### ALERT SERVICE BULLETIN EC225

Approved under EASA DOA No. 21J.056. 

# 53A020 Page 1/12

2010.02.17

This document is available on t he internet: www.eur ocopter.com/techpub EUROCOPTER

DIRECTION TECHNIQUE SUPPORT

13725 MARIGNANE C EDEX F RANCE 

### CIVIL VERSION(S): LP



# ALERT SERVICE BULLETIN

No. 53A020

SUBJECT : FUSELAGE

Pilot's floor: Absence of floor attachment screws under the pilot's and

copilot's seats

REVISION No. DATE OF APPROVAL DATE OF ISSUE

Revision 0 On: February 15, 2010 2010.02.17

### ALERT SERVICE BULLETIN EC225

Approved under EASA DOA No. 21J.056. 

# 53A020 Page 2/12

2010.02.17 

### 1. PLANNING INFORMATION

1.A. EFFECTIVITY

1.A.1. Helicopters/installed equipment

Helicopters delivered before December 15, 2009, and equipped with FISHER H140 pilot’s and copilot’s

seats MP/N 052010032000D61091 (P/N 704A41120116), install ed by embodiment of MOD 332V820045, or

with EUROCOPTER’s copilot’s seats MP/N 332V08-0180-00.

1.A.2. Non-installed equipment

Pilot’s floors P/N 332A25-1414-01, 332A25- 1414-02 and 332A25-1414-03, delivered before

December 15, 2009.



### 1.B. ASSOCIATED REQUIREMENTS

Not applicable.



### 1.C. REASON

To check the conformity of installation of t he floors located under the pilot and copilot seats.

This ALERT SERVICE BULLETIN will form the subject of an EASA Airworthiness Directive.



### 1.D. DESCRIPTION

Following the installation of an equipment item, a tec hnician noted that some of the screws attaching the

floors under the pilot’s and copilot’s seats were missing.

Investigations have shown that some of the cup washers allowing installation of the countersunk head

screws which attach the pilot’s floor to the frames, were missing.

This installation configuration is specific to FISHER H140 seats.

The absence of these attachment screws can lead to r educed strength of the seat attachments in the event

of a crash.

Consequently, EUROCOPTER renders the check of the p ilot’s floor attachments, and if necessary, their

return to conformity, mandatory.

### ALERT SERVICE BULLETIN EC225

Approved under EASA DOA No. 21J.056. 

# 53A020 Page 3/12

2010.02.17 1.E. COMPLIANCE

EUROCOPTER renders compliance with th is ALERT SERVICE BULLETIN mandatory.

1.E.1. Compliance at the works

1.E.1.a. On helicopters/installed equipment

Not applicable.

1.E.1.b. On non-installed equipment

Not applicable.

1.E.2. Compliance in service: By the operator

1.E.2.a. On helicopters/installed equipment

Comply with paragraph 2. (except for paragraph 2.B.4. ) within 85 flying hours following receipt of this

ALERT SERVICE BULLETIN, issued on the date indicated at the foot of the page.

1.E.2.b. On non-installed equipment

Before installation and at the latest within 6 months following receipt of this ALERT SERVICE BULLETIN,

issued on the date indicated at the foot of the page, comply with paragraph 2.B.4.



### 1.F. APPROVAL

1.F.1. Approval of modifications

Not applicable.

1.F.2. Approval of the Service Bulletin

The technical information contained in this ALERT SERVICE BULLETIN Revision 0 was approved

on February 15, 2010 under the authority of EASA Desi gn Organisation Approval No. 21J.056 for civil

version helicopters subject to an Airworthiness Certificate.



### 1.G. MANPOWER

1.G.1. Qualification

EUROCOPTER recommends that compliance with this ALERT SERVICE BU LLETIN is ensured by

personnel qualified as follows:

Qualification: 1 aircraft structure technician.

### ALERT SERVICE BULLETIN EC225

Approved under EASA DOA No. 21J.056. 

# 53A020 Page 4/12

2010.02.17 1.G.2. Time for the operations

The times for the operations are given for info rmation only and for a standard configuration:

Times for the operations: approxim ately 1 hour for the check.

approximately 2 hours to install the screws.

approximately 1 day to remove and inst all the seats (time for both seats).

1.G.3. Estimated helicopter grounding time

Approximately 2 days if cup wa shers are to be installed.



### 1.H. WEIGHT AND BALANCE

Not applicable.



### 1.I. EFFECT ON ELECTRICAL LOADS

Not applicable.



### 1.J. SOFTWARE MODIFICATION EMBODIMENT RECORD

Not applicable.



### 1.K. REFERENCES

The documents required for compliance with th is ALERT SERVICE BULLE TIN are as follows:

MMA: 25-11-02-051: Removal - installation (seats).

MTC: 20.02.05.404: Assemb ling by bolts and nuts.

20.06.01.101: General rules for bonding with adhesives.

20.06.01.407: Bonding with adhesives: "EC2216" cement.



### 1.L. OTHER DOCUMENTS AFFECTED

Not applicable.



### 1.M. TOOLING AFFECTED

Not applicable.



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

Not applicable.

### ALERT SERVICE BULLETIN EC225

Approved under EASA DOA No. 21J.056. 

# 53A020 Page 5/12

2010.02.17 

### 2. ACCOMPLISHMENT INSTRUCTIONS

2.A. GENERAL

Not applicable.



### 2.B. OPERATIONAL PROCEDURE

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

- Install the access equipment.

- Remove inspection doors (d) (Figure 1).

2.B.2. Procedure (Figures 1 to 4)

2.B.2.a. Check (Figures 1 to 3)

- Access via inspection doors (d), and using a light s ource and a mirror, check the presence of screws (a)

and nuts (e):

. 4 screws (a) and 4 nuts (e) on each side of the copilot’s seat mount (Figure 2),

. 1 screw (a) and 1 nut (e) on each side of the pilot’s seat mount (Figure 3).

Interpretation of the results :

- If screws (a) and nuts (e) are all present (Figures 2 and 3):

. perform the final steps as per paragraph 2.B.3.

- If at least one screw (a) or one nut (e) is missing (Figures 2 and 3):

. comply with paragraph 2.B.2.b.

2.B.2.b. Return to conformity (Figures 2 to 4)

- Remove the seat concerned by the missing scr ew(s)/nut(s) as per Sub-task 25-11-02-021-001 of

MMA Task 25-11-02-051.

- Remove mount (b) after identifying the position of the attachment assemblies (Figures 2 and 3):

. Recover any nuts and washers under the floors via inspection doors (d).

- Check the presence of cup washers (c) (Figure 4).

- If cup washers are missing, install cup washers (1) (Figure 4):

. countersink the existing hole using a 100° count ersink cutter, to a depth of 2.2 mm (.087 in.),

. prepare the surface as per MTC Work Card 20.06.01.101,

. bond cup washer (1) with adhesive (5) as per MTC Work Card 20.06.01.407.



### NOTE

Curing time:

- 24 hours at ambient temperature,

- 4 hours at 60°C.

### ALERT SERVICE BULLETIN EC225

Approved under EASA DOA No. 21J.056. 

# 53A020 Page 6/12

2010.02.17 - Install screw (2), washer (3) and nut (4) (Figures 2 and 3).

- Torque tighten as per MTC Work Card 20.02.05.404.

- Install mount (b) in accordance with the ident ification when it was removed (Figures 2 and 3).

- Install the seats as per Sub-ta sk 25-11-02-421-001 of MMA Task 25-11-02-051.

2.B.3. Final steps (Figure 1)

- Install inspection doors (d) (Figure 1).

- Remove the access equipment.

2.B.4. Operational procedure on non-installed equipment (Figure 4)

- Check the presence of cup washers (c) (Figure 4).

- If cup washers are missing, install cup washers (1) (Figure 4):

. countersink the existing hole using a 100° count ersink cutter, to a depth of 2.2 mm (.087 in.),

. prepare the surface as per MTC Work Card 20.06.01.101,

. bond cup washer (1) with adhesive (5) as per MTC Work Card 20.06.01.407.



### 2.C. IDENTIFICATION

Record compliance with this ALERT SERVI CE BULLETIN in the helicopter documents.



### 2.D. OPERATING AND MAINTENANCE INSTRUCTIONS

Not applicable.

### ALERT SERVICE BULLETIN EC225

Approved under EASA DOA No. 21J.056. 

# 53A020 Page 7/12

2010.02.17 Figure 1: Inspection doors 

### d

### ALERT SERVICE BULLETIN EC225

Approved under EASA DOA No. 21J.056. 

# 53A020 Page 8/12

2010.02.17 Figure 2: Floor on copilot's side 

### b a

c

e

1

2

3

4

5

a

c

e

1

2

3

4

5

### ALERT SERVICE BULLETIN EC225

Approved under EASA DOA No. 21J.056. 

# 53A020 Page 9/12

2010.02.17 Figure 3: Floor on pilot's side 

### a

c

e

1

2

3

4

5

b

### ALERT SERVICE BULLETIN EC225

Approved under EASA DOA No. 21J.056. 

# 53A020 Page 10/12

2010.02.17 Figure 4: Installing a cup washer 

### c

1

5

2.2 mm (.087 in.) 

### EC2216

a

2 e

4 3

### ALERT SERVICE BULLETIN EC225

Approved under EASA DOA No. 21J.056. 

# 53A020 Page 11/12

2010.02.17 

### 3. MATERIAL INFORMATION

3.A. MATERIAL: PRICE AND AVAILABILITY

3.A.1. Cost

The kits and/or components will be delivered free of charge for all operator orders placed

by September 30, 2010.

3.A.2. Availability

The kits and/or components will be delivered on the operator's order.



### 3.B. INFORMATION CONCERNING INDUSTRIAL SUPPORT

Not applicable.



### 3.C. MATERIAL REQUIRED FOR EACH HELICOPTER/ENGINE/COMPONENT

3.C.1. Kits or components to be ordered for one helicopter or one assembly

Material P/N Qty Item Key Word Former P/N Instructions

EN4201-050 AR 1 Cup washer -

22252TK050020X AR 2 100° countersunk head screw -

23111CA050 AR 3 Flat washer -

ASN52320BH050N AR 4 Nut -

3.C.2. Products to be ordered separately

Material P/N Qty Item Key Word

DHN1-019-0135 (EC2216) AR 5 Epoxy adhesive

The materials identified by an asterisk "*" or required fo r compliance with the Tasks and/or Work Cards listed in

paragraph 1.K., can be ordered from the INTERTURBINE company:

Website: http://www.itlogistics.de

Phone: +49.41.91.809.300

AOG: +49.41.91.809.444.

### ALERT SERVICE BULLETIN EC225

Approved under EASA DOA No. 21J.056. 

# 53A020 Page 12/12

2010.02.17 3.D. PROCUREMENT CONDITIONS

Order the required quantity (unless otherwise specified)

from

EUROCOPTER

Etablissement de Marignane

Direction Ventes et Relations Client

ECR

13725 MARIGNANE CEDEX

FRANCE



### NOTE 1

For ALERT SERVICE BULLETINS, order by:

Telex: HELICOP 410 969F

Fax: +33 (0)4.42.85.99.96.



### NOTE 2

On the purchase order, please specify the mode of transport,

the destination, and the serial numbers of the helicopters to be

modified.



### 4. APPENDIX

Not applicable.