This document transmits Revision 3 to Service Bulletin RB211-72-G448

Document History

Service Bulletin Revision Status Supplement Revision Status

Initial Issue Jul.26/10

Revision 1 Oct.29/10

Revision 2 Dec.23/10

Bulletin Revision 3

Remove Incorporate Reason for change

Pages 1 to 50 of the

Service Bulletin

Pages 1 to 51 of the

Service Bulletin

Revision 3 of this NMSB is

to change the order of

visual and eddy current

inspection procedures and

to make minor changes to

the eddy current inspection

procedures in section 3.D.

Accomplishment

Instructions. Revised

Fig.18, Fig.19, Fig.20 and

Appendix 2 (feedback

sheet). Minor non-technical

changes also made.

Printed in Great Britain

Jul. 7/11

RB211 TRENT 500 AND TRENT 900 SERIES PROPULSION SYSTEMS NON-MODIFICATION

SERVICE BULLETIN

RB.211−72−G448

Transmittal - Page 1 of 4

Signed Date
All pages of

Appendix 1

Page 1 and 2 of

Appendix 1

Revision 3 of this NMSB is

to change the order of

visual and eddy current

inspection procedures and

to make minor changes to

the eddy current inspection

procedures in section 3.D.

Accomplishment

Instructions. Revised

Fig.18, Fig.19, Fig.20 and

Appendix 2 (feedback

sheet). Minor non-technical

changes also made.

All pages of

Appendix 2

Page 1 and 2 of

Appendix 2

Revision 3 of this NMSB is

to change the order of

visual and eddy current

inspection procedures and

to make minor changes to

the eddy current inspection

procedures in section 3.D.

Accomplishment

Instructions. Revised

Fig.18, Fig.19, Fig.20 and

Appendix 2 (feedback

sheet). Minor non-technical

changes also made.

All pages of

Appendix 3

Page 1 and 2 of

Appendix 3

Revision 3 of this NMSB is

to change the order of

visual and eddy current

inspection procedures and

to make minor changes to

the eddy current inspection

procedures in section 3.D.

Accomplishment

Instructions. Revised

Fig.18, Fig.19, Fig.20 and

Appendix 2 (feedback

sheet). Minor non-technical

changes also made.

Printed in Great Britain

RB.211−72−G448

Transmittal - Page 2
LIST OF EFFECTIVE PAGES

The effective pages to this Service Bulletin following incorporation of Revision

3 are as follows:

Page Revision Number Revision Date

Bulletin

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Printed in Great Britain

RB.211−72−G448

Transmittal - Page 3
R 45 3 Jul.7/11

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Appendix 1

R 1 3 Jul.7/11

R 2 3 Jul.7/11

Appendix 2

R 1 3 Jul.7/11

R 2 3 Jul.7/11

Appendix 3

R 1 3 Jul.7/11

R 2 3 Jul.7/11

Printed in Great Britain

RB.211−72−G448

Transmittal - Page 4
1. Planning Information

A. Effectivity

(1) Airbus A340

RB211 TRENT553-61 Engines

RB211 TRENT553A2-61 Engines

RB211 TRENT556-61 Engines

RB211 TRENT556A2-61 Engines

RB211 TRENT556B-61 Engines

RB211 TRENT556B2-61 Engines

RB211 TRENT560-61 Engines

RB211 TRENT560A2-61 Engines

(2) Airbus A380

RB211 TRENT970-84 Engines

RB211 TRENT970B-84 Engines

RB211 TRENT972-84 Engines

RB211 TRENT972B-84 Engines

RB211 TRENT977-84 Engines

RB211 TRENT977B-84 Engines

RB211 TRENT980-84 Engines

B. Reason

(1) Problem

Cracking of the rear balance land has been found on two Trent 800 IP

compressor shafts and on one Trent 700 IP compressor shaft. The balancing

feature and method is similar on Trent 500 and Trent 900 engines although

the disc geometry is different from Trent 700 and Trent 800 engines.

ENGINE - IP COMPRESSOR SHAFT - IN SHOP EDDY CURRENT OR BORESCOPE INSPECTION OF

BALANCE LAND - NON-MODIFICATION SERVICE BULLETIN - NON - MOD.72-G448

Printed in Great Britain

RB.211−72−G448

Page 1 of 51

Jul 26/10

R Jul. 7/11
Non-Modification Service Bulletin (NMSB) 72-AF260 was issued to specify an

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

500, Trent 700 and Trent 800 engines.

NMSB72-G269 was later issued to specify an in-shop visual inspection of

the rear balance land and applied to Trent 900 engines only.

NMSB72-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.

(2) This NMSB supersedes NMSB72-G269 for Trent 900 engines.

(3) Substantiation

This NMSB instructs in-shop inspection of the IP compressor shaft rear

balance land. If the rear of the IP compressor module is exposed this is

an eddy current inspection. If it is not exposed this is a borescope

inspection gaining access through the intermediate case.

Revision 1 of this NMSB was issued to add a procedure for determining if

an Eddy Current Inspection crack indication is spurious or genuine.

R issued to extend the date from which the NMSB Revision 2 of this NMSB was

R effective, that followed a delay in the availabilty of the Eddy became

Current Inspection tooling.

Revision 3 of this NMSB is to change the order of visual and eddy current

inspection procedures and to make minor changes to eddy current inspection

procedures in section 3.D. Accomplishment Instructions.

R

R

R

(4) Effect of Bulletin on:

(a) Operation

Not affected.

(b) Maintenance

Not affected.

(c) Overhaul

Not affected.

(d) Repair Schemes

Not affected.

Printed in Great Britain

RB.211−72−G448

Page 2

Jul 26/10

R Jul. 7/11
(e) Interchangeability

Not affected.

C. Description

This NMSB instructs an in-shop inspection of the IP compressor shaft rear

balance land in order to maintain serviceability and obtain data to support

engineering analysis.

Send copies of the NMSB inspection results to your Rolls-Royce service

representative by completion of Appendix 1 (borescope inspection) or Appendix 2

(eddy current inspection) or send an equivalent form containing the same

information.

D. Compliance

RECOMMENDED

(1) This Non-Modification Service Bulletin is effective from 1st March 2011

onwards. For engines not inducted into the shop at this date inspect

following the next shop visit induction. For engines that are in the shop

at this date inspect if substantial rebuild has not yet started.

(2) An inspection is required at each shop visit, but the type of inspection

that should be accomplished is dependent on the level of shop visit for

the IPC Module:

Engine IPC Module Workscope Inspection

Trent 500 Level 1 and rear face

of IPC module is not

exposed

3.B. (borescope

inspection)

Trent 900 Level 1 and rear face

of IPC module is not

exposed

3.C. (borescope

inspection)

Trent 500 and

Trent 900

Level 1 - 4 and rear

face of IPC module is

exposed

3.D. (eddy current

inspection)

(3) This NMSB need not be accomplished on IP Compressor Shafts that have a

life of zero cycles since new.

E. Approval

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

under the authority of Design Organisation Approval EASA.21J.035 on Jul.21/10,

Oct.28/10, Dec.23/10

R

R and was re-approved on Jul.5/11.

Printed in Great Britain

RB.211−72−G448

Page 3

Jul 26/10

R Jul. 7/11
F. Manpower

(1) Borescope Inspection:

(a) Time to gain access

30 minutes (1 person).

(b) Time to inspect

1 hour 30 minutes (2 persons).

(c) Time to restore to serviceable condition

1 hour (1 person).

(2) Eddy Current Inspection:

(a) Time to remove balance weights

15 minutes (1 person).

(b) Time to clean balance land

Up to 2 hours, depending on level of debris in balance land recess (1

person).

(c) Time to inspect

2 hours (1 person).

NOTE: The ECI technique described in section 3. Accomplishment

Instructions must only be carried out by personnel approved to

the applicable national standard (EN4179, NAS 410 or

equivalent) at level 2 or higher.

R

R

R

R

(d) Time to install balance weights

15 minutes (1 person).

NOTE: Parts affected by this NMSB are accessible at overhaul

G. Material Price and Availability

Modification kit not required; parts supplied as single line items.

H. Tooling Price and Availability

The following equipment is required to accomplish this NMSB:

Printed in Great Britain

RB.211−72−G448

Page 4

Jul 26/10

R Jul. 7/11
Part No. Description

Borescope 4 mm or 6 mm flexible borescope with

forward viewing and side view tips

HU40324 IP Rotor turning tool (Trent 500)

HU43985 IP Rotor turning tool (Trent 900)

HU82346 Borescope guide tube

Rohmann Elotest B1 or

equivalent instrument

Phase Display Eddy Current Instrument

HU44791 Trent 500 IPC stage 8 balance land Eddy

Current Inspection Kit comprising of

the following parts:

HU44793 (Wheeled carriage)

MDK1 H-1803.03.1 (Eddy Current Probe)

HU44792 (Calibration Block)

HU44795 Trent 900 IPC stage 8 balance land Eddy

Current Inspection Kit comprising of

the following parts:

HU44797 (Wheeled carriage)

MDK1 H-1803.03.1 (Eddy Current Probe)

HU44796 (Calibration Block)

Elotest instruments - EK/2HF/1

Connecting leads for other instruments

are available from Rohmann

Probe to instrument connecting cable

I. References

(1) Trent 500 Engine Manual, 72-32-31, Cleaning, Inspection

(2) Trent 900 Engine Manual, 72-00-13, Clip Position Data

(3) Trent 900 CIR Manual, 72-32-31, Cleaning, Inspection

(4) Overhaul Processes Manual TSD594J, 70-00-00, OP101, OP117, OP363

(5) Standard Practices Manual, 70-51-00, Torque Tighten Components, 70-12-04,

Procedures used to Lock Threaded Parts

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

(a) 72-AF260

Engine - IP compressor shaft - Visual inspection of balance land

(b) 72-G269

Engine - IP compressor shaft - Visual inspection of balance land

Printed in Great Britain

RB.211−72−G448

Page 5

Jul 26/10

R Jul. 7/11
2. Material Information

A. Parts required to accomplish this Non-Modification Service Bulletin:

All Engines

72-32-31

FIG

ITEM

NO.

NEW

PART

NO.

QTY PART TITLE MAT OLD

PART

NO.

INSTR

DISP

01450 AS44702 AR Bolt, 0.190 in. dia

x 0.335 in.

VU1653

- AS44702 -

01452 AS44691 AR Washer, VU1653 - AS44691 -

01445 AS44696 AR Clamp - AS454696 -

01415 AS44695

-150

AR Balance weight - AS44695-150-

01417 AS44695

-175

AR Balance weight - AS44695-175-

01419 AS44695

-200

AR Balance weight - AS44695-200-

01421 AS44695

-225

AR Balance weight - AS44695-225-

01423 AS44695

-250

AR Balance weight - AS44695-250-

01425 AS44695

-275

AR Balance weight - AS44695-275-

01427 AS44695

-300

AR Balance weight - AS44695-300-

Trent 500 Engines

75-22-49

FIG

ITEM

NO.

NEW

PART

NO.

QTY PART TITLE MAT OLD

PART

NO.

INSTR

DISP

21100 FW17133 AR Air Tube - FW17133 -

Printed in Great Britain

RB.211−72−G448

Page 6

Jul 26/10

R Jul. 7/11
FIG

ITEM

NO.

NEW

PART

NO.

QTY PART TITLE MAT OLD

PART

NO.

INSTR

DISP

21106 AS48510 AR Bolt - AS48510 -

21114 AS48513 AR Bolt - AS48513 -

21112 AS12944 AR Washer - AS12944 -

21113 CU37148 AR Washer - CU37148 -

21125 AS48408 AR Bolt (CP101919) - AS48408 -

21126 K8831 AR Washer (CP101919) - K8831 -

21128 UP11470 AR Clip (CP101919) - UP11470 -

21132 AS20624 AR Nut (CP101919) - AS20624 -

Trent 900 Engines

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 -

NOTE: Quantity As Required (AR) up to a maximum of 4.

Printed in Great Britain

RB.211−72−G448

Page 7

Jul 26/10

R Jul. 7/11
3. Accomplishment Instructions

A. Consumable Materials

OMat 4/46, jointing compound

OMat 261, temporary marker

OMat 2/142, safety cable

R PTFE adhesive tape. Note that the same type of tape OMat 256 or OMat 2/30,

R must be used throughout all stages of calibration and inspection.

B. Borescope Inspection of Trent 500 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.

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.

NOTE: If parts have already been disassembled or the applicable system is not

available, some steps will not be required.

(1) Get access to compressor intermediate case, vane 8 by removing the IP8

buffer air tube (EIPC 75-22-49, Fig/Item 21-100).

(a) Disconnect air tube (EIPC 75-22-49, Fig/Item 21-500) from the IP8

buffer air tube (EIPC 75-22-49, Fig/Item 21-100) at the compressor

intermediate case firewall. Refer to Fig.1.

(b) Remove and retain bolts (EIPC 75-22-49, Fig/Item 21-114) and washers

(EIPC 75-22-49, Fig/Item 21-112 and 21-113) that connect the IP8

buffer air tube (EIPC 75-22-49, Fig/Item 21-100) to the compressor

intermediate case firewall. Refer to Fig.1.

(c) Remove and retain clipstack CP101919. Refer to Fig.3.

(d) Remove and retain bolts (EIPC 75-22-49, Fig/Item 21-106) 3 off

connecting the tube to the compressor intermediate case. Refer to

Fig.1.

(e) Remove IP8 buffer air tube (EIPC 75-22-49, Fig/Item 21-100).

Printed in Great Britain

RB.211−72−G448

Page 8

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(2) Do the borescope inspection of the IP compressor stage 8 disc balance land

from Direction 1.

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

intermediate case, vane 8. The vane will guide the borescope towards

the rear of the IP compressor stage 8 disc.

(b) Slowly move the borescope to view the balance land from Direction 1 as

shown in Fig.5.

CAUTION: MAKE SURE THAT THE BORESCOPE IS NOT IN THE PATH OF ANY ROTATING

COMPONENT WHEN YOU TURN THE ENGINE. IF THE BORESCOPE AND ROTATING

COMPONENT TOUCH, DAMAGE TO EITHER THE ROTATING COMPONENT OR

BORESCOPE WILL OCCUR.

(c) Use HU40324, turning tool to slowly turn the IP compressor.

(d) Do an inspection of the balance land from Direction 1 over all the

circumference of the balance land. Refer to Fig.5.

NOTE: Together with inspection from Direction 2 (refer to section

3.B.(3)), you must do an inspection of Zone A of the balance

land along the circumference. Refer to Fig.6.

(e) Look for cracks (refer to Fig.7 and Fig.8), dents or nicks and loose

balance weights (refer to Fig.9). For acceptance criteria refer to

section 3.B.(4)

NOTE: Carefully examine the area around the balance weights.

Carefully examine all around the edge of the clamp plate to

make sure there is no cracking that has started underneath the

clamp plate.

(f) Record the results in Appendix 1.

(g) Remove borescope from the compressor intermediate case, vane 8.

(3) Do the borescope inspection of the IP compressor stage 8 disc balance land

from Direction 2.

(a) Put the borescope with a side viewing tip fitted into HU82346, guide

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

end.

(b) Make sure the curved end of the guide tube is towards the front of the

engine and put the guide tube into the intermediate case, vane 8.

NOTE: The guide tube will need to be straightened by hand to go into

the vane.

Printed in Great Britain

RB.211−72−G448

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(c) Push the guide tube into the engine until the end of the guide tube is

in the cavity behind the stage 8 disc. The guide tube will then spring

back to its original shape.

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

emerges from the guide tube.

(e) Slowly move the borescope until you can see the balance land from

Direction 2 as shown in Fig.5.

CAUTION: MAKE SURE THAT THE BORESCOPE IS NOT IN THE PATH OF ANY ROTATING

COMPONENT WHEN YOU TURN THE ENGINE. IF THE BORESCOPE AND ROTATING

COMPONENT TOUCH, DAMAGE TO EITHER THE ROTATING COMPONENT OR

BORESCOPE WILL OCCUR.

(f) Use HU40324, turning tool to Slowly turn the IP compressor.

(g) Do an inspection of the balance land from Direction 2 over all the

circumference of the balance land.

NOTE: Together with the inspection from Direction 1 (refer to section

3.B.(2)), you must do an inspection of Zone A of the balance

land along the circumference. Refer to Fig.6.

(h) Look for cracks (refer to Fig.7 and Fig.8), dents or nicks and loose

balance weights (refer to Fig.9). For acceptance criteria refer to

section 3.B.(4).

NOTE: Carefully examine the area around the balance weights.

Carefully examine all around the edge of the clamp plate to

make sure there is no cracking underneath the clamp plate.

(i) Record the results in Appendix 1.

(j) Remove borescope until the viewing tip is inside the guide tube and

then remove the borescope and guide tube from the intermediate case

vane 8.

(4) Acceptance Criteria

Cracked Reject

Dents or nicks Reject

Loose balance weights Reject

(5) Install the IP8 buffer air tube (EIPC 75-22-49, Fig/Item 21-100).

(a) Clean mating faces of the tube flange and the intermediate case

diaphragm. Refer to OP TASK 70-00-00, OP101.

Printed in Great Britain

RB.211−72−G448

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(b) Apply a thin layer of OMat 4/46, jointing compound to the mating faces

of the flange and the compressor intermediate case diaphragm. Refer to

Fig.2.

(c) Let OMat 4/46, jointing compound dry for a minimum of 10 minutes.

(d) Make sure all of OMat 4/46, jointing compound is removed from the bolt

holes.

(e) Connect the tube to the compressor intermediate case diaphragm with

bolts (EIPC 75-22-49, Fig/Item 21-114) 2 off and washers (EIPC

75-22-49, Fig/Item 21-112 and 21-113). Refer to Fig.1.

(f) Torque bolts (EIPC 75-22-49, Fig/Item 21-114) to 11,5 Nm (100 lbfin.).

(g) After 10 minutes, torque the bolts (EIPC 75-22-49, Fig/Item 21-114)

again to 11,5 Nm (100 lbfin.).

(h) Install tube (EIPC 75-22-49, Fig/Item 21-100) to the compressor

intermediate case (EIPC 72-33-10, Fig/Item 02-500) with bolts (EIPC

75-22-49, Fig/Item 21-106) 3 off. Refer to Fig.1.

(i) Torque bolts to (EIPC 75-22-49, Fig/Item 21-106) to 11,5 Nm (100

lbfin).

(j) Connect tube (EIPC 75-22-49, Fig/Item 21-100) to the bracket (EIPC

75-33-16, Fig/Item 01-010) at clip position CP101919. Refer to Fig.3.

(k) Torque nut (EIPC 72-22-49, Fig/Item 21-132) to 6,2 Nm (55 lbfin.).

(l) Connect tube (EIPC 75-22-49, Fig/Item 21-500) to tube (EIPC 75-22-49,

Fig/Item 21-100). Refer to Fig.1.

(m) Torque union nut on tube (EIPC 75-22-49, Fig/Item 21-500) to 67 Nm

(590 lbfin.).

(n) Safety union nut on tube (EIPC 75-22-49, Fig/Item 21-500) with OMat

2/142, safety cable.

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

recorded in the engine logbook.

(7) Record the results of the inspection in Appendix 1.

Printed in Great Britain

RB.211−72−G448

Page 11

Jul 26/10

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C. 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.

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.

NOTE: If parts have already been disassembled or the applicable system is not

available, some steps will not be required.

(1) Get access to the compressor intermediate case.

(a) Disassemble and retain 6 clip positions CP210106, CP210107, CP210101,

CP210100, CP210104 and CP210105. Refer to Engine Manual, 72-00-13,

Clip Position Data and Fig.4.

(b) Disconnect air tube (EIPC 75-22-49, Fig/Item 13-100) from the two IP8

air tubes (EIPC 75-22-49, Fig/Item 13-500 and 13-700). Refer to Fig.4.

(c) Remove and retain bolts (EIPC 75-22-49, Fig/Item 13-106) 2 off and the

bolt (EIPC 75-22-49, Fig/Item 13-107) that connects tube (EIPC

75-22-49, Fig/Item 13-100) to the compressor intermediate case. Refer

to Fig.4.

(d) Remove IP8 air tube (EIPC 75-22-49, Fig/Item 13-100).

(2) Do the borescope inspection of the IP compressor stage 8 disc balance land

from Direction 1.

(a) Put 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.

(b) Slowly move the borescope to view the balance land from Direction 1 as

shown in Fig.5.

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CAUTION: MAKE SURE THAT THE BORESCOPE IS NOT IN THE PATH OF ANY ROTATING

COMPONENT WHEN YOU TURN THE ENGINE. IF THE BORESCOPE AND ROTATING

COMPONENT TOUCH, DAMAGE TO EITHER THE ROTATING COMPONENT OR

BORESCOPE WILL OCCUR.

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

the balance land from Direction 1 over all the circumference of the

balance land.

NOTE: Together with the inspection from Direction 2 (refer to section

3.C.(3)), you must do an inspection of Zone A of the balance

land along the circumference. Refer to Fig.6.

(d) Look for cracks (refer to Fig.7 and Fig.8), dents or nicks and loose

balance weights (refer to Fig.9). For acceptance criteria refer to

section 3.C.(4).

NOTE: Carefully examine the area around the balance weights.

Carefully examine all around the edge of the clamp plate to

make sure there is no cracking underneath the clamp plate.

(e) Record the results in Appendix 1.

(f) Remove the borescope from the intermediate case.

(3) Do the borescope inspection of the IP Compressor stage 8 disc balance land

from Direction 2.

(a) Put borescope with a side viewing tip fitted into HU82346, guide tube

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

(b) Make sure the curved end of the guide tube is towards the front of the

engine and put the guide tube into the intermediate case IP8 offtake

hole.

NOTE: The guide tube will need to be straightened by hand to go into

the vane.

(c) Push guide tube into the engine until the end of the guide tube is in

the cavity behind the stage 8 disc. The guide tube will then spring

back to its original shape.

(d) Push borescope through the guide tube until the viewing tip emerges

from the guide tube.

(e) Slowly move the borescope until it views the balance land from

Direction 2 as shown in Fig.5.

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CAUTION: MAKE SURE THAT THE BORESCOPE IS NOT IN THE PATH OF ANY ROTATING

COMPONENT WHEN YOU TURN THE ENGINE. IF THE BORESCOPE AND ROTATING

COMPONENT TOUCH, DAMAGE TO EITHER THE ROTATING COMPONENT OR

BORESCOPE WILL OCCUR.

(f) Use HU43985 turning tool to slowly turn the IP Compressor.

(g) Do an inspection of the balance land from Direction 2 along the

circumference of the balance land.

NOTE: Together with inspection from Direction 1 (refer to section

3.C.(2)), do an inspection of Zone A of the balance land along

the circumference. Refer to Fig.6.

(h) Look for cracks (refer to Fig.7 and Fig.8), dents or nicks and loose

balance weights (refer to Fig.9). For acceptance criteria refer to

section 3.C.(4).

NOTE: Carefully examine the area around the balance weights.

Carefully examine all around the edge of the clamp plate to

make sure there is no cracking underneath the clamp plate.

(i) Record the results in Appendix 1.

(j) Remove borescope until the viewing tip is inside the guide tube and

then remove the borescope and guide tube through the intermediate

case.

(4) Acceptance criteria

Cracked Reject

Dents or nicks Reject

Loose balance weights Reject

(5) Install the IP8 air tube (EIPC 75-22-49, Fig/Item 13-100).

(a) Connect tube (EIPC 75-22-49, Fig/Item 13-100) to tube (EIPC 75-22-49,

Fig/Item 13-700) and tube (EIPC 75-22-49, Fig/Item 13-500). Refer to

Fig.4.

(b) Connect tube (EIPC 75-22-49, Fig/Item 13-100) to the compressor

intermediate case with the bolts (EIPC 75-22-49, Fig/Item 13-106) 2

off and bolt (EIPC 75-22-49, Fig/Item 13-107). Refer to Fig.4.

(c) Torque the bolts (EIPC 75-22-49, Fig/Item 13-106) 2 off and bolt (EIPC

75-22-49, Fig/Item 13-107) to 11,5 Nm (100 lbfin.).

(d) Assemble the clip positions CP210106, CP210107, CP210101, CP210100,

CP210104 and CP210105. Refer to Engine Manual, 72-00-13, Clip Position

Data and Fig.4.

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(e) Torque tube nut on tube (EIPC 75-22-49, Fig/Item 13-700) that connects

to tube (EIPC 75-22-49, Fig/Item 13-100) to 84,0 Nm (61.9 lbfft.).

(f) Torque tube nut on tube (EIPC 75-22-49, Fig/Item 13-500) that connects

to tube (EIPC 75-22-49, Fig/Item 13-100) to 61,0 Nm (540 lbfin.).

(g) Safety tubes (EIPC 75-22-49, Fig/Item 13-500) and (EIPC 75-22-49,

Fig/Item 13-700) with OMat 2/142, safety cable.

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

recorded in the engine logbook.

(7) Record the results of the inspection in Appendix 1.

D. Eddy Current Inspection of Trent 500 and Trent 900 Engines.

CAUTION: YOU MUST USE CLEAN COTTON GLOVES WHEN YOU TOUCH THE IP COMPRESSOR SHAFT.

(1) Remove and inspect fitted balance weight assemblies.

(a) Make a careful record of which balance weight and clamp are fitted at

each position. Use an OMat 261, temporary marker to show the position

of each balance weight on the shaft. Refer to TSD 594J, 70-00-00,

OP363.

(b) Record the position and weight of each of the balance weights in

Appendix 2 for reference during the assembly procedure.

(c) Remove balance weight assemblies (balance weight (EIPC 72-32-31,

Fig/Item 01-415, 01-417, 01-419, 01-421, 01-423, 01-425 and 01-427),

clamp (EIPC 72-32-31, Fig/Item 01-455), washer (EIPC 72-32-31,

Fig/Item 01-452) and bolt (EIPC 72-32-31, Fig/Item 01-450)) from the

balance land.

(d) Clean the balance weights and clamps in accordance with:

TRENT 500 EM, 72-32-31, Cleaning

TRENT 900 CIR Manual, 72-32-31, Cleaning

(e) Do an inspection of the balance weights for frettage.

No frettage (galling) Accept, retain weights and

discard bolts and washers

Frettage (galling) Reject

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Balance weight rejected Find and record the weight of the

rejected balance weight assembly

(balance weight (EIPC 72-32-31,

Fig/Item 01-415, 01-417, 01-419,

01-421, 01-423, 01-425 and

01-427), clamp (EIPC 72-32-31,

Fig/Item 01-455), washer (EIPC

72-32-31, Fig/Item 01-452) and

bolt (EIPC 72-32-31, Fig/Item

01-450)). This is to help the

Assembly process

(f) Do an inspection of the clamps for bending and damage.

No damage and not bent Accept

Damaged or Bent Reject

(2) Clean the balance land

(a) Do an inspection of the balance land recess (refer to Fig.16). If the

IP compressor shaft has not been cleaned, deposits in this recess will

prevent the movement of the eddy current tool carriage.

(b) Clean the balance land recess with OMat 154, cold paint stripper, in

accordance with Overhaul Processes Manual TSD594J 70-00-00, OP117, if

required, until all deposits are removed.

(c) Remove all of OMat 154, cold paint stripper, as damage to the rubber

tyres of the eddy current tool carriage can occur.

(3) Prepare for eddy Current Inspection.

(a) Make sure the balance land is sufficiently clean to let the eddy

current tool carriage move and make sure the balance weights are

removed.

(b) Find the centre of the IPC stage 8 blade loading slot. This is the

datum position of the IPC8 disc when performing the inspection.

(c) Set the Eddy Current instrument switch to on and leave it to warm up

for 10 minutes or in accordance with the manufacturers instructions.

Set the display to X-Y.

R PTFE adhesive tape on the face of the probe MDK1 H-1803.03.1 (d) Put the

as shown in Fig.10.

(e) Fit probe MDK-1 H-1803.03.1 into probe holder make sure the probes

positioning pin safely locks into one of the probe holders positioning

pin slots. Refer to Fig.11.

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(4) Initial probe / instrument set-up required for new probe / instrument

combination.

(a) Connect the probe to instrument cable.

NOTE: When the Eddy Current instrument has been on for 10 minutes or

in accordance with the manufacturers instructions.

(b) Set the instruments FREQUENCY to 3.0Mhz

(c) Set the instrument up for the correct probe type and set the optimum

instrument conditions.

(d) Set the display spot position to the centre of the screen and the spot

persistence to 1.0 seconds.

(e) Push the FILTER button and set the HIGHPASS FILTER to Off, set the

LOWPASS FILTER to 80Hz.

(f) Adjust the Phase Angle and Sensitivity controls for the inspection

requirements of the individual probe.

(g) Set the Preamp to 0dB, Main amp to 21dB, Axis Spread to 0dB giving

Total Gain 21dB. These gain values are estimates and will possibly

need adjusting for the individual instruments to make sure a signal

from the notch, not exceeding full screen height (FSH), can be seen.

(5) Calibration before inspection (Red Dot / White Dot set-up).

(a) Set up the instrument according to the data card, Appendix 3 (or

similar form) for the probe to be used. Make sure that all items have

been set up correctly. Set display to X-Y.

(b) Check the condition of the probe coil spring and all the support wheel

tyres on the carriage. Refer to Fig.12.

(c) Pull out and slowly turn the probe in the probe holder until the red

dot on the probe aligns with the red dot on the probe holder.

(d) Push the probe into the probe holder until the positioning pin

securely locks into the positioning slot.

(e) Connect the probe to instrument cable.

(f) Loosen the knurled screw and slide the probe and block assembly around

the slot in the positioning plate to the white dot position.

(g) Slowly turn the probe and block assembly until the locking pin in

block B engages into the positioning plate. Check that the white dot

on block B aligns with the white dot on the positioning plate.

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(h) Tighten the knurled screw.

(i) Turn thumbscrew A and thumbscrew B to align their datum lines to the

correct position as shown in Fig.13.

(j) Put the probe onto the surface of the calibration block (HU44792 for

Trent 500 and HU44796 for Trent 900) with the probe coil set

approximately central to the width of the face, away from the EDM

Notch. Refer to Fig.14.

(k) Move the probe over the notch in the face of the calibration block,

and adjust the signal phase angle such that it is 10 degrees from the

Vertical. Refer to Fig.15.

R

R

R

(l) Push the probe down lightly and NULL the probe. Lift the probe a small

distance from the surface and observe the lift off signal. Movement

should be

R

R from left to right at an angle between the 3 o'clock and 6

o'clock position.

R

R

(m) With the notch detected, adjust the Gain control to change the

amplitude from the notch to approximately 100 per cent full screen

height (FSH). Refer to Fig.15.

(n) The sensitivity is correctly set when the maximised signal from the

target rises to 100 per cent FSH as the probe is passed over the

notch.

(o) Do not use the probe if correct sensitivity cannot be set, until the

reason for the change has been determined.

(p) Record instrument settings data on the Data Card, Appendix 3 (or

similar form).

(6) Balance land rear face inspection (Red Dot set-up).

(a) Set up the instrument according to the data card (Appendix 3) for the

probe and instrument combination to be used.

(b) Confirm that all items have been set up correctly.

(c) Set the display to X-Y.

R PTFE adhesive tape is fitted to the face of the probe (d) Make sure the

and in good condition, replace if necessary.

(e) Make sure the condition of the probe coil spring and all the support

wheel tyres are satisfactory.

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(f) Pull out and slowly turn the probe in the probe holder until the red

dot on the probe aligns with the red dot on the probe holder. Do not

disconnect the cable.

NOTE: If the cable is disconnected the signal can be affected and the

probe should be recalibrated.

(g) Push the probe into the probe holder until the positioning pin safely

locks into the positioning slot.

(h) Loosen the knurled screw and slide the probe and block assembly around

the slot in the positioning plate to the red dot position.

(i) Slowly turn the probe and block assembly until the locking pin in

block B engages into the positioning plate.

(j) Make sure that the red dot on block B aligns with the red dot on the

positioning plate.

(k) Tighten the knurled screw.

(l) Turn thumbscrew A and thumbscrew B to align their datum lines to the

correct position as shown in Fig.18.

R (m) Find the stage 8 discs datum position. Refer to section 3.D.(3).(b).

(n) Carefully place the probe carriage over the balance land and locate

the large horizontal wheel in the balance land recess. Refer to Fig.17

and Fig.18.

(o) Push down on the carriage until the probe tip is seated flush with the

surface.

(p) Null the probe. See if the probe is touching by lifting the probe

R holder a small distance from the surface. This must lead to a large

movement of the spot on the display screen at an angle between the 3

o'clock and 6 o'clock position.

R

R

(q) Push the probe trolley around the balance land to perform the scan.

Start from the datum position.

(r) Make sure you do a full 360 degree inspection of the balance land.

NOTE: The probe must always be moving at approximately 5 cm to 15 cm

per second to detect cracking. Special attention must be paid

to the areas where the balance weight(s) were removed.

(s) If you turn the trolley around the balance land in one direction only,

make sure the cable does not become wound up.

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(t) Set the probe to the next increment by turning Thumbscrew A half a

turn counter clockwise. This increments the probe radially inwards.

(u) Make sure the datum line on the probe holder has moved with respect to

the vernier marks on Block A. Refer to Fig.18 (view B).

(v) The scan starts from the radially outward edge of the face and

R increments radially inwards. Repeat sections 3.D.(6)(q) to 3.D.(6)(u)

R until the complete face is inspected. The complete face must be

R inspected. This will typically require 12 scan increments.

(w) Record any crack indications seen in Appendix 2. If an indication is

R seen, refer to Accomplishment Instructions, 3.D.(9) and 3.D.(10).

(7) Land Recess Outside Diameter Inspection (White Dot set-up).

(a) Set up the instrument according to the data card (Appendix 3) for the

probe and instrument combination to be used.

(b) Confirm that all items are set up correctly.

(c) Set the display to X-Y.

R PTFE adhesive tape is fitted to the face of the probe (d) Make sure the

and in good condition, replace if necessary.

(e) Check the condition of the probe coil spring and all the support wheel

tyres.

(f) Without disconnecting the cable, pull out and slowly turn the probe in

the probe holder until the white dot on the probe aligns with the

white dot on the probe holder.

NOTE: If the cable is disconnected the signal can be affected and the

probe must be recalibrated.

(g) Push the probe into the probe holder until the positioning pin

securely locks into the positioning slot.

(h) Loosen the knurled screw and slide the probe and block assembly around

the slot in the positioning plate to the white dot position.

(i) Slowly turn the probe and block assembly until the locking pin in

block B engages into the positioning plate.

(j) Make sure the white dot on block B aligns with the white dot on the

positioning plate.

(k) Tighten the knurled screw.

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(l) Turn thumbscrew A and thumbscrew B to align their datum lines to the

correct position as shown in Fig.20.

(m) Identify the stage 8 discs datum position. Refer to section

R 3.D.(3).(b).

(n) Carefully place the probe carriage on the balance land and engage the

large horizontal wheel in the balance land recess. Refer to Fig.19 and

Fig.20.

(o) Push down on the probe until it is seated on the outside diameter

face.

(p) Null the probe. See if the probe is touching by lifting the probe

R holder a small distance from the surface, which must lead to a large

movement of the spot on the display screen at an angle between the 3

o'clock and 6 o'clock position.

R

R

(q) Starting from the datum position, push the probe trolley around the

balance land to perform the scan.

(r) Make sure you do a full 360 degree inspection of the balance land.

NOTE: The probe must always be moving at approximately 5 cm to 15 cm

per second to detect cracking. Special attention must be paid

to the areas where the balance weight(s) were removed.

(s) If you turn the trolley around the balance land in one direction only,

make sure the cable does not become wound up.

(t) Set the probe to the next increment by turning Thumbscrew A half a

turn anticlockwise. This increments the probe axially forwards.

(u) Make sure the datum line on the probe holder has moved with respect to

the vernier marks on Block A. Refer to Fig.20 (view B).

(v) The scan starts from the rearwards edge of the outer diameter face and

increments forwards towards the disc diaphragm. Repeat sections

R to 3.D.(7)(u) until the complete face is inspected. The 3.D.(7)(q)

complete face

R

R must be inspected. This will typically require 6 scan

R increments.

(w) Record any crack indications seen in Appendix 2. If an indication is

R seen, refer to Accomplishment Instructions, 3.D.(9) and 3.D.(10).

(8) Balance Land Chamfer Face Inspection (Blue Dot set-up).

(a) Set up the instrument according to the data card (Appendix 3) for the

probe and instrument combination to be used.

(b) Make sure that all items are set up correctly.

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(c) Set the display to X-Y.

R PTFE adhesive tape is fitted to the face of the probe (d) Make sure the

and in good condition, replace if necessary.

(e) Check the condition of the probe coil spring and all the support wheel

tyres.

(f) Pull out and slowly turn the probe in the probe holder until the blue

dot on the probe aligns with the blue dot on the probe holder. Do not

disconnect the cable.

NOTE: If the cable is disconnected the signal can be affected and the

probe must be recalibrated.

(g) Push the probe into the probe holder until the positioning pin safely

locks into the positioning slot.

(h) Loosen the knurled screw and slide the probe and block assembly around

the slot in the positioning plate to the blue dot position.

(i) Slowly turn the probe and block assembly until the locking pin in

block B engages into the positioning plate.

(j) Make sure the blue dot on block B aligns with the blue dot on the

positioning plate.

(k) Tighten the knurled screw.

(l) Turn thumbscrew A and thumbscrew B to align their datum lines to the

correct position as shown in Fig.22.

R (m) Find the stage 8 discs datum position. Refer to section 3.D.(3).(b).

(n) Carefully place the probe carriage on the balance land and engage the

large horizontal wheel in the balance land recess. Refer to Fig.21 and

Fig.22.

(o) Push down on the probe until it is seated on the chamfer face.

(p) Null the probe. See if the probe is touching by lifting the probe

R holder a small distance from the surface, which must lead to a large

movement of the spot on the display screen at an angle between the 3

o'clock and 6 o'clock position.

R

R

(q) Push the probe trolley around the balance land to perform the scan.

Start from the datum position.

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(r) Make sure you do a full 360 degrees inspection of the balance land.

NOTE: The probe must always be moving at approximately 5 cm to 15 cm

per second to detect any cracking. Special attention must be

paid to the areas where the balance weight(s) were removed.

(s) If you turn the trolley around the balance land in one direction only,

make sure the cable does not become wound up.

(t) Set the probe to the next increment by turning Thumbscrew B half a

turn clockwise. This increments the probe towards the disc.

(u) Make sure the datum line on block A has moved with respect to the

vernier marks on block B. Refer to Fig.22 (view B).

(v) The scan starts from the rearward edge of the chamfer face and

R increments forwards towards the disc. Repeat sections 3.D.(8)(q) to

R until the complete face is inspected. The complete face 3.D.(8)(u)

R must be inspected. This will typically require 4 scan increments.

(w) Record any crack indications seen in Appendix 2. If an indication is

R seen, refer to Accomplishment Instructions, 3.D.(9) and 3.D.(10).

R (x) Do a post inspection calibration check by performing section 3.D.(5).

If the signal result is not the same as the calibration result before

R inspection, then calibrate again in accordance with section 3.D.(5)

and a full inspection of the balance land is required.

(9) Interpretation of the Eddy Current Instrument CRT Screen Display.

(a) Defects will be seen again and again and show on the X-Y display as a

signal rising between vertical and 10 degrees from the vertical from

the centre spot, as the probe passes over the defect (refer to

Fig.23). To confirm an indication as genuine, make sure the area is

clean and the signal is seen again and again.

(b) Transient signals can be seen which can look similar to defects. You

can ignore these signals as they will not be seen again and again.

(c) As the probe passes over the scallop areas of the balance land face

(refer to Fig.21 view A), a signal moving in a downward and opposite

direction to a defect indication will be seen. Refer to Fig.24.

(d) Carefully monitor as defects can occur within the scalloped area.

Refer to Fig.25 for example of defects within a scallop area.

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(10) Determining if an indication is spurious or genuine

R If an indication is found in section 3.D.(6), (7) or (8), and

R passes the inspections in section 3.D.(9), then use the following

procedure to determine if the indication is spurious or a genuine

crack signal.

(a) Set the HIGHPASS FILTER to ON and set the frequency to 5 Hz.

(b) Set the LOWPASS FILTER frequency to 50 Hz.

(c) Set up the inspection tool ready for use on the calibration block in

R to 3.D.(5)(i). accordance with 3.D.(5)(c)

(d) Put the probe onto the surface of the calibration block (HU44792 for

Trent 500 and HU44796 for Trent 900) with the probe coil set

approximately central to the width of the face, away from the EDM

notch. refer to Fig.14.

(e) Push the probe down lightly and NULL the probe.

(f) Move the probe over the notch in the face of the calibration block and

adjust the phase angle so that the notch signal is vertical.

(g) Adjust the gain so that the notch signal is at full screen height.

(h) Inspect the area on the balance land again only where the indication

was found:

(i) If a vertical signal is seen in this area, the indication must

be a genuine crack signal.

(ii) If no vertical signal can be seen in this area, then the

R indication found in section 3.D.(6), (7) or (8) must be a

spurious signal and must be ignored.

NOTE: With the HIGHPASS filter set to ON, the probe lift-off will

show as a vertical spot movement, therefore take care not

to interpret the lift-off of the probe as a crack signal.

(11) Acceptance criteria.

R If an indication is identified as a crack signal following steps 3.D.(9)

R the Shaft must be rejected. Do not complete section 3.D.(12) and 3.D.(10),

and perform any dressing repair of damage or fretting masks.

R

R The IP

compressor shaft, balance weights, clamp plates, washers and bolts must be

quarantined. The location shall be visually inspected and the results

reported to Rolls-Royce via your local representative.

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R (12) Do an inspection of the balance land.

(a) Do a visual inspection of the balance land rear face, chamfer face and

recess outside diameter (refer to Fig.16) look for damage, indentation

marks and galling. Use a 10x magnifying glass and a torch (if

required).

R

R

R

R

R (b) For acceptance criteria refer to:

R TRENT 500 Engine Manual, 72-32-31, Inspection

R TRENT 900 CIR Manual, 72-32-31, Inspection

(c) If the IP compressor shaft is rejected, quarantine the IP compressor

shaft, balance weights, clamp plates, washers and bolts. Photograph

the mark and send the image to Rolls-Royce via your local

representative.

R

R

R

R

(13) Install the balance weight and the clamp on IP Compressor Shaft (EIPC

72-32-31, Fig/Item 01-180), in the same position as removed.

(a) If one or all of the balance weights have been rejected following

inspection (refer to section 3.D.(1).(e)), a new balance weight must

be used. The weight of the new balance weight assembly (balance

weight, clamp, washer and bolt) must be within 0,1 g (0.003 oz) of the

original balance weight assembly.

(b) Install the balance weights (EIPC 72-32-31, Fig/Item 01-415, 01-417,

01-419, 01-421, 01-423, 01-425 and 01-427), clamp (EIPC 72-32-31,

Fig/Item 01-455) with new bolts (EIPC 72-32-31, Fig/Item 01-450) and

new locking washers (EIPC 72-32-31, Fig/Item 01-452) in the same

position as where they were removed from on the inspected and

serviceable IP compressor drum.

(c) Torque tighten the bolts to 4 Nm (35 lbfin.). Refer to Standard

Practices Manual, 70-51-00, Torque Tighten Components.

(d) Use the locking washers (EIPC 72-32-31, Fig/Item 01-452), to lock the

bolts (EIPC 72-32-31, Fig/Item 01-450), in position. Refer to Standard

Practices Manual, 70-12-04, Procedures used to Lock Threaded Parts.

(e) Make sure all temporary markings produced in section 3.D.(1) are

removed.

R (14) If one or all of the acceptance criteria in sections 3.D.(11) and 3.D.(12)

are not met; retain and quarantine the balance weights (EIPC 72-32-31,

Fig/Item 01-415, 01-417, 01-419, 01-421, 01-423, 01-425 and 01-427), clamp

(EIPC 72-32-31, Fig/Item 01-455), bolts (EIPC 72-32-31, Fig/Item 01-450),

locking washers (EIPC 72-32-31, Fig/Item 01-452) and IP compressor shaft

(EIPC 72-32-31, Fig/Item 01-180). Refer to Rolls-Royce via your local

representative within 2 weeks of the inspection.

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(15) Record the condition of the balance land on the attached inspection sheet

provided in Appendix 2 or similar form.

E. Accomplishment of this Non-Modification Service Bulletin is to be recorded in

the engine logbook.

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Trent 500 - Location of IP8 Buffer Air Tube

Fig.1

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Jointing Compound Application

Fig.2

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Clip Position CP101919

Fig.3

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deh0009427

210106

210107

210101 210100 210104

210103

210105

A

B

B

A

COMPRESSOR

INTERMEDIATE

CASE

72−33−10

TUBE

FW48296

13−500

TUBE

FW24803

13−100

TUBE

FW30489

13−700

BOLT

AS48512

13−107

BOLT

AS48528

13−106

(2 off)

TUBE

FW24803

13−100

NOTE:

All IPC Fig/Item numbers are 75−22−49 unless identified differently

NOTE: 

All Chapter−Section−Subject and Fig−Item references 

are quoted for the Engine IPC 

 

02−500

SB 72−C994

FW18047

SB 72−D131

FW15202

SB 72−F434 PTI

FW62836

SB 72−F434 PT2

FW63495

Trent 900 - Location of IP8 Buffer Air Tube

Fig.4

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Trent 500 and Trent 900 - Borescope View Directions

Fig.5

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Trent 500 and Trent 900 - Inspection of Zone A

Fig.6

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Previously Seen Crack Position on Trent 700 Engine

Fig.7

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Previously Seen Crack Position on Trent 800 Engine

Fig.8

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Correctly Fitted Balance Weight

Fig.9

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Teflon Tape Attached to Probe

Fig.10

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Probe Positioning Pin and Probe Holder Positioning Pin Slot

Fig.11

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Eddy Current Inspection Tool

Fig.12

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Eddy Current Tool Positioned for Calibration

Fig.13

Printed in Great Britain

RB.211−72−G448

Page 39

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Eddy Current Calibration Block - HU44792 (Trent 500) and HU44796 (Trent 900)

Fig.14

Printed in Great Britain

RB.211−72−G448

Page 40

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Typical Calibration Display

Fig.15

Printed in Great Britain

RB.211−72−G448

Page 41

Jul 26/10

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Trent 500 and Trent 900 - Balance Land Inspection Zones

Fig.16

Printed in Great Britain

RB.211−72−G448

Page 42

Jul 26/10

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Probe Placed to Inspect Balance Land Rear Face

Fig.17

Printed in Great Britain

RB.211−72−G448

Page 43

Jul 26/10

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R

R Probe Placed to Inspect Balance Land Rear Face

R Fig.18

Printed in Great Britain

RB.211−72−G448

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Jul 26/10

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R

R Probe Placed to Inspect Balance Land Recess Outside Diameter

R Fig.19

Printed in Great Britain

RB.211−72−G448

Page 45

Jul 26/10

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R

R Probe Placed to Inspect Balance Land Recess Outside Diameter

R Fig.20

Printed in Great Britain

RB.211−72−G448

Page 46

Jul 26/10

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Probe Placed to Inspect Balance Land Chamfer Face

Fig.21

Printed in Great Britain

RB.211−72−G448

Page 47

Jul 26/10

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Probe Placed to Inspect Balance Land Chamfer Face

Fig.22

Printed in Great Britain

RB.211−72−G448

Page 48

Jul 26/10

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Defect Indication in Outside Diameter as Seen on Screen Display

Fig.23

Printed in Great Britain

RB.211−72−G448

Page 49

Jul 26/10

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Typical Screen Display as the Probe Passes Over a Scallop Area

Fig.24

Printed in Great Britain

RB.211−72−G448

Page 50

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Defect Indication Within a Scallop Area

Fig.25

Printed in Great Britain

RB.211−72−G448

Page 51

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Trent 500 or Trent 900 Visual Borescope Inspection Results

1. This Form is to be completed for every engine inspected in accordance with

Accomplishment Instructions (3.B. or 3.C.).

2. Results to be sent to Rolls-Royce via your local representative.

See over

APPENDIX 1

Printed in Great Britain

RB.211−72−G448

Appendix 1 - Page 1 of 2

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Borescope Inspection - Feedback Sheet

Printed in Great Britain

RB.211−72−G448

Appendix 1 - Page 2

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Trent 500 or Trent 900 Eddy Current Inspection Results

1. This Form is to be completed for every shaft inspected in accordance with

Accomplishment Instructions (3.D.).

2. Results to be sent to Rolls-Royce via your local representative.

See over

APPENDIX 2

Printed in Great Britain

RB.211−72−G448

Appendix 2 - Page 1 of 2

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R

R Eddy Current Inspection - Feedback Sheet

Printed in Great Britain

RB.211−72−G448

Appendix 2 - Page 2

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NDT Data Card - Eddy Current Inspection Results

1. This Form is to be completed for each new combination of probe and instrument.

2. Results to be retained at the overhaul base.

See over

APPENDIX 3

Printed in Great Britain

RB.211−72−G448

Appendix 3 - Page 1 of 2

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NDT Data Card

Printed in Great Britain

RB.211−72−G448

Appendix 3 - Page 2

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