LIST OF EFFECTIVE PAGES

The effective pages to this Service Bulletin are as follows:

Page Revision Number Revision Date

Bulletin

1 Dec.11/12

2 Dec.11/12

3 Dec.11/12

4 Dec.11/12

5 Dec.11/12

6 Dec.11/12

7 Dec.11/12

8 Dec.11/12

9 Dec.11/12

10 Dec.11/12

11 Dec.11/12

12 Dec.11/12

13 Dec.11/12

14 Dec.11/12

15 Dec.11/12

16 Dec.11/12

17 Dec.11/12

18 Dec.11/12

19 Dec.11/12

20 Dec.11/12

21 Dec.11/12

22 Dec.11/12

23 Dec.11/12

24 Dec.11/12

Appendix 1

1 Dec.11/12

Printed in Great Britain

RB.211−72−AH059

Transmittal - Page 2
1. Planning Information

A. Effectivity

Airbus A380

All RB211 TRENT 970-84, TRENT 970B-84, TRENT 972-84, TRENT 972B-84, TRENT

977-84, TRENT 977B-84, TRENT 980-84 Engines

B. Reason

(1) Problem

Cracking of the rear balance land has previously been found in the Trent

800 and Trent 700 IP compressor shafts. The balancing feature and method

is similar on Trent 900 engines although the disc geometry is different

from Trent 700 and Trent 800 engines.

Non-Modification Service Bulletin (NMSB) 72-G269 was issued to specify an

in-shop visual inspection of the rear balance land and applies to Trent

900 engines only.

NMSB 72-G448 specifies an enhanced crack detection technique, eddy current

inspection for the rear balance land when the rear of the IPC module is

exposed and a borescope inspection of the balance land when it is not

exposed. This inspection is to be done in-shop on Trent 500 and Trent 900

engines

Following inspection at shop visit, cracking was confirmed in a Trent 500

IP compressor shaft rear balance land. NMSB 72-AH059 is being issued to

specify repeat on-wing borescope inspections for Trent 900 engines.

(2) Substantiation

This NMSB instructs an on-wing visual borescope inspection of the IP

compressor rear balance land, gaining access through the intermediate case

vane 8. This inspection can also be performed in-shop, in accordance with

NMSB 72-G448.

C. Description

This NMSB instructs on-wing visual borescope inspection of the IP compressor

shaft rear balance land in order to maintain serviceability and obtain data to

support engineering analysis.

ENGINE - IP COMPRESSOR SHAFT - VISUAL BORESCOPE INSPECTION OF BALANCE LAND -

NON-MODIFICATION SERVICE BULLETIN - NON - MOD.72-AH059

Printed in Great Britain

RB.211−72−AH059

Page 1 of 24

Dec.11/12

Dec.11/12
Send copies of the NMSB inspection results to your Rolls-Royce service

representative by completion of Appendix 1 (borescope inspection) or send an

equivalent form containing the same information.

A record of accomplishment should be attached to the engine record.

D. Compliance

(1) On-wing

ALERT

This NMSB must be accomplished within 280 flight cycles of the publication

date of this NMSB, unless NMSB 72-G448 is accomplished within this time

period on this IP compressor shaft.

This NMSB must then be repeated on an ongoing basis within 280 flight

cycles of the last previous accomplishment of NMSB 72-AH059 or NMSB

72-G448 on the IP compressor shaft.

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

(2) At overhaul

Not applicable

E. Approval

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

under the authority of Design Organisation Approval EASA.21J.035 on Dec.10/12.

F. Manpower

(1) On-wing

(a) Time to gain access

1 hour (after normal engine cool down and opening of C-ducts)(one

man).

(b) Time to inspect

1.5 hours (two men).

(c) Time to restore to serviceable condition

0.5 hours (one man).

(2) At overhaul

Not applicable

Printed in Great Britain

RB.211−72−AH059

Page 2

Dec.11/12

Dec.11/12
G. Material Price and Availability

OMat 2/142 - Safety Cable

H. Tooling Price and Availability

The following equipment is required to perform the inspection

(1) 4mm or 6mm flexible borescope with forward viewing and side view tips

(2) IP Rotor turning tool HU43985 (Trent 900)

(3) Borescope guide tube HU82346 or, as an alternative, a locally manufactured

nylon guide tube (made in accordance with the approximate dimensions given

in Fig.7) may be required to assist the correct positioning of the probe

viewing tip during inspection.

(4) LP system immobiliser HU44211 or HU44525-1

I. References

(1) Rolls-Royce RB211 Non-Modification Service Bulletins:

(a) 72-G269

Engine - IP Compressor Shaft - Visual Inspection of Balance Land

(b) 72-G448

Engine - IP Compressor Shaft - Eddy Current Inspection of Balance Land

(2) Aircraft Maintenance Manual (AMM), 72-00-00, Turn the Engine Intermediate

Pressure System.

Printed in Great Britain

RB.211−72−AH059

Page 3

Dec.11/12

Dec.11/12
2. Material Information

A. Parts required to accomplish this NMSB:

75-22-49

FIG

ITEM

NO.

NEW

PART

NO.

QTY PART TITLE MAT OLD

PART

NO.

INSTR

DISP

13100 FW24803 AR Air Tube - FW24803 -

13106 AS48528 AR Bolt - AS48528 -

13107 AS48512 AR Bolt - AS48512 -

13125,

13133,

01033,

01041,

02059,

02051,

03541

AS48409 AR Bolt - AS48409 -

13126,

13136,

01034,

01042,

02060,

02052,

03542

K8831 AR Washer - K8831 -

13132,

13140,

01048,

02066,

02058

AS41104 AR Clip Nut - AS41104 -

13128,

13136

UL12526 AR Clip - UL12526 -

01044,

01036

UL12506 AR Clip - UL12506 -

02062 UL12505 AR Clip - UL12505 -

02054 UL12510 AR Clip - UL12510 -

03544 UL12012 AR Clip - UL12012 -

Printed in Great Britain

RB.211−72−AH059

Page 4

Dec.11/12

Dec.11/12
FIG

ITEM

NO.

NEW

PART

NO.

QTY PART TITLE MAT OLD

PART

NO.

INSTR

DISP

03548 AS20624 AR Nut - AS20624 -

02056 UP10479 AR Spacer - UP10479 -

NOTE: Quantity As Required (AR) up to a maximum of 7.

Printed in Great Britain

RB.211−72−AH059

Page 5

Dec.11/12

Dec.11/12
3. Accomplishment Instructions

A. On-Wing Borescope Inspection of Trent 900 Engines

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

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

MINUTES AND GET MEDICAL AID.

WARNING: DO NOT TOUCH THE COMPONENTS OF THE OIL SYSTEM IF THE ENGINE IS HOT.

THESE COMPONENTS STAY HOTTER THAN OTHER COMPONENTS. HOT COMPONENTS CAN

CAUSE INJURY.

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.

CAUTION: DO NOT START THE BORESCOPE INSPECTION UNTIL THE ENGINE HAS COOLED TO

WITHIN THE BORESCOPE MANUFACTURERS RECOMMENDATIONS. THE ENGINE IS HOT

IMMEDIATELY AFTER THE ENGINE IS STOPPED AND CAN CAUSE BURNS AND DAMAGE

TO BORESCOPE INSPECTION EQUIPMENT.

(1) Prepare the engine for Borescope Inspection of the Intermediate Pressure

(IP) Compressor Stage 8 Balance Land.

(a) Open the applicable circuit breakers and install safety tags in

accordance with Aircraft Maintenance Manual (AMM) 72-00-00, Turn the

Engine Intermediate Pressure System.

(b) Safely open the left and right thrust reversers in accordance with AMM

72-00-00, Turn the Engine Intermediate Pressure System.

(c) Use the LP system immobiliser (HU44211 or HU44525-1) to prevent

movement of the LP compressor in accordance with AMM 72-00-00, Turn

the Engine Intermediate Pressure System.

(d) Attach the Rolls-Royce Trent IP Turning Tool (HU43985) to turn the IP

system in accordance with AMM 72-00-00, Turn the Engine Intermediate

Pressure System.

Printed in Great Britain

RB.211−72−AH059

Page 6

Dec.11/12

Dec.11/12
(e) Gain access to the intermediate case Vane 8, by removing the IP8 air

tube (P/N FW24803). Refer to Fig.1.

CAUTION: YOU MUST HOLD THE TUBE(S) WHEN YOU LOOSEN OR TIGHTEN THE

CONNECTIONS. MAKE SURE THE TUBE(S) CANNOT TWIST. DAMAGE

CAN OCCUR IF THE TUBE(S) DO TWIST.

(i) Disassemble and retain the seven clip positions 210106, 210107,

210101, 210100, 210104, 210103 and 210105.

(ii) Disconnect air tube (P/N FW24803) from the two IP8 air tubes

(P/N FW48296 and P/N FW30489).

(iii) Remove and retain the two bolts (P/N AS48528) and the one bolt

(P/N AS48512) that attach the tube to the compressor

intermediate case.

(iv) Remove the IP8 air tube (P/N FW24803).

(2) Perform the initial borescope inspection of the IP compressor stage 8 disc

balance land using the forward viewing tip. Refer to Fig.2.

CAUTION: YOU MUST MAKE SURE THAT THE BORESCOPE IS NOT IN THE PATH OF

ANY ROTATING COMPONENT WHEN YOU TURN THE ENGINE. IF THE

BORESCOPE AND THE ROTATING COMPONENT TOUCH, DAMAGE TO EITHER

THE ROTATING COMPONENT OR THE BORESCOPE WILL OCCUR.

(a) Insert the borescope with a forward viewing tip fitted into the

intermediate case IP8 offtake hole. The vane will guide the borescope

towards the rear of the IP compressor stage 8 disc. Articulate the

borescope to view the balance land with a forward viewing tip as shown

in Fig.2.

(b) Use the HU43985 turning tool to slowly rotate the IP compressor and

inspect the balance land from over the entire circumference of the

balance land. Note that together with the final inspection, zone A of

the balance land should be inspected over the entire circumference.

Refer Fig.3.

(c) Look for cracks, dents or nicks and loose balance weights (see Fig.4

and Fig.5). For acceptance criteria refer to step 3.A.(5).

NOTE: Carefully inspect the area around the balance weights.

Carefully inspect all around the edge of the clamp plate to

make sure there is no cracking that has started underneath the

clamp plate.

(d) Record the results in Appendix 1.

(e) Withdraw the borescope from the intermediate case.

Printed in Great Britain

RB.211−72−AH059

Page 7

Dec.11/12

Dec.11/12
(3) Perform the final borescope inspection of the IP compressor stage 8 disc

balance land using the side viewing tip. Refer to Fig.2.

CAUTION: YOU MUST MAKE SURE THAT THE BORESCOPE IS NOT IN THE PATH OF

ANY ROTATING COMPONENT WHEN YOU TURN THE ENGINE. IF THE

BORESCOPE AND THE ROTATING COMPONENT TOUCH, DAMAGE TO EITHER

THE ROTATING COMPONENT OR THE BORESCOPE WILL OCCUR.

(a) Insert the borescope with a side viewing tip fitted into the guide

tube so that the tip of the borescope is just short of the guide tube

end. Face the curved end of the guide tube towards the front of the

engine and insert it into the intermediate case IP8 offtake hole. The

guide tube will need to be straightened by hand to go into the vane.

Push the guide tube into the engine until its end is in the cavity

behind the stage 8 disc when it will then spring back to its original

shape.

(b) Push the borescope through the guide tube until the viewing tip

emerges from the guide tube. Rotate and articulate the borescope until

it views the balance land recess outer diameter and chamfer as shown

in Fig.2.

(c) Use the HU43985 turning tool to slowly rotate the IP compressor and

inspect the balance land over the entire circumference of the balance

land. Note that together with the initial inspection, zone A of the

balance land should be inspected over the entire circumference. Refer

to Fig.3.

(d) Look for cracks, dents or nicks and loose balance weights (Refer to

Fig.5 and Fig.6). For acceptance criteria refer to step 3.A.(5).

NOTE: Carefully inspect the area around the balance weights.

Carefully inspect all around the edge of the clamp plate to

make sure there is no cracking that has started underneath the

clamp plate.

(e) Record the results in Appendix 1.

(f) Withdraw the borescope until the viewing tip is inside the guide tube

and then withdraw the borescope and guide tube through the

intermediate case.

Printed in Great Britain

RB.211−72−AH059

Page 8

Dec.11/12

Dec.11/12
(4) Restore the engine to serviceable condition.

CAUTION: YOU MUST HOLD THE TUBE(S) WHEN YOU LOOSEN OR TIGHTEN THE

CONNECTIONS. MAKE SURE THE TUBE(S) CANNOT TWIST. DAMAGE CAN

OCCUR IF THE TUBE(S) DO TWIST.

(a) Install the IP8 air tube (P/N FW24803). Refer to Fig.1.

(i) Attach the IP8 air tube (P/N FW24803) to the two tubes (P/N

FW30489 and P/N FW48296).

(ii) Attach the tube to the compressor intermediate case with the

two bolts (P/N AS48528) and the bolt (P/N AS48512).

(iii) Torque the two bolts (P/N AS48528) to 11,5 Nm (100 lbfin.) and

the bolt (P/N AS48512) to 11,5 Nm (100 lbfin).

(iv) Assemble the clip positions 210106, 210107, 210101, 210100,

210104, 210103 and 210105.

(v) Torque the tube nut on the tube (P/N FW30489) that connects to

the tube (P/N FW24803) to 84,0 Nm (61.9 lbfft).

(vi) Torque the tube nut on the tube (P/N FW48296) that connects to

the tube (P/N FW24803) to 61,0 Nm (540 lbfin).

(vii) Secure the tube connection with OMat 2/142 safety cable.

(b) Make the engine ready for operation.

(i) Remove the Rolls-Royce Trent IP turning tool (HU43985) and LP

system immobiliser (HU44211) or (HU44525-1) in accordance with

AMM 72-00-00, Turn the Engine Intermediate Pressure System.

(ii) Return the engine to operating condition in accordance with the

AMM, 72-00-00, Turn the Engine Intermediate Pressure System.

(5) Acceptance Criteria

(a) Cracked - Reject, inform Rolls-Royce as soon as practically possible.

(b) Dented or Nicked:

(i) Reject within 20 cycles. Supply pictures of dent or nick to

Rolls-Royce Technical Help Desk.

Printed in Great Britain

RB.211−72−AH059

Page 9

Dec.11/12

Dec.11/12
(c) Loose balance weights:

(i) Reject within 20 cycles. Supply pictures of balance weights to

Rolls-Royce Technical Help Desk.

NOTE: If any of the acceptance criteria in step 3.A.(5) are not

met; retain and quarantine the balance weights, clamp

plates, bolts and washers and IP compressor shaft when

removed within 20 cycles. Refer to Rolls-Royce via your

local representative within 2 weeks of the inspection.

(6) Record the inspection results on the inspection sheet provided in Appendix

1 or similar form containing the same information.

(7) Accomplishment of this Non-Modification Service Bulletin should be

recorded in the engine logbook.

Printed in Great Britain

RB.211−72−AH059

Page 10

Dec.11/12

Dec.11/12
deh0013240

210106

210107

210101 210100 210104

210103

210105

TUBE

FW24803

B C

C

B

TUBE

FW48296

TUBE

FW30489

BOLT

AS48528

(2 off)

BOLT

AS48512

TUBE

FW24803

COMPRESSOR

INTERMEDIATE CASE

FW61486

72−33−10

02−500

NOTE:

All IPC Fig/Item numbers are 75−22−49

unless identified differently

A

13−100 A

13−500

13−700

13−106

13−107

13−100

Trent 900 - Location of IP8 air tube

Fig.1 (sheet 1 of 8)

Printed in Great Britain

RB.211−72−AH059

Page 11

Dec.11/12

Dec.11/12
FW31940

02−240

CLIP POSITION 210100

deh0013230

AS48409

75−22−49

13−125

K8831

75−22−49

13−126

UL12526

75−22−49

13−128

AS41104

75−22−49

13−132

72−00−41

FW24803

75−22−49

13−100

BRACKET

BOLT

WASHER

CLIP

CLIP NUT

TUBE

Clip Position 210100

Fig.1 (sheet 2 of 8)

Printed in Great Britain

RB.211−72−AH059

Page 12

Dec.11/12

Dec.11/12
AS48409

75−22−49

13−133

K8831

75−22−49

13−134

UL12526

75−22−49

13−136

AS41104

75−22−49

13−140

CLIP POSITION 210106

deh0013231

FW26575

72−41−11

01−342

FW24803

75−22−49

13−100

BOLT

WASHER

CLIP

CLIP NUT

BRACKET

TUBE

Clip Position 210106

Fig.1 (sheet 3 of 8)

Printed in Great Britain

RB.211−72−AH059

Page 13

Dec.11/12

Dec.11/12
deh0013245

AS48408

71−52−23

01−033

K8831

71−52−23

01−034

UL12506

71−52−23

01−036

AS41104

71−52−23

01−040

CLIP POSITION 210103

ELECTRICAL

HARNESS

71−52−23

01−015

FW24803

75−22−49

13−100

BOLT

WASHER

CLIP

CLIP NUT

FW30246

TUBE

Clip Position 210103

Fig.1 (sheet 4 of 8)

Printed in Great Britain

RB.211−72−AH059

Page 14

Dec.11/12

Dec.11/12
deh0013243

AS48408

71−52−23

01−041

K8831

71−52−23

01−042

UL12506

71−52−23

01−044

AS41104

71−52−23

01−048

CLIP POSITION 210104

ELECTRICAL

HARNESS

71−52−23

01−015

FW24803

75−22−49

13−100

BOLT

WASHER

CLIP

CLIP NUT

FW30246

TUBE

Clip Position 210104

Fig.1 (sheet 5 of 8)

Printed in Great Britain

RB.211−72−AH059

Page 15

Dec.11/12

Dec.11/12
deh0013244

BOLT

77−32−15

WASHER 02−059

77−32−15

02−060

CLIP

77−32−16

02−062

CLIP

77−32−15

02−062

CLIP NUT

77−32−15

02−066

CLIP POSITION 210105

TUBE

75−22−49

13−100

VIBRATION

LEAD 1

77−32−14

01−200

VIBRATION

LEAD 2

77−32−14

01−200

AS48409

K8831

UL12505

UL12505

AS41104

FW24803

922−347−000−111

922−347−000−111

Clip Position 210105

Fig.1 (sheet 6 of 8)

Printed in Great Britain

RB.211−72−AH059

Page 16

Dec.11/12

Dec.11/12
BOLT

71−51−42

02−051

WASHER

71−51−42

02−052

CLIP

71−51−42

02−054

TUBE

75−22−49

13−100

CLIP NUT

71−51−42

02−058

CLIP POSITION 210107

deh0013241

SPACER

71−51−42

02−056

ELECTRICAL

HARNESS

71−51−42

01−015

AS48415

K8831 UL12510

FW24803

AS41104

UP10479

FW34195

Clip Position 210107

Fig.1 (sheet 7 of 8)

Printed in Great Britain

RB.211−72−AH059

Page 17

Dec.11/12

Dec.11/12
AS48408

79−22−49

03−541

K8831

79−22−49

03−542

FW24803

75−22−49

13−100

AS20624

79−22−49

03−548

CLIP POSITION 210101

deh0013242

FW44988

79−22−49

03−500

UP12012

79−22−49

03−544

BOLT

WASHER

TUBE

NUT

TUBE

CLIP

Clip Position 210101

Fig.1 (sheet 8 of 8)

Printed in Great Britain

RB.211−72−AH059

Page 18

Dec.11/12

Dec.11/12
deh0013225

GUIDE TUBE

BORESCOPE

A

A

SIDE VIEWING TIP

FINAL INSPECTION

FORWARD VIEWING TIP

INITIAL INSPECTION

Trent 900 Engines - Borescope View Directions

Fig.2

Printed in Great Britain

RB.211−72−AH059

Page 19

Dec.11/12

Dec.11/12
deh0013229

A

A

ZONE A

Trent 900 Engines - Identification of Zone A - The Zone to be Inspected

Fig.3

Printed in Great Britain

RB.211−72−AH059

Page 20

Dec.11/12

Dec.11/12
CAREFULLY INSPECT

AROUND THE EDGE

OF THE CLAMP PLATE

TO ENSURE THAT

THERE IS NO CRACK

THAT HAS STARTED

UNDERNEATH THE

CLAMP PLATE

deh0013226

CRACK

(Example)

Previously seen Crack Position on Trent 700 Engine

Fig.4

Printed in Great Britain

RB.211−72−AH059

Page 21

Dec.11/12

Dec.11/12
deh0013228

CIRCUMFERENTIAL

FWD

INNER DISC

WASHER TIGHT AND CORRECTLY FITTED, WITH

LOCKING FEATURES BENT UPWARDS, MAKING

CONTACT WITH BOLT HEAD

BOLT HEAD CLOSELY

ATTACHED TO CLAMP PLATE

NO VISIBLE GAPS

BETWEEN CLAMP PLATE

AND WEIGHT OR

WEIGHT AND 

BALANCE LAND

BALANCE LAND

Properly fitted Balance Weight

Fig.5

Printed in Great Britain

RB.211−72−AH059

Page 22

Dec.11/12

Dec.11/12
deh0013227

CRACK

CAREFULLY INSPECT

AROUND THE EDGE

OF THE CLAMP PLATE

TO ENSURE THAT

THERE IS NO CRACK

THAT HAS STARTED

UNDERNEATH THE

CLAMP PLATE

(Example)

Previously seen Crack Position on Trent 800 Engine

Fig.6

Printed in Great Britain

RB.211−72−AH059

Page 23

Dec.11/12

Dec.11/12
deh0013727

288 mm

290 mm

326 mm

38 mm

52°

Ø 7.5 mm

Ø 10 mm

97 mm

R 35.5 mm

Nylon Guide Tube

Fig.7

Printed in Great Britain

RB.211−72−AH059

Page 24

Dec.11/12

Dec.11/12
1. This form is to be completed for every shaft inspected in accordance with

Accomplishment Instructions (3.A.).

2. Record Accomplishment of this Non-Modification Service Bulletin in accordance

with local Service Bulletin tracking procedures

3. Advise your local Rolls-Royce service representative of NMSB accomplishment and

inspection results regardless of findings.

Trent 900 Visual Borescope Inspection Results

Form to be completed for every engine inspected, results to be sent to Rolls-Royce,

via your local representative.

Feedback Sheet NMSB 72-AH059 Visual Borescope Inspection of IPC 8 Balance Land

Operator

Date of Inspection

Engine Serial Number

Engine Mark

Engine CSN

Engine TSN

IPC Shaft Part No.

IPC Shaft Ser No.

IPC Shaft CSN

IPC Shaft TSN

Borescope Inspection Result (if none, record N/A, if

finding record dimensions and position)

Initial Inspection Final Inspection

Cracking

Dents or Nicks on the

Balance Land

Loose Balance Weights

Inspected by: Stamp:

APPENDIX 1

Printed in Great Britain

RB.211−72−AH059

Appendix 1 - Page 1 of 1

Dec.11/12

Dec.11/12