40220 Tarnos - France

Tel +33 (0)5 59 74 40 00 

Fax +33 (0)5 59 74 45 15

MANDATORY SERVICE BULLETIN

Applicable variants: ARRIUS 2 F 

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

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

according to the conditions of application.

JUNE 2013

If the resources (parts, tools, documentation, etc.) are available any earlier, the SB may be 

applied prior to the effectivity date.

Version: B

Reason for update: 

- Update of the list of lubrication devices concerned.

- Change of date by which the SB must be applied.

- Update of the “Identification” paragraph

- Change of supply conditions.

 SB_319_79_4835_EN - B <February 12, 2015> - 1 / 15
MANDATORY SERVICE BULLETIN

Applicable variants: ARRIUS 2 F § 1 - 1/1

1. GENERAL

1.1. Purpose

WARNING: 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).

1.2. Reason

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

1.3. Description

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).

1.4. 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.

1.5. Compliance conditions

The application conditions of this Mandatory SB are defined respectively in:

- Chapter §2 regarding application at the operator’s site or by a qualified Maintenance Center for level 1, 2.

- Chapter §3 regarding application by a qualified Maintenance Center for level 3.

- Chapter §4 regarding application at a TURBOMECA-approved Repair Center.

1.6. Update history

Not applicable.

END of section §1

“General”

 SB_319_79_4835_EN - B <February 12, 2015> - 2 / 15
MANDATORY SERVICE BULLETIN

Applicable variants: ARRIUS 2 F § 2 - 1/5

2. APPLICATION AT THE OPERATOR’S SITE OR BY A QUALIFIED MAINTENANCE CENTER 

FOR LEVEL 1, 2

WARNING: FAILURE TO APPLY THIS MANDATORY SERVICE BULLETIN MAY LEAD TO AN UNCOMMANDED INFLIGHT ENGINE SHUT-DOWN WHICH, ON A SINGLE-ENGINE HELICOPTER, LEADS TO AN

EMERGENCY AUTOROTATION LANDING.

2.1. Required actions

Check the tightening of the jet of the ejector according to TI Ref. 319 79 4831 2.

2.2. Effectivity 

ENGINE/VARIANT CODE CONDITIONS OF APPLICATION FOR ENGINES IN

SERVICE

ARRIUS 2F 1-B * see § 2.3.

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 

above. 

Note This Mandatory SB applies to the lubricating devices listed in the table below to which 

SB No. 319 79 4831 (or TI Ref. 319 79 4831 2) has not been applied.

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

100 140M 185M 247 436M

105M 141M 190M 255M 443M

106 142B 191M 266M 445M

107B 146M 195M 278M 451M

109M 147M 198M 292M 467M

112B 156M 202M 304M 477M

112M 159M 204M 330M 479M

114B 164M 207M 334M 483M

124B 178 210M 369M 484M

125M 178M 213M 384M 512M

129M 180 218M 391M 526M

135B 180M 222M 392M 563M

135M 181M 244M 417M

2.3. Conditions of application for engines in service

Application before March 31, 2015.

2.3.1. Implementation

Application of this Mandatory SB may be performed without removing the engine.

Tableau : Liste des N/S des groupes de lubrification concernés

List of S/Ns of concerned lubricating devices 

 SB_319_79_4835_EN - B <February 12, 2015> - 3 / 15
MANDATORY SERVICE BULLETIN

Applicable variants: ARRIUS 2 F § 2 - 2/5

2.3.2. Operating instructions

WARNING: FAILURE TO APPLY THIS MANDATORY SERVICE BULLETIN MAY LEAD TO AN UNCOMMANDED INFLIGHT ENGINE SHUT-DOWN WHICH, ON A SINGLE-ENGINE HELICOPTER, LEADS TO AN

EMERGENCY AUTOROTATION LANDING.

Refer to TI Ref. 319 79 4831 2.

2.3.3. Reconditioning and checks

Refer to TI Ref. 319 79 4831 2.

2.3.4. Identification

2.3.4.1. If replacing the lubricating device

- Record the lubricating device replacement in section "C" of the engine log book. 

- Record the application of this Mandatory SB No. 319 79 4835 in section "E" of the "current" engine 

log book or in section "A" of the "unique" engine log book. 

- Return the technical report of TI Ref. 319 79 4831 2.

- Notify TURBOMECA that the lubricating device has been replaced by returning the fully completed 

compliance certificate (Appendix 2.1 of this Mandatory SB). 

2.3.4.2. If replacing the equipped ejector assembly

- Record the application of this Mandatory SB No. 319 79 4835 in section “E” of the engine log book 

- Return the technical report of TI Ref. 319 79 4831 2.

- Notify TURBOMECA that Mandatory SB No. 319 79 4835 has been applied by returning the fully 

completed compliance certificate (Appendix 2.2. of this Mandatory SB).

2.3.5. Routine maintenance

No modification to the routine maintenance.

2.4. Material information

2.4.1. Basic information

Not applicable.

2.4.2. List of parts

Refer to TI Ref. 319 79 4831 2.

2.4.3. Supply conditions

Order supplies as needed from:

your local TURBOMECA Support Center

or

TURBOMECA

Direction Support et Service

Département Commercial

40220 TARNOS - France

Fax No. +33 (0) 5 59 74 45 11

2.5. Manpower

- Personnel: 1 TURBOMECA-qualified technician

- Time required: 1 man-hour.

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MANDATORY SERVICE BULLETIN

Applicable variants: ARRIUS 2 F § 2 - 3/5

2.6. Tooling and/or products

Refer to TI Ref. 319 79 4831 2.

2.7. Weight and balance

Not applicable.

2.8. Publication references

Document Engine Reference

Maintenance Manual (MM) ARRIUS 2F X 319 L6 301 2

Spare Parts Catalog (SPC) ARRIUS 2F X 319 L6 700 2

Technical Instruction (TI) ARRIUS 2F X 319 79 4831 2

Service Bulletin (SB) ARRIUS 2F 319 79 4831

 SB_319_79_4835_EN - B <February 12, 2015> - 5 / 15
MANDATORY SERVICE BULLETIN

Applicable variants: ARRIUS 2 F § 2 - 4/5

Objet : Attestation de remplacement du groupe de lubrification.

Subject: Compliance certificate for replacement of lubricating device.

Après application des instructions spécifiées dans ce SB Impératif, veuillez compléter la présente 

attestation et la retourner par courrier ou courriel ou fax :

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, BP 25

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

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 / AAAA 

ou/or DD / MMMM / YYYY]

Nom / Print name Fonction / Job title

ANNEXE 2.1 / APPENDIX 2.1

Signature:

 SB_319_79_4835_EN - B <February 12, 2015> - 6 / 15
MANDATORY SERVICE BULLETIN

Applicable variants: ARRIUS 2 F § 2 - 5/5

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

Subject: Mandatory SB No. 319 79 4835 compliance certificate.

Après application des instructions spécifiées dans ce SB Impératif, veuillez compléter la présente 

attestation et la retourner par courrier ou courriel ou fax :

After application of the instructions specified in this Mandatory SB, please complete this certificate and mail or 

email or fax to:

TURBOMECA, Equipe Administration Base installée / Fleet Data Administrator Team, BP 25

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

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 2.2 / APPENDIX 2.2

Signature:

“Application at the operator’s site or by a qualified Maintenance Center for level 1, 2”

END of section §2

 SB_319_79_4835_EN - B <February 12, 2015> - 7 / 15
MANDATORY SERVICE BULLETIN

Applicable variants: ARRIUS 2 F § 3 - 1/1

3. APPLICATION BY A QUALIFIED MAINTENANCE CENTER FOR LEVEL 3

No specific instructions regarding application at this maintenance level. Refer to Chapter 2.

END of section §3

“Application by a qualified Maintenance Center for level 3”

 SB_319_79_4835_EN - B <February 12, 2015> - 8 / 15
MANDATORY SERVICE BULLETIN

Applicable variants: ARRIUS 2 F § 4 - 1/7

4. APPLICATION AT A TURBOMECA-APPROVED REPAIR CENTER

4.1. Required actions

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

4.2. Effectivity and compliance times

ENGINE/VARIANT CODE CONDITIONS OF APPLICATION FOR ENGINES IN 

SERVICE

ARRIUS 2F 1-B Application prior to delivery (* see § 4.3.)

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 

above.

Note This Mandatory SB applies to the lubricating devices listed in the table below to which 

SB No.319 79 4831 (or TI Ref. 319 79 4831 2) has not been applied. 

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

100 140M 185M 247 436M

105M 141M 190M 255M 443M

106 142B 191M 266M 445M

107B 146M 195M 278M 451M

109M 147M 198M 292M 467M

112B 156M 202M 304M 477M

112M 159M 204M 330M 479M

114B 164M 207M 334M 483M

124B 178 210M 369M 484M

125M 178M 213M 384M 512M

129M 180 218M 391M 526M

135B 180M 222M 392M 563M

135M 181M 244M 417M

4.3. Conditions of application for engines in service

Application before delivery.

4.4. Accomplishment Instructions

4.4.1. Implementation

Not applicable.

Tableau : Liste des N/S des groupes de lubrification concernés

List of S/Ns of concerned lubricating devices 

 SB_319_79_4835_EN - B <February 12, 2015> - 9 / 15
MANDATORY SERVICE BULLETIN

Applicable variants: ARRIUS 2 F § 4 - 2/7

4.4.2. Operating instructions 

4.4.2.1. Remove the equipped ejector assembly: refer to the ARRIUS 2F Overhaul Manual and Component 

Maintenance Manual

4.4.2.2. Perform a visual inspection of the equipped ejector assembly (1) (Figure 4.1): 

4.4.2.2.1. 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.

4.4.2.2.1.1. If the jet is present and not fully unscrewed:

- Measure the space X between the jet (2) and the ejector support (3).

- Record dimension X:

4.4.2.2.1.2. If jet (2) is unscrewed, make sure there is glue on the threading.

4.4.2.2.2. Check the condition of the equipped ejector assembly (1) 

- No scratching or deep scoring (discernible by touch)

- No cracks in the ejector housing groove.

4.4.2.2.3. 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.

4.4.2.2.4. Record the values from the visual inspections on the check result sheet (Appendix 4.1)

1

2 2 3

X = mm

FIGURE 4.1

Dimension 

X

 SB_319_79_4835_EN - B <February 12, 2015> - 10 / 15
MANDATORY SERVICE BULLETIN

Applicable variants: ARRIUS 2 F § 4 - 3/7

4.4.2.3. Check the tightening torque of the jet (2) of the equipped ejector assembly (1) (Figure 4.2). 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:

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

4.4.2.3.2. Position the test clamping sleeve (4) on the nozzle (2) of the equipped ejector assembly (1).

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

4.4.2.3.4. 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: 

4.4.2.3.4.1. 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. 

4.4.2.3.4.2. If there is no rotation of the jet (2) (no distortion of reference mark for jet (2) / ejector 

support (3)), bonding is deemed compliant. 

4.4.2.3.5. Record the part number / manufacturing order of the ejector assembly (1) (Figure 4.3) (if 

present) on the Check Result Sheet (Appendix 4.1).

Trait de repère

Reference mark

FIGURE 4.2

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 - B <February 12, 2015> - 11 / 15
MANDATORY SERVICE BULLETIN

Applicable variants: ARRIUS 2 F § 4 - 4/7

4.4.2.4. Actions after checks: 

4.4.2.4.1. If the visual inspection of ejector assembly is out of tolerance, discard and replace ejector 

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

4.4.2.4.1.1. If the visual inspection of the equipped ejector assembly housing is out of tolerance:

refer to the ARRIUS 2F Component Maintenance Manual. 

4.4.2.4.1.2. 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. 

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

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

4.4.3. Reconditioning and checks

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

4.4.4. Identification

- Record the application of Mandatory SB No. 319 79 4835 on the component log card (FM).

- Notify TURBOMECA that Mandatory SB No. 319 79 4835 has been applied by returning the fully 

completed compliance certificate (Appendix 4.2. of this Mandatory SB).

- Return the check result certificate (Appendix 4.1 of this Mandatory SB).

4.4.5. Routine maintenance

No modification to the routine maintenance.

4.5. Material information

4.5.1. Basic information

The parts list provided below and required for the application of this Mandatory SB is for one engine.

4.5.2. List of parts

New Part 

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

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

FIGURE 4.3

Référence

Part Number Ordre de fabrication

Manufacturing order

 SB_319_79_4835_EN - B <February 12, 2015> - 12 / 15
MANDATORY SERVICE BULLETIN

Applicable variants: ARRIUS 2 F § 4 - 5/7

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.

4.5.3. Supply conditions

Order supplies as needed from:

your local TURBOMECA Support Center

or

TURBOMECA

Direction Support et Service

Département Commercial

40220 TARNOS - France

Fax No. +33 (0) 5 59 74 45 11

4.6. Manpower

- Personnel of approved Repair Center.

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

4.7. Tooling and/or products

- 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).

4.8. Weight and balance

Not applicable.

4.9. Publication references

Document Engine Reference

Component Maintenance Manual (CMM) ARRIUS 2F 79-24-05

Overhaul Manual (MR) ARRIUS 2F X 319 L6 301 2

Illustrated Parts Catalog (IPC) ARRIUS 2F X 319 L6 700 2

 SB_319_79_4835_EN - B <February 12, 2015> - 13 / 15
MANDATORY SERVICE BULLETIN

Applicable variants: ARRIUS 2 F § 4 - 6/7

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 4.1 / APPENDIX 4.1

Signature :

Objet : Résultat du contrôle.

Subject: Check result.

Après application des instructions spécifiées dans ce SB Impératif, veuillez compléter la présente 

attestation et la retourner par courrier ou courriel ou fax :

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, BP 25

40220 TARNOS - France

Fax n° / No. +33 (0) 5 59 74 46 95 - Email: fleetdata@turbomeca.fr

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 - B <February 12, 2015> - 14 / 15
MANDATORY SERVICE BULLETIN

Applicable variants: ARRIUS 2 F § 4 - 7/7

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 :

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, BP 25

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

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 4.2 / APPENDIX 4.2

Signature :

END of section §4

"Application by a TURBOMECA-approved Repair Center"

 SB_319_79_4835_EN - B <February 12, 2015> - 15 / 15