## BOLLETTINO TECNICO N° 

# 1 39 -368

The technical content of this document is approved

under the authority of DOA nr. EASA.21J.005 DATE March 19, 2014

REV

. /

Compliance with

this bulletin is:

Page 1 of 9 SUBJECT: INSPECTION / REPLACEMENT OF LOWER HALF SCISSOR SPHERICAL

BEARING P/N 3G 62 30 V 00 654.

REASON: to identify and replace potentially defective lower half scissor spherical

bearings.

HELICOPTERS AFFECTED:

Part I: all AB 139 /AW139 helicopters installing MR Rotating Scissors P/N

3G62 30A 0073 3 with S/N listed in Table 1 or repaired installing a lower half

scissor spherical bearing P/N 3G6230V00654 with S/N listed in Table 2.

Part II: all MR Rotating Scissors P/N 3G6230A00733 with S/N listed in Table 1 and all

lower half scissor spherical bearing P/N 3G6230V00654 with S/N listed in Table

2 and all MR Rotating Scissors P/N 3G6230A00733 repaired installing a lower

half scissor spherical bearing P/N 3G6230V00654 with S/N listed in Table 2

,

either installed or kept in stock.

## B.T. 139- 368

Page 2 of 9 COMPLIANCE:

Part I : within five (5 ) flight hours or one (1) week from receipt of this Bollettino Tecnico,

whichever comes first, and then every five (5) flight hours up to accomplishment

of Part II.

Part II : within fifty (5 0) flight hours or thirty (30) days from receipt of this Bollettino

Tecnico whichever comes first.

DESCRIPTION: the supplier of the lower half scissor spherical bearing P/N

3G6230V00654 has indicated a list of S/N that are potentially affected by a quality

issue. Scope of this Bollettino Tecnico is to identify and replace potentially defective

lower half scissor spherical bearings in service establishing a tight interim inspection

s chedule to reduce the impact on aircraft operations in service.

REQUIRED MANPOWER: it is estimated that, in order to accomplish this Bollettino

Tecnico the following maintenance man-hours (MMH) are necessary:

Part I : one (1) MMH ;

Part II : two (2) MMH.

Man-hours are based on hands-on time and may vary with personnel and facilities

available.

WARRANTY: Owners/Operators who comply with the COMPLIANCE INSTRUCTIONS,

no later than the applicable date in the “Compliance section”, will be eligible to

receive replacements parts on a “free of charge basis”.

NOTE: Customers who fail to comply with the instructions in this Bollettino Tecnico

before the compliance date are not eligible for the aforementioned special policy.

Issue relevant W.M.M. form ( (W)arranty Claim (M)aintenance Work Order

(M)alfunction Report ) to your Warranty Administration Dpt.”

## B.T. 139- 368

Page 3 of 9 REQUIRED MATERIALS: th e following materials, necessary to accomplish P art II of this

Bollettino Tecnico , can be requ est ed to AgustaWestland:

P/N DESCRIPTION Q.TY Note

3G6 230V00654 Lower half scissors spherical bearing AR (1)

Moreover the following consumable materials, or equivalent, are necessary to

comply with this Bollettino Tecnico:

Spec./AW code number DESCRIPTION Q.TY Note

MIL

- L

- 19537C Acrylic Lacquer (C081) AR Local supply

Notes:

(1) As an alternative to lower half scissor spherical bearing s , MR rotating scissors

P/N 3G62 30 A 00 733 may be supplied.

Refer to AMDI for the consumable materials necessary to comply with the AMP data

modules referenced in P ar t II of this Bollettino Tecnico.

SPECIAL TOOLS: the following special tools are necessary to accomplish this

Bollettino Tecnico:

P/N DESCRIPTION Q.TY NOTES

RMGE

- DS

- 06

- 2010

- LH or

an approved alternative Platform (GG

- 01

- 00)

AR (2)

RMGE

- DS

- 06

- 2010

- RH or

an approved alternative Platform (GG

- 02

- 00)

Commercial Permanent black in felt

pen Local supply

Commercial Etch pen Local supply

Notes:

(2) Refer to Illustrated Tools and Equipment Publication (ITEP). See data modules

39 -A- GG -01- 00 -00A-066A-A and 39-A- GG

- 02

- 00 -00A-066A- A.

Refer to Illustrated Tools and Equipment Publication (ITEP) also for other special

tools required to comply with the AMP data modules referenced in P art II of this

Bollettino Tecnico.

## B.T. 139

- 368

Page 4 of 9 WEIGHT AND BALANCE CHANGES: N.A.

REFERENCES:

 AW139 Aircraft Maintenance Data Information (AMDI)

 AW139 Aircraft Maintenance Publication (AMP)

 AW139 Illustrated Tools and Equipment Publication (ITEP)

PUBLICATIONS AFFECTED: N.A.

COMPLIANCE INSTRUCTIONS:

Part I

1. Prepare the helicopter for a safe ground maintenance. Disconnect the battery and all

the electrical power sources and/or the external power supply. Refer to AMP, see

DM n° 39

- A

- 00

- 20

- 00

- 00A

- 120A

- A.

2. Put the p latform s ( GG

- 01

- 00 and GG

- 02

- 00), or approved alternative s , adjacent to

the left and to the right side of the fuselage , respectively

.

3. Open access door 473AL

. Refer to AMP, see DM n° 39

- A

- 06

- 41

- 00

- 00A

- 010A

- A.

4. With reference to F igure 1, get access to the MR area and perform a general v isual

i nspection of the MR r otating s cissors P/N 3G6230A00733 and an o perational c heck

for play and wear of the lower half scissors spherical bearing P/N 3G6230V00654

( refer to section A

- A ) , paying particular attention to the bearing staking condition; to

do this manually move the bottom rotating scissors along the axis of the spherical

bearing.

4 .1. If no unusual play and/or wear is detected , no further action is required. Go to

step 5

.

4 .2. If unu sual play and/or wear is detected, perform a d etailed i nspection for

condition, damage and play of the MR r otating s cissors according to steps 9

through 12.9 of AMP DM n° 39

- C

- 62

- 31

- 00

- 00A

- 286C

- A.

4 .2.1. If play is within limits , no further action is requi red. Go to step 5

.

## B.T. 139

- 368

Page 5 of 9 4 .2.2. If play is beyond limits or wear is detected, report findings to AW139

Product Support Engineering (aw139.mbx@agustawestland.com).

5. Close access door 473AL. Refer to AMP, see DM n° 39

- A

- 06

- 41

- 00

- 00A

- 010A

- A.

6. Remove the platforms fro m left and right sides of the fuselage.

7. Return helicopter to flight configuration and record for compliance with P art I of this

Bollettino Tecnico on the helicopter logbook

.

Part II

1. Prepare the helicopter for a safe ground maintenance. Disconnect the batte ry and all

the electrical power sources and/or the external power supply. Refer to AMP, see

DM n° 39

- A

- 00

- 20

- 00

- 00A

- 120A

- A.

2. Put the p latform (GG

- 01

- 00), or an approved alternative, adjacent to the left side of

the fuselage.

3. Open access door 473AL. Refer to AMP, see DM n° 39

- A

- 06

- 41

- 00

- 00A

- 010A

- A.

NOTE

As an alternative to the replacement of lower half

scissor spherical bearing P/N 3G6230V00654

described at following step 4

, it is allowed to replace

MR rotating scissors according to AMP DM n° 39

- C

62

- 31

- 02

- 0 0 A

- 5 20A

- A / 39

- C

- 62

- 31

- 02

- 00A

- 720A

- A

installing new components not affected by this

Bollettino Tecnico according to Table 1.

S end the affected MR rotating scissors P/N

3G6230A00733 (the ones removed or kept in stock)

to AgustaWestland to perform the lower half scissor

spherical bearing replacement and to mark the letter

“R” after the S/N of the MR rotating scissor P/N

3G6230A00733

.

## B.T. 139- 368

Page 6 of 9 4. With reference to figure 1 , get access to the MR rotating scissors area and replace

the lower half scissor spherical bearing as described in the following procedure :

4.1. Remove and disassemble the MR rotating scissors. Refer to to AMP, see DM n°

39

- C

- 62

- 31

- 02

- 00A

- 520A

- A / 39C

- 62

- 31

- 02

- 00A

- 530A

- B.

4.2. Replace affected lower half scissor spherical bearing P/N 3G6230V00654

according to AMP DM n° 39-C- 62

- 31

- 02 -03A- 920 A- B.

NOTE

Discard all the affected lower half scissor spherical

bearings P/N 3G6230V00654 with S/N as per Table

2 removed at step 4.2. and kept in stock.

4.3. Mark on MR lower scissor lever assy P/N 3G6230A00934 the letter “R” after th e

S/N of the MR rotating scissor P/N 3G6230A00733

.

4.4. Mark the letter “R” on MR lower scissor P/N 3G6230A00934 by means of

permanent black ink felt pen and apply Acrylic Lacquer (C081) or by means of

etch pen.

4.5. Assemble and install the MR rotating scissors. R efer to to AMP, see DM n° 39

-

C

- 62

- 31

- 02

- 00A

- 710A

- B / 39

- C

- 62

- 31

- 02

- 00A

- 720A

- A

5. Close the access door 473AL. Refer to AMP, see DM n° 39

- A

- 06

- 41

- 00

- 00A

- 010A

A.

6. Remove the platform from the left side of the fuselage.

7. Return helicopter to flight configuration a nd record for compliance with P art II of this

Bollettino Tecnico on the helicopter logbook and mark the letter “R” after S/N on the

MR rotating scissor logcard

.

## B.T. 139

- 368

Page 7 of 9 Figure 1 BETTER

B ETTER

## B.T. 139

- 368

Page 8 of 9 TABLE 1

MR Rotating Scissors P/N 3G6230A00733 affected S/N

V1

V2

V3

V4

V5

V7

V8

V9

V10

V11

V12

V13

V14

V15

V16

V17

V18

V19

V20

V21

V22

V23

V24

V25

V26

V27

V28

V29

V30

V31

V32

V33

V34

V35

V36

V37

V38

V39

V40

V41

V42

V43

V44

V45 V46

V47

V48

V49

V50

V51

V52

V53

V54

V55

V56

V57

V58

V59

V60

V61

V62

V63

V64

V65

V66

V67

V68

V69

V70

V71

V 72

V73

V74

V75

V76

V77

V78

V79

V80

V81

V82

V83

V84

V85

V86

V87

V88

V89 V90

V91

V92

V93

V94

V95

V96

V97

V98

V99

V100

V101

V102

V103

V104

V105

V106

V107

V108

V109

V110

V111

V112

V113

V114

V115

V116

V117

V118

V119

V120

V121

V122

V123

V124

V125

V126

V127

V128

V129

V130

V131

V132

V133 V134

V135

V136

V137

V138

V139

V140

V141

V142

V143

V144

V145

V146

V147

V148

V149

V150

V151

V152

V153

V154

V155

V156

V157

V158

V159

V160

V161

V162

V163

V164

V165

V166

V167

V168

V169

V170

V171

V172

V173

V174

V175

V176

V177 V178

V179

V 180

V181

V182

V183

V184

V185

V186

V187

V188

V189

V190

V191

V192

V193

V194

V195

V196

V197

V198

V199

V200

V201

V202

V203

V204

V205

V206

V207

V208

V209

V210

V211

V212

V213

V214

V215

V216

V217

V218

V219

V220

V221 V222

V223

V224

V225

V226

V227

V228

V229

V230

V2 31

V232

V233

V234

V235

V236

V237

V238

V239

V240

V241

V242

V243

V244

V245

V246

V247

V249

V250

V251

V252

V253

V254

V255

V256

V257

V258

V259

V260

V261

V262

V263

V264

V265

V266 V267

V268

V269

V270

V271

V272

V273

V274

V275

V276

V277

V278

V279

V280

V281

V282

V28 3

V284

V285

V286

V287

V288

V289

V290

V291

V292

V293

V294

V295

V302

V303

V304

V305

V432

V433

V434

V435

V436

V437

V438

V439

V440

V441

## B.T. 139

- 368

Page 9 of 9 TABLE 2

Lower Half Scissor Spherical Bearing P/N 3G6230 V 00 654 affected S/N

KC1

KC2

KC3

KC4

KC5

KC6

KC7

KC8

KC10

KC11

KC12

KC13

KC14

KC15

KC16

KC17

KC18

KC19

KC20

KC21

KC22

KC 23

KC24

KC25

KC26

KC27

KC28

KC29

KC30

KC31

KC32

KC33

KC34

KC35

KC36

KC37

KC38

KC39

KC40

KC41

KC42

KC43

KC44

KC45

KC46

KC47 KC48

KC49

KC50

KC51

KC52

KC53

KC54

KC55

KC56

KC57

KC58

KC59

KC10000

KC10001

KC10002

KC10003

KC 10004

KC10005

KC10006

KC10007

KC10008

KC10009

KC10010

KC10011

KC10012

KC10013

KC10014

KC10015

KC10016

KC10017

KC10018

KC10019

KC10020

KC10021

KC10022

KC10023

KC10024

KC10025

KC10026

KC10027

KC10028

KC10029

KC10030

KC10031

KC10032

KC10033 KC10034

KC10035

KC 10036

KC10037

KC10038

KC10039

KC10040

KC10041

KC10042

KC10043

KC10044

KC10045

KC10046

KC10047

KC10048

KC10049

KC10050

KC10051

KC10052

KC10053

KC10054

KC10055

KC10056

KC10057

KC10058

KC10059

KC10060

KC10061

KC10062

KC10063

KC10064

KC10065

KC10066

KC10067

KC 10068

KC10069

KC10070

KC10071

KC10072

KC10073

KC10074

KC10075

KC10076

KC10077

KC10078

KC10079 KC10080

KC10081

KC10082

KC10083

KC10084

KC10085

KC10086

KC10087

KC10088

KC10089

KC10090

KC10091

KC10092

KC10093

KC10094

KC10095

KC10096

KC10097

KC10098

KC10099

KC 10100

KC10101

KC10102

KC10103

KC10104

KC10105

KC10106

KC10107

KC10108

KC10109

KC10110

KC10111

KC10112

KC10113

KC10114

KC10115

KC10116

KC10117

KC10118

KC10119

KC10120

KC10121

KC10122

KC10123

KC10124

KC10125 KC10126

KC10127

KC10128

KC10129

KC10130

KC10131

KC 10132

KC10133

KC10134

KC10135

KC10136

KC10137

KC10138

KC10139

KC10140

KC10141

KC10142

KC10143

KC10144

KC10145

KC10146

KC10147

KC10148

KC10149

KC10150

KC10151

KC10152

KC10153

KC10154

KC10155

KC10156

KC10157

KC10158

KC10159

KC10160

KC1016 1

KC10162

KC10163

KC10164

KC10165

KC10166

KC10167

KC10168

KC10169

KC10170

KC10171 KC10172

KC10173

KC10174

KC10175

KC10176

KC10177

KC10178

KC10179

KC10180

KC10181

KC10182

KC10183

KC10184

KC10185

KC10186

KC10187

KC10188

KC10189

KC10190

KC10191

KC10192

KC1019 3

KC10194

KC10195

KC10196

KC10197

KC10198

KC10199

KC10200

KC10201

KC10202

KC10203

KC10204

KC10205

KC10206

KC10207

KC10208

KC10209

KC10210

KC10211

KC10212

KC10213

KC10214

KC10215

KC10216

KC10217 KC10218

KC10219

KC10220

KC10221

KC10222

KC10223

KC10224

KC1022 5

KC10226

KC10227

KC10228

KC10229

KC10230

KC10231

KC10232

KC10233

KC10234

KC10235

KC10236

KC10237

KC10238

KC10239

KC10240

KC10241

KC10242

KC10243

KC10244

KC10245

KC10246

KC10247

KC10248

KC10249

KC10250

KC10251

KC10252

KC10253

KC10254

KC10255

KC10256

KC1025 7

KC10258

KC10259

KC10260

KC10261

KC10262

KC10263 KC10264

KC10265

KC10266

KC10267

KC10268

KC10269

KC10270

KC10271

KC10272

KC10273

KC10274

KC10275

KC10276

KC10277

KC10278

KC10279

KC10280

KC10281

KC10282

KC10283

KC10284

KC10285

KC10286

KC10287

KC10288

KC1028 9

KC10290

KC10291

KC10292

KC10293

KC10294

KC10295

KC10296

KC10297

KC10298

KC10299

KC10300

KC10301

KC10302

KC10303

KC10304

KC10305

KC10306

KC10307

KC10308

KC10309 KC10310

KC10311

KC10312

KC10313

KC10314

KC10315

KC10316

KC10317

KC10318

KC10319

KC10320

KC1032 1

KC10322

KC10323

KC10324

KC10325

KC10326

KC10327

KC10328

KC10329

KC10330

KC10331

KC10332

KC10333

KC10334

KC10335

KC10336

KC10337

KC10338

KC10339

KC10340

KC10341

KC10342

KC10343

KC10344

KC10345

KC10346

KC10347

KC10348

KC10349

KC10350

KC10351

KC10352

KC1035 3

KC10354

KC10355 KC10356

KC10357

KC10358

KC10359

KC10360

KC10361

KC10362

KC10363

KC10364

KC10365

KC10366

KC10367

KC10368

KC10369

KC10370

KC10371

KC10372

KC10373

KC10374

KC10375

KC10376

KC10377

KC10378

KC10379

KC10380

KC10381

KC10382

KC10383

KC10384

KC1038 5

KC10386

KC10387

KC10388

KC10389

KC10390

KC10391

KC10392

KC10393

KC10394

KC10395

KC10396

KC10397

KC10398Note:

Remarks:

Informazioni:

Information:

Al f ine di gestire le varianti alla configur azione base, in relazione all’emissione de l Bollettino Tecnico, preghiamo di voler compilare il presente modulo in tutte le sue parti e sped irlo all’indirizzo sopra indicato. Si ring razia per la gentile collaborazione data.

We request your cooperation in filling this form, in order to keep out statistical data relevant to aircraft configuration up- to-date. The form should be filled in all

its parts and sent to the above address. We thank you beforehand for the information given. **MODULO APPLICAZIONE BOLLETTINO TECNICO**

TECHNICAL BULLETIN COMPLIANCE FORM Data:

Date:

Numero:

Number:

Revisione:

Revision: Prego spedire a questo indirizzo:

Please send to the following address:



### AGUSTA **WESTLAND S.p.A.** 

CUSTOMER SUPPORT & SERVICES - ITALY

PRODUCT SUPPORT ENGINEERING DPT.

Via del Gregge, 100

2101 5 Lonate Pozzolo (VA) - I T ALY

T el

. : +39 0331 664905

Fa x : +39 0331 66468 4

Telefono:

Telephone:

Fax:

Data Applicazione B.T.:

B.T. Compliance Date: Denominazione Cliente ed Indirizzo:

Customer Name and Address:

Modello Elicottero

Helicopter Model S/N Matricola

Tail Number Ore Totali

Total Hours Ore D.U.R.

T.S.O.