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

ARRIEL 1 No. 292 73 0817

Subject: Fuel Control Unit (FCU). Inspection of plug installed on 3-way union.

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



## Version: C

Reason for update: Additional information. Version B of this Service Bulletin has never been distributed.



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# MANDATORY SERVICE BULLETIN

1. Compliance

Service Bulletin effectivity date * JANUARY 2008

* Date by which the conditions of application fo r the Service Bulletin must systematically be

complied with. This date corresponds to when sufficient resources required to incorporate the Service Bulletin (parts, tools, documentation, etc.) will be available. If these resources are available any earlier, the Service Bulletin may, as an exception, be incorporated prior to the effectivity date.

CAUTION: FAILURE TO INCORPORATE THIS MA NDATORY SERVICE BULLETIN MAY LEAD TO AN UNCOMMANDED IN-FLIGHT SHUTDOWN.


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

Validity Code
ARRIEL 1 E2 engines ARRIEL 1 S - 1 S1 engines 1-A

Conditions of application for engines in service (1) Application at the operator's site or at a TURBOMECA-approved Service Station Within "100" operating hours (starting when the mandatory Service Bulletin is received). (2) Application at a TURBOMECA-approved Repair Center Before delivery. 

### B. Purpose To prevent a high pressure leak (i.e. at the fuel pump outlet) that could lead to an in-flight flame-out and/or possibly a fire. 

### C. Description (see Figure) This procedure consists of checking the conformity of the plug installed on the FCU 3-way union, and of inspecting its apparent tightening torque which must be between 1.3 and 1.5 daN.m. 

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

### E. Manpower (1) At the operator's site or at a TURBOMECA-approved Service Station (a) Personnel : 1 mechanic. (b) Time required : 0.5 man-hour. (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.



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# MANDATORY SERVICE BULLETIN

G. Tooling (1) At the operator's site or at a TURBOMECA-approved Service Station (a) Mechanic's standard tooling. (b) Torque wrench to inspect torque. (2) At a TURBOMECA-approved Repair Center Refer to the ARRIEL 1 Repair Manual. 

### H. Weight and balance Not applicable.


### I. References (1) ARRIEL 1 E2 Maintenance Manual........................................... Ref. X 292 M3 452 2. (2) ARRIEL 1 S Maintenance Manual............................................. Ref. X 292 F9 452 2. (3) ARRIEL 1 S1 Maintenance Manual........................................... Ref. X 292 H4 452 2. (4) ARRIEL 1 Repair Manual .......................................................... Ref. X 292 87 500 2. 

### J. Other publications concerned (1) ARRIEL 1 E2 Spare Parts Catalogue........................................ Ref. X 292 M3 702 2. (2) ARRIEL 1 S Spare Parts Catalogue.......................................... Ref. X 292 F9 702 2. (3) ARRIEL 1 S1 Spare Parts Catalogue........................................ Ref. X 292 H4 702 2. (4) ARRIEL 1 E2 Illustrated Parts Catalogue.................................. Ref. X 292 M3 602 2. (5) ARRIEL 1 S Illustrated Parts Catalogue.................................... Ref. X 292 F9 602 2. (6) ARRIEL 1 S1 Illustrated Parts Catalogue.................................. Ref. X 292 H4 602 2.



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# MANDATORY SERVICE BULLETIN

2. Instructions to be incorporated
A. Implementation This inspection may be performed without removing the engine from the helicopter. This procedure can be performed: (1) By checking plug and replacing it if necessary. (2) By inspecting apparent tightening torque. 

### B. Operating instructions (1) Identify plug installed on 3-way union (see Figure). Note: The compliant plug can be equipped with different types of circlips. (2) If plug is compliant (P/N 9 932 30 706 0) (a) Inspect tightening torque with torque wrench adjusted to between 1.3 and 1.5 daN.m. Torque to correct value if necessary. (b) Notify TURBOMECA that plug tightening is compliant by returning the fully completed compliance certificate (Appendix 1 of this mandatory Service Bulletin) (3) If plug is not compliant Notify TURBOMECA that plug is not compliant by returning the fully completed compliance certificate (Appendix 1 of this mandatory Service Bulletin). Upon receipt of compliant plug sent by TURBOMECA: (a) Remove non-compliant plug from 3-way union and discard. (b) Install compliant plug (P/N 9 932 30 706 0) on 3-way union. (c) Tighten plug to apparent torque between 1.3 and 1.5 daN.m. 

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


### D. Identification (1) Plug is compliant (a) Complete the following section in the current or unique engine log book:

- Section "E": Record the incorporation of mandatory Service Bulletin No. 292 73 0817. (b) Update the FCU log card by recording the incorporation of this mandatory Service Bulletin. (2) Plug is not compliant (a) Complete the following section in the current or unique engine log book:

- Section "E": Record the replacement of the non-compliant plug. (b) Update the log card of the modified FCU. (c) Notify TURBOMECA that the non-compliant plug has been replaced by returning the fully completed compliance certificate (Appendix 2 of this mandatory Service Bulletin).


### E. Routine maintenance Not applicable.



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# MANDATORY SERVICE BULLETIN

3. Material information

A. Basic information The parts list (provided below) required for the incorporation of this mandatory Service Bulletin is for one engine. 

### B. List of parts

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

9 932 30 706 0 A 1 Sealing plug (73-21-00-02-010) *

* Prices available upon request.

Key A - Part required for the incorporation of this mandatory Service Bulletin. C - Deleted part.


### C. Supply conditions Supply of parts will be managed by: TURBOMECA DSO/RP NORIA 40220 TARNOS - France Fax No. +33 (0) 5 59 74 45 72. Noria Team at Sydney for Australasia Phone : + 61 2 9796 6654 Fax : + 61 2 9796 6624.
Noria Team at Dallas for the Americas Phone : + 1 972 606 76 15 Fax : + 1 972 606 76 68.



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# MANDATORY SERVICE BULLETIN

73-21-00-02-010



### FIGURE / FIGURE A Bouchon conforme Compliant plug

Détail A / Detail A Variantes existantes / Existing variants Bouchon non-conforme (exemple) Non-compliant plug (example) Pour information (Régulateur de carburant ARRIEL 1 E2) For information (ARRIEL 1 E2 FCU)



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# MANDATORY SERVICE BULLETIN

Objet : Attestation de contrôle du bouchon. Subject: Compliance certific ate for checking of plug.

Important / Important notice: Après application de ce Service Bu lletin impératif, veuillez compléte r la présente attestation et la retourner par courrier ou fax à : After incorporating the instructions in this mandatory Se rvice Bulletin, please complete this certificate and mail or fax it to:

For Africa, Europe, Middle East

TURBOMECA Tarnos

DSO/RP NORIA

40220 TARNOS – France Fax n° + 33 (0)59 74 45 72 For the Australasia Noria Team Sydney 115 Wackett St, Bankstown Airport

Bankstown, NSW 220 - Australia Fax n° + 61 2 9796 6624 For the Americas Noria Team Dallas 2709 Forum Drive Grand Prairie, TX 75052 – USA Fax n° + 1 972 606 76 68

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 Régulateur carburant contrôlé Inspected FCU

* 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)

Résultat du contrôle (cocher la case correspondante) Inspection result : tick the corresponding box

Bouchon à remplacer Plug to be replaced Couple de serrage contrôlé Tightening torque inspected

Oui Yes Non No Conforme Compliant Non-conforme Not compliant
Opération effectuée par : Work performed by:

............................................................................................................................... ..................................................
Je certifie que le régulateur identifié ci-dessus a été contrôlé selon les directives du Service Bulletin impératif en objet. I certify that the above-mentioned FCU has been inspected ac cording to the directives given in this mandatory Service Bulletin. Date Nom / Print name Fonction / Job title

............................................................................................................................... ..................................................

Signature:



### ANNEXE 1 / APPENDIX 1



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# MANDATORY SERVICE BULLETIN

Objet : Attestation de remplacem ent du bouchon non conforme. Subject: Compliance certificate for the replacement of a non-compliant plug

. Important / Important notice: Après application de ce Service Bu lletin impératif, veuillez compléte r la présente attestation et la retourner par courrier ou fax à : After incorporating the instructions in this mandatory Se rvice Bulletin, please complete this certificate and mail or fax it to:

For Africa, Europe, Middle East

TURBOMECA Tarnos

DSO/RP NORIA

40220 TARNOS – France Fax n° + 33 (0)59 74 45 72 For the Australasia Noria Team Sydney 115 Wackett St, Bankstown Airport

Bankstown, NSW 220 - Australia Fax n° + 61 2 9796 6624 For the Americas Noria Team Dallas 2709 Forum Drive Grand Prairie, TX 75052 – USA Fax n° + 1 972 606 76 68

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 Régulateur carburant modifié Modified FCU Bouchon déposé Removed plug Bouchon posé Installed plug

* 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 régulateur identifié ci-dessus a ét é installé selon les directives du Service Bulletin impératif en objet. I certify that the above-mentioned FCU has been installed ac cording to the directives given in this mandatory Service Bulletin. Date Nom / Print name Fonction / Job title

............................................................................................................................... ..................................................

Signature:



### ANNEXE 2 / APPENDIX 2



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