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# ALERTSERVICEBULLETIN 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

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# ALERTSERVICE 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 11475 V901360 114 7 5 V27424 14075 V41180 14075 V901361 14075 V27427 14075 V901362 14075 V27430 12600 V42057 12600 V901363 12600

Useordisclosureofthis infonnationissubjectto The restrictionsonthetitlepageofthisdocument Revised Cleared Cyclic Life (flights)

5623 5623 1525 11600 11600 2867 11474 11474 2452 12160 12160 121 60 12160 2074 10480 10480

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# ALERTSERVICEBULLETIN 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

Useordisclosureofthis informationissubjectto The restrictionsonthetitlepageofthisdocument Revised Cleared Cyclic Life (flights)

2074 12000 12000 702 702 7673 7673 702 702 7673 7673 7673

7673

5500 5500 5500 5500

72-A412

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# ALERTSERVICE 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

Useordisclosureofthisinformationissubjectto The restrictionsonthetitle pageofthisdocument Revised Cleared Cyclic Life (flights)

3900 Unrestricted Unrestricted Unrestricted Unrestricted Unrestricted Unrestricted

5014 5014 5014 1254 1254 1254

5998 5998

5396 5396 5396 5396

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# ALERTSERVICE 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

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# ALERTSERVICE 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
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.
Useordisclosureofthis infonnation issubjectto The restrictionsonthetitlepageofthisdocument January 2015ROLLS-ROYCEpic 

# ALERTSERVICEBULLETIN 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.

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# ALERTSERVICEBULLETIN 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.

Useordisclosureofthisinfonnation issubjectto The restrictionsonthetitlepageofthisdocument January 2015