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

ARRIUS 2 No. 319 75 4810

Subject: Inspection of clearance between the P3 air pipe (first section) and the RH rear half-wall.

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



## Version: B

Reason for update: Additional information.



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# MANDATORY SERVICE BULLETIN

1. Compliance

SB effectivity date * MAY 2008

* Date on which this Mandatory SB becomes effective and must systematically be complied with, according to the conditions of application. This date corresponds to when all resources needed to apply the Mandatory SB (parts, tools, documentation, etc.) will be available. If these resources are available any earlier, the Mandatory SB may, as an exception, be applied prior to the effectivity date. 

### A. Application Application of this Service Bulletin (SB) 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
ARRIUS 2F (pre TF 80) 1-A

Conditions of application for engines in service (1) Application at the operator's site, at a TURBOMECA-approved Service Center or at a TURBOMECA-approved Maintenance Center (a) Perform this inspection within 100 operating hours on all installed PRE TF 80 engines. (b) Perform this inspection when installing a PRE TF 80 engine on a helicopter.
Note: Do not perform this inspection on post TF 80 engines. (2) Application at a TURBOMECA-approved Repair Center Not applicable. 

### B. Purpose To make sure the P3 air pipe (first section) is in perfect condition, its damage could lead to loss of power. 

### C. Description This procedure consists of inspecting the clearance between the P3 air pipe (first section) and the RH rear half-wall. 

### 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) Personnel: 1 mechanic. (b) Time required: 1 man-hour. (2) At a TURBOMECA-approved Repair Center Not applicable.


### F. Material Refer to paragraph 3.



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# MANDATORY SERVICE BULLETIN

G. Tooling (1) At the operator's site, at a TURBOMECA-approved Service Center or at a TURBOMECA-approved Maintenance Center Mechanic's standard tooling. (2) At a TURBOMECA-approved Repair Center Not applicable. 

### H. Weight and balance Not applicable.


### I. References ARRIUS 2F Maintenance Manual ................................................... Ref. X 319 L6 301 2. 

### J. Other publications concerned ARRIUS 2F Spare Parts Catalog.................................................... Ref. X 319 L6 700 2.



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# MANDATORY SERVICE BULLETIN

2. Instructions to be incorporated
A. Implementation This operation does not necessitate 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 Visually inspect P3 air pipe (first section) and RH rear half-wall and perform dimension check. (2) At a TURBOMECA-approved Repair Center Not applicable. 

### B. Operating instructions (1) At the operator's site, at a TURBOMECA-approved Service Center or at a TURBOMECA-approved Maintenance Center (a) Visually inspect P3 air pipe (first section) and RH rear half-wall (see Figure). 1 If pipe is damaged (trace of rubbing between pipe and half-wall): 1.1 Remove and discard P3 air pipe (first section): refer to ARRIUS 2F Maintenance Manual, task 75-29-00-900-801. 1.2 Install a new P3 air pipe (first section): refer to ARRIUS 2F Maintenance Manual, task 75-29-00-900-801. 2 In the event of a drilled half-wall: 2.1 Remove and discard RH rear half-wall: refer to ARRIUS 2F Maintenance Manual, task 71-31-00-900-801. 2.2 Install a new post TF 80 RH rear half-wall: refer to ARRIUS 2F Maintenance Manual, task 71-31-00-900-801. (b) Inspect clearance between P3 air pipe (first section) and RH rear half-wall using feeler gauges. 1 If P3 air pipe (first section) is in contact with RH rear half-wall: 1.1 Remove and discard P3 air pipe (first section): refer to ARRIUS 2F Maintenance Manual, task 75-29-00-900-801. 1.2 Install a new P3 air pipe (first section): refer to ARRIUS 2F Maintenance Manual, task 75-29-00-900-801. 1.3 Remove and discard RH rear half-wall: refer to ARRIUS 2F Maintenance Manual, task 71-31-00-900-801. 1.4 Install a new post TF 80 RH rear half-wall: refer to ARRIUS 2F Maintenance Manual, task 71-31-00-900-801 2 If clearance ≥ 0.5 mm (compliant inspection ) No further inspection of clearance is required. 3 If clearance < 0.5 mm (non-compliant inspection )

CAUTION: DO NOT DISTORT P3 AIR PIPE (FIRST SECTION) DURING THIS OPERATION.

3.1 Inspect clearance between the P3 air pipe (first section) and the RH rear half-wall every 100 hours.

or 3.2 Apply modification TF 80 within 100 hours before next inspection: refer to SB No. 319 71 4080. (2) At a TURBOMECA-approved Repair Center Not applicable.



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# MANDATORY SERVICE BULLETIN

C. Reconditioning and checks (1) At the operator's site, at a TURBOMECA-approved Service Center or at a TURBOMECA-approved Maintenance Center Perform a ground run check: refer to ARRIUS 2F Maintenance Manual, task 71-02-13-280-801. (2) At a TURBOMECA-approved Repair Center Not applicable.


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

- Section "E": record the application of Mandatory SB No. 319 75 4810, version B. (b) Notify TURBOMECA that Mandatory SB No. 319 75 4810, version B, has been applied by returning the fully completed compliance certificate (Appendix of this Mandatory SB). (2) At a TURBOMECA-approved Repair Center Not applicable.


### 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 application of this SB is for one engine. 

### B. List of parts (1) At the operator's site, at a TURBOMECA-approved Service Center or at a TURBOMECA-approved Maintenance Center

New Part Number Key Qty Description Old Part Number Key Qty

0 319 71 918 0 A 1 P3 air pipe

9 794 41 007 5 B 1 Preformed packing

9 945 00 006 0 B 1 Corrujoint

0 319 99 008 0 A 1 RH rear half-wall

Key A - Part incorporated by this inspection. B - Part not incorporated by this inspection, but required to perform it.
(2) At a TURBOMECA-approved Repair Center Not applicable. 

### C. Supply conditions Order supplies as needed from: your local TURBOMECA Support Center

or TURBOMECA Direction Support Ventes Opérateurs Département Commercial 40220 TARNOS France Fax No. +33 (0) 5 59 74 45 11.



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# MANDATORY SERVICE BULLETIN

FIGURE Zone de contrôle Control area



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# MANDATORY SERVICE BULLETIN

Objet : Attestation d’application du SB Impératif n° 319 75 4810. Subject: Mandatory SB No. 319 75 4810 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 : After application of the instructions specified in this Mandatory SB, please complete this certificate and mail or email or fax it to: TURBOMECA Equipe Administration Base installée / Fleet Data Administrator Team Bâtiment 3 – BP 59 40220 TARNOS – France Fax n ° / No. +33 (0) 5 59 74 46 95 Email : fleetdata@turbomeca.fr

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

* 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)

Résultats du contrôle (coc her la case correspondante) Inspection result: tick the corresponding box

Conforme Compliant Non conforme Not compliant Si non conforme, préciser la non conformité If not compliant, describe the non-conformity

Opération effectuée par : Work performed by:

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

Date Nom / Print name Fonction / Job title

Signature :

ANNEXE / APPENDIX



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