### 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 THE IR SUPPORTABLE LIVES

November 2012 7 Pages 7 2

- A206 Page 1 Use or disclosure of this information is subject to
The restri ctions on the title page of this document 1. PLANNING INFORMATION

A. Effectivity

(1) Engine s affected: All installed and uninstalled Viper Mk. 601

- 22 engines

(2) Asse mbl ies 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 doc umented 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 THE IR SUPPORTABLE LIVES

72

- A20 6 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 Flig ht 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 unsuppor t able 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

- 0 1
, Table 1

(5) Both the above Manuals will be updated to reflect the revised cleared life in flight cycles published in Table 1 a bove.

### ROLLS

- ROYCE plc 

# S ERVICE BULLETINS

Mk 601

- 22 Number 72

- A206

ENGINE

- REVISED COMPONENT GROUP A LIVES AND REMOVAL FROM SERVICE OF
COMPONENTS THAT HAVE OPERATED BEYOND THE IR SUPPORTABLE LIVES

November 2012 7 2

- 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 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 for the Compressor Shaft, Compressor rear Stubshaft (centre bearing hub), Combustion Chamber Outer Casing

.

(4) Installed engines

- I mmediately upon receipt of this
S ervice B ulletin

.

(5) Engines not i nstalled

- 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 Bullet in 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 THE IR SUPPORTABLE LIVES

72

- A20 6 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

- 0 1 , Table 1

2

. ACCOMPLISHMENT INSTRUCTIONS

A. Installed and Uninstalled engines

( 1 ) Check the engine log book to establish th e 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 T able 1 at
Para 1.C. of this bulletin, the engine must be removed from service operation. Proceed to R ecording
I nstructions 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

r emoval 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 l ife 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 THE IR SUPPORTABLE LI VES

November 2012 7 2

- 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 compon ent 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 revis ed 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 compon ent log card/relevant document to reflect the revised flight cycle life of the Compressor Shaft, Com pressor rear Stubshaft (centre bearing hub), and Combustion Chamber Outer Casing as detailed in Table 1 at Para 1.C. of this bulletin, and r ecord 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 THE IR SUPPORTABLE LIVES

72

- A20 6 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 (cen tre 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 compon ent 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 re cord compliance with SB72

- A206.

( 2 ) Uni nstalled 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 bea ring 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 cycl e 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 THE IR SUPPORTABLE LI VES

November 2012 7 2

- 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 r ear 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 Pa ra 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

cy cle 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. Re porting Compl iance

Compliance with this Service Bulletin is to be reported to
Rolls

- Royce plc for each component.