT TR622

TRENT TR621 RH C-Ducts CDR072AA

TRENT TR622 RH C-Ducts CDR073AA

RB211 TRENT772B-60, TRENT772B-60/15, TRENT772B-60/16 Propulsion Systems

TRENT 772B Thrust Reversers

TRENT TR623, TRENT TR624

TRENT TR623 RH C-Ducts CDR075AA

TRENT TR624 RH C-Ducts CDR076AA

RB211 TRENT 772C-60, TRENT772C-60/15, TRENT772C-60/16 Propulsion Systems

TRENT 772C Thrust Reversers

Printed in Great Britain

RB.211−78−AG924

Page 7

Sep.26/12

Sep.26/12
TRENT TR100397

TRENT TR100397 RH C-Ducts CDR100399

78-31-00

Parts 1 and 2 of SB

FIG

ITEM

NO.

NEW

PART

NO.

QTY PART TITLE MAT OLD

PART

NO.

INSTR

DISP

02001 HDTR3413R

(SB78-G924)

1 C-Duct, RH Thrust

Reverser

- HDTR3413R

(Pre

SB78-G924)

(2)

02001 HDTR3414R

(SB78-G924)

1 C-Duct, RH Thrust

Reverser

- HDTR3414R

(Pre

SB78-G924)

(2)

02001 HDTR3415R

(SB78-G924)

1 C-Duct, RH Thrust

Reverser

- HDTR3415R

(Pre

SB78-G924)

(2)

02001 HDTR3416R

(SB78-G924)

1 C-Duct, RH Thrust

Reverser

- HDTR3416R

(Pre

SB78-G924)

(2)

02001 HDTR3418R

(SB78-G924)

1 C-Duct, RH Thrust

Reverser

- HDTR3418R

(Pre

SB78-G924)

(2)

02001 HDTR3419R

(SB78-G924)

1 C-Duct, RH Thrust

Reverser

- HDTR3419R

(Pre

SB78-G924)

(2)

02001 HDTR3420R

(SB78-G924)

1 C-Duct, RH Thrust

Reverser

- HDTR3420R

(Pre

SB78-G924)

(2)

C. New production parts:

The following parts will be made available as future spares in addition to

those listed under A and B:

RB211 TRENT768-60, TRENT768-60/15, TRENT768-60/16 Propulsion Systems

RB211 TRENT772-60, TRENT772-60/15, TRENT772-60/16 Propulsion Systems

TRENT 768, 772 Thrust Reversers

Printed in Great Britain

RB.211−78−AG924

Page 8

Sep.26/12

Sep.26/12
TRENT TR621, TRENT TR622

TRENT TR621 C-Ducts

CDL072AA, CDR072AA

TRENT TR622 C-Ducts

CDL072AA, CDR073AA

RB211 TRENT772B-60, TRENT772B-60/15, TRENT772B-60/16 Propulsion Systems

TRENT 772B Thrust Reversers

TRENT TR623, TRENT TR624

TRENT TR623 C-Ducts

CDL075AA, CDR075AA

TRENT TR624 C-Ducts

CDL075AA, CDR076AA

RB211 TRENT 772C-60, TRENT772C-60/15, TRENT772C-60/16 Propulsion Systems

TRENT 772C Thrust Reversers

TRENT TR100397

TRENT TR100397 C-Ducts

CDL100398, CDR100399

78-30-00

Part 1 of SB

FIG

ITEM

NO.

NEW

PART

NO.

QTY PART TITLE MAT OLD

PART

NO.

INSTR

DISP

01001 91A250-19 1 Reverser, Thrust -

Installation

- 91A250-18 (1)

D. Reference Drawings:

RB211 TRENT768-60, TRENT768-60/15, TRENT768-60/16 Propulsion Systems

RB211 TRENT772-60, TRENT772-60/15, TRENT772-60/16 Propulsion Systems

Printed in Great Britain

RB.211−78−AG924

Page 9

Sep.26/12

Sep.26/12
TRENT 768, 772 Thrust Reversers

TRENT TR621, TRENT TR622

TRENT TR621 C-Ducts

CDL072AA, CDR072AA

TRENT TR622 C-Ducts

CDL072AA, CDR073AA

RB211 TRENT772B-60, TRENT772B-60/15, TRENT772B-60/16 Propulsion Systems

TRENT 772B Thrust Reversers

TRENT TR623, TRENT TR624

TRENT TR623 C-Ducts

CDL075AA, CDR075AA

TRENT TR624 C-Ducts

CDL075AA, CDR076AA

RB211 TRENT 772C-60, TRENT772C-60/15, TRENT772C-60/16 Propulsion Systems

TRENT 772C Thrust Reversers

TRENT TR100397

TRENT TR100397 C-Ducts

CDL100398, CDR100399

78-30-14

Parts 1 and 2 of SB

FIG

ITEM

NO.

NEW

PART

NO.

QTY PART TITLE MAT OLD

PART

NO.

INSTR

DISP

01001 91A444-05 REF Bush, pin C-Duct attaching

parts

- 91A444-04 -

E. Instruction disposition codes:

(1) Two-Way Interchangeable. Old and new parts are fully interchangeable.

Printed in Great Britain

RB.211−78−AG924

Page 10

Sep.26/12

Sep.26/12
(2) One-Way Interchangeable. The old part may be replaced by the old or new

part in isolation, but the new part must not be replaced by the old part

in isolation.

Printed in Great Britain

RB.211−78−AG924

Page 11

Sep.26/12

Sep.26/12
3. Accomplishment Instructions

A. The revised C-Duct attachment sleeve bush introduced by this Service Bulletin

at TR C-Duct hinge positions No.3 and No.4 is interchangeable with the existing

item one-way only, the new bush must not be replaced by the old bush, see

1.M.,Interchangeability of Parts and see also 2.E.,Instruction disposition

codes. Remove the existing and install the new in accordance with existing

maintenance practices (Aircraft Maintenance Manual 78-32-51 and 78-32-52,

Removal/Installation).

B. A record of accomplishment is required.

Printed in Great Britain

RB.211−78−AG924

Page 12

Sep.26/12

Sep.26/12
Aircelle Customer Support Center Tel. : 33 (0)1 64 14 80 33 

BP 50042 Fax : 33 (0)1 64 14 84 10 

50, rue Pierre Curie 

78371 PLAISIR CEDEX – France

SB 78-AG924

Initial Issue, September. 26/2012

Page 1 of 6

SERVICE BULLETIN No. SB 78-AG924 

SLEEVE NO. 3 AND 4 – 

NO MARKING AND LACK OF HEAT TREATMENT. 

1. PLANNING INFORMATION 

A. Effectivity

Airbus A330 

This Service Bulletin is applicable on production to the Thrust Reverser Assembly Part No. 

91A250-19, HDTR3415L Trent 700 Thrust Reversers LH and HDTR3418R Trent 700 Thrust 

Reversers RH, Serial from 

No. 1040 included and onwards. 

For the retrofit in service this Service Bulletin is applicable to the Thrust Reverser Assembly Serial 

from No. 013 thru 1039 included. 

B. Concurrent Requirements

None. 

C. Reason

(1) Problem 

Sleeves No. 3 and 4 (P/N 91H364-01) were declared with a missing heat treatment. 

Sleeve 91H364-01 currently do not carry any permanent part number identification marking 

which makes it difficult to determine the Engineering Modification standard of the part. 

Clarification of the identity is required by Ink Marking and includes scallops (notches) to the 

sleeve ends for visual identification. 

(2) Substantiation 

The changes introduced by this Service Bulletin (modification) have been the subject of a 

satisfactory engineering analysis. 

(3) Objective 

This Service Bulletin gives instructions to replace the current parts on Trent 700 Thrust Reverser. 

(4) Cause 

Quality issues. 
Aircelle Customer Support Center Tel. : 33 (0)1 64 14 80 33 

BP 50042 Fax : 33 (0)1 64 14 84 10 

50, rue Pierre Curie 

78371 PLAISIR CEDEX – France

SB 78-AG924

Initial Issue, September. 26/2012

Page 2 of 6

(5) Effect of bulletin on: 

(a) Operation 

Not affected. 

(b) Maintenance 

Not affected. 

(c) Overhaul 

Not affected. 

(d) Repair Schemes 

Not affected. 

(e) Fits and Clearances 

Not affected. 

D. Description

This Service Bulletin gives instructions to replace the 12 O’clock Sleeves No. 3 and 4. 

E. Compliance

ALERT 

This Service Bulletin must be accomplished on all Powerplants by 14th December 2014. 

NOTE: This Service Bulletin introduces new parts 91H364-02. Old parts 91H364-01 must be 

scrapped and not installed on Trent 700 Thrust Reverser. 

F. Approval

The technical content of this Service Bulletin has been approved as part of Rolls-Royce Service 

Bulletin 78-AG924. 

G. Manpower

After you get access to the Thrust Reverser, the time to apply the Service Bulletin is: 

Estimated man-hours: 1.00 Man Hour 

H. Material - Price and Availability

Please refer to Rolls-Royce Service Bulletin. 

I. Tooling - Price and Availability

SLING – Thrust Reverser Cowls: HU87133. 

Installation / Extraction tool hinge No. 3 and 4: HU87128. 
Aircelle Customer Support Center Tel. : 33 (0)1 64 14 80 33 

BP 50042 Fax : 33 (0)1 64 14 84 10 

50, rue Pierre Curie 

78371 PLAISIR CEDEX – France

SB 78-AG924

Initial Issue, September. 26/2012

Page 3 of 6

J. Weight and Balance

Not affected. 

K. Electrical Load Data

Not applicable. 

L. References

(1) Aircraft Maintenance Manual AMM 71-13-00, AMM 78-32-51 and AMM 78-32-52. 

(2) Other source: 91N0465 rev B. 

M. Publications Affected

(1) Aircelle Component Maintenance Manual CMM 78-30-20. 

(2) Aircraft Illustrated Parts Catalogue IPC 78-30-14-01. 

N. Interchangeability of Parts

One-way interchangeable. 

The old part 91H364-01 may be replaced by the old part prior to the associated Airworthiness 

Directive compliance timescale, see 1.E. of this Service Bulletin. 

The old part may be replaced by the new part 91H364-02 at any time and must be replaced by the 

new part within the Airworthiness Directive compliance timescale, see 1.E. of this Service Bulletin. 

The new part must not be replaced by the old part at any time. It is not permissible to remove 

(demodify) this modification from powerplants once this Service Bulletin (Modification) has been 

accomplished. 

NOTE: Old parts 91H364-01 must be scrapped and not installed on Trent 700 Thrust Reverser. 
Aircelle Customer Support Center Tel. : 33 (0)1 64 14 80 33 

BP 50042 Fax : 33 (0)1 64 14 84 10 

50, rue Pierre Curie 

78371 PLAISIR CEDEX – France

SB 78-AG924

Initial Issue, September. 26/2012

Page 4 of 6

2. MATERIAL INFORMATION

A. Material information for the kits content

Kits for LH C Ducts and RH C Ducts: 

IPL 

Fig. / Item 

New Part 

Number 

Qty Keyword Mat. Old Part 

Number 

Inst.

Disp.

01 – 1Q 91A250-19 N/A THRUST REVERSER INSTALLATION - 91A250-18 (4) 

01 – 19 91A441-09 1 . KIT, C-DUCT, THRUST REVERSER LH - 91A441-08 (4) 

03 – 1B 91A444-05 1 .. ATTACHING PARTS C-DUCT - 91A444-04 (4) 

03 – 208A 

03 – 258A 91H364-02 2 ... SLEEVE, BUSHING No. 3 – 4 - 91H364-01 (4) 

01 – 59 91A441-59 1 . KIT, C-DUCT THRUST REVERSER RH - 91A441-58 (4) 

03 – 1B 91A444-05 1 .. ATTACHING PARTS C-DUCT - 91A444-04 (4) 

03 – 208A 

03 – 258A 91H364-02 2 ... SLEEVE, BUSHING No. 3 – 4 - 91H364-01 (4) 

B. Instructions disposition codes

Code (4): 

One-way interchangeable. 

The old part 91H364-01 may be replaced by the old part prior to the associated Airworthiness 

Directive compliance timescale, see 1.E. of this Service Bulletin. 

The old part may be replaced by the new part 91H364-02 at any time and must be replaced by the 

new part within the Airworthiness Directive compliance timescale, see 1.E. of this Service Bulletin. 

The new part must not be replaced by the old part at any time. It is not permissible to remove 

(demodify) this modification from powerplants once this Service Bulletin (Modification) has been 

accomplished. 

NOTE: Old parts 91H364-01 must be scrapped and not installed on Trent 700 Thrust Reverser. 
Aircelle Customer Support Center Tel. : 33 (0)1 64 14 80 33 

BP 50042 Fax : 33 (0)1 64 14 84 10 

50, rue Pierre Curie 

78371 PLAISIR CEDEX – France

SB 78-AG924

Initial Issue, September. 26/2012

Page 5 of 6

3. ACCOMPLISHMENT INSTRUCTIONS

A. General

WARNING: WHEN YOU DO THE PROCEDURES YOU MUST WEAR PROTECTIVE CLOTHING, 

GLOVES, DUST MASK AND SAFETY GOGGLES. THIS IS TO PROTECT YOU 

AGAINST DUST AND LOOSE PARTICLES, WHICH CAN BE DANGEROUS TO YOUR 

HEALTH. 

WARNING: WHEN YOU USE CLEANING MATERIALS, ADHESIVES, COATING AND SEALANT, 

REFER TO, AND OBEY, THE MANUFACTURER'S CONTROL AND APPLICATION 

INSTRUCTIONS AND HEALTH AND SAFETY NOTICES. 

CAUTION: DURING MODIFICATION, CARE MUST BE TAKEN NOT TO DAMAGE THE 

SURROUNDING EQUIPMENT; PLACE A COVER ON TOP OF THE ELECTRONIC 

UNIT PROTECTION BOX (EUPB) TO PREVENT ANY TOOL OR COMPONENT TO 

FALL BEHIND AND BE STUCK. 

B. Procedure

NOTE: This procedure is written for the Left Thrust Reverser but is equally applicable for the Right 

Thrust Reverser. 

(1) Get access: 

(a) Open the Left Fan Cowl Door. Refer to A330 Aircraft Maintenance Manual, TASK 71-13-00-

010-805. 

(2) Remove the Sleeves. Refer to A330 Aircraft Maintenance Manual, TASK 78-32-51-000-803-A. 

NOTE: For the Right Thrust Reverser, refer to the A330 Aircraft Maintenance Manual, 

TASK 78-32-52-000-802-A. 

(3) Install the Sleeves. Refer to A330 Aircraft Maintenance Manual, TASK 78-32-51-000-803-A. 

NOTE: For the Right Thrust Reverser, refer to the A330 Aircraft Maintenance Manual, 

TASK 78-32-52-000-802-A. 

(4) Close access. 

(a) Close the Left Fan Cowl Door. Refer to A330 Aircraft Maintenance Manual, TASK 71-13-00-

410-805. 

(5) Identification of the modification. 

(a) Mark 78-AG924 to the modification plate of the C-duct Left Thrust Reverser and C-duct 

Right Thrust Reverser. 
Aircelle Customer Support Center Tel. : 33 (0)1 64 14 80 33 

BP 50042 Fax : 33 (0)1 64 14 84 10 

50, rue Pierre Curie 

78371 PLAISIR CEDEX – France

SB 78-AG924

Initial Issue, September. 26/2012

Page 6 of 6

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