# Rolls-Royce Service Bulletin 72-K571: No revision named

- Rights: © Rolls-Royce plc. Filed by the FAA in regulations.gov docket FAA-2021-1164, the docket of AD 2022-08-16. Not covered by OpenAirDocs’ CC0 dedication.
- Document: [Rolls-Royce Service Bulletin 72-K571](https://openairdocs.org/service-documents/rolls-royce/72-k571.md)
- Title as filed: Rolls-Royce Trent 1000 SB 72-K571
- Pages: 62
- PDF: https://openairdocs.org/files/sha256/08/d7/08d7ca15d6e550a39972d16ae7c84743fdb9ec20ef0d98abdc5f24439f605a04
- Page: https://openairdocs.org/service-documents/rolls-royce/72-k571/file/08d7ca15d6e5

## Text

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### Page 1

This document transmits the Initial Issue of Service Bulletin TRENT1000-72-K571
and the Initial Issue of the Supplement
Bulletin Initial Issue
Remove Incorporate Reason for change
Pages 1 to 58 of the
Service Bulletin
Initial Issue
Supplement Initial Issue
Remove Incorporate Reason for change
Page 1 Initial Issue
Printed in Great Britain
Jun.15/21
TRENT 1000 SERIES PROPULSION SYSTEMS SERVICE BULLETIN
TRENT 1000 72−K571
Transmittal - Page 1 of 3
Date

### Page 2

LIST OF EFFECTIVE PAGES
The effective pages to this Service Bulletin are as follows:
Page Revision Number Revision Date
Bulletin
1 Jun.15/21
2 Jun.15/21
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46 Jun.15/21
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Supplement
1 Jun.15/21
Printed in Great Britain
TRENT 1000 72−K571
Transmittal - Page 3

### Page 4

1. Planning Information
A. Effectivity
Boeing 787
TRENT1000-AE3 Engines prior to Serial No.11466.
TRENT1000-CE3 Engines prior to Serial No.11466.
TRENT1000-D3 Engines prior to Serial No.11466.
TRENT1000-G3 Engines prior to Serial No.11466.
TRENT1000-H3 Engines prior to Serial No.11466.
TRENT1000-J3 Engines prior to Serial No.11466.
TRENT1000-K3 Engines prior to Serial No.11466.
TRENT1000-L3 Engines prior to Serial No.11466.
TRENT1000-M3 Engines prior to Serial No.11466.
TRENT1000-N3 Engines prior to Serial No.11466.
TRENT1000-P3 Engines prior to Serial No.11466.
TRENT1000-Q3 Engines prior to Serial No.11466.
TRENT1000-R3 Engines prior to Serial No.11466.
TRENT1000, M32100836, M32101261, M32 Modules.
B. Concurrent Requirements
None.
C. Reason
(1) Problem
The current standard of Intermediate Pressure (IP) compressor stages 1 to
8 rotor shaft assembly is susceptible to high cycle fatigue cracking
travelling axially rearwards from the front edge of the front seal. This
cracking may result in reduced stage 1 disc integrity.
ENGINE - IP COMPRESSOR SHAFT - INTRODUCTION OF AN IP COMPRESSOR STAGES 1 TO 8 ROTOR
SHAFT ASSEMBLY FEATURING REVISED FRONT SEAL GEOMETRY - MOD.72-K571
Printed in Great Britain
TRENT 1000 72−K571
Page 1 of 58
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### Page 5

The problem is attributed to:
(a) Frequency alignment with the acoustic resonance of the cavity
downstream of the IP Compressor front seal.
(b) Seal instability as a result of an acoustic bite from the interaction
with the acoustic resonance of the cavity downstream of the IP
Compressor front seal.
(c) A feedback mechanism between the IP Compressor front seal and buffer
seal involving the buffer seal exciting an inner cavity acoustic mode,
which successively excites the front seal.
(2) Evidence
The problem has been identified on in-service and development programme
engines with maximum crack lengths ranging between 5,4 mm (0.21 in.) and
6,3 mm (0.25 in.).
In addition, the problem has been observed in the flight test development
programme of one other Rolls-Royce Trent series engine with a similar
design of IP Compressor stages 1 to 8 rotor shaft assembly, with a maximum
crack length of 8,34 mm (0.33 in.).
(3) Substantiation
The changes introduced by this Service Bulletin have been the subject of
satisfactory engineering evaluation, including stress, vibration and
thermals analysis.
(4) Objective
Incorporation of this Service Bulletin (Modification) is designed to
maintain reliability.
(5) Effect of Bulletin on:
(a) Operation
Not affected.
(b) Maintenance
Not affected.
(c) Overhaul
Affected (see 1.L. Other Publications Affected).
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### Page 6

(d) Repair Schemes
Affected (affected Repair Schemes will be revised to include the
part(s) introduced by this Service Bulletin).
(e) Interchangeability
Affected (see 1.M. Interchangeability of Parts).
D. Description
(1) The changes are:
(a) A revised IP compressor stages 1 to 8 rotor shaft assembly is
introduced similar to the existing item except for:
(i) The number of seal fins on the front seal is reduced from 4 to
3 resulting in the axial length of the seal arm to be reduced
by 9,05 mm (0.36 in.).
(ii) A chamfer is introduced on upper and lower front edges of the
front seal.
(2) Existing IP compressor stages 1 to 8 rotor shaft assemblies may be
reworked. The rework standard features identical changes as the new
production standard except for a radius feature on the upper front edge
that is a result of machining the part, and a machining tolerance of
Plus/Minus 0.3 mm (0.01 in.) is applied. Additionally, the upper and lower
front edges of the machined part are deburred.
(3) This Service Bulletin is in two parts as follows:
(a) Part 1
New production and in-service applications.
(b) Part 2
The application of a reworked standard of IP Compressor stages 1 to 8
rotor shaft assembly.
(4) For effect on declared life see Time Limits Manual 05-10-01.
E. Compliance
(1) ON-WING
Not applicable.
Printed in Great Britain
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### Page 7

(2) IN-SHOP
RECOMMENDED
It is recommended that this Service Bulletin be accomplished on
engines/powerplants at Module 32 Level 2 (Check and Repair and Hospital
Shop Visits) provided that the module is disassembled sufficiently to
expose the front face of the IP Compressor rotor assembly or Level 3
(Engine Refurbishment) or Level 4 (Engine Overhaul).
F. Approval
The technical content of Modification 72-K571 was approved by a representative
of the European Union Aviation Safety Agency (EASA) on May.21/21, EASA
certificate No. EASA.C.10076524.
G. Manpower
(1) On-wing
Not applicable.
(2) In-shop
12 man-hours - (Estimated)
NOTE: The parts affected by this Service Bulletin are accessible In-shop.
H. Material Price and Availability
Modification kit not required; parts supplied as single line items.
For prices and availability of future spares see supplement to this bulletin.
I. Tooling, Price and Availability
Special tools are required.
J. Weight and Balance
(1) Weight Change
Minus 0,36 kg (0.8 lb).
(2) Moment Arm
150 mm (5.9 in.) forwards.
(3) Datum
Power Plant Station (PPS) 3000 mm (118.11 in.).
Printed in Great Britain
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### Page 8

K. References
Engine Manual, 72-32-30, Disassembly and Assembly.
L. Other Publications Affected
(1) For effect on Illustrated Parts Catalogue (IPC) see 2. Material
Information.
(2) Cleaning/Inspection and Repair Manual, 72-32-31, Inspection/Check.
(3) Time Limits Manual, 05-10-01 and 05-20-01.
M. Interchangeability of Parts
Affected (see 2.D.(1) Instruction disposition codes).
Printed in Great Britain
TRENT 1000 72−K571
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### Page 9

2. Material Information
A. The kit required consists of the following parts:
None.
B. Parts to be reworked:
All Engines and Modules
P a r t2o fS B
72-32-31
FIG
ITEM
NO.
NEW
PART
NO. QTY PART TITLE
OLD
PART
NO.
INSTR
DISP
01 450 LV18447 1 SHAFT, ASSY-ROTOR, STAGES
1T O8-I P COMP
KH18436 (1)
C. New production parts:
The following parts will be made available as future spares in addition to
those listed under B:
All Engines and Modules
P a r t1o fS B
72-32-31
FIG
ITEM
NO.
NEW
PART
NO. QTY PART TITLE
OLD
PART
NO.
INSTR
DISP
01 450 LV19601 1 SHAFT, ASSY-ROTOR, STAGES
1T O8-I P COMP
KH18436 (1)
D. Instruction disposition codes:
(1) 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
TRENT 1000 72−K571
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### Page 10

3. Accomplishment Instructions
A. The revised IP compressor stage 1 to 8 rotor shaft assembly introduced by this
Service Bulletin is one-way interchangeable (see 1.M. Interchangeability of
Parts). Remove the existing and install the new or reworked IP compressor stage
1 to 8 rotor shaft assembly in accordance with current overhaul procedures
(Engine Manual, 72-32-30, Disassembly and Assembly).
B. Rework the existing Intermediate Pressure (IP) Compressor Rotor Shaft Assembly
(KH18436) (IPC ATA 72-32-31, Fig/Item 01-450).
GENERAL DATA
CAUTION: THE IP COMPRESSOR ROTOR SHAFT MUST STAY CLEAN AND MUST HAVE NO
CONTAMINATION AT ALL TIMES. PUT ON CLEAN COTTON GLOVES BEFORE YOU TOUCH
THE SHAFT. WHEN THE PROCEDURE IS STOPPED OR COMPLETED, A COVER MUST BE
PUT ON THE SHAFT.
WARNING: MAKE SURE NECESSARY MASKING IS APPLIED, ELSE INJURY CAN OCCUR.
This TASK gives the procedure to modify the Intermediate Pressure (IP) Compressor
Rotor Shaft Assembly by machining the front seal arm.
Source demonstration is necessary for this rework. Only those companies who hold
letters of approval for this rework from Rolls-Royce plc are authorised to do
this rework. Vendors who hold this approval are listed in TSD 7019 (Authorised
Repair Vendor Directory). This source controlled rework and associated repair
vendor shop documentation are classified as fixed process documents and must be
controlled as specified in RRES90000.
Protect the part during Rework in between operations and after Rework in
accordance with OP TASK 70-00-00-300-340.
Overhaul Processes (OP) referenced in the text by TASK/SUBTASK number are
detailed in the Engine Overhaul Processes Manual (TSD594-J).
TASKS identified by SPM TASK are in the Standard Practices Manual.
This rework can be done by one of the below three parts:
Part 1: Rework with the Stages 1 and 2 blades removed, Stages 3 to 8 blades, IP
Compressor Front Stubshaft (KH36286) and Curvic (KH26324) installed.
Part 2: Rework in the piece part level.
Part 3: Rework with the Stages 1 to 8 blades, IP Compressor Front Stubshaft
(KH36286) and Curvic (KH26324) installed.
Printed in Great Britain
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### Page 11

This Service Bulletin requires the use of the RRT119749 lifter and RRT119747
shaft centraliser that can be used to machine the Trent 1000-TEN application
only. When using the RRT119747 shaft centraliser, there is no requirement to
remove the dampening ring.
This Service Bulletin permits the use of an alternative RRT119750 lifter and
RRT119748 shaft centraliser. This specific tooling can also be used for the Trent
7000 application. Use of the RRT119750 lifter and RRT119748 shaft centraliser
requires the removal of the RRT119756 dampening ring assembly before the lifter
is installed and re-installation of the dampening ring before the machining is
done. An RRT119754 lifting collar must be installed on the RRT119750 lifter
before the lifter is installed on a Trent 1000-TEN IP Compressor Front Stubshaft
(KH36286).
Equivalent locally manufactured tooling can be used. Agreement with Rolls-Royce
is necessary for the use of locally manufactured tooling.
Part 1 and Part 3 of this instruction require that no coolant is permitted to
ingress into the masked areas of the assembly. The vendor is to use an applicable
method to confirm that there is no ingress of coolant. The recommended method is
to apply litmus paper to the inside of the masked areas of the assembly.
With the agreement of Rolls-Royce, it is acceptable to change the build order of
the masking to apply shrink wrap before the polymer moulding tools and to apply
additional OMat 2/247 polyethylene tape or equivalent to get an improved seal, if
necessary.
Material of Component
Description RR Symbol Material
Intermediate Pressure (IP)
Compressor Rotor Shaft
Assembly
TJK Titanium Alloy
These rework instructions are controlled by RPR61138.
C. EQUIPMENT AND MATERIAL
(1) Standard Equipment
degreasing equipment
hand tools
heat gun
inspection equipment
locally made tooling
machining equipment
penetrant crack test equipment
swab etch equipment
suction equipment
vibration peen equipment
Printed in Great Britain
TRENT 1000 72−K571
Page 8
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### Page 12

x3 to x7 magnification equipment
(2) Consumable Materials
OMat 2/101 lint free cloth
OMat 2/247 polyethylene tape
OMat 5/28 waterproof silicon carbide
OMat 652
fluorescent penetrant ultra-high sensitivity,
post-emulsified
OMat 1099 coolant, heavy duty concentrate
OMat 1284 polyethylene shrink wrap
NOTE: 1. To identify consumable materials, refer to the Overhaul
Materials Manual (OMat).
2. Additional consumable materials are included in the Overhaul
Processes referenced within this rework.
(3) Expendable Parts
FIG/ITEM PART NO PART IDENT QTY
None.
(4) Rework Parts
FIG/ITEM PART NO PART IDENT QTY
None.
(5) Special Tools
TOOL NUMBER TOOL DESCRIPTION QTY
RRT026842 dummy shaft
RRT081238 polymer stage 2-3 seal fin protector
RRT081239 polymer stage 1-2 seal fin protector
RRT081240 polymer stage 3-4 seal fin protector
RRT081241 polymer stage 4-5 seal fin protector
RRT081243 polymer stage 6-7 seal fin protector
RRT091632 polymer stage 5-6 seal fin protector
RRT091633 polymer stage 7-8 seal fin protector
RRT119749 lifter
RRT119750 lifter
RRT119751 lifting eye tool
RRT119752 top hat clamp
RRT119753 polymer top hat cover
RRT119755 polymer trough
RRT119757 polymer front seal arm seal fin protector
RRT119758 polymer stage 1 dovetail protector
RRT119759 polymer stage 1 blade protector
Printed in Great Britain
TRENT 1000 72−K571
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### Page 13

RRT119760 polymer stage 2 dovetail protector
RRT119761 polymer stage 2 blade protector
RRT119762 polymer stage 3 blade protector
RRT119763 polymer stage 4 blade protector
RRT119764 polymer stage 5 blade protector
RRT119765 polymer stage 6 blade protector
RRT119766 polymer stage 7 blade protector
RRT119767 polymer stage 8 blade protector
RRT119768 polymer stage 8 seal fins protector
RRT086197 adapter
RRT119745 base plate
RRT119746 base plate nylon ring
RRT119747 shaft centraliser
RRT119748 shaft centraliser
RRT119754 lifting collar
RRT119756 dampening ring assembly
D. Rework Instructions
(1) Part 1 - Disassemble the IP
Compressor Rotor Assembly.
Refer to Figure 1.
Refer to EM TASK 72-32-30-040-801.
Disassemble the IP Compressor Rotor
Assembly sufficiently to remove the
IP Compressor Stage 1 and 2 blades
only.
Do not remove the IP Compressor Front
Stubshaft and Curvic Ring. Do not
remove the Stages 3 through 8
Compressor Blades.
(2) Part 1 - Crack test the part. Do a fluorescent penetrant inspection
of the front seal arm.
Refer to OP TASK 70-00-00-200-210.
Use OMat 652 fluorescent penetrant
ultra-high sensitivity,
post-emulsified and penetrant crack
test equipment.
If a crack is found in the IP
Compressor Rotor Shaft then
quarantine the part and refer to
Rolls-Royce plc.
(3) Part 1 - Examine the part. Refer to Figure 1 and Figure 13.
Do a dimensional inspection of the
Dimension X. Record the dimension in
the Engine log book against the
serial number of the part. Record the
measurement to 2 decimal places in
metric and 3 decimal places in
imperial.
Printed in Great Britain
TRENT 1000 72−K571
Page 10
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### Page 14

(4) Part 1 - Install the lifter to the
stubshaft.
Refer to Figure 14 and Figure 15.
Refer to EM TASK 72-32-30-440-801.
Install the RRT119749 lifter or the
RRT119750 lifter (with the RRT119754
lifting collar) to the stubshaft.
Engage the RRT086197 adapter to the
RRT119749 lifter or the RRT119750
lifter. Attach the RRT086197 adapter
to an applicable hoist.
Alternatively, equivalent locally
made tooling can be used with the
agreement of Rolls-Royce.
(5) Part 1 - Install the part on the
base plate.
CAUTION: IF THE RRT119747 SHAFT
CENTRALISER IS USED, MAKE
SURE THE DAMPENING RING PIN
IS REMOVED AND THE
DAMPENING RING IS NOT
POSITIONED HIGHER THAN THE
PIN HOLE. MAKE SURE THAT
THE COMPLETE PIN HOLE
REMAINS VISIBLE. THIS IS TO
MAKE SURE THAT THE
DAMPENING RING IS NOT
UNINSTALLED
UNINTENTIONALLY.
Refer to Figure 4, Figure 14, Figure
15 and Figure 16.
Lift the assembly and place it on the
RRT119745 base plate. Make sure that
the location surfaces are clean
before placing it on the base plate.
Install the part on the RRT119745
base plate using RRT119746 base plate
nylon ring and the RRT119747 shaft
centraliser or the RRT119748 shaft
centraliser. Alternatively,
equivalent locally made tooling can
be used with the agreement of
Rolls-Royce.
Remove the RRT086197 adapter and
either the RRT119749 lifter or the
RRT119750 lifter (with the RRT119754
lifting collar) from the stubshaft.
If an RRT119750 lifter (with the
RRT119754 lifting collar) and
RRT119748 shaft centraliser is used,
then install the RRT119756 dampening
ring assembly on the RRT119748 shaft
centraliser.
Printed in Great Britain
TRENT 1000 72−K571
Page 11
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### Page 15

(6) Part 1 - Install the seal fin
protectors.
Refer to Figure 1, Figure 2 and
Figure 12.
Install the seal fin protectors. Use
RRT119768 polymer stage 8 seal fins
protector to protect the Stage 8 seal
fins. If necessary, use RRT081238
polymer stage 2-3 seal fin protector
and RRT081239 polymer stage 1-2 seal
fin protector to protect the Stage
2-3 and Stage 1-2 seal fins
respectively.
Connect the ends of protector with
the Velcro strap. Alternatively,
equivalent locally made tooling can
be used with the agreement of
Rolls-Royce.
(7) Part 1 - Protect the Stages 3 to 8
blades.
Refer to Figure 1, Figure 2 and
Figure 12.
Use RRT119762 polymer stage 3 blade
protector, RRT119763 polymer stage 4
blade protector, RRT119764 polymer
stage 5 blade protector, RRT119765
polymer stage 6 blade protector,
RRT119766 polymer stage 7 blade
protector and RRT119767 polymer stage
8 blade protector to protect the
Stages 3 to 8 blades. Alternatively,
equivalent locally made tooling can
be used with the agreement of
Rolls-Royce.
(8) Part 1 - Protect the Stages 1 to 2
dovetails.
Refer to Figure 1, Figure 2 and
Figure 12.
Use RRT119758 polymer stage 1
dovetail protector and RRT119760
polymer stage 2 dovetail protector to
protect the Stages 1 to 2 dovetails.
Alternatively, equivalent locally
made tooling can be used with the
agreement of Rolls-Royce.
(9) Part 1 - Protect the front seal
arm.
Refer to Figure 1, Figure 2 and
Figure 12.
Use RRT119757 polymer front seal arm
seal fin protector to protect the
three seal fins on the front seal
arm. Alternatively, equivalent
locally made tooling can be used with
the agreement of Rolls-Royce.
Printed in Great Britain
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### Page 16

(10) Part 1 - Protect the Stubshaft. Refer to Figure 2 and Figure 3.
Install the RRT119755 polymer trough
adjacent to the Stage 1 disc and the
stubshaft. Alternatively, equivalent
locally made tooling can be used with
the agreement of Rolls-Royce.
Printed in Great Britain
TRENT 1000 72−K571
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### Page 17

(11) Part 1 - Shrink wrap to cover the
rotor shaft.
CAUTION: YOU MUST NOT APPLY TOO MUCH
HEAT OR LET THE HEAT SOURCE
TO STAY AT THE SAME
LOCATION FOR TOO LONG. TO
CONTROL THE HEAT, KEEP THE
HEAT SOURCE AT A CORRECT
DISTANCE FROM THE SHRINK
WRAP. IF YOU DO NOT OBEY
THIS INSTRUCTION, DAMAGE TO
THE PROTECTORS OR COMPONENT
CAN OCCUR.
Refer to Figure 3 and Figure 4.
Wind OMat 1284 polyethylene shrink
wrap to cover the part as below:
Shrink wrap from the Stage 3 blade to
Stage 8 seal fin protector 3 times.
Shrink wrap from the Stage 1 seal fin
protector to Stage 2 dovetail 3
times. Shrink wrap from the Stage 1
seal fin protector to Stage 8 seal
fin protector once.
Make sure to get a final wrap
thickness of 1,20 mm (0.047 in.)
minimum (before shrink). If not,
apply additional shrink wrap.
Ensure that shrink wrap is
sufficiently overlapped from Stages 1
to 8. Consider heat shrinkage of
shrink wrap during the overlap
process. Use OMat 2/247 polyethylene
tape to hold the OMat 1284
polyethylene shrink wrap in position.
Use a heat gun to heat and shrink
OMat 1284 polyethylene shrink wrap.
Set the heat gun to the minimum
temperature necessary to shrink the
polyethylene shrink wrap. Refer to
manufacturer's instructions for the
maximum temperature.
Equivalent consumables to OMat 2/247
and OMat 1284 can be used with the
agreement of Rolls-Royce.
Visually inspect the polyethylene
shrink wrap for the signs of
overheating, heat damage and holes.
If overheated, damage or holes are
evident, then remove and replace the
shrink wrap. Alternatively,
equivalent locally made tooling and
masking methods can be used with the
agreement of Rolls-Royce.
Printed in Great Britain
TRENT 1000 72−K571
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### Page 18

(12) Part 1 - Install the part on the
machining equipment.
Refer to Figure 4 and Figure 16.
Install the RRT119751 lifting eye
tool on the RRT119747 shaft
centraliser or the RRT119748 shaft
centraliser of the base plate. Attach
an applicable hoist to the RRT119751
lifting eye tool and place it on the
machining equipment. Use the clocking
ring on the tooling base plate to set
the tooling and component assembly to
run true.
Remove the RRT119751 lifting eye tool
from the RRT119747 shaft centraliser
or the RRT119748 shaft centraliser.
(13) Part 1 - Install the top hat clamp
and polymer top hat cover.
Refer to Figure 4 and Figure 16.
Install the RRT119752 top hat clamp
on the RRT119747 shaft centraliser or
the RRT119748 shaft centraliser.
Install the RRT119753 polymer top hat
cover onto the RRT119752 top hat
clamp using washer and nut.
Alternatively, equivalent locally
made tooling can be used with the
agreement of Rolls-Royce. Make sure
the clamping force does not distort
the top hat cover.
Printed in Great Britain
TRENT 1000 72−K571
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### Page 19

(14) Part 1 - Machine the part. CAUTION: TITANIUM COMPONENTS:
WHEELS, STONES, ABRASIVE
PAPERS USED FOR DRESSING,
BLENDING OR POLISHING MUST
BE OF THE SILICON CARBIDE
TYPE. ALUMINIUM OXIDE TYPES
MUST NOT BE USED. IF
MECHANICAL CUTTERS ARE
USED, ONLY LIGHT CUTS MUST
BE MADE TO AVOID
OVERHEATING THE MATERIAL.
IF, DURING DRESSING,
BLENDING OR POLISHING, THE
MATERIAL IS DISCOLOURED DUE
TO HEATING, DARKER THAN A
LIGHT STRAW COLOUR, THE
COMPONENT MUST BE REJECTED.
CAUTION: DO NOT USE THE ROUGH
MACHINING PARAMETERS FOR
MATERIAL REMOVAL AT A
DIMENSION OF NOT LESS THAN
1,00 MM (0.039 IN.) FROM
THE FINAL FINISHED SURFACE
AS IT WILL MAKE THIS PART
UNSERVICEABLE.
Refer to Figure 1 and Figure 13.
Machine the front seal arm from the
front edge of the seal arm. Burrs and
sharp edges can be removed by
machining, if necessary.
Refer to approved vendor techniques.
The machining parameters used must
not be changed without revalidation
and agreement of Rolls Royce Plc.
MACHINING DATA
NOTE: New insert must be used for roughing, semi-finishing and
finishing operations each time the rework is done.
A. Roughing
Surface speed 31,50 to 38,50 m/min (1240 to 1515
in./min)
Feed Rate 0,09 to 0,11 mm/rev (0.003 to
0.004 in./rev)
Depth of Cut 0,25 to 1,00 mm (0.010 to 0.039
in.)
Tool Grade H13A Insert, tip radius 0,80
mm (0.032 in.)
Printed in Great Britain
TRENT 1000 72−K571
Page 16
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Jun.15/21
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SERVICE BULLETIN

### Page 20

Coolant OMat 1099 coolant, heavy duty
concentrate
B. Semi-finishing
Surface speed 31,50 to 38,50 m/min (1240 to 1515
in./min)
Feed Rate 0,09 to 0,11 mm/rev (0.003 to
0.004 in./rev)
Depth of Cut 0,225 to 0,275 mm (0.0089 to
0.0108 in.)
Tool Grade H13A Insert, tip radius 0,80
mm (0.032 in.)
Coolant OMat 1099 coolant, heavy duty
concentrate
C. Finishing
Surface speed 18,90 to 23,10 m/min (744 to 909
in./min)
Feed Rate 0,09 to 0,11 mm/rev (0.003 to
0.004 in./rev)
Depth of Cut 0,225 to 0,275 mm (0.0089 to
0.0108 in.)
Tool Grade H13A Insert, tip radius 0,80
mm (0.032 in.)
Coolant OMat 1099 coolant, heavy duty
concentrate
(15) Part 1 - Remove all coolant from
the part.
Dry the rework area. Use OMat 2/101
lint free cloth. Use suction
equipment.
Printed in Great Britain
TRENT 1000 72−K571
Page 17
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 21

(16) Part 1 - Dress the part. CAUTION: TITANIUM COMPONENTS:
WHEELS, STONES, ABRASIVE
PAPERS USED FOR DRESSING,
BLENDING OR POLISHING MUST
BE OF THE SILICON CARBIDE
TYPE. ALUMINIUM OXIDE TYPES
MUST NOT BE USED. IF
MECHANICAL CUTTERS ARE
USED, ONLY LIGHT CUTS MUST
BE MADE TO AVOID
OVERHEATING THE MATERIAL.
IF, DURING DRESSING,
BLENDING OR POLISHING, THE
MATERIAL IS DISCOLOURED DUE
TO HEATING, DARKER THAN A
LIGHT STRAW COLOUR, THE
COMPONENT MUST BE REJECTED.
Dress the part to remove burrs and
sharp edges.
Use OMat 5/28 waterproof silicon
carbide or equivalent.
(17) Part 1 - Remove the part. Remove the RRT119753 polymer top hat
cover and RRT119752 top hat clamp.
Attach the RRT119751 lifting eye tool
to the RRT119747 shaft centraliser or
the RRT119748 shaft centraliser. Use
an applicable hoist to lift the part.
Lift the part from the machining
equipment with the base plate.
Alternatively, equivalent locally
made tooling can be used with the
agreement of Rolls-Royce.
Remove the RRT119751 lifting eye tool
from the RRT119747 shaft centraliser
or the RRT119748 shaft centraliser.
(18) Part 1 - Clean the rework area. Refer to OP TASK 70-00-00-100-101 or
OP TASK 70-00-00-100-102. Swab
degrease the rework area.
Use degreasing equipment.
Printed in Great Britain
TRENT 1000 72−K571
Page 18
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Jun.15/21
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SERVICE BULLETIN

### Page 22

(19) Part 1 - Examine the part. Refer to Figure 1 and Figure 13.
Do a visual and dimensional
inspection of the reworked area.
Make sure that all the burrs and
sharp edges have been removed. Reject
if not satisfactory.
Do a visual inspection for damage
like scratches, scores and nicks:
Accept damage if up to 0,013 mm
(0.0005 in.) in depth and not more
than 25,40 mm (1.000 in.) in length.
Reject damage if more than 0,013 mm
(0.0005 in.) in depth or more than
25,40 mm (1.000 in.) in length.
(20) Part 1 - Etch the part. Do a swab etch on the rework area.
Refer to OP TASK 70-00-00-100-148,
SUBTASK 70-00-00-110-148-001.
Use swab etch equipment.
(21) DELETED.
(22) Part 1 - Crack test the part. Do a fluorescent penetrant inspection
of the rework area.
Refer to OP TASK 70-00-00-200-210.
Use OMat 652 fluorescent penetrant
ultra-high sensitivity,
post-emulsified and penetrant crack
test equipment.
Reject if cracked.
(23) Part 1 - Clean the part. Refer to OP TASK 70-00-00-100-101 or
OP TASK 70-00-00-100-102. Swab
degrease the rework area.
Use degreasing equipment.
(24) Part 1 - Remove the masking. CAUTION: MAKE SURE THAT THE ROTOR
ASSEMBLY, SEAL FINS AND
DOVETAILS ARE NOT DAMAGED
DURING REMOVAL OF THE
MASKING AND PROTECTORS.
Remove all the shrink wrap, covers
and protectors from the IP Compressor
Rotor Shaft Assembly installed from
Step 6 to Step 11.
Use hand tools.
Printed in Great Britain
TRENT 1000 72−K571
Page 19
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Jun.15/21
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SERVICE BULLETIN

### Page 23

(25) Part 1 - Install the lifter to the
stubshaft.
Refer to Figure 14 and Figure 15.
Refer to EM TASK 72-32-30-440-801.
If an RRT119748 shaft centraliser and
RRT119750 lifter (with the RRT119754
lifting collar) is used, then remove
the RRT119756 dampening ring assembly
on the RRT119748 shaft centraliser.
Install the RRT119749 lifter or the
RRT119750 lifter (with the RRT119754
lifting collar) to the stubshaft.
Engage the RRT086197 adapter to the
RRT119749 lifter or the RRT119750
lifter. Attach the RRT086197 adapter
to an applicable hoist.
Alternatively, equivalent locally
made tooling can be used with the
agreement of Rolls-Royce.
(26) Part 1 - Remove the Rotor Assembly
from the base plate.
Lift the Rotor Assembly from the
RRT119745 base plate using the
RRT119749 lifter or the RRT119750
lifter and an applicable hoist. Place
the Rotor Assembly on a pallet.
Remove the RRT086197 adapter and the
RRT119749 lifter or the RRT119750
lifter (with the RRT119754 lifting
collar) from the stubshaft.
(27) Part 1 - Examine the part. Refer to Figure 1 and Figure 13.
Do a visual inspection of the part.
Make sure there is no handling
damage. Reject if damaged.
Use an applicable inspection method
to make sure there is no coolant
ingress. Reject if any evidence of
coolant ingress is found.
Do a dimensional inspection of the
part. Make sure the maximum machining
length is not more than the rework
limit.
Do a dimensional inspection of the
Dimension Y. Record the dimension in
the Engine log book against the
serial number of the part. Record the
measurement to 2 decimal places in
metric and 3 decimal places in
imperial.
Reject, if not in the limits.
Printed in Great Britain
TRENT 1000 72−K571
Page 20
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 24

(28) Part 1 - Identify the part. Refer to Figure 17.
Refer to OP TASK 70-00-00-300-363.
Strike through the existing part
number KH18436. Vibration peen
LV18447 in the area identified.
Use vibration peen equipment.
Remove burrs and raised material
produced by vibration peening. Use
OMat 5/28 waterproof silicon carbide
or equivalent.
(29) Part 1 - Assemble the parts. Re-assemble the parts as per EM TASK
72-32-30-440-801.
Make sure that part is balanced as
per EM TASK 72-32-30-440-801.
(1) Part 2 - Disassemble the IP
Compressor Rotor Assembly (if
necessary).
Refer to Figure 5.
Refer to EM TASK 72-32-30-040-801.
Disassemble the IP Compressor Rotor
Assembly. Remove the IP Compressor
Stages 1 to 8 blades, Curvic Ring and
the Front Stubshaft.
(2) Part 2 - Crack test the part. Do a fluorescent penetrant inspection
of the front seal arm.
Refer to OP TASK 70-00-00-200-210.
Use OMat 652 fluorescent penetrant
ultra-high sensitivity,
post-emulsified and penetrant crack
test equipment.
If a crack is found in the IP
Compressor Rotor Shaft then
quarantine the part and refer to
Rolls-Royce plc.
(3) Part 2 - Examine the part. Refer to Figure 5 and Figure 13.
Do a dimensional inspection of the
Dimension X. Record the dimension in
the Engine log book against the
serial number of the part. Record the
measurement to 2 decimal places in
metric and 3 decimal places in
imperial.
(4) Part 2 - Install the dummy
stubshaft.
Refer to Figure 7.
Install RRT026842 dummy shaft to the
IP Compressor Rotor Shaft.
Refer to EM TASK 72-32-30-440-801.
Alternatively, equivalent locally
made tooling can be used with the
agreement of Rolls-Royce.
Printed in Great Britain
TRENT 1000 72−K571
Page 21
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Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 25

(5) Part 2 - Install the lifter to the
dummy stubshaft.
Refer to Figure 14 and Figure 15.
Refer to EM TASK 72-32-30-440-801.
Install the RRT119749 lifter or the
RRT119750 lifter (with the RRT119754
lifting collar) to the dummy
stubshaft. Engage the RRT086197
adapter to the RRT119749 lifter or
the RRT119750 lifter. Attach the
RRT086197 adapter to an applicable
hoist. Alternatively, equivalent
locally made tooling can be used with
the agreement of Rolls-Royce.
(6) Part 2 - Install the part on the
base plate.
CAUTION: IF THE RRT119747 SHAFT
CENTRALISER IS USED, MAKE
SURE THE DAMPENING RING PIN
IS REMOVED AND THE
DAMPENING RING IS NOT
POSITIONED HIGHER THAN THE
PIN HOLE. MAKE SURE THAT
THE COMPLETE PIN HOLE
REMAINS VISIBLE. THIS IS TO
MAKE SURE THAT THE
DAMPENING RING IS NOT
UNINSTALLED
UNINTENTIONALLY.
Refer to Figure 7, Figure 14, Figure
15 and Figure 16.
Lift the assembly and place it on the
RRT119745 base plate. Make sure that
the location surfaces are clean
before placing it on the base plate.
Install the part on the RRT119745
base plate using RRT119746 base plate
nylon ring and the RRT119747 shaft
centraliser or the RRT119748 shaft
centraliser. Alternatively,
equivalent locally made tooling can
be used with the agreement of
Rolls-Royce.
Remove the RRT086197 adapter and
RRT119749 lifter or the RRT119750
lifter (with the RRT119754 lifting
collar) from the stubshaft.
If an RRT119750 lifter (with the
RRT119754 lifting collar) and
RRT119748 shaft centraliser is used,
then install the RRT119756 dampening
ring assembly on the RRT119748 shaft
centraliser.
Printed in Great Britain
TRENT 1000 72−K571
Page 22
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Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 26

(7) Part 2 - Install the seal fin
protectors.
Refer to Figure 5, Figure 6 and
Figure 12.
Install the seal fin protectors. Use
RRT119768 polymer stage 8 seal fins
protector to protect the Stage 8 seal
fins. Use RRT091633 polymer stage 7-8
seal fin protector, RRT081243 polymer
stage 6-7 seal fin protector,
RRT091632 polymer stage 5-6 seal fin
protector, RRT081241 polymer stage
4-5 seal fin protector, RRT081240
polymer stage 3-4 seal fin protector,
RRT081238 polymer stage 2-3 seal fin
protector and RRT081239 polymer stage
1-2 seal fin protector to protect the
Stage 7-8, Stage 6-7, Stage 5-6,
Stage 4-5, Stage 3-4, Stage 2-3 and
Stage 1-2 seal fins respectively.
Connect the ends of protector with
the Velcro strap. Alternatively,
equivalent locally made tooling can
be used with the agreement of
Rolls-Royce.
(8) Part 2 - Protect the Stages 1 to 2
dovetails.
Refer to Figure 5, Figure 6 and
Figure 12.
Use RRT119758 polymer stage 1
dovetail protector and RRT119760
polymer stage 2 dovetail protector to
protect the Stages 1 to 2 dovetails.
Alternatively, equivalent locally
made tooling can be used with the
agreement of Rolls-Royce.
(9) Part 2 - Protect the front seal
arm.
Refer to Figure 5, Figure 6 and
Figure 12.
Use RRT119757 polymer front seal arm
seal fin protector to protect the
three seal fins on the front seal
arm. Alternatively, equivalent
locally made tooling can be used with
the agreement of Rolls-Royce.
Printed in Great Britain
TRENT 1000 72−K571
Page 23
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Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 27

(10) Part 2 - Install the part on the
machining equipment.
Refer to Figure 7 and Figure 16.
Install the RRT119751 lifting eye
tool on the RRT119747 shaft
centraliser or the RRT119748 shaft
centraliser of the base plate. Attach
an applicable hoist to the RRT119751
lifting eye tool and place it on the
machining equipment. Use the clocking
ring on the tooling base plate to set
the tooling and component assembly to
run true.
Remove the RRT119751 lifting eye tool
from the RRT119747 shaft centraliser
or the RRT119748 shaft centraliser.
Printed in Great Britain
TRENT 1000 72−K571
Page 24
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 28

(11) Part 2 - Machine the part. CAUTION: TITANIUM COMPONENTS:
WHEELS, STONES, ABRASIVE
PAPERS USED FOR DRESSING,
BLENDING OR POLISHING MUST
BE OF THE SILICON CARBIDE
TYPE. ALUMINIUM OXIDE TYPES
MUST NOT BE USED. IF
MECHANICAL CUTTERS ARE
USED, ONLY LIGHT CUTS MUST
BE MADE TO AVOID
OVERHEATING THE MATERIAL.
IF, DURING DRESSING,
BLENDING OR POLISHING, THE
MATERIAL IS DISCOLOURED DUE
TO HEATING, DARKER THAN A
LIGHT STRAW COLOUR, THE
COMPONENT MUST BE REJECTED.
CAUTION: DO NOT USE THE ROUGH
MACHINING PARAMETERS FOR
MATERIAL REMOVAL AT A
DIMENSION OF NOT LESS THAN
1,00 MM (0.039 IN.) FROM
THE FINAL FINISHED SURFACE
AS IT WILL MAKE THIS PART
UNSERVICEABLE.
Refer to Figure 5 and Figure 13.
Machine the front seal arm from the
front edge of the seal arm. Burrs and
sharp edges can be removed by
machining, if necessary.
Refer to approved vendor techniques.
The machining parameters used must
not be changed without revalidation
and agreement of Rolls Royce Plc.
MACHINING DATA
NOTE: New insert must be used for roughing, semi-finishing and
finishing operations each time the rework is done.
A. Roughing
Surface speed 31,50 to 38,50 m/min (1240 to 1515
in./min)
Feed Rate 0,09 to 0,11 mm/rev (0.003 to
0.004 in./rev)
Depth of Cut 0,25 to 1,00 mm (0.010 to 0.039
in.)
Tool Grade H13A Insert, tip radius 0,80
mm (0.032 in.)
Printed in Great Britain
TRENT 1000 72−K571
Page 25
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Jun.15/21
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SERVICE BULLETIN

### Page 29

Coolant OMat 1099 coolant, heavy duty
concentrate
B. Semi-finishing
Surface speed 31,50 to 38,50 m/min (1240 to 1515
in./min)
Feed Rate 0,09 to 0,11 mm/rev (0.003 to
0.004 in./rev)
Depth of Cut 0,225 to 0,275 mm (0.0089 to
0.0108 in.)
Tool Grade H13A Insert, tip radius 0,80
mm (0.032 in.)
Coolant OMat 1099 coolant, heavy duty
concentrate
C. Finishing
Surface speed 18,90 to 23,10 m/min (744 to 909
in./min)
Feed Rate 0,09 to 0,11 mm/rev (0.003 to
0.004 in./rev)
Depth of Cut 0,225 to 0,275 mm (0.0089 to
0.0108 in.)
Tool Grade H13A Insert, tip radius 0,80
mm (0.032 in.)
Coolant OMat 1099 coolant, heavy duty
concentrate
(12) Part 2 - Remove all coolant from
the part.
Dry the rework area. Use OMat 2/101
lint free cloth. Use suction
equipment.
Printed in Great Britain
TRENT 1000 72−K571
Page 26
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Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 30

(13) Part 2 - Dress the part. CAUTION: TITANIUM COMPONENTS:
WHEELS, STONES, ABRASIVE
PAPERS USED FOR DRESSING,
BLENDING OR POLISHING MUST
BE OF THE SILICON CARBIDE
TYPE. ALUMINIUM OXIDE TYPES
MUST NOT BE USED. IF
MECHANICAL CUTTERS ARE
USED, ONLY LIGHT CUTS MUST
BE MADE TO AVOID
OVERHEATING THE MATERIAL.
IF, DURING DRESSING,
BLENDING OR POLISHING, THE
MATERIAL IS DISCOLOURED DUE
TO HEATING, DARKER THAN A
LIGHT STRAW COLOUR, THE
COMPONENT MUST BE REJECTED.
Dress the part to remove burrs and
sharp edges.
Use OMat 5/28 waterproof silicon
carbide or equivalent.
(14) Part 2 - Remove the part. Attach the RRT119751 lifting eye tool
to the RRT119747 shaft centraliser or
the RRT119748 shaft centraliser. Use
an applicable hoist to lift the part.
Lift the part from the machining
equipment with the base plate.
Alternatively, equivalent locally
made tooling can be used with the
agreement of Rolls-Royce.
Remove the RRT119751 lifting eye tool
from the RRT119747 shaft centraliser
or the RRT119748 shaft centraliser.
Printed in Great Britain
TRENT 1000 72−K571
Page 27
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Jun.15/21
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SERVICE BULLETIN

### Page 31

(15) Part 2 - Remove the part from the
base plate.
Refer to Figure 7.
Refer to EM TASK 72-32-30-440-801.
If an RRT119748 shaft centraliser and
RRT119750 lifter is used, then remove
the RRT119756 dampening ring assembly
on the RRT119748 shaft centraliser.
Install the RRT119749 lifter or the
RRT119750 lifter to dummy
stubshaft. Engage the RRT086197
adapter to the RRT119749 lifter or
the RRT119750 lifter (with the
RRT119754 lifting collar) and attach
RRT086197 adapter to an applicable
hoist. Alternatively, equivalent
locally made tooling can be used with
the agreement of Rolls-Royce.
Use an applicable hoist to lift the
part from the base plate.
(16) Part 2 - Remove the dummy
stubshaft.
Remove the dummy stubshaft RRT026842
installed in the Step 3. Refer to EM
TASK 72-32-30-040-801.
Alternatively, equivalent locally
made tooling can be used with the
agreement of Rolls-Royce.
(17) Part 2 - Remove the masking. CAUTION: MAKE SURE THAT THE ROTOR
ASSEMBLY, SEAL FINS AND
DOVETAILS ARE NOT DAMAGED
DURING REMOVAL OF THE
MASKING AND PROTECTORS.
Remove all the seal fin protectors
and dovetail protectors from the IP
Compressor Rotor Shaft Assembly
installed from Step 7 to Step 9.
Use hand tools.
(18) Part 2 - Clean the part. Refer to OP TASK 70-00-00-100-101 or
OP TASK 70-00-00-100-102.
Refer to the approved vendor method.
Use degreasing equipment.
Printed in Great Britain
TRENT 1000 72−K571
Page 28
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Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 32

(19) Part 2 - Examine the part. Refer to Figure 5 and Figure 13.
Do a visual and dimensional
inspection of the reworked area.
Make sure that all the burrs and
sharp edges have been removed. Reject
if not satisfactory.
Do a visual inspection for damage
like scratches, scores and nicks:
Accept damage if up to 0,013 mm
(0.0005 in.) in depth and not more
than 25,40 mm (1.000 in.) in length.
Reject damage if more than 0,013 mm
(0.0005 in.) in depth or more than
25,40 mm (1.000 in.) in length.
(20) Part 2 - Etch the part. Do a swab etch on the rework area.
Refer to OP TASK 70-00-00-100-148,
SUBTASK 70-00-00-110-148-001.
Use swab etch equipment.
(21) DELETED.
(22) Part 2 - Crack test the part. Do a fluorescent penetrant inspection
of the rework area.
Refer to OP TASK 70-00-00-200-210.
Use OMat 652 fluorescent penetrant
ultra-high sensitivity,
post-emulsified and penetrant crack
test equipment.
Reject if cracked.
(23) Part 2 - Clean the rework area. Refer to OP TASK 70-00-00-100-101 or
OP TASK 70-00-00-100-102. Swab
degrease the rework area.
Use degreasing equipment.
Printed in Great Britain
TRENT 1000 72−K571
Page 29
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 33

(24) Part 2 - Examine the part. Refer to Figure 5 and Figure 13.
Do a visual inspection of the part.
Make sure there is no handling
damage. Reject if damaged.
Do a dimensional inspection of the
part. Make sure the maximum machining
length is not more than the rework
limit.
Do a dimensional inspection of the
Dimension Y. Record the dimension in
the Engine log book against the
serial number of the part. Record the
measurement to 2 decimal places in
metric and 3 decimal places in
imperial.
Reject, if not in the limits.
(25) Part 2 - Identify the part. Refer to Figure 17.
Refer to OP TASK 70-00-00-300-363.
Strike through the existing part
number KH18436. Vibration peen
LV18447 in the area identified.
Use vibration peen equipment.
Remove burrs and raised material
produced by vibration peening. Use
OMat 5/28 waterproof silicon carbide
or equivalent.
(26) Part 2 - Assemble the parts (if
necessary).
Re-install the Stages 1 to 8 Blades,
Curvic Ring and the Front Stubshaft
on the IPC Rotor as per EM TASK
72-32-30-440-801.
Make sure that part is balanced as
per EM TASK 72-32-30-440-801.
(1) Part 3 - Disassemble the IP
Compressor Rotor Assembly.
Refer to Figure 8.
Refer to EM TASK 72-32-30-040-801.
Disassemble the IP Compressor Rotor
Assembly.
Do not remove the IP Compressor Front
Stubshaft and Curvic Ring. Do not
remove the Stages 1 through 8
Compressor Blades.
Printed in Great Britain
TRENT 1000 72−K571
Page 30
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### Page 34

(2) Part 3 - Crack test the part. Do a fluorescent penetrant inspection
of the front seal arm.
Refer to OP TASK 70-00-00-200-210.
Use OMat 652 fluorescent penetrant
ultra-high sensitivity,
post-emulsified and penetrant crack
test equipment.
If a crack is found in the IP
Compressor Rotor Shaft then
quarantine the part and refer to
Rolls-Royce plc.
(3) Part 3 - Examine the part. Refer to Figure 8 and Figure 13.
Do a dimensional inspection of the
Dimension X. Record the dimension in
the Engine log book against the
serial number of the part. Record the
measurement to 2 decimal places in
metric and 3 decimal places in
imperial.
(4) Part 3 - Install the lifter to the
stubshaft.
Refer to Figure 14 and Figure 15.
Refer to EM TASK 72-32-30-440-801.
Install the RRT119749 lifter or the
RRT119750 lifter (with the RRT119754
lifting collar) to the stubshaft.
Engage the RRT086197 adapter to the
RRT119749 lifter or the RRT119750
lifter. Attach the RRT086197 adapter
to an applicable hoist.
Alternatively, equivalent locally
made tooling can be used with the
agreement of Rolls-Royce.
Printed in Great Britain
TRENT 1000 72−K571
Page 31
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### Page 35

(5) Part 3 - Install the part on the
base plate.
CAUTION: IF THE RRT119747 SHAFT
CENTRALISER IS USED, MAKE
SURE THE DAMPENING RING PIN
IS REMOVED AND THE
DAMPENING RING IS NOT
POSITIONED HIGHER THAN THE
PIN HOLE. MAKE SURE THAT
THE COMPLETE PIN HOLE
REMAINS VISIBLE. THIS IS TO
MAKE SURE THAT THE
DAMPENING RING IS NOT
UNINSTALLED
UNINTENTIONALLY.
Refer to Figure 11, Figure 14, Figure
15 and Figure 16.
Lift the assembly and place it on the
RRT119745 base plate. Make sure that
the location surfaces are clean
before placing it on the base plate.
Install the part on the RRT119745
base plate using RRT119746 base plate
nylon ring and the RRT119747 shaft
centraliser or the RRT119748 shaft
centraliser. Alternatively,
equivalent locally made tooling can
be used with the agreement of
Rolls-Royce.
Remove the RRT086197 adapter and
either the RRT119749 lifter or the
RRT119750 lifter (with the RRT119754
lifting collar) from the stubshaft.
If an RRT119750 lifter (with the
RRT119754 lifting collar) and
RRT119748 shaft centraliser is used,
then install the RRT119756 dampening
ring assembly on the RRT119748 shaft
centraliser.
(6) Part 3 - Install the seal fin
protectors.
Refer to Figure 8, Figure 9 and
Figure 12.
Install the seal fin protectors. Use
RRT119768 polymer stage 8 seal fins
protector to protect the Stage 8 seal
fins.
Connect the ends of protector with
the Velcro strap. Alternatively,
equivalent locally made tooling can
be used with the agreement of
Rolls-Royce.
Printed in Great Britain
TRENT 1000 72−K571
Page 32
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### Page 36

(7) Part 3 - Protect the Stages 1 to 8
blades.
Refer to Figure 8, Figure 9 and
Figure 12.
Use RRT119759 polymer stage 1 blade
protector, RRT119761 polymer stage 2
blade protector, RRT119762 polymer
stage 3 blade protector, RRT119763
polymer stage 4 blade protector,
RRT119764 polymer stage 5 blade
protector, RRT119765 polymer stage 6
blade protector, RRT119766 polymer
stage 7 blade protector and RRT119767
polymer stage 8 blade protector to
protect the Stages 1 to 8 blades.
Alternatively, equivalent locally
made tooling can be used with the
agreement of Rolls-Royce.
(8) Part 3 - Protect the front seal
arm.
Refer to Figure 8, Figure 9 and
Figure 12.
Use RRT119757 polymer front seal arm
seal fin protector to protect the
three seal fins on the front seal
arm. Alternatively, equivalent
locally made tooling can be used with
the agreement of Rolls-Royce.
(9) Part 3 - Protect the Stubshaft. Refer to Figure 9 and Figure 10.
Install the RRT119755 polymer trough
adjacent to the Stage 1 disc and the
stubshaft. Alternatively, equivalent
locally made tooling can be used with
the agreement of Rolls-Royce.
Printed in Great Britain
TRENT 1000 72−K571
Page 33
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 37

(10) Part 3 - Shrink wrap to cover the
rotor shaft.
CAUTION: YOU MUST NOT APPLY TOO MUCH
HEAT OR LET THE HEAT SOURCE
TO STAY AT THE SAME
LOCATION FOR TOO LONG. TO
CONTROL THE HEAT, KEEP THE
HEAT SOURCE AT A CORRECT
DISTANCE FROM THE SHRINK
WRAP. IF YOU DO NOT OBEY
THIS INSTRUCTION, DAMAGE TO
THE PROTECTORS OR COMPONENT
CAN OCCUR.
Refer to Figure 10 and Figure 11.
Wind OMat 1284 polyethylene shrink
wrap to cover from the Stage 1 seal
fin protector to Stage 8 seal fin
protector 4 times. Make sure to get a
final thickness of 1,20 mm (0.047
in.) minimum (before shrink) is
achieved. If not, apply additional
shrink wrap. Consider heat shrinkage
of shrink wrap during the overlap
process. Use OMat 2/247 polyethylene
tape to hold the OMat 1284
polyethylene shrink wrap in position.
Use a heat gun to heat and shrink
OMat 1284 polyethylene shrink wrap.
Set the heat gun to the minimum
temperature necessary to shrink the
polyethylene shrink wrap. Refer to
manufacturer's instructions for the
maximum temperature.
Equivalent consumables to OMat 2/247
and OMat 1284 can be used with the
agreement of Rolls-Royce.
Visually inspect the polyethylene
shrink wrap for the signs of
overheating, heat damage and holes.
If overheated, damage or holes are
evident, then remove and replace the
shrink wrap. Alternatively,
equivalent locally made tooling and
masking methods can be used with the
agreement of Rolls-Royce.
Printed in Great Britain
TRENT 1000 72−K571
Page 34
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 38

(11) Part 3 - Install the part on the
machining equipment.
Figure 11 and Figure 15.
Install the RRT119751 lifting eye
tool on the RRT119747 shaft
centraliser or the RRT119748 shaft
centraliser of the base plate. Attach
an applicable hoist to the RRT119751
lifting eye tool and place it on the
machining equipment. Use the clocking
ring on the tooling base plate to set
the tooling and component assembly to
run true.
Remove the RRT119751 lifting eye tool
from the RRT119747 shaft centraliser
or the RRT119748 shaft centraliser.
(12) Part 3 - Install the top hat clamp
and top hat cover.
Figure 11 and Figure 15.
Install the RRT119752 top hat clamp
on the RRT119747 shaft centraliser or
the RRT119748 shaft centraliser.
Install the RRT119753 polymer top hat
cover onto the RRT119752 top hat
clamp using washer and nut.
Alternatively, equivalent locally
made tooling can be used with the
agreement of Rolls-Royce. Make sure
the clamping force does not distort
the top hat cover.
Printed in Great Britain
TRENT 1000 72−K571
Page 35
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 39

(13) Part 3 - Machine the part. CAUTION: TITANIUM COMPONENTS:
WHEELS, STONES, ABRASIVE
PAPERS USED FOR DRESSING,
BLENDING OR POLISHING MUST
BE OF THE SILICON CARBIDE
TYPE. ALUMINIUM OXIDE TYPES
MUST NOT BE USED. IF
MECHANICAL CUTTERS ARE
USED, ONLY LIGHT CUTS MUST
BE MADE TO AVOID
OVERHEATING THE MATERIAL.
IF, DURING DRESSING,
BLENDING OR POLISHING, THE
MATERIAL IS DISCOLOURED DUE
TO HEATING, DARKER THAN A
LIGHT STRAW COLOUR, THE
COMPONENT MUST BE REJECTED.
CAUTION: DO NOT USE THE ROUGH
MACHINING PARAMETERS FOR
MATERIAL REMOVAL AT A
DIMENSION OF NOT LESS THAN
1,00 MM (0.039 IN.) FROM
THE FINAL FINISHED SURFACE
AS IT WILL MAKE THIS PART
UNSERVICEABLE.
Refer to Figure 8 and Figure 13.
Machine the front seal arm from the
front edge of the seal arm. Burrs and
sharp edges can be removed by
machining, if necessary.
Refer to approved vendor techniques.
The machining parameters used must
not be changed without revalidation
and agreement of Rolls Royce Plc.
MACHINING DATA
NOTE: New insert must be used for roughing, semi-finishing and
finishing operations each time the rework is done.
A. Roughing
Surface speed 31,50 to 38,50 m/min (1240 to 1515
in./min)
Feed Rate 0,09 to 0,11 mm/rev (0.003 to
0.004 in./rev)
Depth of Cut 0,25 to 1,00 mm (0.010 to 0.039
in.)
Tool Grade H13A Insert, tip radius 0,80
mm (0.032 in.)
Printed in Great Britain
TRENT 1000 72−K571
Page 36
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 40

Coolant OMat 1099 coolant, heavy duty
concentrate
B. Semi-finishing
Surface speed 31,50 to 38,50 m/min (1240 to 1515
in./min)
Feed Rate 0,09 to 0,11 mm/rev (0.003 to
0.004 in./rev)
Depth of Cut 0,225 to 0,275 mm (0.0089 to
0.0108 in.)
Tool Grade H13A Insert, tip radius 0,80
mm (0.032 in.)
Coolant OMat 1099 coolant, heavy duty
concentrate
C. Finishing
Surface speed 18,90 to 23,10 m/min (744 to 909
in./min)
Feed Rate 0,09 to 0,11 mm/rev (0.003 to
0.004 in./rev)
Depth of Cut 0,225 to 0,275 mm (0.0089 to
0.0108 in.)
Tool Grade H13A Insert, tip radius 0,80
mm (0.032 in.)
Coolant OMat 1099 coolant, heavy duty
concentrate
(14) Part 3 - Remove all coolant from
the part.
Dry the rework area. Use OMat 2/101
lint free cloth. Use suction
equipment.
Printed in Great Britain
TRENT 1000 72−K571
Page 37
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 41

(15) Part 3 - Dress the part. CAUTION: TITANIUM COMPONENTS:
WHEELS, STONES, ABRASIVE
PAPERS USED FOR DRESSING,
BLENDING OR POLISHING MUST
BE OF THE SILICON CARBIDE
TYPE. ALUMINIUM OXIDE TYPES
MUST NOT BE USED. IF
MECHANICAL CUTTERS ARE
USED, ONLY LIGHT CUTS MUST
BE MADE TO AVOID
OVERHEATING THE MATERIAL.
IF, DURING DRESSING,
BLENDING OR POLISHING, THE
MATERIAL IS DISCOLOURED DUE
TO HEATING, DARKER THAN A
LIGHT STRAW COLOUR, THE
COMPONENT MUST BE REJECTED.
Dress the part to remove burrs and
sharp edges.
Use OMat 5/28 waterproof silicon
carbide or equivalent.
(16) Part 3 - Remove the part. Remove the RRT119753 polymer top hat
cover and RRT119752 top hat clamp.
Attach the RRT119751 lifting eye
tool to the RRT119747 shaft
centraliser or the RRT119748 shaft
centraliser. Use an applicable hoist
to lift the part.
Lift the part from the machining
equipment with the base plate.
Alternatively, equivalent locally
made tooling can be used with the
agreement of Rolls-Royce.
Remove the RRT119751 lifting eye
tool from the RRT119747 shaft
centraliser or the RRT119748 shaft
centraliser.
(17) Part 3 - Clean the rework area. Refer to OP TASK 70-00-00-100-101 or
OP TASK 70-00-00-100-102. Swab
degrease the rework area.
Use degreasing equipment.
Printed in Great Britain
TRENT 1000 72−K571
Page 38
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 42

(18) Part 3 - Examine the part. Refer to Figure 8 and Figure 13.
Do a visual and dimensional
inspection of the reworked area.
Make sure that all the burrs and
sharp edges have been removed. Reject
if not satisfactory.
Do a visual inspection for damage
like scratches, scores and nicks:
Accept damage if up to 0,013 mm
(0.0005 in.) in depth and not more
than 25,40 mm (1.000 in.) in length.
Reject damage if more than 0,013 mm
(0.0005 in.) in depth or more than
25,40 mm (1.000 in.) in length.
(19) Part 3 - Etch the part. Do a swab etch on the rework area.
Refer to OP TASK 70-00-00-100-148,
SUBTASK 70-00-00-110-148-001.
Use swab etch equipment.
(20) DELETED.
(21) Part 3 - Crack test the part. Do a fluorescent penetrant inspection
of the rework area.
Refer to OP TASK 70-00-00-200-210.
Use OMat 652 fluorescent penetrant
ultra-high sensitivity,
post-emulsified and penetrant crack
test equipment.
Reject if cracked.
(22) Part 3 - Clean the part. Refer to OP TASK 70-00-00-100-101 or
OP TASK 70-00-00-100-102. Swab
degrease the rework area.
Use degreasing equipment.
(23) Part 3 - Remove the masking. CAUTION: MAKE SURE THAT THE ROTOR
ASSEMBLY, SEAL FINS AND
DOVETAILS ARE NOT DAMAGED
DURING REMOVAL OF THE
MASKING AND PROTECTORS.
Remove all the shrink wrap, covers
and protectors from the IP Compressor
Rotor Shaft Assembly installed from
Step 6 to Step 10.
Use hand tools.
Printed in Great Britain
TRENT 1000 72−K571
Page 39
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 43

(24) Part 3 - Install the lifter to the
stubshaft.
Refer to Figure 14 and Figure 15.
Refer to EM TASK 72-32-30-440-801.
If an RRT119748 shaft centraliser and
RRT119750 lifter (with the RRT119754
lifting collar) is used, then remove
the RRT119756 dampening ring assembly
on the RRT119748 shaft centraliser.
Install the RRT119749 lifter or the
RRT119750 lifter (with the RRT119754
lifting collar) to the stubshaft.
Engage the RRT086197 adapter to the
RRT119749 lifter or the RRT119750
lifter. Attach the RRT086197 adapter
to an applicable hoist.
Alternatively, equivalent locally
made tooling can be used with the
agreement of Rolls-Royce.
(25) Part 3 - Remove the Rotor Assembly
from the base plate.
Lift the Rotor Assembly from the
RRT119745 base plate using the
RRT119749 lifter or the RRT119750
lifter and an applicable hoist. Place
the Rotor Assembly on a pallet.
Remove the RRT086197 adapter and the
RRT119749 lifter or the RRT119750
lifter (with the RRT119754 lifting
collar) from the stubshaft.
(26) Part 3 - Examine the part. Refer to Figure 8 and Figure 13.
Do a visual inspection of the part.
Make sure there is no handling
damage. Reject if damaged.
Use an applicable inspection method
to make sure there is no coolant
ingress. Reject if any evidence of
coolant ingress is found.
Do a dimensional inspection of the
part. Make sure the maximum machining
length is not more than the rework
limit.
Do a dimensional inspection of the
Dimension Y. Record the dimension in
the Engine log book against the
serial number of the part. Record the
measurement to 2 decimal places in
metric and 3 decimal places in
imperial.
Reject, if not in the limits.
Printed in Great Britain
TRENT 1000 72−K571
Page 40
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 44

(27) Part 3 - Identify the part. Refer to Figure 17.
Refer to OP TASK 70-00-00-300-363.
Strike through the existing part
number KH18436. Vibration peen
LV18447 in the area identified.
Use vibration peen equipment.
Remove burrs and raised material
produced by vibration peening. Use
OMat 5/28 waterproof silicon carbide
or equivalent.
If necessary, it is acceptable to
record the service bulletin
accomplishment and new LV18447 part
number in the engine log book. The
new LV18447 part number must be
permanently marked on the part and
the existing KH18436 part number
struck through at the next engine
overhaul of the IPC module.
(28) Part 3 - Assemble the parts. Re-assemble the parts as per EM TASK
72-32-30-440-801.
Make sure that part is balanced as
per EM TASK 72-32-30-440-801.
E. A record of accomplishment is required.
The Service Bulletin number and relevant Service Bulletin part(s) shall be
recorded in the relevant log book when the Service Bulletin part is fitted in its
entirety.
Printed in Great Britain
TRENT 1000 72−K571
Page 41
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 45

dem0002660
FRONT SEAL ARM
STAGE 8 BLADE
STAGE 7 BLADE
STAGE 6 BLADE
STAGE 5 BLADE
STAGE 4 BLADE
STAGE 3 BLADE
B
(ø480,46 (18,916))
IP COMPRESSOR
FRONT STUB SHAFT ASSEMBLY
72−32−31
01−350
A
STAGE 8 DISC
IP COMPRESSOR
ROTOR SHAFT 
72−32−31
01−450 STAGE 7 DISC
STAGE 6 DISC
STAGE 5 DISC
STAGE 4 DISC
STAGE 3 DISC
STAGE 2 DISC
STAGE 1 DISC
IP COMPRESSOR
CURVIC RING
72−32−31
01−125
AA
DIMENSIONS ARE IN MILLIMETERS (INCHES)
THE SURFACE TEXTURE VALUES ARE IN MICROMETERS (MICROINCHES)
THE SURFACE TEXTURE TO BE 1,6 (63) UNLESS SPECIFIED DIFFERENTLY
GEOMETRIC SYMBOLS ARE GIVEN IN THE ISO MANUAL R1101
REMOVE THE SHARP EDGES 0,10 TO 0,50 (0.004 TO 0.020)
MACHINE WHERE SHOWN 
SECTION THROUGH THE IP COMPRESSOR 
STAGES 1 TO 8 ROTOR SHAFT ASSEMBLY 
C
REWORK OF THE IP COMPRESSOR STAGES 1 TO 8 ROTOR SHAFT ASSEMBLY
General section view (Part 1)
Figure 1
Printed in Great Britain
TRENT 1000 72−K571
Page 42
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 46

dem0002663
STAGE 1−2
SEAL FINS
AB
SECTION THROUGH THE IP COMPRESSOR
 STAGES 1 TO 8 ROTOR SHAFT ASSEMBLY
TO SHOW THE SEAL FINS PROTECTOR DETAILS
REWORK OF THE IP COMPRESSOR STAGES 1 TO 8 ROTOR SHAFT ASSEMBLY
STAGE 2−3
SEAL FINS
STAGE 3−4
SEAL FINS
STAGE 4−5
SEAL FINS
STAGE 5−6
SEAL FINS
STAGE 7−8
SEAL FINS
STAGE 8
SEAL FINS
STAGE 6−7
SEAL FINS
RRT119768
PROTECTOR
PROTECTOR
TO COVER THE
3 SEAL FINS
RRT119757
RRT081239
PROTECTOR
(OPTIONAL)
RRT081238
PROTECTOR
(OPTIONAL)
PROTECTOR
RRT119758
PROTECTOR
RRT119760
PROTECTOR
RRT119762
PROTECTOR
RRT119763 PROTECTOR
RRT119764
PROTECTOR
RRT119765
PROTECTOR
RRT119766
PROTECTOR
RRT119767
Protector details (Part 1)
Figure 2
Printed in Great Britain
TRENT 1000 72−K571
Page 43
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 47

dem0002666
POLYETHYLENE 
SHRINK WRAP
RRT119755
POLYMER TROUGH
REWORK OF THE IP COMPRESSOR STAGES 1 TO 8 ROTOR SHAFT ASSEMBLY
Shrink wrap details (Part 1)
Figure 3
Printed in Great Britain
TRENT 1000 72−K571
Page 44
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 48

POLYETHYLENE
SHRINK WRAP
dem0002671 REWORK OF THE IP COMPRESSOR STAGES 1 TO 8 ROTOR SHAFT ASSEMBLY
RRT119745
BASE PLATE
RRT119753
POLYMER TOP HAT COVER
RRT119747 OR
RRT119748
POLYMER
PROTECTORS
SHAFT CENTRALISER
Part arrangement on base plate (Part 1)
Figure 4
Printed in Great Britain
TRENT 1000 72−K571
Page 45
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 49

dem0002661
FRONT SEAL ARM
B
(ø480,46 (18,916))
A
STAGE 8 DISC
IP COMPRESSOR
ROTOR SHAFT 
72−32−31
01−450 STAGE 7 DISC
STAGE 6 DISC
STAGE 5 DISC
STAGE 4 DISC
STAGE 3 DISC
STAGE 2 DISC
STAGE 1 DISC
AA
DIMENSIONS ARE IN MILLIMETERS (INCHES)
THE SURFACE TEXTURE VALUES ARE IN MICROMETERS (MICROINCHES)
THE SURFACE TEXTURE TO BE 1,6 (63) UNLESS SPECIFIED DIFFERENTLY
GEOMETRIC SYMBOLS ARE GIVEN IN THE ISO MANUAL R1101
REMOVE THE SHARP EDGES 0,10 TO 0,50 (0.004 TO 0.020)
MACHINE WHERE SHOWN 
SECTION THROUGH THE IP COMPRESSOR 
STAGES 1 TO 8 ROTOR SHAFT ASSEMBLY 
C
REWORK OF THE IP COMPRESSOR STAGES 1 TO 8 ROTOR SHAFT ASSEMBLY
General section view (Part 2)
Figure 5
Printed in Great Britain
TRENT 1000 72−K571
Page 46
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 50

dem0002664
STAGE 2−3
SEAL FINS
RRT081240
PROTECTOR
RRT081241
PROTECTOR
RRT091632
PROTECTOR
RRT081243
PROTECTOR
RRT091633
PROTECTOR
RRT119768
PROTECTOR
STAGE 3−4
SEAL FINS
STAGE 4−5
SEAL FINS
STAGE 5−6
SEAL FINS
STAGE 7−8
SEAL FINS
STAGE 8
SEAL FINS
STAGE 6−7
SEAL FINS
STAGE 1−2
SEAL FINS
AB
SECTION THROUGH THE IP COMPRESSOR
 STAGES 1 TO 8 ROTOR SHAFT ASSEMBLY
TO SHOW THE SEAL FINS PROTECTOR DETAILS
REWORK OF THE IP COMPRESSOR STAGES 1 TO 8 ROTOR SHAFT ASSEMBLY
RRT081239
PROTECTOR
RRT081238
PROTECTOR
PROTECTOR
TO COVER THE
3 SEAL FINS
RRT119757
RRT119758
PROTECTOR
RRT119760
PROTECTOR
Protector details (Part 2)
Figure 6
Printed in Great Britain
TRENT 1000 72−K571
Page 47
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 51

THE STUB SHAFT IS SHOWN ONLY FOR DEPICTION PURPOSES
dem0002672 REWORK OF THE IP COMPRESSOR STAGES 1 TO 8 ROTOR SHAFT ASSEMBLY
RRT119745
BASE PLATE
RRT026842
DUMMY STUBSHAFT
RRT119747 OR
RRT119748
SHAFT CENTRALISER
Part arrangement on base plate (Part 2)
Figure 7
Printed in Great Britain
TRENT 1000 72−K571
Page 48
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 52

dem0002662
FRONT SEAL ARM
STAGE 8 BLADE
STAGE 7 BLADE
STAGE 6 BLADE
STAGE 5 BLADE
STAGE 3 BLADE
B
(ø480,46 (18,916))
IP COMPRESSOR
FRONT STUB SHAFT ASSEMBLY
72−32−31
01−350
A
STAGE 8 DISC
IP COMPRESSOR
ROTOR SHAFT 
72−32−31
01−450 STAGE 7 DISC
STAGE 6 DISC
STAGE 5 DISC
STAGE 4 DISC
STAGE 3 DISC
STAGE 2 DISC
STAGE 1 DISC
IP COMPRESSOR
CURVIC RING
72−32−31
01−125
AA
DIMENSIONS ARE IN MILLIMETERS (INCHES)
THE SURFACE TEXTURE VALUES ARE IN MICROMETERS (MICROINCHES)
THE SURFACE TEXTURE TO BE 1,6 (63) UNLESS SPECIFIED DIFFERENTLY
GEOMETRIC SYMBOLS ARE GIVEN IN THE ISO MANUAL R1101
REMOVE THE SHARP EDGES 0,10 TO 0,50 (0.004 TO 0.020)
MACHINE WHERE SHOWN 
SECTION THROUGH THE IP COMPRESSOR 
STAGES 1 TO 8 ROTOR SHAFT ASSEMBLY 
STAGE 2 BLADE
STAGE 1 BLADE
STAGE 4 BLADE
C
REWORK OF THE IP COMPRESSOR STAGES 1 TO 8 ROTOR SHAFT ASSEMBLY
General section view (Part 3)
Figure 8
Printed in Great Britain
TRENT 1000 72−K571
Page 49
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 53

dem0002665
PROTECTOR
TO COVER THE
3 SEAL FINS
AB
SECTION THROUGH THE IP COMPRESSOR
 STAGES 1 TO 8 ROTOR SHAFT ASSEMBLY
TO SHOW THE SEAL FINS PROTECTOR DETAILS
RRT119757
REWORK OF THE IP COMPRESSOR STAGES 1 TO 8 ROTOR SHAFT ASSEMBLY
STAGE 2−3
SEAL FINS
STAGE 3−4
SEAL FINS
STAGE 4−5
SEAL FINS
STAGE 5−6
SEAL FINS
STAGE 7−8
SEAL FINS
STAGE 8
SEAL FINS
STAGE 6−7
SEAL FINS
STAGE 1−2
SEAL FINS
PROTECTOR
RRT119759
PROTECTOR
RRT119761
PROTECTOR
RRT119762
PROTECTOR
RRT119763
PROTECTOR
RRT119764
PROTECTOR
RRT119765
PROTECTOR
RRT119766
PROTECTOR
RRT119767
RRT119768
PROTECTOR
Protector details (Part 3)
Figure 9
Printed in Great Britain
TRENT 1000 72−K571
Page 50
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 54

dem0002668
POLYETHYLENE 
SHRINK WRAP
RRT119755
POLYMER TROUGH
REWORK OF THE IP COMPRESSOR STAGES 1 TO 8 ROTOR SHAFT ASSEMBLY
Shrink wrap details (Part 3)
Figure 10
Printed in Great Britain
TRENT 1000 72−K571
Page 51
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 55

dem0002673 REWORK OF THE IP COMPRESSOR STAGES 1 TO 8 ROTOR SHAFT ASSEMBLY
RRT119753
POLYMER TOP HAT COVER
RRT119745
BASE PLATE
POLYMER
PROTECTORS
POLYETHYLENE
SHRINK WRAP
RRT119747 OR
RRT119748
SHAFT CENTRALISER
Part arrangement on base plate (Part 3)
Figure 11
Printed in Great Britain
TRENT 1000 72−K571
Page 52
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 56

dem0002667
TO SHOW THE LOCK DETAILS
OF THE PROTECTORS 
VELCRO STRAP
TYPICAL AT ALL STAGES
TO SHOW THE UNLOCK DETAILS
OF THE PROTECTORS 
TYPICAL AT ALL STAGES
VIEW ACVIEW AB
REWORK OF THE IP COMPRESSOR STAGES 1 TO 8 ROTOR SHAFT ASSEMBLY
SPLIT LINE
AC
Protector lock/unlock details (All parts)
Figure 12
Printed in Great Britain
TRENT 1000 72−K571
Page 53
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 57

VIEW AT AA
TO SHOW THE MACHINING DETAILS
C
9,35  0.368
8,75  0.344
dem0002669
DIMENSION Y
DIMENSION X
REWORK OF THE IP COMPRESSOR STAGES 1 TO 8 ROTOR SHAFT ASSEMBLY
Machining details (All parts)
Figure 13
Printed in Great Britain
TRENT 1000 72−K571
Page 54
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 58

HOIST
THUMB SCREW
(2 off)
LIFTER
PEG
LOCKING
LOCKING
SLEEVE
IP COMPRESSOR
STUB SHAFT
72−32−31
01−350
PLATE
(2 off)
(2 off)
dem0002670
ADAPTER
NCU11636−3
ADAPTER
RRT119749
REWORK OF THE IP COMPRESSOR STAGES 1 TO 8 ROTOR SHAFT ASSEMBLY 
(DAMPENING RING ASSEMBLY REMOVED)
NOT TO SCALE
Lifting/Clamping details (All parts)
Figure 14
Printed in Great Britain
TRENT 1000 72−K571
Page 55
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 59

HOIST
THUMB SCREW
(2 off)
LIFTER
PEG
LOCKING
LOCKING
SLEEVE
IP COMPRESSOR
STUB SHAFT
72−32−31
01−350
PLATE
(2 off)
(2 off)
dem0002697
ADAPTER
NCU11636−3
ADAPTER
RRT119750
LIFTING COLLAR
RRT119754
REWORK OF THE IP COMPRESSOR STAGES 1 TO 8 ROTOR SHAFT ASSEMBLY 
(DAMPENING RING ASSEMBLY REMOVED)
NOT TO SCALE
Lifting/Clamping details (All parts)
Figure 15
Printed in Great Britain
TRENT 1000 72−K571
Page 56
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

### Page 60

dem0002691
RRT119751
LIFTING EYE TOOL
RRT119745
BASE PLATE
REWORK OF THE IP COMPRESSOR STAGES 1 TO 8 ROTOR SHAFT ASSEMBLY
THE DAMPENING
RING PIN
RRT119747 OR
RRT119748
SHAFT CENTRALISER
RRT119756
DAMPENING RING ASSSEMBLY
Tooling details (All parts)
Figure 16
Printed in Great Britain
TRENT 1000 72−K571
Page 57
Jun.15/21
Jun.15/21
TRENT 1000 SERIES
SERVICE BULLETIN

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