ROLLS-ROYCE plc

SERVICE BULLETINS

Mk 601-22 Number 72-A206

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

COMPONENTS THAT HAVE OPERATED BEYOND THEIR SUPPORTABLE LIVES

November 2012 7 Pages 72-A206

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: Compressor Shaft, Compressor rear 

Stubshaft (centre bearing hub), 

Combustion Chamber Outer Casing

B. Reason

A review of Group A Lifing by Rolls-Royce has resulted in 

reduced Flight Cycle Lives for the Compressor Shaft, 

Compressor rear Stubshaft (centre bearing hub) and the 

Combustion Chamber Outer Casing. 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

SERVICE BULLETINS

Mk 601-22 Number 72-A206

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

COMPONENTS THAT HAVE OPERATED BEYOND THEIR SUPPORTABLE LIVES

72-A206 November 2012

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:

Component Part No.

Present 

Cleared Life 

in Flight 

Cycles

Revised 

Cleared Life 

in Flight 

Cycles 

Compressor 

Shaft

V900766 25900 20720 

Compressor rear 

Stubshaft 

centre bearing 

hub

V900007

V900994

12000

 

 

9600 

Combustion 

Chamber Outer 

Casing

V950013

V950331

40000

 

 

32000 

Table 1 - Revised Group ‘A’ Component Lives

(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 of the Group ‘A’ components in 

Table 1 above are published in:

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

Table 1

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

Table 1

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

revised cleared life in flight cycles published in 

Table 1 above.
ROLLS-ROYCE plc

SERVICE BULLETINS

Mk 601-22 Number 72-A206

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

COMPONENTS THAT HAVE OPERATED BEYOND THEIR SUPPORTABLE LIVES

November 2012 72-A206

Page 3

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 Compressor Shaft, Compressor rear 

Stubshaft (centre bearing hub), Combustion Chamber 

Outer Casing.

(4) Installed engines - Immediately upon receipt of this

Service Bulletin.

(5) Engines not installed - Prior to installation.

(6) Uninstalled Compressor Shaft, Compressor rear 

Stubshaft (centre bearing hub), and Combustion Chamber 

Outer Casing - 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 31 October 2012.

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 Maintenance Manual

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

SERVICE BULLETINS

Mk 601-22 Number 72-A206

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

COMPONENTS THAT HAVE OPERATED BEYOND THEIR SUPPORTABLE LIVES

72-A206 November 2012

Page 4

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 Maintenance Manual, Chapter 5-

10-00, Table 1

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

01, Table 1

2. ACCOMPLISHMENT INSTRUCTIONS

A. Installed and Uninstalled engines

(1) Check the engine log book to establish the TSN flight 

cycles of the Compressor Shaft, Compressor rear 

Stubshaft (centre bearing hub), Combustion Chamber 

Outer Casing. If the component life TSN is greater 

than the revised flight cycles detailed in Table 1 at 

Para 1.C. of this bulletin, the engine must be removed 

from service operation. Proceed to Recording 

Instructions at Para 2.C.

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

detailed in Table 1 at Para 1.C. 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 

detailed in Table 1 at Para 1.C. of this bulletin 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 detailed in Table 1 at Para 1.C. of this 

bulletin, and the components will not exceed the 

revised life if operated to the next planned removal 

date then proceed to Recording Instructions at Para 

2.C. of this bulletin.
ROLLS-ROYCE plc

SERVICE BULLETINS

Mk 601-22 Number 72-A206

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

COMPONENTS THAT HAVE OPERATED BEYOND THEIR SUPPORTABLE LIVES

November 2012 72-A206

Page 5

Use or disclosure of this information is subject to

The restrictions on the title page of this document

B. Compressor Shaft, Compressor rear Stubshaft (centre 

bearing hub), and Combustion Chamber Outer Casing not 

fitted to engines.

(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 at Para 1.C. 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 at Para 1.C. 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 Compressor Shaft, 

Compressor rear Stubshaft (centre bearing hub), 

and Combustion Chamber Outer Casing that have 

exceeded the revised flight cycle life detailed in 

Table 1 at Para 1.C. of this bulletin, endorse the 

engine log book with ‚Engine removed from service 

operation for Group ‘A’ life expiry in accordance 

with SB72-A206.‛

(b) Installed engines that contain Compressor Shaft, 

Compressor rear Stubshaft (centre bearing hub), 

and Combustion Chamber Outer Casing that have not 

exceeded the revised flight cycle life as detailed 

in Table 1 at Para 1.C. of this bulletin, but will 

exceed the revised flight cycle life 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 the 

Compressor Shaft, Compressor rear Stubshaft 

(centre bearing hub), and Combustion Chamber Outer 

Casing as detailed in Table 1 at Para 1.C. of this 

bulletin, and record compliance with SB72-A206.
ROLLS-ROYCE plc

SERVICE BULLETINS

Mk 601-22 Number 72-A206

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

COMPONENTS THAT HAVE OPERATED BEYOND THEIR SUPPORTABLE LIVES

72-A206 November 2012

Page 6

Use or disclosure of this information is subject to

The restrictions on the title page of this document

(c) Installed engines that contain Compressor Shaft, 

Compressor rear Stubshaft (centre bearing hub), 

and Combustion Chamber Outer Casing that have not 

exceeded the revised flight cycle life detailed in 

Table 1 at Para 1.C. of this bulletin, and will 

not exceed the revised life 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 the 

Compressor Shaft, Compressor rear Stubshaft 

(centre bearing hub), and Combustion Chamber Outer 

Casing as detailed in Table 1 at Para 1.C. of this 

bulletin, and record compliance with SB72-A206.

(2) Uninstalled Engines

(a) Uninstalled engines that contain Compressor Shaft, 

Compressor rear Stubshaft (centre bearing hub), 

and Combustion Chamber Outer Casing that have 

exceeded the revised flight cycle life as detailed

in Table 1 at Para 1.C. of this bulletin endorse 

the engine log book with ‚Engine declared 

unserviceable for Group ‘A’ life expiry in 

accordance with SB72-A206‛.

(b) Uninstalled engines that contain Compressor Shaft, 

Compressor rear Stubshaft (centre bearing hub), 

and Combustion Chamber Outer Casing that have not 

exceeded the revised flight cycle life as detailed 

in Table 1 at Para 1.C. of this bulletin, amend 

the engine log book and component log 

card/relevant document to reflect the revised 

flight cycle life of the Compressor Shaft, 

Compressor rear Stubshaft (centre bearing hub), 

and Combustion Chamber Outer Casing as detailed in 

Table 1 at Para 1.C. of this bulletin, and record 

compliance with SB72-A206.
ROLLS-ROYCE plc

SERVICE BULLETINS

Mk 601-22 Number 72-A206

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

COMPONENTS THAT HAVE OPERATED BEYOND THEIR SUPPORTABLE LIVES

November 2012 72-A206

Page 7/8

Use or disclosure of this information is subject to

The restrictions on the title page of this document

(3) Uninstalled Compressor Shaft, Compressor rear 

Stubshaft (centre bearing hub), and Combustion Chamber 

Outer Casing

(a) Compressor Shaft, Compressor rear Stubshaft 

(centre bearing hub), and Combustion Chamber Outer 

Casing that have exceeded the revised flight cycle 

life as detailed in Table 1 at Para 1.C. of this 

bulletin endorse the component log card with ‚Life 

Expired in accordance with SB72-A206‛.

(b) Compressor Shaft, Compressor rear Stubshaft 

(centre bearing hub), and Combustion Chamber Outer 

Casing that have not exceeded the revised flight 

cycle life as detailed in Table 1 at Para 1.C. of 

this bulletin amend the component log 

card/relevant document to reflect the revised 

flight cycle life detailed in Table 1 at Para 1.C.

of this bulletin and record compliance with SB72-

A206.

D. Reporting Compliance

Compliance with this Service Bulletin is to be reported to 

Rolls-Royce plc for each component.