### ROLLS

- ROYCE plc



# ALERT SERVICE BULLETIN

Mk. 52 2 Number 72

- A4 13

Circulation A

ENGINE

- REVISED COMPONENT GROUP A LIVES AND REMOVAL FROM SERVICE OF

COMPONENTS THAT HAVE OPERATED BEYOND THE IR SUPPORTABLE LIVES

January 2015 8 Pages 7 2

- A413

Page 1

Use or disclosure of this information is subject to The restrictions on the title page of this document 1. PLANNING INFORMATION

A. Effectivity

(1) Engine s affected: All inst alled and uninstalled Viper

Mk. 52 2 engines

(2) Asse mbl ies affected: All Group A components as detailed

in Table 1.

B. Reason

A review of Group A Lifing by Rolls

- Royce plc has resulted in reduced Flight Cycle Lives for the components listed in

Table 1.

Group A lives for these components that are presently documented in the Viper Mk. 52 2 Overhaul and Maintenance Manuals are unsupported.

Performance : Not affected Reliability : Improved

Maintenance : Not affected

Overhaul : Affected Repair Schemes : Not affected Interchangeability : Not affected

### ROLLS

- ROYCE plc



# ALERT SERVICE BULLETIN

Mk. 52 2 Number 72

- A4 13

Circulation A

ENGINE

- REVISED COMPONENT GROUP A LIVES AND REMOVAL FROM SERVICE OF

COMPONENTS THAT HAVE OPERATED BEYOND THE IR SUPPORTABLE LIVES

72

- A413 January 2015

Page 2 Use or disclosure of this information is subject to The restrictions on the title page of this document C. Description

(1) This ALERT Service Bulletin instructs operators to implement the revised supported cleared lives in flight cycles for the following components detailed in

Table 1.

Table 1

- Revised Group A Component Lives

Item Part No. Present c leared cyclic life (flights) Ref

Time Limits Chapter 5

- 10

- 01

of Overhaul

Manual dated Feb

2013 Revised

Cleared Cyclic Life (flights)

Compressor Rotor

Discs

Zero stage V27415

V56418 18900

18900 5623

5623

1 st stage V27418

V900633

V901351 7030

13000

13000 1525

11600

11600

2 nd stage V27421

V41178

V901360 11475

11475

11475 2867

11474

11474

3rd stage V27424

V41180

V901361 14075

14075

14075 2452

12160

12160

4th stage V27427

V901362 14075

14075 12160

12160

5th stage V27430

V42057

V901363 12600

12600

12600 2074

10480

10480

### ROLLS

- ROYCE plc



# ALERT SERVICE BULLETIN

Mk. 52 2 Number 72

- A4 13

Circulation A

ENGINE

- REVISED COMPONENT GROUP A LIVES AND REMOVAL FROM SERVICE OF

COMPONENTS THAT HAVE OPERATED BEYOND THE IR SUPPORTABLE LIVES

January 2015 7 2

- A413

Page 3

Use or disclosure of this information is subject to The restrictions on the title page of this document Table 1

- Revised Group A Component Lives (cont.)

Item Part No. Present c leared cyclic life (flights) Ref

Time Limits Chapter 5

- 10

- 01

of Overhaul

Manual dated Feb

2013 Revised

Cleared Cyclic

Life (flights)

6th stage V27433

V42059

V901364 12600

12600

12600 2074

12000

12000

7th stage (front) V28382

V42062

V28501

V901365 2800

2800

16200

16200 702

702

7673

7673

7th stage (rear) V28383

V42061

V28502

V901366 2800

2800

16200

16200 702

702

7673

7673

7th stage sub unit (comprising V28501

front & V28502 rear

discs) V35813 16200 7673

7th stage sub unit (comprising V901365

front & V901366 rear

discs) V901359 16200 7673

Rotating Shrouds

Zero Stage V24671

V44045

V53088

V110422 5500

5500

5500

5500 5500 F

5500 F

5500 F

5500 F

### ROLLS

- ROYCE plc



# ALERT SERVICE BULLETIN

Mk. 52 2 Number 72

- A4 13

Circulation A

ENGINE

- REVISED COMPONENT GROUP A LIVES AND REMOVAL FROM SERVICE OF

COMPONENTS THAT HAVE OPERATED BEYOND THE IR SUPPORTABLE LIVES

72

- A413 January 2015

Page 4 Use or disclosure of this information is subject to

The restrictions on the title page of this document Table 1

- Revised Group A Component Lives (cont.)

Item Part No. Present c leared cyclic life (flights) Ref

Time Limits Chapter 5

- 10

- 01

of Overhaul

Manual dated Feb

2013 Revised Cleared Cyclic Life (flights)

6th stage V26812

V27891

V44051

V48723

V107239

V109011

V110430 3900

Unrestricted

Unrestricted

Unrestricted

Unrestricted

Unrestricted

Unrestricted 3900 F

Unrestricted

Unrestricted

Unrestricted

Unrestricted

Unrestricted

Unrestricted

Turbine Mainshaft

V29405

V44068

V42839 ND

V36910

V36911

V36912 20000

20000

20000

5000

5000

5000 5014

5014

5014

1254

1254

1254

Turbine Disc

V27504

V56348 14690

14690 5998

5998

Combustion

Chamber Casing

V22713

V44477

V45669

V45694 15000

15000

15000

15000 5396

5396

5396

5396

### ROLLS

- ROYCE plc



# ALERT SERVICE BULLETIN

Mk. 52 2 Number 72

- A4 13

Circulation A

ENGINE

- REVISED COMPONENT GROUP A LIVES AND REMOVAL FROM SERVICE OF

COMPONENTS THAT HAVE OPERATED BEYOND THE IR SUPPORTABLE LIVES

January 2015 7 2

- A413

Page 5

Use or disclosure of this information is subject to The restrictions on the title page of this d ocument (2) Any components that have operated beyond the revised cleared life in flight cycles must be removed from service operation

.

(3) Engine log books and component log cards must be

amended with the revised lives.

(4) The unsuppor t able l ives in Table 1 of this Bulletin are published in:

(a) Viper Mk.52 2 Overhaul Manual, Chapter 5

- 10 , Table 1

(b) Viper Mk.522 Maintenance Manual, Chapter 5

- 10

- 00

, Table 1

(5) Both the above Manual s will be updated to reflect the revised cleared life in flight cycles published in

Table 1

.

D. Compliance

(1) It is anticipated that this Alert Service Bulletin

will become the s ubject of an EASA Airworthiness

Directive.

(2) Mandatory: on r eceipt of this Service Bulletin

.

(3) Refer to Engine log book and/or the component log card to establish the Time Since New (TSN) flight cycles

life fo r the Group A components in Table 1

.

(4) Installed engines

- I mmediately upon receipt of this

S ervice B ulletin

.

(5) Engines not installed

- Prior to installation

.

(6) Uninstalled Group A components in Table 1

- Prior to installation in an engine

.

E. Approval

The technical content of this ALERT Service Bulletin was

approved under the authority of Design Organisation

Approval EASA.21J.035 on 6 th November 201 4

.

F. Manpower

- Field Embodiment

Not applicable

### ROLLS

- ROYCE plc



# ALERT SERVICE BULLETIN

Mk. 52 2 Number 72

- A4 13

Circulation A

ENGINE

- REVISED COMPONENT GROUP A LIVES AND REMOVAL FROM SERVICE OF

COMPONENTS THAT HAVE OPERATED BEYOND THE IR SUPPORTABLE LIVES

72

- A4 13 January 2015

Page 6 Use or disclosure of this information is subject to The restrictions on the title page of this document G. Material

- Cost and Availability

Price and availability from Rolls

- Royce on request.

H. Tooling

- Cost and Availability

No additional special tools are required.

I. Weight and Balance

Engine weight change None

J. Reference

Viper Mk. 52 2 Engine Overhaul Manual

Viper Mk.522 Engine Maintenance Manual

K. Publications Affected

Viper M k.52 2 Engine Overhaul Manual, Chapter 5

- 10 , Table 1

Viper M k.52 2 Engine Maintenance Manual, Chapter 5

- 10

- 00

, Table 1

2

. ACCOMPLISHMENT INSTRUCTIONS

A. Installed and Uninstalled E ngines

( 1 ) Check the engine log book to establish the TSN flight cycles of each Group A component. If the component life TSN is greater than the revised flight cycles

life limit detailed in T able 1 of this bulletin, the engine must be removed from service operation. Proceed

to R ecording I nstructions at Para 2.C of this

bulletin

.

( 2 ) If the component life TSN is below the flight cycles

detailed in Table 1 of this bulletin, but will exceed

this tota l if operated to the next planned removal point, then the engine may continue in service operation until the revised flight cycle life limit is reached. Proceed to Recording Instructions at Para

2.C. of this bulletin.

( 3 ) If the component life TSN is below the revised flight cycles life limit detailed in Table 1 of t his bulletin, and the component will not exceed th is total if operated to the next planned removal date then proceed to Recording Instructions at Para 2.C. of this

bulletin.

### ROLLS

- ROYCE plc



# ALERT SERVICE BULLETIN

Mk. 52 2 Number 72

- A4 13

Circulation A

ENGINE

- REVISED COMPONENT GROUP A LIVES AND REMOVAL FROM SERVICE OF

COMPONENTS THAT HAVE OPERATED BEYOND THE IR SUPPORTABLE LIVES

January 2015 7 2

- A413

Page 7

Use or disclosure of this information is subject to The restrictions on the title page of this document B. Uninstalled Group A Components

.

(1) Check the component log card/relevant document to establish the TSN flight cycles of the component. If the component life TSN is greater than the revised flight cycle life limit detailed in Table 1 of this bulletin, the component must be rejected. Proceed to Recording Instructions at Para 2.C. of this bulletin.

(2) If the component life TSN is below the revised flight cycle life limit detailed in Table 1 of this bulletin then proceed to Recording Instructions at Para 2.C. of

this bulletin.

C

. Recording Instructions

(1) Installed Engines

(a) Installed engines that contain Group A components

that have exceeded the revised flight cycle life

limit detailed in Table 1 of this bulletin,

endorse the engine log book with “Engine removed

from service oper ation for Group A life expiry in

accordance with SB72

- A 4 13 .”

(b) Installed engines that contain Group A components

that have not exceeded the revised flight cycle

life limit as detailed in Table 1 of this

bulletin, but will exceed the revised flight cycle

life limit before the next planned engine removal,

amend the engine log book and compon ent log

card/relevant document to reflect the revised

flight cycle life limit of each Group A component

as detailed in Table 1 of this bulletin, and

r ecord compliance with SB72

- A 4 13

.

(c) Installed engines that contain Group A components

that have not exceeded the revised flight cycle

life limit detailed in Table 1 of this bulletin,

and will not exceed the life limit before the next

planned engine removal, amend the engine log book

and compon ent log card/relevant document to

reflect the r evised flight cycle life limit of

each Group A component as detailed in Table 1 of

this bulletin, and record compliance with SB72

-

A 4 13

.

### ROLLS

- ROYCE plc



# ALERT SERVICE BULLETIN

Mk. 52 2 Number 72

- A4 13

Circulation A

ENGINE

- REVISED COMPONENT GROUP A LIVES AND REMOVAL FROM SERVICE OF

COMPONENTS THAT HAVE OPERATED BEYOND THE IR SUPPORTABLE LIVES

72

- A413 January 2015

Page 8 Use or disclosure of this information is subject to The restrictions on the title page of this document ( 2 ) Uni nstalled Engines

(a) Uni nstalled engines that contain Group A

components that have exceeded the revised flight

cycle life limit as detailed in Table 1 of this

bulletin endorse the engine log book with “Engine

declared unserviceabl e for Group A life expiry in

accordance with SB72

- A 4 13 ”

.

(b) U ninstalled engines that contain Group A

components that have not exceeded the revised

flight cycle life limit as detailed in Table 1 of

this bulletin, amend the engine log book and

compo nent log card/relevant document to reflect

the revised flight cycle life of each Group A

component as detailed in Table 1 of this bulletin,

and record compliance with SB72

- A 4 13

.

(3) Uninstalled Group A C omponents

(a) Components that have exceeded the revised flight

cycle life limit as detailed in Table 1 of this

bulletin

, endorse the component log card with

“Life Expired in accordance with SB72

- A 4 13 ”.

(b) Components that have not exceeded the revised

flight cycle life limit as detailed in Table 1 of

this bulletin

, amend the component log

card/relevant document to reflect t he revised

flight cycle life limit detailed in Table 1 of

this bulletin and record compliance with SB72

-

A 4 13

.

D. Re porting Compliance

Compliance with this Service Bulletin is to be reported to

Rolls

- Royce plc for each component.