Instruction Technique IT_292_72_2850_EN Version A

vibration check of the 41-tooth gear for check on test bench

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Langue principale : Anglais

Traduction de / Translation of IT_292_72_2850 version A

Controle des vibrations du pignon 41 dents pour contrôle sur banc d'essai

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CE DOCUMENT EST LA PROPRIETE EXCLUSIVE DE LA SOCIETE TURBOMECA, IL NE PEUT ETRE UTILISE SANS SON AUTORISATION.

THIS DOCUMENT IS THE SOLE PROPERTY OF TURBOMECA AND MAY NOT BE USED WITHOUT ITS EXPRESS AUTHORIZATION.

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ARRIEL 2 

TURBOSHAFT ENGINE

TECHNICAL INSTRUCTION

VIBRATION CHECK OF THE 41-TOOTH GEAR 

FOR CHECK ON TEST BENCH 

No. 292 72 2850

Original issue: October 30th, 2013

64511 BORDES CEDEX - FRANCE - Phone: (33) (0) 5.59.12.50.00 - Telex: 560928

Fax: (33) (0) 5.59.53.15.12

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Effectivity: 2B - 2B1 - 2B1A - 2B1B Information

292722850 Page 1

October 30/2013

Components from aircraft involved in accidents, including engines and 

engine parts, are sometimes sold for use on airworthy aircrafts. 

Please be advised that whenever a TURBOMECA engine or engine part 

is subjected to stresses, thermal effects or other damage beyond 

normal operating parameters some adverse change in that part may 

occur. 

Such a change may not be visually detectable and would therefore 

require destructive testing to determine airworthiness. 

Unless you can evaluate stresses, thermal effects or other damage to 

which parts are subjected as the result of an accident and determine 

that the parts still conform with their design standard, you should 

assume that any part that may affect safe operation of the aircraft is 

damaged beyond acceptable limits and must not be re-used. 

All information and data appearing in this technical instruction are the 

exclusive property of TURBOMECA. 

They are made available to the operator of the engine under a restrictive 

licence from TURBOMECA for the sole purpose of enabling safe 

operation and maintenance of the engine. 

Any other use of this information and data is subject to the prior 

agreement of sales terms with TURBOMECA. 

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October 30/2013

All scheduled or unscheduled maintenance procedures carried out 

pursuant to a maintenance document (Maintenance Manual, Technical 

Instruction, Maintenance Technical Instruction) must be recorded in the 

relevant engine log book section(s), on the exchangeable supply log 

card (module) or the log card (accessory) where applicable. 

All modifications made pursuant to a Service Bulletin must be recorded 

in the relevant engine log book section(s), on the exchangeable supply 

log card (module) or the log card (accessory) where applicable. 

Failure to record incorporation of these maintenance procedures or 

modifications could result in unsafe engine usage conditions which 

could compromise flight safety. 

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TURBOMECA

ARRIEL 2 TECHNICAL 

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Effectivity: 2B - 2B1 - 2B1A - 2B1B General

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October 30/2013

VIBRATION CHECK OF THE 41-TOOTH GEAR FOR CHECK ON TEST BENCH

GENERAL

1. Introduction

Apply this technical instruction at a TURBOMECA approved Service Center or a TURBOMECAapproved Maintenance Center. 

It is intended for TURBOMECA-approved technicians carrying out maintenance procedures on 

ARRIEL 1 turboshaft engines and who have followed a Level-1 or 2 maintenance training course. 

It describes the procedure for the vibration check to be done on a test bench to make sure that the 

41-tooth gear of the accessory gearbox (Module 01) meshes correctly. 

This procedure is requested by the Mandatory Service Bulletin No. 292 72 2849. 

These works must be carried out in compliance with the procedure described below. 

2. Reference documents

- Maintenance Manual. 

- Mandatory Service Bulletin No. 292 72 2849. 

3. Purpose of the operation

- Check of mesh frequency order 82 of the 41-tooth gear (of the 41/23 matched gear assembly) of the 

accessory gearbox (Module 01). 

4. Pre-requisites

Not applicable.

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October 30/2013

PAGE INTENTIONALLY LEFT BLANK 

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Effectivity: 2B - 2B1 - 2B1A - 2B1B Tests (engine)

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October 30/2013

VIBRATION CHECK OF THE 41-TOOTH GEAR FOR CHECK ON TEST BENCH

TESTS (ENGINE)

1. Pre-requisites mentioned in the procedure

A. Standard tools 

Description Part Number Quantity

Mechanic’s standard tool kit 1 

Laptop 1 

B. Special tools for B&K 9752-W-001 simplified system 

NOTE: Special tools that are necessary to do the vibration check of the 41-tooth gear 

with the B&K 9752-W-001 simplified system (paragraph 4) when the preliminary 

procedures have been done (paragraph 3). 

Description Part Number Quantity

Z41 vibration check kit for B&K 9752-W-001 test 

bench, including: 

TM6021G001 1 

- Vibration analyzer B&K 2250-H-001 TM5351G201 1 

- USB / micro USB cable B&K AO-1494 TM5351G601 1 

- Accelerometer cable M3 / LEMO 

B&K AO-0701-D-100 - Length 10m 

TM6021G201 1 

- Miniature Deltatron® accelerometer 

B&K 4397-A 

TM5987G201 1 

- Screw HC with flat end DIN 913 (NORELEM 

07165-03X) B&K UA-2095 

TM5987G301 1 

- Neodymium Iron Boron pot magnet 

(ARELEC 0351123) B&K UA-2094 

TM5987G401 1 

- Dual channel tacho coupler B&K WB-3487 TM5988G201 1 

- BNC / LEMO cable B&K AO-0440-D-030 - 

Length 3m 

TM6021G301 1 

- BNC / BNC cable B&K AO-0087-D-030 - 

Length 3m 

N/A 1 

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C. Special tools for PULSE B&K 3560 and B&K LAN-XI systems 

NOTE: Special tools that are necessary to do the vibration check of the 41-tooth gear 

with the PULSE B&K 3560 and B&K LAN-XI systems (paragraph 5) when the 

preliminary procedures have been done (paragraph 3).

D. Consumables 

Description Quantity

"TY-RAP"-type plastic clamp AN 

E. Systematic spares 

Not applicable. 

F. Spares 

Not applicable. 

2. Reference tasks and documents

- Standard practices - General. Refer to Task 70-01-00-940-801-A01 of the Maintenance Manual. 

Description Part Number Quantity

Acquisition system B&K 3560-B or B&K LAN-XI N/A 1 

Miniature Deltatron® accelerometer B&K 4397-A TM5987G201 1 

Screw HC with flat end DIN 913 (NORELEM 

07165-03X) B&K UA-2095 

TM5987G301 1 

Neodymium Iron Boron pot magnet (ARELEC 

0351123) B&K UA-2094 

TM5987G401 1 

Accelerometer cable (connector M3 / 10-32 UNF) 

B&K AO-1381-D-012 - Length 1.2m 

N/A 1 

Adapter (connector 10-32 UNF / BNC) B&K JP-0145 N/A 1 

Adapter (connector BNC / BNC) N/A 1 

BNC / BNC cable B&K AO-0087-D-100 - Length 10m N/A 1 

BNC / BNC cable B&K AO-0087-D-030 - Length 3m N/A 1 

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3. Preliminary procedures

A. Procedure 

(1) Charge the acquisition module batteries for min. 5 hours to avoid any battery charge problem 

during the engine test. 

(2) Stop the normal acceptance scheme, between the end of the "VIBRATIONS" step and the 

beginning of the "LAST INSPECTION" step. 

(3) Remove the three attaching screws and then remove the front engine accelerometer from the 

front accelerometer support. 

(4) Record the following information (* data mandatory to complete the metadata (if system B & K 

9752-W-001) or the trace file (if system B & K PULSE)): 

(a) Bench 

Operator * Site* Bench number *

 

(b) Engine 

Type / Variant / 

Version *

Serial 

Number *

Time since 

new

Time since 

overhaul

Time since 

repair

 

(c) Modules 

Serial 

Number * P/N Time since new *

Time since 

overhaul

Time since 

repair

M 01 * 

M 02 

M 03 

M 04 

M 05 

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4. Vibration check of the 41-tooth gear with the simplified system (B&K 9752-W-001)

A. Installation of the accelerometer, (Refer to Figure 1301) 

(1) If necessary, install the B&K 4397-A accelerometer (TM5987G201) as follows: 

(a) Install the B&K UA-2095 screw HC (TM5987G301) (hexagonal socket head side) in the 

B&K 4397-A accelerometer (TM5987G201) (flat head of the screw HC oriented to the pot 

magnet). 

(b) Install the B&K UA-2094 pot magnet (TM5987G401) on the B&K 4397-A accelerometer 

(TM5987G201) / B&K UA-2095 screw HC (TM5987G301) assembly. 

(c) Connect the B&K 4397-A accelerometer (TM5987G201) with the B&K AO-0701-D-100 

accelerometer cable (TM6021G201). 

(d) Tighten the connector of the B&K AO-0701-D-100 accelerometer cable (TM6021G201) 

moderately on the B&K 4397-A accelerometer (TM5987G201). 

CAUTION: MAKE SURE THAT THE POT MAGNET BASE TOUCHES THE REAR SCREW 

OF THE FRONT ACCELEROMETER SUPPORT AND THE AXIAL 

COMPRESSOR CASING. 

(2) Install the B&K 4397-A accelerometer (TM5987G201) / B&K UA-2094 pot magnet 

(TM5987G401) / B&K AO-0701-D-100 accelerometer cable (TM6021G201) assembly on the 

front accelerometer support. 

CAUTION: MAKE SURE THAT THE CABLE DOES NOT TOUCH THE TEST BENCH 

CONTROLS. 

(3) Route the B&K AO-0701-D-100 accelerometer cable (TM6021G201) to the control room, 

attaching it in different places with "TY-RAP"-type plastic clamps. 

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October 30/2013

41-tooth gear vibration check - Installation of the accelerometer 

Figure 1301 

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TURBOMECA

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Effectivity: 2B - 2B1 - 2B1A - 2B1B Tests (engine)

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B. Connection of the B&K 2250-H-001 vibration analyzer (Refer to Figure 1302) 

(1) Check the charge status of the B&K QB-0061 battery (TM5351P202). 

(2) Connect the N1/NG signal output of the test bench acquisition system to the "Input" of the 

B&K WB-3487 dual channel tacho coupler (TM5988G201) with the B&K AO-0087-D-030 

BNC / BNC cable. 

(3) Connect the “Output” of the B&K WB-3487 dual channel tacho coupler (TM5988G201) to the 

B&K 2250-H-001 vibration analyzer (TM5351G201) with the B&K AO-0440-D-015 

BNC / LEMO cable (TM5988G301), as follows: 

- “Trigger input” terminal for the N1/NG signal. 

(4) Connect the B&K AO-0701-D-100 accelerometer cable (TM6021G201) to the B&K 

2250-H-001 vibration analyzer (TM5351G201), as follows: 

- "Input" terminal for the accelerometer signal. 

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ARRIEL 2 TECHNICAL 

INSTRUCTION

Effectivity: 2B - 2B1 - 2B1A - 2B1B Tests (engine)

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October 30/2013

41-tooth gear vibration check - Connection of the B&K 2250-H-001 vibration analyzer 

Figure 1302

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ARRIEL 2 TECHNICAL 

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Effectivity: 2B - 2B1 - 2B1A - 2B1B Tests (engine)

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C. Vibration measurement 

The vibration record for the 41-tooth gear includes four acquisitions: 

CAUTION: IF T0 IS TOO LOW TO OBEY A START WITH A T9405 OIL TEMPERATURE 

BETWEEN 54°C (129°F) AND 56°C (133°F), THE CONTROL SETPOINT OF THE 

OIL CABINET MUST BE SET TO 70°C (158°F) AND THE FOUR ACQUISITIONS 

MUST BE DONE AGAIN. 

(1) Set the control setpoint of the test bench oil cabinet to 65°C (149°F). 

(2) Operate the B&K 2250-H-001 vibration analyzer (TM5351G201) as follows: 

(a) Press the ON-OFF push-button (1). 

(b) Check the date by clicking on the screen with the stylet on the date / time area at the 

bottom right, update if necessary. 

(c) Select the relevant work card in the menu: 

 Z41-test bench-ARRIEL2 All variants 

(d) Supplement the metadata. 

NOTE: Metadata « Start up Type » : « Cold ». 

Metadata « Comments » : « S/N M01 » + « TSN M01 = XXXX :XX h ». 

(3) Acquisition No. 1 

(a) Read and record the T9405 oil temperature. 

(b) Pulse the push-button (3) of the B&K 2250-H-001 vibration analyzer (TM5351G201) to 

start data acquisition. 

NOTE: Start acquisition 5 seconds before the engine start. 

(c) Start the engine and increase up to ground idle. The following values are recorded: 

 Row vibratory data from the accelerometer. 

 Tachometer signal of the Gas Generator from the test bench acquisition system. 

(d) Pulse the push-button (3) of the B&K 2250-H-001 vibration analyzer (TM5351G201) to 

stop data acquisition. 

(e) Pulse the push-button (4) of the B&K 2250-H-001 vibration analyzer (TM5351G201) to 

store the acquired data. 

(f) Pulse the RESET push-button (2) of the B&K 2250-H-001 vibration analyzer 

(TM5351G201). 

NOTE: The vibration analyzer operates, by default, for approx. five minutes from 

the moment you push the RESET pushbutton. Then it automatically goes 

to the stand-by mode. To reactivate it, press the ON-OFF push-button. 

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(g) Stay at a stabilized rating until you get a T9405 oil temperature of 65°C (149°F). 

(h) Stop the engine. 

(4) Acquisition No. 2 (as soon as possible) 

(a) Operate the B&K 2250-H-001 vibration analyzer (TM5351G201) as follows: 

1 Press the ON-OFF push-button (1), if the tool is in stand-by mode. 

2 Supplement the metadata (Start up Type : « Hot1 »). 

(b) As soon as the T9405 oil temperature is between 54°C (129°F) and 56°C (133°F), pulse 

the push-button (3) of the B&K 2250-H-001 vibration analyzer (TM5351G201) to start 

data acquisition. 

NOTE: Start acquisition 5 seconds before the engine start. 

(c) Start the engine and increase up to ground idle. The following values are recorded: 

 Row vibratory data from the accelerometer. 

 Tachometer signal of the Gas Generator from the test bench acquisition system. 

(d) Pulse the push-button (3) of the B&K 2250-H-001 vibration analyzer (TM5351G201) to 

stop data acquisition. 

(e) Pulse the push-button (4) of the B&K 2250-H-001 vibration analyzer (TM5351G201) to 

store the acquired data. 

(f) Pulse the RESET push-button (2) of the B&K 2250-H-001 vibration analyzer 

(TM5351G201). 

NOTE: The vibration analyzer operates, by default, for approx. five minutes from 

the moment you push the RESET pushbutton. Then it automatically goes 

to the stand-by mode. To reactivate it, press the ON-OFF push-button. 

(g) Stay at a stabilized rating until you get a T9405 oil temperature of 65°C (149°F). 

(h) Stop the engine. 

(5) Acquisition No. 3 (as soon as possible) 

(a) Operate the B&K 2250-H-001 vibration analyzer (TM5351G201) as follows: 

1 Press the ON-OFF push-button (1), if the tool is in stand-by mode. 

2 Supplement the metadata (Start up Type : « Hot2 »). 

(b) As soon as the T9405 oil temperature is between 54°C (129°F) and 56°C (133°F), pulse 

the push-button (3) of the B&K 2250-H-001 vibration analyzer (TM5351G201) to start 

data acquisition. 

NOTE: Start acquisition 5 seconds before the engine start. 

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ARRIEL 2 TECHNICAL 

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(c) Start the engine and increase up to ground idle. The following values are recorded: 

 Row vibratory data from the accelerometer. 

 Tachometer signal of the Gas Generator from the test bench acquisition system. 

(d) Pulse the push-button (3) of the B&K 2250-H-001 vibration analyzer (TM5351G201) to 

stop data acquisition. 

(e) Pulse the push-button (4) of the B&K 2250-H-001 vibration analyzer (TM5351G201) to 

store the acquired data. 

(f) Pulse the RESET push-button (2) of the B&K 2250-H-001 vibration analyzer 

(TM5351G201). 

NOTE: The vibration analyzer operates, by default, for approx. five minutes from 

the moment you push the RESET pushbutton. Then it automatically goes 

to the stand-by mode. To reactivate it, press the ON-OFF push-button. 

(g) Stay at a stabilized rating until you get a T9405 oil temperature of 65°C (149°F). 

(h) Stop the engine. 

(6) Acquisition No. 4 (as soon as possible) 

(a) Operate the B&K 2250-H-001 vibration analyzer (TM5351G201) as follows: 

1 Press the ON-OFF push-button (1), if the tool is in stand-by mode. 

2 Supplement the metadata (Start up Type : « Hot3 »). 

(b) As soon as the T9405 oil temperature is between 54°C (129°F) and 56°C (133°F), pulse 

the push-button (3) of the B&K 2250-H-001 vibration analyzer (TM5351G201) to start 

data acquisition. 

NOTE: Start acquisition 5 seconds before the engine start. 

(c) Start the engine and increase up to ground idle. The following values are recorded: 

 Row vibratory data from the accelerometer. 

 Tachometer signal of the Gas Generator from the test bench acquisition system. 

(d) Pulse the push-button (3) of the B&K 2250-H-001 vibration analyzer (TM5351G201) to 

stop data acquisition. 

(e) Pulse the push-button (4) of the B&K 2250-H-001 vibration analyzer (TM5351G201) to 

store the acquired data. 

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(f) Pulse the RESET push-button (2) of the B&K 2250-H-001 vibration analyzer 

(TM5351G201). 

NOTE: The vibration analyzer operates, by default, for approx. five minutes from 

the moment you push the RESET pushbutton. Then it automatically goes 

to the stand-by mode. To reactivate it, press the ON-OFF push-button. 

(g) Stay at a stabilized rating until you get a T9405 oil temperature of 65°C (149°F). 

(h) Stop the engine. 

(7) Removal of the measuring and acquisition system, if necessary 

(a) Disconnect the B&K 2250-H-001 vibration analyzer (TM5351G201) as follows: 

1 Disconnect and remove the B&K AO-0440-D-030 BNC / LEMO cable 

(TM6021G301) that connects the “Trigger input" terminal of the B&K 2250-H-001 

vibration analyzer (TM5351G201) to the “Output” of the B&K WB-3487 dual channel 

tacho coupler (TM5988G201). 

2 Disconnect and remove the B&K AO-0087-D-030 BNC / BNC cable that connects 

the N1/NG signal output of the test bench acquisition system to the "Input" of the 

B&K WB-3487 dual channel tacho coupler (TM5988G201). 

3 Disconnect the B&K AO-0701-D-100 accelerometer cable (TM6021G201) from the 

“Input” terminal of the B&K 2250-H-001 vibration analyzer (TM5351G201). 

(b) Remove the "TY-RAP"-type plastic clamps that hold the B&K AO-0701-D-100 

accelerometer cable (TM6021G201) to the control room. 

(c) Remove the B&K 4397-A accelerometer (TM5987G201) / B&K UA-2094 pot magnet 

(TM5987G401) / B&K AO-0701-D-100 accelerometer cable (TM6021G201) assembly 

from the front accelerometer support. 

(d) Remove the B&K 4397-A accelerometer (TM5987G201), if necessary, as follows: 

1 Remove the B&K AO-0701-D-100 accelerometer cable (TM6021G201) from the 

B&K 4397-A accelerometer (TM5987G201). 

2 Remove the B&K 4397-A accelerometer (TM5987G201) from the B&K UA-2094 pot 

magnet (TM5987G401) / B&K UA-2095 screw HC (TM5987G301) assembly. 

3 Remove the B&K UA-2095 screw HC (TM5987G301) from the B&K UA-2094 pot 

magnet (TM5987G401). 

(e) Package the removed equipment. 

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(8) Back to initial configuration 

(a) Install the engine accelerometer on the front accelerometer support with the three 

attaching screws. 

(b) Set the control setpoint of the test bench oil cabinet back to its initial value. 

(c) Continue the normal acceptance scheme. 

(9) Data processing 

(a) Energize the laptop and wait until the laptop initialization is completed. 

(b) If necessary, install the BZ 5503 software in the laptop. 

(c) Connect the B&K 2250-H-001 vibration analyzer (TM5351G201) to the laptop with the 

B&K AO-1494 USB / Micro USB cable (TM5351G601). 

(d) Open the BZ -5503 software. Download and rename the data in the laptop. 

(e) Send the four acquisitions (file by file in the following sequence: COLD – HOT1 – HOT2 

and HOT3) to the Brüel&Kjaer server, to the following email address, via email (small 

envelope) BZ 5503 software icon: 

 tm.crex@bkcloudservices.com. 

(f) Close the BZ 5503 software and de-energize the laptop. 

(g) Press the push-button (1) of the B&K 2250-H-001 vibration analyzer (TM5351G201) to 

de-energize it. 

(h) Remove the B&K AO-1494 USB / Micro USB cable (TM5351G601) to disconnect the 

B&K 2250-H-001 vibration analyzer (TM5351G201) from the laptop. 

(i) Package the removed equipment. 

D. Interpretation of the vibration check 

(1) Consider the vibration check results after receiving the measurement report generated by the 

B&K server, following the instructions of Mandatory Service Bulletin N°292 2849. 

o Level 1 : Compliant module 

o Level 2 : Not compliant module 

(2) Complete the vibration record table (refer to Appendix 1) - values are available on page 2 of 

the B&K report (« Indicator’s table »). 

(3) Inform your Noria coordinator that this technical instruction has been performed by returning 

the fully completed compliance certificate (Appendix 2). 

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(4) NORIA coordinators adress 

E. Final steps 

Not applicable. 

For North and Central America

TURBOMECA-Noria

Team Dallas 

2709 Forum Drive 

Grand Prairie, TX 75052 – USA 

Fax : +1 972 606 76 68 

noria-dallas@turbomeca.com

Team Canada

11800, rue Helen-Bristol 

J7N 3G8 QC MIRABEL –Canada 

Fax : +1 450 476 1449

noria-mirabel@turbomeca.ca

Team Mexico 

Montes Urales 505 Piso 3 

Colonia Lomas de Chapultepec 11000 – Mexico DF 

noria-mexico@turbomeca.com.mx

For Africa, Europe, Middle East

TURBOMECA-Noria

Team Tarnos

DVO Service NORIA 

40220 TARNOS – France 

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

noria-tarnos-arriel1@ turbomeca.fr

Team UK 

Concorde Way 

Segensworth North, Fareham 

Hants PO15 5RL - United Kingdom 

noria-tmuk@turbomeca.co.uk

Team Hamburg

Borsteler Chaussee 43 

22453 Hamburg – Germany 

Fax:+49 40 500 216 61 

noria-hamburg@turbomeca.de

For South America

TURBOMECA-Noria

Team Rio 

Rua Capitão Guynemer, 1626 – Xerém 

CEP : 25250-130 - Duque de Caxias - RJ – Brasil 

Fax : +55 21 2679 2794 

noria-rio@turbomeca.com.br

For Australasia, Oceania, Japan

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

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5. Vibration check of the 41-tooth gear with the PULSE B&K 3560 and B&K LAN-XI systems

A. Installation of the accelerometer (Refer to Figure 1303) 

(1) Install the B&K 4397-A accelerometer (TM5987G201), if necessary. 

(a) Install the B&K UA-2095 screw HC (TM5987G301) (hexagonal socket head side) in the 

B&K 4397-A accelerometer (TM5987G201) (flat head of the screw HC oriented to the pot 

magnet). 

(b) Install the B&K UA-2094 pot magnet (TM5987G401) on the B&K 4397-A accelerometer 

(TM5987G201) / B&K UA-2095 screw HC (TM5987G301) assembly. 

(c) Connect the B&K 4397-A accelerometer (TM5987G201) with the B&K AO-1381-D-012 

accelerometer cable. 

(d) Tighten the connector of the B&K AO-1381-D-012 accelerometer cable moderately on the 

B&K 4397-A accelerometer (TM5987G201). 

CAUTION: MAKE SURE THAT THE POT MAGNET BASE TOUCHES THE REAR SCREW OF 

THE FRONT ACCELEROMETER SUPPORT AND THE AXIAL COMPRESSOR 

CASING. 

(2) Install the B&K 4397-A accelerometer (TM5987G201) / B&K UA-2094 pot magnet 

(TM5987G401) / B&K AO-1381-D-012 accelerometer cable assembly on the front 

accelerometer support. 

CAUTION: MAKE SURE THAT THE CABLE DOES NOT TOUCH THE TEST BENCH 

CONTROLS. 

(3) Install the B&K JP-0145 adapter on the B&K AO-1381-D-012 accelerometer cable. 

(4) Install one end of the BNC / BNC adapter in the B&K JP-0145 adapter. 

(5) Install the B&K AO-0087-D-100 BNC / BNC cable in the other end of the BNC / BNC adapter. 

(6) Route the B&K AO-0087-D-100 BNC / BNC cable to the control room, attaching it in different 

places with "TY-RAP"-type plastic clamps. 

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41-tooth gear vibration check - Installation of the accelerometer 

Figure 1303 

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B. Use of the B&K 3560-B acquisition module (Refer to Figure 1304) 

(1) Energize and check the charge status of the B&K 3560-B acquisition module batteries. 

(2) Connect the B&K 3560-B acquisition module to the laptop with the LAN cable. 

(3) Connect the N1/NG signal output of the test bench acquisition system to the B&K 3560-B 

acquisition module with the B&K AO-0087-D-030 BNC / BNC cable as follows: 

- "Ch1" terminal for the N1/NG signal. 

(4) Connect the B&K AO-0087-D-100 BNC / BNC cable to the B&K 3560-B acquisition module as 

follows: 

- "Ch2" terminal for the cable connected to the B&K 4397-A accelerometer (TM5987G201). 

(5) Energize the laptop and wait until the laptop initialization is completed. 

(6) Launch the related PULSE Z41 program. 

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41-tooth gear vibration check - Use of the B&K 3560-B acquisition module 

Figure 1304 

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C. Use of the B&K LAN-XI acquisition module (Refer to Figure 1305) 

(1) Check the charge status of the B&K 2831 battery. 

(2) Assemble the B&K 2831 battery module and the B&K 3050-A-060 acquisition module with the 

4 captive screws. 

(3) Connect the B&K WB-1497 link module to the rear of the B&K 2831 battery and of the B&K 

3050-A-060 acquisition module. 

(4) Connect the B&K 3560-B acquisition module to the laptop with the LAN cable. 

(5) Connect the N1/NG signal output of the test bench acquisition system to the B&K 3560-B 

acquisition module with the B&K AO-0087-D-030 BNC / BNC cable as follows: 

- "Ch1" terminal for the N1/NG signal. 

(6) Connect the B&K AO-0087-D-100 BNC / BNC cable to the B&K 3560-B acquisition module as 

follows: 

- "Ch2" terminal for the cable connected to the B&K 4397-A accelerometer (TM5987G201). 

(7) Energize the B&K 2831 battery. 

(8) Energize the laptop and wait until the laptop initialization is completed. 

(9) Launch the related PULSE Z41 program. 

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41-tooth gear vibration check - Use of the B&K LAN-XI acquisition module 

Figure 1305

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D. Vibration measurement 

The vibration record for the 41-tooth gear includes four acquisitions: 

CAUTION: IF T0 IS TOO LOW TO OBEY A START WITH A T9405 OIL TEMPERATURE 

BETWEEN 54°C (129°F) AND 56°C (133°F), THE CONTROL SETPOINT OF THE 

OIL CABINET MUST BE SET TO 70°C (158°F) AND THE FOUR ACQUISITIONS 

MUST BE DONE AGAIN. 

(1) Set the control setpoint of the test bench oil cabinet to 65°C (149°F). 

(2) Acquisition No. 1 

(a) Read and record the T9405 oil temperature. 

(b) Create an acquisition file in the software; name it as follows: 

 (Engine Family/Version/Variant_Engine S/N_Type of start) 

Example: ARRIEL 2B1_22368_Cold

(c) Start the engine and increase up to ground idle. The following value is recorded: 

 Vibration acceleration level, in rms g, filtered on harmonic 2 (order 82) of the mesh 

frequency of the 41-tooth gear (of the 41/23 matched gear assembly). 

NOTE: The acquisition start and stop are automatic. 

(d) Read and record, in the vibration record table (Appendix 1), the maximum level of 

order 82 of the mesh frequency of the 41-tooth gear in the 4,000-6,000 rpm range. 

(e) Stay at a stabilized rating until you get a T9405 oil temperature of 65°C (149°F). 

(f) Stop the engine. 

(3) Acquisition No. 2 (as soon as possible) 

(a) Read and record the T9405 oil temperature. 

(b) Create an acquisition file in the software; name it as follows: 

 (Engine Family/Version/Variant_Engine S/N_Type of start) 

Example: ARRIEL 2B1_22368_Hot1.

(c) As soon as the T9405 oil temperature is between 54°C (129°F) and 56°C (133°F), start 

the engine and increase up to ground idle. The following value is recorded: 

 Vibration acceleration level, in rms g, filtered on harmonic 2 (order 82) of the mesh 

frequency of the 41-tooth gear (of the 41/23 matched gear assembly). 

NOTE: The acquisition start and stop are automatic. 

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(d) Read and record, in the vibration record table (Appendix 1), the maximum level of 

order 82 of the mesh frequency of the 41-tooth gear in the 4,000-6,000 rpm range. 

(e) Stay at a stabilized rating until you get a T9405 oil temperature of 65°C (149°F). 

(f) Stop the engine. 

(4) Acquisition No. 3 (as soon as possible) 

(a) Read and record the T9405 oil temperature. 

(b) Create an acquisition file in the software; name it as follows: 

 (Engine Family/Version/Variant_Engine S/N_Type of start) 

Example: ARRIEL 2B1_22368_Hot2.

(c) As soon as the T9405 oil temperature is between 54°C (129°F) and 56°C (133°F), start 

the engine and increase up to ground idle. The following value is recorded: 

 Vibration acceleration level, in rms g, filtered on harmonic 2 (order 82) of the mesh 

frequency of the 41-tooth gear (of the 41/23 matched gear assembly). 

NOTE: The acquisition start and stop are automatic. 

(d) Read and record, in the vibration record table (Appendix 1), the maximum level of 

order 82 of the mesh frequency of the 41-tooth gear in the 4,000-6,000 rpm range. 

(e) Stay at a stabilized rating until you get a T9405 oil temperature of 65°C (149°F). 

(f) Stop the engine. 

(5) Acquisition No. 4 (as soon as possible) 

(a) Read and record the T9405 oil temperature. 

(b) Create an acquisition file in the software; name it as follows: 

 (Engine Family/Version/Variant_Engine S/N_Type of start) 

Example: ARRIEL 2B1_22368_Hot3.

(c) As soon as the T9405 oil temperature is between 54°C (129°F) and 56°C (133°F), start 

the engine and increase up to ground idle. The following value is recorded: 

 Vibration acceleration level, in rms g, filtered on harmonic 2 (order 82) of the mesh 

frequency of the 41-tooth gear (of the 41/23 matched gear assembly). 

NOTE: The acquisition start and stop are automatic. 

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(d) Read and record, in the vibration record table (Appendix 1), the maximum level of 

order 82 of the mesh frequency of the 41-tooth gear in the 4,000-6,000 rpm range. 

(e) Stay at a stabilized rating until you get a T9405 oil temperature of 65°C (149°F). 

(f) Stop the engine. 

(6) Removal of the measuring and acquisition system 

(a) De-energize the acquisition module used (B&K 3560-B or B&K LAN-XI). 

(b) Close the PULSE program and de-energize the laptop. 

(c) For the B&K 3560-B or B&K LAN-XI acquisition module, do the following operations: 

 Disconnect the LAN cable that connects the acquisition module to the laptop. 

 Disconnect and remove the B&K AO-0087-D-030 BNC / BNC cable that connects the 

"Ch1" terminal of the B&K 3560-B acquisition module to the N1/NG signal output of 

the test bench acquisition system. 

 Disconnect the B&K AO-0087-D-100 BNC / BNC cable from the "Ch2" terminal of the 

acquisition module. 

(d) For the B&K LAN-XI acquisition module, do the following operations: 

 Disconnect and remove the B&K WB-1497 link module from the rear of the 

B&K 2831 battery and of the B&K 3050-A-060 acquisition module. 

 Unscrew the 4 captive screws and then remove the B&K 2831 battery module and the 

B&K 3050-A-060 acquisition module. 

(e) Remove the "TY-RAP"-type plastic clamps that hold the B&K AO-0087-D-100 

BNC / BNC cable to the control room. 

(f) Disconnect and remove the B&K AO-0087-D-100 BNC / BNC cable from the 

BNC / BNC adapter. 

(g) Disconnect and remove the BNC / BNC adapter from the B&K JP-0145 adapter. 

(h) Disconnect and remove the B&K JP-0145 adapter from the B&K AO-1381-D-012 

accelerometer cable. 

(i) Remove the B&K 4397-A accelerometer (TM5987G201) / B&K UA-2094 pot magnet 

(TM5987G401) / B&K AO-1381-D-012 accelerometer cable assembly from the front 

accelerometer support. 

(j) Remove the B&K 4397-A accelerometer (TM5987G201), if necessary, as follows: 

1 Remove the B&K AO-1381-D-012 accelerometer cable from the B&K 

4397-A accelerometer (TM5987G201). 

2 Remove the B&K 4397-A accelerometer (TM5987G201) from the B&K UA-2094 pot 

magnet (TM5987G401) / B&K UA-2095 screw HC (TM5987G301) assembly. 

3 Remove the B&K UA-2095 screw HC (TM5987G301) from the B&K UA-2094 pot 

magnet (TM5987G401). 

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(k) Package the removed equipment. 

(7) Back to initial configuration 

(a) Install the engine accelerometer on the front accelerometer support with the three 

attaching screws. 

(b) Set the control setpoint of the oil cabinet back to its initial value. 

(c) Continue the normal acceptance scheme. 

E. Interpretation of the vibration check 

(1) The module is considered compliant if the maximum vibration level of the 3 « Hot » records 

(Hot1, Hot2 and Hot3) is strictly less than 13g. 

(2) The recommendations are given in Mandatory SB No. 292 72 2849. 

(3) Complete the vibration record table (refer to Appendix 1). 

(4) Inform your noria coordinator that this technical instruction has been performed by returning 

the fully completed compliance certificate (Appendix 2). 

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(5) Coordinateor NORIA address 

F. Final steps 

Not applicable. 

For North and Central America

TURBOMECA-Noria

Team Dallas 

2709 Forum Drive 

Grand Prairie, TX 75052 – USA 

Fax : +1 972 606 76 68 

noria-dallas@turbomeca.com

Team Canada

11800, rue Helen-Bristol 

J7N 3G8 QC MIRABEL –Canada 

Fax : +1 450 476 1449

noria-mirabel@turbomeca.ca

Team Mexico 

Montes Urales 505 Piso 3 

Colonia Lomas de Chapultepec 11000 – Mexico DF 

noria-mexico@turbomeca.com.mx

For Africa, Europe, Middle East

TURBOMECA-Noria

Team Tarnos

DVO Service NORIA 

40220 TARNOS – France 

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

noria-tarnos-arriel1@ turbomeca.fr

Team UK 

Concorde Way 

Segensworth North, Fareham 

Hants PO15 5RL - United Kingdom 

noria-tmuk@turbomeca.co.uk

Team Hamburg

Borsteler Chaussee 43 

22453 Hamburg – Germany 

Fax:+49 40 500 216 61 

noria-hamburg@turbomeca.de

For South America

TURBOMECA-Noria

Team Rio 

Rua Capitão Guynemer, 1626 – Xerém 

CEP : 25250-130 - Duque de Caxias - RJ – Brasil 

Fax : +55 21 2679 2794 

noria-rio@turbomeca.com.br

For Australasia, Oceania, Japan

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

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APPENDIX 

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APPENDIX 1

VIBRATION RECORD TABLE

Record No. ................ 

Date 

Site 

Bench number 

ARRIEL 2 (Variant) 

S/N of Engine 

S/N of Module 1 

P/N – S/N 

of matched gear assembly 

TSN of M01 

M01 disassembled YES NO 

Type of attachment for the 

Accelerometer ARELEC magnet 

Vibration check per 

IT_292_72_2850 Version ... 

 HH MM SS T9405 oil T° O82 max. values 

measured (in g) 

1st start “Cold” 

2nd start “Hot1” 

3rd start “Hot2” 

4th start “Hot3” 

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Objet : Attestation d’application de l’IT n°292 72 2850.

Subject: TI No. 292 72 2850 compliance certificate. 

Important / Important notice :

Après application des instructions spécifiées dans cette instruction technique, veuillez compléter la 

présente attestation et la retourner par courrier ou courriel ou fax à (se reporter au paragraphe 5.E.5): 

After application of the instructions specified in this technical instruction, please complete this certificate and 

mail or email or fax it to (refer to paragraph 5.E.5):

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 

Module M01 

* 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:

Niveau vibratoire <13g 

Vibration level < 13g

Niveau vibratoire ≥ 13g

Vibration level ≥ 13g

Résultats du contrôle (cocher la case correspondante) 

Inspection result: check the corresponding box 

Conforme 

Compliant 

Non conforme

Not compliant 

Niveau vibratoire maximum en g 

Maximum vibration level in g g 

Je certifie que le module identifié ci-dessus a été contrôlé selon les directives de cette instruction 

technique. 

I certify that the above-mentioned module has been controlled according to the directives given in this 

technical instruction. 

Date [JJ / MMMM (en lettre) / AAAA 

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

 

ANNEXE 2 / APPENDIX 2 

Signature : 

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