ROLLS-ROYCE pic 

ALERT SERVICE BULLETIN 

Mk.522 Number 72-A412 

Circulation B 

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

COMPONENTS THAT HAVE OPERATED BEYOND THEIR SUPPORTABLE LIVES 

1. PLANNING INFORMATION 

A. Effectivity 

(1) Engines affected: ALL installed and uninstalled Viper 

Mk.S22 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 

Table1. 

Group A Lives for these components that are presently 

documented in the Viper Mk.S22 Overhaul and Maintenance 

Manuals are unsupported. 

January 2015 

Performance 

ReliabiLity 

Maintenance 

Overhaul 

Repair Schemes 

InterchangeabiLity 

Not affected 

Improved 

Not affected 

Affected 

Not affected 

Not affected 

8 Pages 

Use or disclosure of this information is subject to 

The restrictions on the title page of this document 

72-A412 

Page 1 
ROLLS-ROYCE pic 

ALERT SERVICE BULLETIN 

Mk.522 Number 72-A412 

Circulation B 

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

COMPONENTS THAT HAVE OPERATED BEYOND THEIR SUPPORTABLE LIVES 

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 

Com!;!:ressor 

Discs 

Zero stage 

1st stage 

2nd stage 

3rd stage 

4th stage 

5th stage 

72-A412 

Page 2 

Rotor 

Present cleared 

cyclic Life 

(flights) Ref 

Time Limits 

Part No. Chapter 5-10-01 

of Overhaul 

Manual dated Feb 

2013 

V27415 18900 

V56418 18900 

V27418 7030 

V900633 13000 

V901351 13000 

V27421 11475 

V41178 114 75 

V901360 11 4 7 5 

V27424 14075 

V41180 14075 

V901361 1 4075 

V27427 1407 5 

V901362 14075 

V27430 12600 

V42057 12600 

V901363 1 2600 

Use or disclosure of this infonnation is subject to 

The restrictions on the title page of this document 

Revised 

Cleared 

Cyclic Life 

(flights) 

5623 

5623 

1525 

11600 

11600 

2867 

114 74 

11474 

2452 

1 2160 

12160 

1 21 60 

12160 

2074 

10480 

10480 

January 2015 
ROLLS-ROYCE pic 

ALERT SERVICE BULLETIN 

Mk.522 Number 72-A412 

Circulation B 

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

COMPONENTS THAT HAVE OPERATED BEYOND THEIR SUPPORTABLE LIVES 

Table 1 -Revised Group A Component Lives <cont.) 

Present cleared 

cyclic life 

(flights) Ref 

Time Limits 

Item Part No. Chapter 5-10-01 

of Overhaul 

Manual dated Feb 

2013 

6th stage V27433 12600 

V42059 12600 

V901364 12600 

7th stage (front) V28382 2800 

V42062 2800 

V28501 16200 

V901365 16200 

7th stage (rear) V28383 2800 

V42061 2800 

V28502 16200 

V901366 16200 

7th stage sub unit V35813 16200 

(comprising V28501 

front & V28502 rear 

discs) 

7th stage sub unit V901359 16200 

(comprising V901365 

front & V901366 rear 

discs) 

Rotating Shrouds 

Zero Stage 

January 2015 

V24671 5500 

V44045 5500 

V53088 5500 

V110422 5500 

Use or disclosure of this information is subject to 

The restrictions on the title page of this document 

Revised 

Cleared 

Cyclic 

Life 

(flights) 

2074 

1 2000 

12000 

702 

702 

7673 

7673 

702 

702 

7673 

7673 

7673 

7673 

5500 

5500 

5500 

5500 

72-A412 

Page 3 
ROLLS-ROYCE pic 

ALERT SERVICE BULLETIN 

Mk.522 Number 72-A412 

Circulation B 

ENGINE REVISED COMPONENT GROUP A LIVES AND REMOVAL FROM SERVICE OF 

COMPONENTS THAT HAVE OPERATED BEYOND THEIR SUPPORTABLE LIVES 

Table 1 - Revised Group A Component Lives (cont.) 

Item 

6th stage 

Turbine Mainshaft 

Turbine Disc 

Combustion 

Chamber 

72-A412 

Page 4 

Casing 

Present cleared 

cyclic Life 

(flights) Ref 

Time Limits 

Part No. Chapter 5-10-01 

of Overhaul 

Manual dated Feb 

2013 

V26812 3900 

V27891 Unrestricted 

V44051 Unrestricted 

V48723 Unrestricted 

V107239 Unrestricted 

V109011 Unrestricted 

V110430 Unrestricted 

V29405 20000 

V44068 20000 

V42839 ND 20000 

V36910 5000 

V36911 5000 

V36912 5000 

V27504 14690 

V56348 14690 

V22713 15000 

V44477 15000 

V45669 15000 

V45694 15000 

Use or disclosure of this information is subject to 

The restrictions on the title page of this document 

Revised Cleared 

Cyclic Life 

(flights) 

3900 

Unrestricted 

Unrestricted 

Unrestricted 

Unrestricted 

Unrestricted 

Unrestricted 

5014 

5014 

5014 

1254 

1254 

1254 

5998 

5998 

5396 

5396 

5396 

5396 

January 2015 
ROLLS-ROYCE pic 

ALERT SERVICE BULLETIN 

Mk.522 Number 72-A412 

Circulation B 

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

COMPONENTS THAT HAVE OPERATED BEYOND THEIR SUPPORTABLE 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 in Table 1 of this Bulletin 

are published in: 

(a) Viper Mk.522 Overhaul Manual, Chapter 5-10, Table 1 

(b) Viper Mk.522 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 

Table1. 

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 

January 2015 

Use or disclosure of this information is subject to 

The restrictions on the title page of this document 

72-A412 

Page 5 
ROLLS-ROYCE pic 

ALERT SERVICE BULLETIN 

Mk.522 Number 72-A412 

Ci rcu Lati on B 

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

COMPONENTS THAT HAVE OPERATED BEYOND THEIR SUPPORTABLE LIVES 

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.522 Engine Overhaul Manual 

Viper Mk.522 Engine Maintenance Manual 

K. Publications Affected 

Viper Mk.522 Engine Overhaul Manual, Chapter 5-10, Table 1 

Viper Mk.522 Engine Maintenance Manual, Chapter 5-10-00, 

Table 1 

2. ACCOMPLISHMENT INSTRUCTIONS 

A. Installed and Uninstalled Engines 

72-A412 

Page 6 

(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. 

Use or disclosure of this infonnation is subject to 

The restrictions on the title page of this document 

January 2015 
ROLLS-ROYCE pic 

ALERT SERVICE BULLETIN 

Mk.522 Number 72-A412 

Circulation B 

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

COMPONENTS THAT HAVE OPERATED BEYOND THEIR SUPPORTABLE LIVES 

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 operation for Group A life expiry in 

accordance with SB72-A412.'' 

January 2015 

(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 limit of each Group A component 

as detailed in Table 1 of this bulletin, and 

record compliance with SB72-A412. 

(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 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-

A412. 

Use or disclosure of this information is subject to 

The restrictions on the title page of this document 

72-A412 

Page 7 
ROLLS-ROYCE pic 

ALERT SERVICE BULLETIN 

Mk.SZZ Number 72-A412 

Circulation B 

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

COMPONENTS THAT HAVE OPERATED BEYOND THEIR SUPPORTABLE LIVES 

(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-A412". 

(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-A412. 

(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-A412". 

(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-

A412. 

D. Reporting Compliance 

72-A412 

Page 8 

Compliance with this Service Bulletin is to be reported to 

Rolls-Royce plc for each component. 

Use or disclosure of this infonnation is subject to 

The restrictions on the title page of this document 

January 2015