## BOLL ETT I NO T E CN ICO N• 

# 139-129 Th e technical content of thi s documen t is approved u nder the authority of OOA n r. EASA 21 J . OOS DATE June 3 , 2008
Compliance with th is bulletm is : 

### S UBJECT: COCK PIT DOO RS WI N DOWS RE PLAC E M E NT REV.



### R EASO N: Some cases of in flight breakage of cockpit doors windows have been reported in service. Th is Bollettino provides the necessary inst ruct i ons to upgrade the aircraft configu ration wi t h an improved design . NOT E This Boii<Stt,no supersedes BT 139-087 Rev A 

### HELICOPTERS A F FE CTE D: AB139/AW139 helicopters from SIN 31005 to S/N 31131 (except S/N 31007 , 31094 and 31124) , from SIN 31201 to SIN 31209 and fro m S/N 41001 to S/N 41013 (except S/N 41012) . 

### C OMPLIA NC E : with in 200 FH or 6 months from receipt of th i s Bollettino , whichever comes first 

### DE S CRIPTION: T his Boll ettino prescribes th e rep l aceme nt of th e cockpit doors win dows with a more robust desi g n. Moreover an add it i ona l strap to a ll ow imm ed i ate j ettison in eme rge ncy is installed together with a new externa l p l acard .

-\I**;~o,:. :**  ..**a:~ ~.-·r1**  .;rc.... c**~~ --Z~ca.**  r.**•~.::** a**rcra~ o~** **c~C.\** ....**~c.- ~.;c.:;:-~·** **;~-** :-· .:**:.wr~ rsr:** **~ ~f** **•~.-a:t ;~as**  :n.3'it;ec ;:.cas-e**ro~n.:;tc** tc -.cw Jvrar Page 1 of 19

## B.T. 139-129 Rev./ In order to expedite parts availability to the customer, for the time being also the aircraft having the optional LHS sliding windows will receive a plain LHS improved window for the upgrade. This is reflected in the list of required materials. REQUIRED MANPOWER : 

### It is estimated that in order to accomplish this Bollettino four (4) man-hours are necessary. Man-hours are based on hands-on time and may vary w1th personnel and facilities availab le . WARRANTY: 

### ./ Upon request , the parts required to apply this Bollettino shall be supplied on a free of charge basis by Agusta , except for the consumable materials . ./ Upon application of this Bollettino , Customers are requested to submit to Agusta Warranty Administration a Maintenance Malfunction Information Report duly completed in all its parts . REQU IRED MATERIALS : 

### the following materials , necessary to accomplish this bollettino , can be required to AgustaWestland : 

### P

I N DES CRIPTION 

### Q.TY 3P5211A48131A1 

### (1) Storm Window Assy RHS 1 3P5211A 1 0152A 1 ( 1) Cockpit Door Window LHS 212-072-636-109 Decal 2 999-1700-48-1 01 G (2) Seal AR 3G5610A04751 Strap 2 MS35207-230 Bolt 2 A436A06A2 Nut 

### 2 A994A15T010D Washe · 

### 4 Moreover, the followi ng consumable materials , nece ssar y to accomplish this bollettino . can be required to AgustaWestland : Page 2 of 19

## B.T. 139-129 Rev. 

## I PIN DESCRIPTION Q.TY 

### 590210190 (2) Cloth , CCC-C-46 (C011) 900002980 (2) Adhesive , RTV 732 , 199-05-152 Ty . I cl. I I (C126) AR 32002675 (2) Solvent , commercial , Methy l-ethyl- ketone (MEK ) (C005) AR 531050415 Ethyl Alcoho l, commercial AR 590160418 Abrasive Paper, P-C-451 , 320 grit grade (C0 17) AR SPECIAL TOOLS: the followin g special tools a r e required to accomp l ish this Bo ll ettino : PIN DESCRJPTJON Q.TY 

### 3G5605G00132 Tool kit , windows insta llation (GF-94-00) 1 composed by · 3G5605G00251 Hook, seal expander . 1 3G5605G00551 (3) Tool, sea l wedge insta ll ati on .1 Local supply (2) Plastic scraper 

### 1 Local supply Non alcoholic pencil 

### 1 Local supply Hand saw 1 Local supply Clamp 1 Customer must order the tools to AgustaWestland , if required . Notes: 

### (1) Contact AW139 Custome r Suppo rt Eng ineering (aw 39 mbx(W,aqustawc:;stla'ld cc...-; ) fo r details o n optional LHS storm windows and spare parts . (2) Depend ing on existing seal condition . Refe r to step 6 . (3) Tool P/N CP293 can be used as an alternative to P/N 3G5605G00551. W EIGHT AND BALANCE CHANG ES: N.A. 

### REFERENCES: .; AW139 Material Data Information ( AMDI ) ../ AW139 Aircraft Ma inte nance Publ icati o n (AMP) ../ AW139 Illu strated Tools and Equipment Publ i cation (ITEP) Page 3 of 19

## B.T. 139-129 Rev./ PUBLICATION S AFFECTED: ./ AW139 Aircraft Maintenance Publication (AMP) ./ AW139 I llustrated Parts Data ( IPD) ./ AW139 Rotorcraft Flight Manual (RFM) C OMP LIA N C E IN STR U CTIONS: 1 . Prepare the helicopter for a safe ground maintenance . Disconnect the battery and all the electrical powe r sources and/or the external power supply . Refer to AMP , see data module no 39-A-00-20-00-00A-120A-A. 2. With reference to figure 1 , gain access to the cockpit door window (1) on the left side of the aircraft . 3 . With reference to figure 1 , remove the cockpit door window (1) as follows : 3.1 Remo ve the red strap (3 ) from the clinch stud (7). 3 . 2 Pull the red strap (3) and fully remove the filler wedge (5) from the seal (6) 3 . 3 Hold the transparent (2) to make sure that it does not fall down . CAU T I O N iVl a l<e s ure you do 11ot da M ag e th e t ra ns n a re nt w'1en you ret'OVe it & roill door. It wil' be u se•u ! :o h e lp 1 ew cock;Jit doo r wind ow in st all ati o n . 3.4 Carefu ll y push the transparent (2) inboard. Remove the transparent (2) from the seal (6) . Do not remove the seal (6) from the door structure (4 ) . 4 . Do a visua l inspection of the seal for damage and condition . 4 . 1 If you find that t h e seal is damaged or cut . replace the sea l with a new one as described at step 5 . 4.2 If you find t h at the seal is in good condition. go to step 6 . to check th e new door window dimensio n . 5 W ith reference to f ig ure 3 . insta l l a new sea l P/ N 999-1700-48-101 G as fo ll ows

Page .11 of 19 WARNiN G THE 

## so :_ VENT (CC0 5 ) J S A**DAN GE** **~OU S** **it~ =~** **IAL. 8E!=** **~E** YOU U SE lT, lii!AK !: S U RE n-'AT 

## vou KNOW A L L TH E SA FE TY

## B.T . 139-129 Rev ./ PRECAUTIONS AND F iRST A!D INSTRUCTIONS FOR 

### THI S MATERIAL. 

### REFER TO AMD! 

### (SEE DATA MODULE N. 

### 39-A-00-50-00-0 0A -074A-D). 5.1 If necessary, remove the rubber particles with the Plastic Scraper. Clean the seal seat on the door structure with the Cloth (C011) and the Solvent (COOS). Dry 

### the cleaned area with the clean cloth. CAUTION With reference to figure 2 , make sure that the sea l and the filler wedge length is 2320 mm. 5.2 Make a little mark at the middle of the top window frame . Cut the seal PIN 999- 1 700-48-101 G and keep it at the middle with your hands . 5 . 3 Clean the seal with ethyl alcohol before installation . Make sure that the sea l grooves are free from dirt . WAR NIN G 

### THE ADHESIVE (C126 ) I S A DANG E ROUS MAT ER IAL. BEFORE YOU USE IT, MAKE SURE TH AT YOU KNOW ALL T HE SA FETY PRECA UTIONS AND . FlRST AID INSTRUCT! ON$ FOR THIS MAT ER IAL. REFER TO A M D I (SEE DATA MODULE N. 39 -A -00-50-00-00A-074A-D ). 5.4 With reference to figures 3 and 4 , bond the groove of the sea l over the whole perimeter on fuselage side only with Adhesive (C126). NOTE
5.5 Carefully put the sea l on the door structu re . Sta rt fmm the middl e top of th e wind ow frame . Make sure that the middl e of the seal is ali gned with th e m a rk on the wi ndow frame . Refer to fig ure 2 to check the correct sea l position .
Page 5 of 19

## B.T.139-129 Rev./ CAUT I ON Do not pu' ' : he sea l w'-,i'e you ;'lstall ·: o.,

**t~e ~~'J~**  structu'"e. Be carefu l whe'l you l'l sta' ' the sea o-

**~:...o** curves of t1 e window

**f~arne** 5 . 6 At the end of the in stallation you have the seal butt joint at the middle bottom of the window frame. Refer to figure 2 to check the correct seal position. CAUTION

- he

**bu~** j o irt must have no cle arance between he two sea l heads 5 .7 If there is clearance between the two seal heads , contact AW- 139 Customer Support Engineering (aw139.mbx@agustawestland .com) . 6 . Prepare new window P/N 3P5211 A 10152A 1 as follows :

---:::. '=I\
6 . 1 Put the transparent removed at step 3 . on a work bench. 6 . 2 (Applicable to storm windows) With reference to figure 5, do as follows: 6 .2 . 1 Remove the two screws (2) and the screw (3) . 6 . 2 . 2 Remove the three nuts (6) . 6 . 2 3 Remove the stop (5) and the washers (7) and (8). 6.2.4 Remove the handle assy (4) from the storm window (1) . 6 3 Put a suitable paper sheet (whose surface is bigger than the cockpit window area ) on the transparent. Make sure that it adheres perfectly to the transparent surface .

Page 6 of 19

## B.T . 139-129 Rev./ 6.4 Using the transparent as a template , draw its contour on the paper sheet. 6.5 Put the new transparent on the paper sheet (remove the handle assy as described at step 6.2 in case it is a storm window). Use clamps in places previously recorded to make the paper sheet adhere perfectly on the transparent surface . 6.6 According to the contour drawn on the paper sheet , sign the new boundary with a non alcoholic pencil on the new transparent, if required. 6 .7 Remove the transparent from the paper sheet and place it on a suitab le bench . CAUTION 

### Do not engrave the transparent. 6.8 Trim the transparent to the new marked contour. Use a hand saw (and NOT a circu lar automatic saw) to cut the material in excess . 6.9 (Applicable to storm windows) With reference to figure 5 , install the handle assy (4) on the storm window (1) using hardware removed at step 6.2 . 6.10 With reference to figure 9 and figure 1 0 section Z-Z , install strap P/N 3G561 OA04751 on the transparent using bolt P/N MS35207-230 , nut P/N A436A06A2 and two washers P/N A994A15T0100 . 7. With reference to figure 3 , install t he cockpit door window in the groove of the seal as follows : 7 .1 C lean the cockpit door window with ethyl alcohol and grind with abrasive paper (C017) on internal and external side by a depth of 5 mm . Remove sharp corners from the window . Chamfering is allowed up to a maximum of 0.5 mm . 7 .2 Put the cockpit door window in its position against the sea l. Hold the cockpit door window and , at the same time , lock the cockpit door with your hands . 7.3 Open the lip of the seal with the Hook P/N 3G5605G00251 . Start from the top and carefully install the cockpit door window in the seal. Continu e until all the window edge is in the groove of the seal. 8 . With reference to figure 1 , install the filler wedge in the related groove of the sea l as follows : 8 . 1 Keep the filler wedge at its middle with your hands . 8 .2 Clean the filler wedge with ethyl alco hol before install ation. Page 7 of 19

## B.T. 139-129 Rev. / 8 . 3 With reference to figure 1 , put the filler wedge (5) in the related eyelet of the red strap (3). Move the red strap (3) in the m i ddle positi on of the filler wedge (5). CAUTION An impro oer usage of the sea l wedge installatior too l can cause

**dar~age** to the seal. It is suggested to get used to the filler in sta ll ation procedure oefore aoolying it on the window . Refe' to figu:-e 

### 6 for details_ CAUTION Do not pu ll the fill e r wedge to make its install ation easier. 17 you pu ll it a deformation wil' occur a!o1g the filler wedge contour. T'1is deformation decreases the seal s:rergth CAUTION Do not oull the filler wedge while you 1nstal'

**~~** i'"' •'le sea'. Do not

**~orque t~e**  filler wedge wher you i-rstal' 

### i: h he curves of

**~he** sea l 8.4 Carefully put the filler wedge in the related groove of the seal with the Tool P/ N 3G5605G00551 . Start from the middle bottom of the sea l and go on until the fi l ler wedge is near the black strap position . Refer to figures 7 and 8 for details . 8 .5 With reference to figures 9 a nd 10, insert the filler wedge in the rel ated eyelet of the black strap P/N 3G561 OA4751. Adjust the black strap position as required and go on with fil ler wedge insta llation . 8 . 6 At the end of installation you have the seal butt joint in position indicated in figure 2 . Refer to fi gure 2 to check the correct fille r wedge positi on .

**CA~riON** 8 .7 If there is cl ea ra nce between th e two filler heads. cont act AW1 39 Custom e r Suppo rt Eng in eerin g (aw139 .mbx@agustawestland .com) . 9. With reference to figure 1 , att ach the red strap (3) to the cl i nch stud (7). Page 8 of 19

## B.T. 139-129 Rev./ 10. With reference to figure 11 , do as follows : 10.1 Remove decal PIN A181A001E1 ( 1 ) 

### from cockp it door window internal s ide . Refer to AMP, see OM no 39-A- 11 -00-01-00A- 5208-A. 10.2 Re pl ace decal P/N 999 -2701 -45-509 (2) with new one P/N 212-072-636-109 on cockpit door externa l side . Refer to AM P , see OM no 39-A-11-00-01-00A-520AA and OM no 39-A-11 -00-01-00A-720A-A. 11. With reference to figure 1 , 

### gain access to the cockpit door window (1) 

### on the right side of the aircraft and repeat steps 3 . thru 10. to install the right cockpit door window P/N 3P5211A48131A1. 12 . Return helicopter to flight configuration and record for compliance of th is bollettino .

Page 

### 9 of 

### 19

## 6.1' . '\39-'\29 ReV. I

, 

### ~==~T coct<.D\T oooR wiNOOW SHOWN , i'<PICAL fOR RIG I-Ii " , 

### cocKPii oooR...-' WINOOW /

3

A

page 

### ~0 of 

### ~9 5 6 2

f\gure '\ 1 

# 0 I'(P \ CA L { I
7SEAL BUTT JOINT 

## B.T. 139-129 Rev. 

## I A

- I



### ... i 

## A

EXTRACTION STRAP 

### ! 

# ' 0.qN

' FILLER WEDGE

BUTT JOINT

NOTE : LENGTH OF COCKPIT DOOR WINDOW FIL LE R WEDGE MUST BE 2320 

### mm Figure 2

Page 11 of 19

## B.T . 139-129 Rev./

CLEAN WINDOW PANEL BORDER AND DOOR FRAME AND LIP REMOVE TOP PA I NT FOR A BAND EQ UAL T O 9 mm TYP LH AND RH

IT IS FORBIDDEN T O STR ETCH TH E FIL LER TO DEFORM THE SECTION . TO MAKE INSTAL L AT ION EASIER TYP LH AND RH

INSTALL WINDOW WITH ; 999 - 1 700-48-101G SEAL (L 2320 mm) 999-1700- 49-101 G FILLER (L. 2320 mm) TYP LH AND RH

Page 12 of 19 

# SECTJON A - A

F I LLER LOCATION INSIDE SURFACE OF DOOR TYP LH AND RH

BOND SEAL ON FUSE LAGE S I DE ONLY WITH 199-05-1 52 TY I C L 2 (RTV 732) OVER T HE E NT I RE PER IMET ER TYP LH AN D RH 

# SECTION A-A Figure 3

## B .T. 139- 129 Rev./

KNURLED GROOVE (WINDOW SIDE)

SEAL P/N 999-1700-48- 101 G

/ COCKPIT DOOR WINDOW

COCKPIT DOOR FRAME ... FILLER WEDGE .....--- P/N 999-1700-4 9-101 G

SEA L P /N 999-1700 -48 - 101G

INSTALLED

Figure 4
Page 13 of 19

## B.T. 139-129 Rev . /

6 x2 

### 8 x2 

### 7 

# @(3 8



# ~~/ 5 4 ) 2x2



# ~ **~** 3

**~**



## e~ { Figure 5

Page 14 of 19 1

# B .T. 139-129 Rev./

Fi gure 6

Figure 7

Page 15 of 19

## B .T. 1 39-129 Rev . /

Figure 8

Page 16 of 19

## B.T. 139-129 Rev. 

## I

Fig ure 9 Page 17 of 1 9

## B .T. 139-129 Rev./

MS27980-178 

### snuo NA5114900363K UA9-ER

NASI832 -3-3 INSERT 

## SCHEMATIC SECTION J-J SHOWN FOR REFERENCE ON LY


### 3G56 1 OA4 751 STRAP

Page 1 8 of 1 9 

### A436A06A2 NUT 

### A994A15T0100**~ASHER** (2PQS ) 

### H535207-230 BOLT



## SECTION Z-Z Figure 10VI EW FROM OUTER SI DE 2 /

### I / 

# I

- ...,:- :. r' . S 

### . ..


# EMERGENCY EXIT PUSH WINDOW AT LOWER CORNER Figure 11 

## B .T . 139-129 Rev . /

VIEW FROM INN E R SIDE


# ' ) 

# ,

Page 19 of 19