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 79 4835

Subject: Lubrication device. Check of the nozzle bonding on the 

ejector assembly. 

The technical information contained in this document has been approved under the 

Design Organization Approval No. EASA.21J.070

Version: A 

 SB_319_79_4835_EN - A <May 22, 2013> - 1 / 13
MANDATORY SERVICE BULLETIN 

1. Compliance conditions 

CAUTION: FAILURE TO APPLY THIS MANDATORY SERVICE BULLETIN MAY LEAD TO AN 

UNCOMMANDED IN-FLIGHT ENGINE SHUT-DOWN WHICH, ON A SINGLE-ENGINE 

HELICOPTER, LEADS TO AN EMERGENCY AUTOROTATION LANDING. 

A. Mandatory Service Bulletin (SB) effectivity date 

Date on which this Mandatory SB becomes effective and must systematically be complied 

with, according to the conditions of application. 

If these resources are available any earlier, the Mandatory SB may, as an exception, be 

applied prior to the effectivity date. 

JUNE 2013 

or UPON RECEIVING THIS MANDATORY 

SB 

B. Effectivity 

Application of this Mandatory SB is considered mandatory as a result of a technical 

requirement which might affect flight safety of engines in service. It may be done as defined 

by the effectivity code given in the table below.

Effectivity Code 

ARRIUS 2F 1-B 

* The actions and conditions of application are described in paragraph 5. 

Note: This Mandatory SB applies to the lubricating devices listed in Figure 4 to which SB 

No. 319 79 4831 (or IT Ref. 319 79 4831) has not been applied. 

2. Purpose (Figure 1) 

CAUTION: FAILURE TO APPLY THIS MANDATORY SERVICE BULLETIN MAY LEAD TO AN 

UNCOMMANDED IN-FLIGHT ENGINE SHUT-DOWN WHICH, ON A SINGLE-ENGINE 

HELICOPTER, LEADS TO AN EMERGENCY AUTOROTATION LANDING. 

Check, on the fuel system, the effectiveness of the jet bonding on the equipped ejector 

assembly (1). 

3. Reason 

Ensure the effectiveness of the jet bonding on the equipped ejector assembly. 

4. Description (Figure 1) 

This Mandatory SB consists of checking the loosening torque of the jet (2) on the ejector 

support (3) for the lubrication devices concerned (see applicability note). 

5. Required action(s) and compliance time(s) 

A. At the operator's site, at a TURBOMECA-approved Service Center or at a 

TURBOMECA-approved Maintenance Center 

Application upon receiving parts from TURBOMECA, and no later than October 31, 2013.

B. At a TURBOMECA-approved Repair Center 

Application upon return of material to an approved Repair Center no later than October 31, 

2013 and regardless of the reason for return. 

 SB_319_79_4835_EN - A <May 22, 2013> - 2 / 13
MANDATORY SERVICE BULLETIN 

6. Accomplishment Instructions 

A. Implementation 

Application of this Mandatory SB 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 

Apply IT Ref. 319 79 4831 2. 

(2) At a TURBOMECA-approved Repair Center 

Check the loosening torque of jet (2) that is bonded and screwed to ejector support (3). 

B. Operating instructions 

(1) At the operator's site, at a TURBOMECA-approved Service Center or at a 

TURBOMECA-approved Maintenance Center 

(a) Refer to IT Ref. 319 79 4831 2. 

(2) At a TURBOMECA-approved Repair Center 

(a) Remove the equipped ejector assembly: refer to the ARRIUS 2F Overhaul 

Manual and Component Maintenance Manual. 

(b) Perform a visual inspection of the equipped ejector assembly (1) (Figure 1): 

1 Determine if there is any unscrewing of the jet (2) on the ejector support (3) 

by measuring the space between the jet and the holder: 

1.1 If the jet is present and not fully unscrewed: 

- Measure the space X between the jet (2) and the ejector support 

(3). 

- Record value X: 

1.2 If jet (2) is unscrewed, verify that there is glue on the threading. 

2 Check the condition of the equipped ejector assembly (1) 

- No scratching or deep scoring (discernible by touch) 

- No cracks in the ejector housing groove. 

3 Check the condition of the equipped ejector assembly housing (trunk body or 

lubricating device ...) 

- No scratching or deep scoring (discernible by touch) around the areas of 

the seals. 

4 Record the values from the visual inspections on the check result sheet 

(Appendix 1) 

(c) Check the tightening torque of the jet (2) of the equipped ejector assembly (1) 

(Figure 2). Check bonding of jet (2) of equipped ejector assembly (1) with ejector 

support (3) in accordance with Task 70-42-44-360-801 in the CTB as follows: 

1 Mark the position of the jet (2) in relation to the ejector holder (3) using felt-tip 

pen. 

2 Position the test clamping sleeve (4) on the nozzle (2) of the equipped ejector 

assembly (1). 

3 Secure the ejector assembly with the extractor (5). 

X = mm 

 SB_319_79_4835_EN - A <May 22, 2013> - 3 / 13
MANDATORY SERVICE BULLETIN 

4 Using a torque wrench equipped with a test clamping sleeve (4), apply a 

loosening torque of maximum 0.2 N.m. on the nozzle (2) of the ejector 

assembly: 

4.1 If jet (2) rotates [reference mark for jet (2) / ejector support (3) is 

distorted], bonding is deemed non-compliant and it is necessary to 

verify that there is glue on the threading. 

4.2 If there is no rotation of the jet (2) (no distortion of reference mark for jet 

(2) / ejector support (3)), bonding is deemed compliant. 

5 Record the part number / manufacturing order of the equipped ejector 

assembly (1) (Figure 3) (if present) on the Check Result Sheet (Appendix 1). 

(d) Actions after checks: 

- If the visual inspection of the ejector assembly is out of tolerance, discard and 

replace the ejector assembly (1): refer to the ARRIUS 2F Component 

Maintenance Manual. 

- If the visual inspection of the ejector assembly housing is out of tolerance: refer 

to the ARRIUS 2F Component Maintenance Manual. 

- If the torque check is out of tolerance, replace the equipped ejector assembly 

(1): refer to the ARRIUS 2F Component Maintenance Manual. 

Keep the removed equipped ejector assembly (1) in quarantine storage. 

- If the torque check and visual inspection are compliant, reassemble the ejector 

assembly (1): refer to the ARRIUS 2F Component Maintenance Manual. 

C. Reconditioning and checks 

(1) At the operator's site, at a TURBOMECA-approved Service Center or at a 

TURBOMECA-approved Maintenance Center 

Refer to IT Ref. 319 79 4831 2. 

(2) At a TURBOMECA-approved Repair Center 

Refer to the ARRIUS 2F Overhaul Manual and Component Maintenance Manual. 

D. Identification 

(1) At the operator's site, at a TURBOMECA-approved Service Center or at a 

TURBOMECA-approved Maintenance Center 

(a) If replacing the lubricating device: 

1 Section "C”: Record the lubricating device replacement. 

2 Section "E": Record the application of Mandatory SB No. 319 79 4835. 

3 Return the technical report of IT Ref. 319 79 4831 2. 

4 Notify TURBOMECA that the lubricating device has been replaced by 

returning the fully completed compliance certificate (Appendix 2 of this 

Mandatory SB). 

5 Notify TURBOMECA that this Mandatory SB No. 319 79 4835 has been 

applied by returning the fully completed compliance certificate (Appendix 3 of 

this Mandatory SB). 

(b) If replacing the ejector assembly: 

1 Section "E": Record the application of Mandatory SB No. 319 79 4835. 

2 Return the technical report of IT Ref. 319 79 4831 2. 

3 Notify TURBOMECA that the lubricating device has been replaced by 

returning the fully completed compliance certificate (Appendix 3 of this 

Mandatory SB). 

 SB_319_79_4835_EN - A <May 22, 2013> - 4 / 13
MANDATORY SERVICE BULLETIN 

(2) At a TURBOMECA-approved Repair Center 

(a) Section "A": Record the application of Mandatory SB No. 319 79 4835. 

(b) Notify TURBOMECA that this Mandatory SB No. 319 79 4835 has been applied 

by returning the fully completed compliance certificate (Appendix 3 of this 

Mandatory SB). 

(c) Return the check result certificate (Appendix 1 of this Mandatory SB). 

E. Routine maintenance 

No modification to the routine maintenance. 

7. Material information 

A. Basic information 

The parts list provided below and required for the application of this Mandatory 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 

Refer to IT Ref. 319 79 4831 2. 

(2) At a TURBOMECA-approved Repair Center 

New 

Part Number Key Qty Description* / Item Old Part Number Key Qty 

ARRIUS 2F 

0 319 91 744 0 A 1 Ejector assembly 0 319 91 744 0 I 1 

9 794 42 017 0 A 1 O-ring 

9 794 71 018 0 A 2 O-ring 

Key 

A - Part required for the application of this Mandatory SB. 

I - Part that can be modified at the operator's site by a TURBOMECA-qualified technician or at a 

TURBOMECA-approved Repair Center. 

C. Supply conditions 

The supply of parts will be managed by: 

For Africa, Europe, Middle East 

TURBOMECA-Noria 

Team Tarnos 

40220 TARNOS 

France 

Fax : +33 (0) 5 59 74 45 72 

noria-tarnos-arrius@turbomeca.fr 

For Australasia 

TURBOMECA-Noria 

Team Sydney 

115 Wackett St, Bankstown Airport

Bankstown, NSW 2200 - Australia 

Fax : +61 2 9791 6708 

noria-sydney@turbomeca.com.au

For Asia Pacific 

TURBOMECA-Noria 

Team Singapore

63 Loyang Way, 

Singapore 508753 

Fax: +65 6545 4978 

noria.singapore@turbomeca.com.sg

 SB_319_79_4835_EN - A <May 22, 2013> - 5 / 13
MANDATORY SERVICE BULLETIN 

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 - BRESIL 

Fax : +55 21 2679 2794 

noria-rio@turbomeca.com.br

8. Manpower 

A. At the operator's site, at a TURBOMECA-approved Service Center or at a 

TURBOMECA-approved Maintenance Center 

- Personnel: 1 TURBOMECA-qualified technician. 

- Time required: 1 man-hour. 

B. At a TURBOMECA-approved Repair Center 

- Personnel of approved Repair Center. 

- Time determined by the Repair Center as being appropriate for this level of intervention. 

9. Tooling and/or products 

A. At the operator's site, at a TURBOMECA-approved Service Center or at a 

TURBOMECA-approved Maintenance Center 

Refer to IT Ref. 319 79 4831 2. 

B. At a TURBOMECA-approved Repair Center 

Refer to the ARRIUS 2F Overhaul Manual and Component Maintenance Manual. 

Test clamping sleeve P/N 8250750400. 

Extractor P/N 8819365000 or P/N TM3383G001 (alternative). 

10. Weight and balance 

Not applicable. 

11. Publication references 

- ARRIUS 2F Maintenance Manual ........................................................... Ref. X 319 L6 301 2. 

- Technical Instruction (IT)......................................................................... Ref. 319 79 4831 2. 

- ARRIUS 2F Overhaul Manual ................................................................. Ref. X 319 L6 500 2. 

- ARRIUS 2F Component Maintenance Manual........................................ Ref. X 79 24 05 2. 

- ARRIUS 2F Spare Parts Catalog ............................................................ Ref. X 319 L6 700 2. 

- ARRIUS 2F Illustrated Parts Catalog ...................................................... Ref. X 319 L6 600 2. 

- SB ........................................................................................................... Ref. 319 79 4831. 

12. Approval 

The technical information contained in this document is approved under the Design 

Organization Approval No. EASA.21J.070. 

This Mandatory SB is subject to an Airworthiness Directive. 

 SB_319_79_4835_EN - A <May 22, 2013> - 6 / 13
MANDATORY SERVICE BULLETIN 

FIGURE 1 

1 

2 

2 

3 

Cote X 

Dimension X

 SB_319_79_4835_EN - A <May 22, 2013> - 7 / 13
MANDATORY SERVICE BULLETIN 

FIGURE 2 

1 

3 

2 

2 

4 

5 4 

Clé dynamométrique 

Torque wrench

Vue A 

View A 

Trait de repère 

Reference mark 

 SB_319_79_4835_EN - A <May 22, 2013> - 8 / 13
MANDATORY SERVICE BULLETIN 

FIGURE 3 

Référence 

Part Number

Ordre de fabrication 

Manufacturing order

 SB_319_79_4835_EN - A <May 22, 2013> - 9 / 13
MANDATORY SERVICE BULLETIN 

S/N - S/N S/N - S/N

105M 231 

108M 247 

109M 254 

112B 266M 

120 270 

122B 292M 

129M 333M 

134B 443M 

138B 445M 

141M 467M 

142B 479M 

147M 526M 

149B 563M 

210M 

FIGURE 4 

Liste des N/S des groupes de lubrification concernés 

List of S/Ns of concerned lubricating devices 

 SB_319_79_4835_EN - A <May 22, 2013> - 10 / 13
MANDATORY SERVICE BULLETIN 

For Africa, Europe, Middle East 

TURBOMECA-Noria (Team Tarnos) 

Fax : +33 (0) 5 59 74 45 72 

noria-tarnos-arrius@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

Opération effectuée par / Work performed by:

Date [JJ / MMMM (en lettre) / AAAA 

ou/or DD / MMMM (letter) / YYYY] Nom / Print name Fonction / Job title

 

ANNEXE 1 / APPENDIX 1

Signature:

Objet : Résultat du contrôle. 

Subject: Check result. 

Important / Important notice : Après application des instructions spécifiées dans ce SB Impératif, veuillez compléter cette 

attestation de résultat du contrôle et la retourner par courrier ou courriel ou fax à (cf §7.C) : 

After application of the instructions specified in this Mandatory SB, please complete this check result 

certificate and mail or email or fax it to (refer to §73.C):

Type moteur

Type of engine

Numéro de Série du moteur

Engine S/N

Numéro de l'Ordre de Fabrication de l'éjecteur (si présent)

Manufacturing Order No. of the ejector (if present)

Référence du LRU

LRU P/N

Numéro de Série du LRU

LRU S/N

Nombre d'heures du LRU depuis dernière réparation

LRU hour number since last repair

TSN du LRU

LRU TSN 

Contrôle visuel : Dévissage éjecteur constaté, cote X

Visual inspections: Ejector unscrewing noted, dimension X

OK / NOK X = mm 

Etat de l'éjecteur

Ejector condition

OK / NOK 

Etat du logement de l'éjecteur

Ejector housing condition

OK / NOK 

Contrôle du couple de desserrage de l'éjecteur

Check of ejector loosening torque

OK / NOK 

Si dévissage éjecteur ou couple de desserrage NOK : vérification 

de la présence de colle sur la vis de l'éjecteur

If ejector unscrewed or ejector loosening torque NOK:

Check of glue on the ejector screw

OK / NOK 

 SB_319_79_4835_EN - A <May 22, 2013> - 11 / 13
MANDATORY SERVICE BULLETIN 

Objet : Attestation de remplacement du groupe de lubrification.

Subject: Compliance certificate for replacement of lubricating device. 

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 § 7.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 § 7.C):

For Africa, Europe, Middle East 

TURBOMECA-Noria (Team Tarnos) 

Fax : +33 (0) 5 59 74 45 72 

noria-tarnos-arrius@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 

Groupe de 

lubrification 

déposé

Removed lubricating 

device

 

Groupe de 

lubrification posé

Installed lubricating 

device

 

* 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 groupe de lubrification identifié ci-dessus a été installé selon les directives 

de ce SB Impératif.

I certify that the above-mentioned lubricating device has been installed according to the directives given in this 

Mandatory SB. 

Date [JJ / MMMM (en lettre) / AAAA 

ou/or DD / MMMM (letter) / YYYY] Nom / Print name Fonction / Job title

 

ANNEXE 2 / APPENDIX 2

Signature:

 SB_319_79_4835_EN - A <May 22, 2013> - 12 / 13
MANDATORY SERVICE BULLETIN 

Objet : Attestation d’application du SB Impératif n° 319 79 4835.

Subject: Mandatory SB No. 319 79 4835 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 § 7.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 § 7.C):

For Africa, Europe, Middle East 

TURBOMECA-Noria (Team Tarnos) 

Fax : +33 (0) 5 59 74 45 72 

noria-tarnos-arrius@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 

Groupe de 

lubrification 

modifié

Modified lubricating 

device

 

* 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 groupe de lubrification identifié ci-dessus a été modifié selon les directives de ce SB

Impératif. 

I certify that the above-mentioned lubricating device has been modified according to the directives given in this 

Mandatory SB. 

Date [JJ / MMMM / AAAA 

ou/or DD / MMMM / YYYY] Nom / Print name Fonction / Job title

 

ANNEXE 3 / APPENDIX 3

Signature:

 SB_319_79_4835_EN - A <May 22, 2013> - 13 / 13