# ASB No. EC130-52A009

Revision 0 2010-03-30 Page 1/19

Revision 1 2013-01-25 This document is available on the Internet: www.eurocopter.com/techpub 

### Civil version(s): B4



# ALERT SERVICE BULLETIN

SUBJECT: DOORS - Sliding door

Attachment of the sliding door star support

Corresponds to MOD 07 3796



### Revision No. Date of issue

Revision 0 2010-03-30

Revision 1 2013-01-25



### Summary:

Reinforce the sliding door star support attachment.



### Reason for last Revision:

The purpose of Revision 1 of this ALERT SERVICE BUL LETIN is to change Service Bulletin No. 52-009 into

ALERT SERVICE BULLETIN No. 52A009, to make mandator y the improvement of the sliding door star support

attachment.



### Compliance:

EUROCOPTER makes compliance with this ALERT SERVICE BULLETIN mandatory. For the attention of

# ASB No. EC130-52A009

Revision 0 2010-03-30 Page 2/19

Revision 1 2013-01-25 This document is available on the Internet: www.eurocopter.com/techpub 

### 1. PLANNING INFORMATION

1.A. EFFECTIVITY

1.A.1. Helicopters/installed equipment

Helicopters equipped with a sliding door P/N C526S1 101051, and:

- pre MOD 07 3796 (reinforcement of the sliding doo r star support attachment),

or - pre MOD 07 2921 (industrialized sliding door).



### NOTE 1

Refer to the aircraft individual inspection record

(or RIC AMS) to identify the actual modification st atus of the

aircraft.



### NOTE 2

Helicopters on which Service Bulletin No. 52-009 Re vision 0

was complied with, are not affected by this ALERT

SERVICE BULLETIN Revision 1.

1.A.2. Non-installed equipment

Sliding doors (P/N) C526S1101051 and:

- pre MOD 07 3796 (reinforcement of the sliding doo r star support attachment),

or

- pre MOD 07 2921 (industrialized sliding door).



### NOTE 1

Refer to the aircraft individual inspection record

(or RIC AMS) to identify the actual modification st atus of the

aircraft.



### NOTE 2

Helicopters on which Service Bulletin No. 52-009 Re vision 0

was complied with, are not affected by this ALERT

SERVICE BULLETIN Revision 1.



### 1.B. ASSOCIATED REQUIREMENTS

Not applicable.

# ASB No. EC130-52A009

Revision 0 2010-03-30 Page 3/19

Revision 1 2013-01-25 This document is available on the Internet: www.eurocopter.com/techpub 

### 1.C. REASON

Revision 0:

Avoid paint chips on the sliding door outside skin on external rivets, by reinforcing the star support pin

attachment.

Revision 1:

EUROCOPTER has been informed of an incident concern ing the star support pin rupture. This part is

located on the kinematics of the sliding door locki ng system.

The star support pin rupture make makes impossible all sliding door operations.

Investigations have revealed that the helicopter af fected had not complied with Revision 0 of this Ser vice

Bulletin No 52-009.

The purpose of Revision 1 is to:

- change Service Bulletin No. 52-009 into ALERT SER VICE BULLETIN No. 52A009, to make mandatory

embodiment of modification 07 3796 for the sliding door star support attachment,

- add a star pin dye penetrant inspection procedure

, - add removal and installation procedures of a part of the locking system kinematics,

- to make this revision compliant with the new ALER T SERVICE BULLETIN layout.

EUROCOPTER therefore makes mandatory the star pin c heck using dye penetrant inspection, as well as

compliance with the improvement (doubling the star support pin yoke).

Revision 1 of this ALERT SERVICE BULLETIN does not supersede compliance with Revision 0 of the

Service Bulletin No 52-009.



### 1.D. DESCRIPTION

The improvement consists in reinforcing the star su pport pin using a double yoke system, which enables the

rod stress to be more efficiently sustained, which thus avoids this pin to brake.



### 1.E. COMPLIANCE

1.E.1. Compliance at the works

Not applicable.

1.E.2. Compliance in service

The works must be performed on helicopter by the op erator.

Helicopters/Installed equipment:

Comply with Paragraph 3. of this ALERT SERVICE BULL ETIN before reaching 165 flying hours without

exceeding 2 years, following receipt of this ALERT SERVICE BULLETIN, issued on the date mentioned in

page footer.

Non-installed equipment:

Modify stock as per paragraphs 3.A. and 3.B.4. of t his ALERT SERVICE BULLETIN, prior to installation o n

helicopter and without exceeding 2 years.

# ASB No. EC130-52A009

Revision 0 2010-03-30 Page 4/19

Revision 1 2013-01-25 This document is available on the Internet: www.eurocopter.com/techpub 

### 1.F. APPROVAL

Approval of modifications:

The information or instructions relate to modificat ion 073796 which was approved on May 16, 2003 under the

authority of EASA Design Organization Approval No. 21J.056 for helicopters of civil versions subject t o an

Airworthiness Certificate.

Approval of this document:

The technical information contained in this Service Bulletin No. 52-009 Revision 0 was approved on

March 23, 2010 under the authority of EASA Design O rganization Approval No. 21J.056 for helicopters of

civil versions subject to an Airworthiness Certific ate.

The technical information contained in this ALERT S ERVICE BULLETIN Revision 1 was approved on

January 24, 2013 under the authority of EASA Design Organization Approval No. 21J.056 for helicopters of

civil versions subject to an Airworthiness Certific ate.



### 1.G. MANPOWER

For compliance with this ALERT SERVICE BULLETIN, EU ROCOPTER recommends the following personnel

qualifications:

Qualifications: - 2 Mechanical Technicians,

- 1 Composite Specialist.

Times are given for reference, for a standard confi guration.

Time for the operations: - 5 hours (approximately) for the removal/installation of the sliding door,

covering and linkage for 2 mechanical technicians,

- 5 hours (approximately) for the replacement of th e star support and glass

fabric plies for 1 composite specialist.

The estimated helicopter grounding time is one day and a half approximately, excluding curing time of glass

fabric ply/plies under vacuum bag and drying of the different products.



### 1.H. WEIGHT AND BALANCE

Weight: 0.06 kg.

Longitudinal moment: 0.143 m.kg

Lateral moment: -0.0555 m.kg

Vertical moment: -0.134 m.kg



### 1.I. EFFECT ON ELECTRICAL LOADS

Not applicable.



### 1.J. SOFTWARE MODIFICATION EMBODIMENT RECORD

Not applicable.

# ASB No. EC130-52A009

Revision 0 2010-03-30 Page 5/19

Revision 1 2013-01-25 This document is available on the Internet: www.eurocopter.com/techpub 

### 1.K. REFERENCES

The following documents are necessary for complianc e with this ALERT SERVICE BULLETIN:

Standard Practices Manual (MTC):

MTC: 20.01.01.301 : Miscellaneous products used on helicopters - Use of greases

MTC: 20.02.04.401 : Riveting - pitch and edge di stance

MTC: 20.02.04.402 : Installation of rivets for r etrofitting and repair

MTC: 20.02.04.601 : General riveting acceptance requirements

MTC: 20.02.05.401 : Joining - Joining by rivetin g

MTC: 20.02.06.401 : Safetying and locking of ass emblies - Safetying plain pins

MTC: 20.02.06.404 : Safetying and locking of ass emblies - Safetying with cotter pins

MTC: 20.02.09.101 : Check for cracks - General p rinciples applicable to dye penetrant inspection

procedure

MTC: 20.02.09.601 : Check for cracks - Check of structural components and parts by dye penetrant

inspection

MTC: 20.03.02.406 : General rivet replacement pr inciples - CHERRY-MAX rivets A.S.N.A. 0077 and 0078

MTC: 20.03.02.409 : General rivet replacement pr inciples - Installation of blind rivets ASN-NSA 191 9

and 1921

MTC: 20.03.06.406 : Structural repairs - Vacuum bag techniques

MTC: 20.04.01.102 : Cleaning of parts - Use of s tandard cleaning products on individual parts and o n

aircraft

MTC: 20.04.01.402 : Cleaning of parts - Cleaning removed detail parts with liquid solvents

MTC: 20.04.04.401 : Surface treatment before pai nting - Surface preparation before painting

MTC: 20.04.05.101 : General information concerni ng painting means and touch-up works

MTC: 20.04.05.420 : Paint and primer application procedure - Use of CA 8620 primer

MTC: 20.05.01.101 : General sealing procedures - General sealing methods

MTC: 20.05.01.102 : General sealing procedures - Sealing compound application methods

MTC: 20.06.01.101 : Bonding with adhesives - Gen eral rules for bonding with adhesive

MTC: 20.06.01.102 : Bonding with adhesives - Bon ding methods

MTC: 20.06.01.411 : Bonding with adhesives - Use of HYSOL EA 9396 adhesive

MTC: 20.06.01.418 : Bonding with adhesives - Use of EA 9395 adhesive

MTC: 20.07.02.201 : Safety instructions - Helico pter parked inside a hangar

MTC: 20.07.03.408 : Technical instructions - General principles applicable for visual cleanlines s

appearance checks on an aircraft after an inspectio n or a repair

MTC: 20.08.05.103 : General rules applicable in aeronautics - Monitoring of parts in operation, mar king

and service life customization

Aircraft Maintenance Manual (AMM):

AMM: 25-27-00, 4-2 : Covering - Removal / Instal lation - Door covering

AMM: 52-12-00, 4-1 : Removal - Sliding door

AMM: 52-12-00, 4-2 : Installation - Sliding door



### 1.L. DOCUMENTS AFFECTED

Not applicable.



### 1.M. INTERCHANGEABILITY OR MIXABILITY OF PARTS

Not applicable.

# ASB No. EC130-52A009

Revision 0 2010-03-30 Page 6/19

Revision 1 2013-01-25 This document is available on the Internet: www.eurocopter.com/techpub 

### 2. MATERIAL INFORMATION

2.A. MATERIAL: PRICE - AVAILABILITY - PROCUREMENT

For all information concerning the kits and/or comp onents, contact the EUROCOPTER Network Sales and

Customer Relations Department.

Order the required quantity from:

EUROCOPTER

Etablissement de Marignane

Direction Ventes et Relations Client (ECR)

13725 MARIGNANE CEDEX

FRANCE



### NOTE 1

On the purchase order, please always specify the mo de of

transport, the destination and the serial numbers o f the

aircraft to be modified.



### NOTE 2

For ALERT SERVICE BULLETINS, order by:

Telex: HELICOP 410 969F

Fax: +33 (0)4.42.85.99.96.



### 2.B. INFORMATION CONCERNING INDUSTRIAL SUPPORT

Not applicable.



### 2.C. MATERIAL REQUIRED FOR EACH HELICOPTER/COMPONEN T

Kits or components to be ordered for one helicopter or one assembly:

Key Word Qty New

P/N Item Former

P/N Instruction

Kit including: 1 350A0737960071 / / /

Cotter pin 1 EN2367-18020 10 EN2367-18020 Scrap

Cotter pin 3 23310CA010015 11 23310CA010015 Scrap

Plate 1 C526A2370201 15 / /

Angle bracket 1 C526A2369201 16 / /

Rivet 2 21215TB3205 18 / /

Blind rivet 4 ASNA0077E406 19 / /

# ASB No. EC130-52A009

Revision 0 2010-03-30 Page 7/19

Revision 1 2013-01-25 This document is available on the Internet: www.eurocopter.com/techpub Material to be ordered separately:

Key Word Qty New

P/N Item Former

P/N Instruction

Support AR 677-1-20-511 2 677-1-20-511 /

Rivet 1 NAS1919C04S03U 3 NAS1919C04S03U Scrap

Rivet 3 ASNA0077E403 4 ASNA0077E403 Scrap

Glass fabric AR ECS0030-27 6 ECS0030-27 Scrap

Dry carbon fabric AR ECS0031-12 13 / /

End fitting AR 677-1-10-514 14 677-1-10-514 /

Products to be ordered separately:

As per Tasks mentioned in this ALERT SERVICE BULLET IN and list below:

Key Word Qty Product P/N CM Item

Adhesive AR ECS6054-1031 6041 1

Adhesive tape AR Scotch 3M 471 or equivalent 783 5

Adhesive compound AR ECS0010.10 / 7

Primer paint AR ECS2067.20 / 8

Grease AR DCSEA354 115 9

Grease AR DCSEA395 101 12

Sealant AR ECS2068.10 6240 17

The products can be ordered separately, from INTER TURBINE AVIATION LOGISTICS company.

Website: http://www.interturbine.com

Phone: +49.41.91.809.300

AOG: +49.41.91.809.444



### 2.D. MATERIAL TO BE RETURNED

Not applicable.

# ASB No. EC130-52A009

Revision 0 2010-03-30 Page 8/19

Revision 1 2013-01-25 This document is available on the Internet: www.eurocopter.com/techpub 

### 3. ACCOMPLISHMENT INSTRUCTIONS

3.A. GENERAL

Read and comply with instructions for use of grease s as per MTC Work Card 20.01.01.301.

Read and comply with instructions for riveting as p er MTC Work Cards 20.02.04.401 and 20.02.04.402.

Read and comply with general riveting acceptance in structions as per MTC Work Card 20.02.04.601.

Read and comply with general instructions for joini ng by riveting as per MTC Work Card 20.04.05.401.

Read and comply with instructions for safetying and locking plain pins as per MTC Work Card 20.02.06.4 01.

Read and comply with instructions for safetying wit h cotter pins as per MTC Work Card 20.02.06.404.

Read and comply with instructions for cleaning part s as per MTC Work Cards 20.04.01.102 and

20.04.01.402.

Read and comply with general information on paintin g means and touch-up works as per

MTC Work Card 20.04.05.101.

Read and comply with instructions for bonding with adhesives as per MTC Work Cards 20.06.01.101 and

20.06.01.102.

Read and comply with safety instructions for parkin g an aircraft in a hangar as per

MTC Work Card 20.07.02.201.



### 3.B. OPERATIONAL PROCEDURE

3.B.1. Preliminary steps (Figure 1)

- Park the helicopter in a hangar.

- Clear access to work zones.

- Install suitable access means.

- Remove sliding door

(a) (Figure 1) as per AMM Task 52-12-00, 4-1 and install it on a workbench.

- Remove the sliding door (a) skin as per AMM Task 25-27-00, 4-2.

- Protect the covering of sliding door (a) and inst all it on a workbench.

3.B.2. Reinforcing the sliding door star support at tachment (Figures 1 to 6)

3.B.2.a. Disconnecting rods and removing the star ( Figure 1)

- Remove and discard cotter pins (e) (Detail A, Fig ure 1).

- Remove pins (d).

- Disconnect rods (b), (c) and (j) from star (h), a nd lock them in order to disengage the work zone.

- Remove and scrap cotter pin (f) and washer (g)

. - Remove star (h).

3.B.2.b. Visual inspection of upper and lower locki ng pin control rod end fittings (Figure 1)

- Examine both end fittings (s) (Detail A, Figure 1 ) and make sure that they are neither twisted nor

broken:

. if both end fittings (s) are neither twisted nor broken:

- leave as is,

- comply with Paragraph 3.B.2.c.

. if at least one of the two end fittings is twisted or broken : - using a rule, measure and record length (L),

- loosen locknut (r),

- loosen and remove end fitting (s) concerned,

- remove locknut (r),

- scrap end fitting (s),

- clean locknut (r) threading with Methyl-ethyl-ket one (13) in order to remove any trace of

thread lock,

# ASB No. EC130-52A009

Revision 0 2010-03-30 Page 9/19

Revision 1 2013-01-25 This document is available on the Internet: www.eurocopter.com/techpub

- screw locknut (r) on end fitting (14) threading t o length (L),

- screw end fitting (14) until locknut (r) touches the related rod,



### NOTE 1

End fitting (14) can be screwed in or out a quarter turn

maximum to enable free pin (d) fitting into star (h).

- lock the related rod in order to disengage the wo rk zone.

3.B.2.c. Checking the star support pin using dye pe netrant inspection (Figures 1 to 4)

- Clean zones X and Y (Detail C, Figure 3).

- Check for cracks on pin (k 1 ) of support (k), on zones X and Y using a dye pene trant inspection as per

MTC Work Cards 20.02.09.101 and 20.02.09.601.

. If no cracks are found:

- put star (h) in position (Detail A, Figure1),

- embody modification 07 3796 as per Paragraph 3.B. 2.d.

. If there is a crack:

- remove and scrap glass fabric plies (p) (interven tion zone E, Figure 4),

- clean contact surfaces between glass fabric plies (p) and sliding door (a) skin,

- remove and scrap rivet (m) (Detail B, Figure 2) a nd the three rivets (n),

- remove and scrap support (k),

- clean contact surfaces between sliding door (a) s kin and support (k),

- interlay adhesive (1) (not shown in the Figure) b etween sliding door (a) skin and support (2)

as per MTC Work Card 20.06.01.418,

- put support (2) in position using a rivet (3) and three rivets (4) as per

MTC Work Cards 20.03.02.406 and 20.03.02.409,

- delimit work zone Z (intervention zone E, Figure 4) using adhesive tape (5) (not shown in the

Figure),



### CAUTION

WHILE GRINDING, DO NOT DAMAGE THE FIRST

PLIES OF SLIDING DOOR (a) SKIN IN CARBON

FABRIC (DETAIL D, FIGURE 4).

- using abrasive paper (grit size 80 to 240), remov e the finish paint and primer paint on

work zone Z, up to the carbon fiber,

- cut out three square-shaped glass fabric plies (6 ) as per intervention zone E (Figure 4),



### NOTE 2

If the surface of a glass fabric ply (6) enables it , it is possible

to cover several rivet heads with only one glass fa bric ply (6).

# ASB No. EC130-52A009

Revision 0 2010-03-30 Page 10/19

Revision 1 2013-01-25 This document is available on the Internet: www.eurocopter.com/techpub 

### NOTE 3

When installing to the center a glass fabric ply (6 ) on several

rivet heads (4), it is necessary to leave a distanc e of at least

20 mm (.79 in.) between rivet head (4) and the squa re outer

edge.

- apply adhesive compound (7) on the glass fabric p ly/-ies (6) as per

MTC Work Card 20.06.01.411,

- center a glass fabric ply (6) on apparent rivet h eads (4),

- cure the glass fabric ply/-ies (6) in a vacuum ba g as per MTC Work Card 20.03.06.406,

- carry out a surface treatment before painting as per MTC Work Card 20.04.04.401,

- apply a primer paint layer (8) on work zone Z as per MTC Work Card 20.04.05.420,

- apply a finish paint layer as per the color of sl iding door (a) outer skin (Detail D, Figure 4),

- apply grease (9) (Detail C, Figure 3) on Zone X,

- put star (h) in position,

- embody modification 07 3796 as per Paragraph 3.B. 2.d.

3.B.2.d. Embodiment of modification 07 3796 - Reinf orcing the sliding door star support (Figures 5 and 6)

- Reinforce stringer (q) (Section H-H, Figure 6) by means of three carbon fabric plies (13) soaked wit h

adhesive (7).



### NOTE 4

The orientation of carbon fabric plies (13) has no importance

whatsoever.

- Put in position plate (15) on support (k) or (2) pin and center it.

- Put in position angle bracket (16) under stringer (q) and put it against plate (15).

- Secure angle bracket (16) and plate (15) assembly

. - Counter-drill two holes dia 3.3 mm (.13 in.) in a ngle bracket (16), to match plate (15) holes.

- Pin angle bracket (16) and plate (15).

- Counter-drill four holes dia 3.3 mm (.13 in.) in stringer (q), to match angle bracket (16) holes.

- Interlay sealant (17) between angle bracket (16) and plate (15), as per MTC Work Cards 20.05.01.101

and 20.05.01.102.

- Put in position angle bracket (16) on plate (15) by means of two rivets (18) (Detail G, Figure 6).

- By means of four rivets (19) (Section J-J, Figure 6), put in position plate (15) (Section H-H, Figur e 6) and

angle bracket (16) assembly on stringer (q), as per MTC Work Card 20.03.02.406.

- Put in position cotter pin (10) (Detail A, Figure 1) without locking it.

- Connect rods (b), (c) and (j) to star (h), and se cure them by means of pins (d).

- Lock each pin (d) by means of a cotter pin (11).

- Apply grease (12) (Detail B, Figure 2) to zones T , U, V and W.

- Lock star (h) (Detail F, Figure 5) by means of co tter pin (10) (Detail G, Figure 6).

- Mark as per Paragraph 3.C. of this ALERT SERVICE BULLETIN.

# ASB No. EC130-52A009

Revision 0 2010-03-30 Page 11/19

Revision 1 2013-01-25 This document is available on the Internet: www.eurocopter.com/techpub 3.B.3. Final steps (Figure 1)

- Put in position sliding door (a) skin as per AMM Task 25-27-00, 4-2.

- Put in position sliding door (a) as per AMM Task 52-12-00, 4-2.

- Perform operating test of the sliding door as per AMM Task 52-12-00, 6-1.

- Perform aircraft appearance checks as per MTC Wor k Card 20.07.03.408.

- Remove the access means.

3.B.4. Operational procedure on non-installed equip ment

- Retrofit stock of sliding doors as per Paragraph 3.B.2. of this ALERT SERVICE BULLETIN.



### 3.C. IDENTIFICATION

Identification of this document:

Record compliance with this ALERT SERVICE BULLETIN Revision 1 on the helicopter documents.

Identification of modifications on the equipment:

Identify the assembly as per the table below and MT C Work Card 20.08.05.103.

Key Word Former P / N New P/N MOD Marking type

Sliding door

assembly C526S1101051 C526S1101051 + ASB No.

52A009 R1 07 3796 Indelible ink



### 3.D. OPERATING AND MAINTENANCE INSTRUCTIONS

Not applicable.

# ASB No. EC130-52A009

Revision 0 2010-03-30 Page 12/19

Revision 1 2013-01-25 This document is available on the Internet: www.eurocopter.com/techpub



## PAGE LEFT BLANK INTENTIONALLY

# ASB No. EC130-52A009

Revision 0 2010-03-30 Page 13/19

Revision 1 2013-01-25 This document is available on the Internet: www.eurocopter.com/techpub Figure 1: Star support and its environment a

e

11 h c

j

d

e

11

e

11

d d

f

g

10 b s

14

r

s

14 L

# ASB No. EC130-52A009

Revision 0 2010-03-30 Page 14/19

Revision 1 2013-01-25 This document is available on the Internet: www.eurocopter.com/techpub

Figure 2: Star support, star pin and definition of the zones to be greased

a

h k

2

m

3 n

4 n

4

k 1 (See Figure 3)

Zone U

Zone V Zone W Zone T

CM 6240 CM 6240

12 12

# ASB No. EC130-52A009

Revision 0 2010-03-30 Page 15/19

Revision 1 2013-01-25 This document is available on the Internet: www.eurocopter.com/techpub Figure 3: Zones defined for the dye penetrant inspe ction Zone Y k k 1

Zone X (See Figure 2)

CM 115

9

# ASB No. EC130-52A009

Revision 0 2010-03-30 Page 16/19

Revision 1 2013-01-25 This document is available on the Internet: www.eurocopter.com/techpub Figure 4: Installation of glass fabric ply chips on apparent rivet heads Intervention

zones E a

4

p

6

7

8

Work zone Z 

## In tervention zone E

110 mm (4.33 in.) 100 mm

(3.94 in.)ASBNo. EC130-52A009Revision 0 2004-01-16Page 17/19Revision 1 2013-01-25This document is available on the Internet:www.eurocopter.com/techpubFigure 5PRE MODhfgASBNo. EC130-52A009Revision 0 2004-01-16Page 18/19Revision 1 2013-01-25This document is available on the Internet:www.eurocopter.com/techpubPAGE LEFT BLANK INTENTIONALLYASBNo. EC130-52A009Revision 0 2004-01-16Page 19/19Revision 1 2013-01-25This document is available on the Internet:www.eurocopter.com/techpubFigure 6SectionJ-JSectionH-H18POST MOD151716713q191510k ou/or 2