40220 Tarnos - France Tel. +33 (0)5 59 74 40 00 - Telex 570 042 - Fax +33 (0)5 59 74 45 15



# MANDATORY SERVICE BULLETIN A LERT

ARRIEL 2 No. A292 72 5166

Subject: Module M03 (gas generator). HP blade dampers. Application of modification TU 166.

The technical information contained in this document has been approved under the Design Organization Approval No. EASA.21J.070.



## Version: A

Reason for update: First Edition.



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# MANDATORY SERVICE BULLETIN ALERT

1. Compliance

Modification effectivity date * APRIL 2009

* Date on which this modification becomes effe ctive and must systematically be complied with,

according to the conditions of application (defined in §A). This date corresponds to when all resources needed to apply the modification (parts, tools, documentation, etc.) will be available. If these resources are available any earlier, the modification may, as an exception, be applied prior to the effectivity date.

CAUTION: FAILURE TO APPLY THIS MANDATORY SB MAY LEAD TO AN UNCOMMANDED INFLIGHT ENGINE SHUT-DOWN. 

### A. Application Application of this Service Bulletin (SB) is considered mandatory as a result of a technical requirement which might affect safety of some flights. It may be done immediately or to accommodate an existing schedule.

Validity Code

ARRIEL 2C2 1-B

Note: For application of modification TU 166 to the other ARRIEL 2 variants, refer to SB No. 292 72 2166 for variants 2C – 2C1 – 2S1, to Mandatory SB No. A292 72 3166 for variants 2B – 2B1 – 2B1A and to Mandatory SB No. A292 72 4166 for variant 2S2.
Conditions of application for engines in service (1) Application at the operator's site or at a TURBOMECA-approved Service Center Before module M03 has logged 650 operating hours after receiving this Mandatory SB or if the HP turbine is replaced.(2) Application at a TURBOMECA-approved Repair Center or at a TURBOMECAapproved Maintenance Center Upon first return, regardless of the reason for return. 

### B. Purpose To improve vibration damping of the HP blades and to limit HP blade axial displacement in relation to disk in case of blade lock rupture or opening. 

### C. Description (see Figure) This modification consists of inserting dampers between the blades and the HP disk. 

### D. Approval The technical information contained in this document has been approved under the Design Organization Approval No. EASA.21J.070. This Mandatory SB is subject to an Airworthiness Directive. 

### E. Manpower (1) At the operator's site, at a TURBOMECA-approved Service Center or at a TURBOMECA-approved Maintenance Center (a) By the operator 1 Personnel: one mechanic. 2 Time required: 12 man-hours (removal/installation of module M03).



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# MANDATORY SERVICE BULLETIN ALERT

(b) By a TURBOMECA-qualified technician 1 Personnel: one TURBOMECA-qualified technician to perform the procedure. 2 Time required: refer to MTI Ref. X 292 M1 308 2. (2) At a TURBOMECA-approved Repair Center (a) Personnel of approved Repair Center. (b) Time determined by the Repair Center as being appropriate for this level of intervention.



### F. Material Refer to paragraph 3. 

### G. Tooling (1) At the operator's site, at a TURBOMECA-approved Service Center or at a TURBOMECA-approved Maintenance Center (a) For the operator

- Mechanic's standard tooling.

- Tooling for removal/installation of module M03. (b) For a TURBOMECA-qualified technician Refer to MTI Ref. X 292 M1 308 2. (2) At a TURBOMECA-approved Repair Center Refer to the relevant ARRIEL 2 Overhaul Manual. 

### H. Weight and balance Not applicable.



### I. References (1) ARRIEL 2C2 Maintenance Manual............................................ Ref. X 292 N6 450 2. (2) Maintenance Technical Instruction (MTI) ................................. Ref. X 292 M1 308 2. (3) Repair Technical Instruction (RTI)............................................. Ref. X 292 M5 392 9. (4) Service Bulletin (SB).................................................................. No. 292 72 2164. (5) Helicopter Maintenance Manual. (6) Helicopter Flight Manual. 

### J. Other publications concerned (1) ARRIEL 2C2 Spare Parts Catalog............................................. Ref. X 292 N6 700 2. (2) ARRIEL 2C2 Illustrated Parts Catalog....................................... Ref. X 292 N6 600 2.



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# MANDATORY SERVICE BULLETIN ALERT

2. Instructions to be incorporated
A. Implementation Application of this modification necessitates removing the engine from the helicopter. (1) At the operator's site, at a TURBOMECA-approved Service Center or at a TURBOMECA-approved Maintenance Center (a) By the operator Replace module M03. (b) By a TURBOMECA-qualified technician Replace HP turbine wheel assembly. (2) At a TURBOMECA-approved Repair Center Modify HP turbine wheel assembly. 

### B. Operating instructions (1) At the operator's site, at a TURBOMECA-approved Service Center or at a TURBOMECA-approved Maintenance Center (a) By the operator 1 Inform your local TURBOMECA Noria representative that the equipment has been identified by returning the fully completed compliance certificate (Appendix 1 of this Mandatory SB). If module M03 has not been modified to TU 166, record the torque and T45 temperature margin values from the last engine health inspections (as many inspections as available) in Appendix 1 of this Mandatory SB. 2 Remove pre TU 166 module M03: refer to Maintenance Manual, task 72-00-43-900-801. 3 Return pre TU 166 module M03, along with its updated log card, to a TURBOMECA-approved Repair Center or to a TURBOMECA-approved Maintenance Center. 4 Install post TU 166 module M03: refer to Maintenance Manual, task 72-00-43-900-801. (b) By a TURBOMECA-qualified technician 1 Remove pre TU 166 HP turbine wheel assembly: refer to MTI Ref. X 292 M1 308 2. 2 Condition and identify package which contains removed HP turbine wheel assembly, with “NORIA TU 166” adhesive tape. Return pre TU 166 HP turbine wheel assembly to a TURBOMECA-approved Repair Center for application of RTI Ref. X 292 M5 392 9. 3 Install post TU 166 HP turbine wheel assembly: refer to MTI Ref. X 292 M1 308 2. 4 If HP turbine replacement operation is performed at operator’s site and if engine health inspection results are available, record torque and T45 margins in compliance certificate given in Appendix 3 of this Mandatory SB. (2) At a TURBOMECA-approved Repair Center Refer to relevant ARRIEL 2 Overhaul Manual and to RTI Ref. X 292 M5 392 9. 

### C. Reconditioning and checks (1) At the operator's site, at a TURBOMECA-approved Service Center or at a TURBOMECA-approved Maintenance Center (a) By the operator 1 Perform a ground run check: refer to Maintenance Manual, task 71-02-13-280-801. 2 Perform a vibration check: refer to Maintenance Manual, task 71-02-10-760-801.



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# MANDATORY SERVICE BULLETIN ALERT

3 Perform an oil pressure check: refer to Maintenance Manual, task 79-00-00-200-801. (b) By a TURBOMECA-qualified technician Refer to MTI Ref. X 292 M1 308 2. (2) At a TURBOMECA-approved Repair Center Refer to the Overhaul Manual.



### D. Identification (1) At the operator's site, at a TURBOMECA-approved Service Center or at a TURBOMECA-approved Maintenance Center (a) By the operator 1 Complete the current or unique engine log book as follows: 1.1 Complete the following sections in the current engine log book:

- Section "B": record the replacement of module M03.

- Section "D": update the availability status.

- Section "E": record the replacement of module M03 and update the availability status.

- Update the log card of the removed module M03 and the log card of the

installed module M03. 1.2 Complete the following sections in the unique engine log book:

- Section "B": record the replacement of module M03.

- Section "E": record the replacement of module M03 and update the availability status.

- Update the log card of the removed module M03 and the log card of the

installed module M03. 2 Notify TURBOMECA that module M03 has been replaced by returning the fully completed compliance certificate (Appendix 2 of this Mandatory SB). (b) By a TURBOMECA-qualified technician 1 Record the application of modification TU 166, by application of MTI Ref. X 292 M1 308 2, on the log card of the modified module M03. 2 Complete the Maintenance Operation Technical Report available on TOOLS website (ENR0037) and return it to TURBOMECA 3 Notify TURBOMECA that modification TU 166 has been applied by returning the fully completed compliance certificate (Appendix 3 of this Mandatory SB), along with a copy of the HP turbine blade distribution sheet (if available in the engine log book). (2) At a TURBOMECA-approved Repair Center (a) In the unique engine log book, record the application of Mandatory SB No. A292 72 5166, referencing modification TU 166, on the log card of the modified module M03. (b) Notify TURBOMECA that modification TU 166 has been applied by returning the fully completed compliance certificate (Appendix 3 of this Mandatory SB).



### E. Routine maintenance Not applicable.



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# MANDATORY SERVICE BULLETIN ALERT

3. Material information

A. Basic information The parts list (provided below) required for the application of this Mandatory SB is for one engine. 

### B. List of parts
Note: When modification TU 166 is applied, modification TU 164 (SB No. 292 72 2164) must be simultaneously applied. (1) At the operator's site, at a TURBOMECA-approved Service Center or at a TURBOMECA-approved Maintenance Center (a) For the operator Post TU 166 module M03. (b) For a TURBOMECA-qualified technician

New Part Number Key Qty Description Price Old Part Number Key Qty

0 292 26 048 0
0 292 26 052 0
7 292 26 052 A
7 292 26 052 B A 1 HP turbine wheel assembly * All P/Ns F 1

* Prices available upon request.

Key A - Part incorporated by this modification. F - Part that can be modified at the manufacturer’s site or at a TURBOMECA-approved Repair Center.

(2) At a TURBOMECA-approved Repair Center

New Part Number Key Qty Description Old Part Number Key Qty

0 292 26 024 0 A 39 Damper

Key A - Part incorporated by this modification.



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# MANDATORY SERVICE BULLETIN ALERT

C. Supply conditions Supply of parts will be managed by:

For Africa, Europe, Middle East
TURBOMECA-Noria Team Tarnos DVO Service NORIA
40220 TARNOS – France Fax:+33 (0) 5 59 74 45 72 noria-tarnos-arriel2@turbomeca.fr For Australasia, Oceania, Japan
TURBOMECA-Noria Team Sydney 115 Wackett St, Bankstown Airport Bankstown, NSW 2200 - Australia
Fax: +61 2 9791 6708 noria-sydney@turbomeca.com.au
For North America
TURBOMECA-Noria Team Dallas 2709 Forum Drive Grand Prairie, TX 75052 – USA
Fax : +1 972 606 76 68 noria-dallas@turbomeca.com For South America
TURBOMECA-Noria Team Rio Rua Capitão Guynemer, 1626 - Xerém CEP : 25250-130 - Duque de Caxias - RJ - Brasil
Fax : +55 21 2679 2794 noria-rio@turbomeca.com.br

For Asia Pacific
TURBOMECA-Noria

Team Singapore 63 Loyang Way, Singapore 508753
Fax : +65 6545 4978 Noria.singapore@turbomeca.com.sg



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# MANDATORY SERVICE BULLETIN ALERT

FIGURE Pale turbine HP HP turbine blade

Disque turbine HP HP turbine disk Amortisseur Damper



## SB_A292_72_5166_EN - A <June 18, 2012> - 8 / 11

# MANDATORY SERVICE BULLETIN ALERT

Objet : Attestation d’identification du matériel - SB Impératif n° A292 72 5166. Subject: Compliance certificate for eq uipment identification - Mandatory SB No. A292 72 5166.
Important / Important notice : A réception de ce SB Impératif, veuillez compléter la présente attestation et la retourner par courrier ou courriel ou fax à (cf §3.C) : Upon receiving this Mandatory SB, please complete this certificate and mail or email or fax it to (refer to § 3.C):
For Africa, Europe, Middle East TURBOMECA-Noria (Team Tarnos) Fax:+33 (0) 5 59 74 45 72 noria-tarnos-arriel2@turbomeca.fr For Australasia, Oceania, Japan TURBOMECA-Noria (Team Sydney) Fax: +61 2 9791 6708 noria-sydney@turbomeca.com.au For Asia Pacific TURBOMECA-Noria

(Team Singapore) Fax : +65 6545 4978 noria.singapore@turbomeca.com.sg

For North America TURBOMECA-Noria (Team Dallas) Fax : +1 972 606 76 68 noria-dallas@turbomeca.com For South America TURBOMECA-Noria (Team Rio) Fax : +55 21 2679 2794 noria-rio@turbomeca.com.br

Information concernant le matériel / Equipment information

Utilisateur Customer N° Appareil Aircraft S/N

N/S - S/N Réf. - P/N TSN * TSO * CSN* CSO*

Moteur Engine

Module M03

Turbine HP à déposer HP turbine to be removed

Modification TU 166 PRE TU 166 POST TU 166

M03 TSN * Marge en couple Torque margin % Marge en T45 T45 margin °C Si PRE TU 166, marge en couple et T45 If PRE TU 166, torque and T45 margin

* TSN = Time Since New (Heures depuis neuf) TSO = Time Since Overhaul (Heures depuis RG) CSN = Cycles Since New (Cycles depuis neuf) CSO = Cycles Since Overhaul (Cycles depuis RG)
Opération effectuée par : Work performed by:

Date [ JJ / MMMM (en lettre) / AAAA or DD / MMMM (letter) / YYYY] Nom / Print name Fonction / Job title

ANNEXE 1 / APPENDIX 1 Signature :



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# MANDATORY SERVICE BULLETIN ALERT

Objet : Attestation de remp lacement du module M03. Subject: Compliance certificate fo r replacement of module M03.

Important / Important notice : Après application des instructions spécifiées dans ce SB Impératif, veuillez compléter la présente attestation et la retourner par courrier ou courriel ou fax à (cf §3.C) : A fter application of the instructions specified in this Mandatory SB, please complete this certificate and mail or email or fax it to (refer to §3.C):

For Africa, Europe, Middle East TURBOMECA-Noria (Team Tarnos) Fax:+33 (0) 5 59 74 45 72 noria-tarnos-arriel2@turbomeca.fr For Australasia, Oceania, Japan TURBOMECA-Noria (Team Sydney) Fax: +61 2 9791 6708 noria-sydney@turbomeca.com.au For Asia Pacific TURBOMECA-Noria

(Team Singapore) Fax : +65 6545 4978 noria.singapore@turbomeca.com.sg

For North America TURBOMECA-Noria (Team Dallas) Fax : +1 972 606 76 68 noria-dallas@turbomeca.com For South America TURBOMECA-Noria (Team Rio) Fax : +55 21 2679 2794 noria-rio@turbomeca.com.br

Information concernant le matériel / Equipment information

Utilisateur Customer N° Appareil Aircraft S/N

N/S - S/N Réf. - P/N TSN * TSO * CSN* CSO*

Moteur Engine

Module M03 déposé Removed module M03

Module M03 posé Installed module M03

* TSN = Time Since New (Heures depuis neuf) TSO = Time Since Overhaul (Heures depuis RG) CSN = Cycles Since New (Cycles depuis neuf) CSO = Cycles Since Overhaul (Cycles depuis RG)
Opération effectuée par : Work performed by:

Je certifie que le module identifié ci-dessus a été in stallé selon les directives de ce SB Impératif. I certify that the above-mentioned module has been inst alled according to the directives given in this Mandatory SB.

Date [ JJ / MMMM (en lettre) / AAAA or DD / MMMM (letter) / YYYY] Nom / Print name Fonction / Job title

ANNEXE 2 / APPENDIX 2 Signature :



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# MANDATORY SERVICE BULLETIN ALERT

Objet : Attestation d’application de la modification TU 166. Subject: Modification TU 166 compliance certificate.
Important / Important notice : Après application des instructions spécifiées dans ce SB Impératif, veuillez compléter la présente attestation et la retourner par courrier ou courriel ou fax à (cf §3.C) : After application of the instructions specified in this Mandatory SB, please complete this certificate and mail or email or fax it to (refer to §3.C):

For Africa, Europe, Middle East TURBOMECA-Noria (Team Tarnos) Fax:+33 (0) 5 59 74 45 72 noria-tarnos-arriel2@turbomeca.fr For Australasia, Oceania, Japan TURBOMECA-Noria (Team Sydney) Fax: +61 2 9791 6708 noria-sydney@turbomeca.com.au For Asia Pacific TURBOMECA-Noria

(Team Singapore) Fax : +65 6545 4978 noria.singapore@turbomeca.com.sg

For North America TURBOMECA-Noria (Team Dallas) Fax : +1 972 606 76 68 noria-dallas@turbomeca.com For South America TURBOMECA-Noria (Team Rio) Fax : +55 21 2679 2794 noria-rio@turbomeca.com.br

Information concernant le matériel / Equipment information

Utilisateur Customer N° Appareil Aircraft S/N
N/S - S/N Réf. - P/N TSN * TSO * CSN* CSO*

Moteur Engine
Module M03 modifié Modified module M03 Turbine HP déposée Removed HP turbine Disque HP HP disk

Pales HP HP blades Fiche de composition de la turbine HP déposée Distribution sheet of removed HP turbine Oui Yes Non No Turbine HP posée Installed HP turbine

* TSN = Time Since New (Heures depuis neuf) TSO = Time Since Overhaul (Heures depuis RG) CSN = Cycles Since New (Cycles depuis neuf) CSO = Cycles Since Overhaul (Cycles depuis RG)
Contrôle Santé Moteur si résultats disponibles Engine power check if results available Marge en couple % Torque margin Marge en T45 °C T45 margin
Cocher si pièce remplacée durant la même intervention Tick if part is replaced during the same intervention Roue d’injection Injection wheel Segments de l’anneau de THP HPT ring segments
Opération effectuée par : Work performed by: Je certifie que le module identifié ci-dessus a été modifié selon les directives de ce SB Impératif. I certify that the above-mentioned module has been modified according to the directives given in this Mandatory SB.
Date [ JJ / MMMM (en lettre) / AAAA or DD / MMMM (letter) / YYYY] Nom / Print name Fonction / Job title

ANNEXE 3 / APPENDIX 3 Signature :



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