ALERT SERVICE BULLETIN EC225 

Approved under EASA DOA No. 21J.056. 53A020 Page 1/12

 2010.02.17

 

This document is available on the internet: www.eurocopter.com/techpub 

 EUROCOPTER

DIRECTION TECHNIQUE SUPPORT

13725 MARIGNANE CEDEX FRANCE 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), installed 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 the 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 technician 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 reduced strength of the seat attachments in the event 

of a crash.

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

return to conformity, mandatory. 
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1.E. COMPLIANCE 

EUROCOPTER renders compliance with this 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 Design 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 BULLETIN is ensured by 

personnel qualified as follows: 

Qualification: 1 aircraft structure technician. 
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1.G.2. Time for the operations 

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

Times for the operations: approximately 1 hour for the check. 

approximately 2 hours to install the screws. 

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

1.G.3. Estimated helicopter grounding time

Approximately 2 days if cup washers 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 this ALERT SERVICE BULLETIN are as follows: 

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

MTC: 20.02.05.404: Assembling 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. 
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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 source 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 screw(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° countersink 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 

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- 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 identification when it was removed (Figures 2 and 3). 

- Install the seats as per Sub-task 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° countersink 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 SERVICE BULLETIN in the helicopter documents. 

2.D. OPERATING AND MAINTENANCE INSTRUCTIONS 

Not applicable. 
 ALERT SERVICE BULLETIN EC225 

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Figure 1: Inspection doors 

d 
 ALERT SERVICE BULLETIN EC225 

Approved under EASA DOA No. 21J.056. 53A020 Page 8/12

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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

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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

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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 for 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 

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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.