ROLLS-ROYCE plc

ALERT SERVICE BULLETIN

Mk 601-22 Number 72-A207

ENGINE - REVISED COMPONENT GROUP A LIVES AND REMOVAL FROM SERVICE OF

COMPONENTS THAT HAVE OPERATED BEYOND THEIR SUPPORTABLE LIVES

January 2015 8 Pages 72-A207

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) Engines affected: All installed and uninstalled Viper 

Mk. 601-22 engines

(2) Assemblies 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 601-22 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 601-22 Number 72-A207

ENGINE - REVISED COMPONENT GROUP A LIVES AND REMOVAL FROM SERVICE OF

COMPONENTS THAT HAVE OPERATED BEYOND THEIR SUPPORTABLE LIVES

72-A207 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 

cleared 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 V900022

V901388

16100 

16100 

11280

11280

1st stage V27418

V900633

V901351

7030 

13000 

13000

1525

11600

11600

2nd stage V41178

V901360

11475 

11475

11476

11476

3rd stage V41180

V901361

14075

14075

12160

12160

4th stage V27427

V901362

14075

14075

12160

12160

5th stage V42057

V901363

12600

12600

10480

10480

6th stage V42059

V901364

12600 

12600 

12000

12000

7th stage (front) V28501

V901365

16200

16200

7673

7673
ROLLS-ROYCE plc

ALERT SERVICE BULLETIN

Mk 601-22 Number 72-A207

ENGINE - REVISED COMPONENT GROUP A LIVES AND REMOVAL FROM SERVICE OF

COMPONENTS THAT HAVE OPERATED BEYOND THEIR SUPPORTABLE LIVES

January 2015 72-A207

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 

cleared cyclic 

life (flights) 

Ref Time 

Limits Chapter 

5-10-01 of 

Overhaul 

Manual dated 

Feb 2013

Revised 

Cleared 

Cyclic 

Life 

(flights)

7th stage (rear) V28502

V901366

16200

16200

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

Compressor Mainshaft V900008

V900053

V900648

20720

20720

20720

5431

5431

11920

Centre Bearing Hub V900007

V900994

9600

9600

9600

9600

Turbine Mainshaft V950036

V950211

V950707

V950819

12000

12000

12000

12000

3481

3481

3481

3481

Turbine Disc Stage 1 V900003

V901328

12000

12000

12000

12000

Turbine Disc Stage 2 V900004

V900259

V901332

15800

15800

15800

4446

15800

15800
ROLLS-ROYCE plc

ALERT SERVICE BULLETIN

Mk 601-22 Number 72-A207

ENGINE - REVISED COMPONENT GROUP A LIVES AND REMOVAL FROM SERVICE OF

COMPONENTS THAT HAVE OPERATED BEYOND THEIR SUPPORTABLE LIVES

72-A207 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 

cleared cyclic 

life (flights) 

Ref Time 

Limits Chapter 

5-10-01 of 

Overhaul 

Manual dated 

Feb 2013

Revised 

Cleared 

Cyclic 

Life 

(flights)

Turbine Inter-stage 

Labyrinth Ring

V950018

V950111

V901330

V901331

13025 

13025 

13025 

13025

4939

4939

4939

4939

Combustion Chamber 

Outer Casing

V950013

V950331

32000

32000

8993

8993

(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 unsupportable lives in Table 1 of this Bulletin

are published in:

(a) Viper 601-22 Overhaul Manual, Chapter 5-10-01, 

Table 1

(b) Viper 601-22 Maintenance Manual, Chapter 5-10-00, 

Table 1

(5) Both the above Manuals will be updated to reflect the 

revised cleared life in flight cycles published in 

Table 1.
ROLLS-ROYCE plc

ALERT SERVICE BULLETIN

Mk 601-22 Number 72-A207

ENGINE - REVISED COMPONENT GROUP A LIVES AND REMOVAL FROM SERVICE OF

COMPONENTS THAT HAVE OPERATED BEYOND THEIR SUPPORTABLE LIVES

January 2015 72-A207

Page 5

Use or disclosure of this information is subject to

The restrictions on the title page of this document

D. Compliance

(1) It is anticipated that this Alert Service Bulletin 

will become the subject of an EASA Airworthiness 

Directive.

(2) Mandatory: on receipt 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 for the Group A components in Table 1.

(4) Installed engines - Immediately upon receipt of this

Service Bulletin.

(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 6th November 2014.

F. Manpower - Field Embodiment

Not applicable

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

(1) Viper Mk. 601-22 Engine Overhaul Manual

(2) Viper Mk. 601-22 Engine Maintenance Manual
ROLLS-ROYCE plc

ALERT SERVICE BULLETIN

Mk 601-22 Number 72-A207

ENGINE - REVISED COMPONENT GROUP A LIVES AND REMOVAL FROM SERVICE OF

COMPONENTS THAT HAVE OPERATED BEYOND THEIR SUPPORTABLE LIVES

72-A207 January 2015

Page 6 Use or disclosure of this information is subject to

The restrictions on the title page of this document

K. Publications Affected

(1) Viper MK 601-22 Engine Overhaul Manual, Chapter 5-10-

01, Table 1

(2) Viper MK 601-22 Engine Maintenance Manual, Chapter 5-

10-00, Table 1

2. ACCOMPLISHMENT INSTRUCTIONS

A. Installed and Uninstalled Engines

(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 Table 1 of this bulletin, the 

engine must be removed from service operation. Proceed 

to Recording Instructions 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 total 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 this 

bulletin, and the component will not exceed this total

if operated to the next planned removal date then 

proceed to Recording Instructions at Para 2.C. of this 

bulletin.

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 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 detailed in Table 1 of this bulletin then 

proceed to Recording Instructions at Para 2.C. of this 

bulletin.
ROLLS-ROYCE plc

ALERT SERVICE BULLETIN

Mk 601-22 Number 72-A207

ENGINE - REVISED COMPONENT GROUP A LIVES AND REMOVAL FROM SERVICE OF

COMPONENTS THAT HAVE OPERATED BEYOND THEIR SUPPORTABLE LIVES

January 2015 72-A207

Page 7

Use or disclosure of this information is subject to

The restrictions on the title page of this document

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 operation for Group A life expiry in 

accordance with SB72-A207.”

(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 component 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-A207.

(c) Installed engines that contain Group A components

that have not exceeded the revised flight cycle 

life 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 component 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 record compliance with SB72-

A207.

(2) Uninstalled Engines

(a) Uninstalled 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 unserviceable for Group A life expiry in 

accordance with SB72-A207”.
ROLLS-ROYCE plc

ALERT SERVICE BULLETIN

Mk 601-22 Number 72-A207

ENGINE - REVISED COMPONENT GROUP A LIVES AND REMOVAL FROM SERVICE OF

COMPONENTS THAT HAVE OPERATED BEYOND THEIR SUPPORTABLE LIVES

72-A207 January 2015

Page 8 Use or disclosure of this information is subject to

The restrictions on the title page of this document

(b) Uninstalled 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 

component 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-A207.

(3) Uninstalled Group A Components

(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-A207”.

(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 the revised 

flight cycle life limit detailed in Table 1 of 

this bulletin and record compliance with SB72-

A207.

D. Reporting Compliance

Compliance with this Service Bulletin is to be reported to 

Rolls-Royce plc for each component.