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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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 (cocher 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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