eurocopter 

an EADS Company 

ALERT SERVICE BULLETIN AS332 

EUROCOPTER 

DIRECTION TECHNIQUE SUPPORT 

13725 MARIGNANE CEDEX FRANCE CIVIL VERSION(S): L2 

ALERT SERVICE BULLETIN 

No. 05.00. 71 

SUBJECT: TIME LIMITS -MAINTENANCE CHECKS 

Life Raft- Inflation Cylinder 

ATA: 25 

L--------------------------------------------------------------··--

REVISION No. DATE OF APPROVAL 

Revision 0 On: July 31, 2007 

Approved under EASA DOA No. 21J .056. 05.00.71 

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

DATE OF ISSUE 

2007.07.31 

Page 1/14 

2007.07.31 
eurocopter 

an EADS Company 

ALERT SERVICE BULLETIN AS332 

1. PLANNING INFORMATION 

1.A. EFFECTIVITY 

1.A.1. Helicopters/Installed equipment 

Helicopters equipped with life raft P/N 0005104 7 or P/N 00051048. 

1.A.2. Non-installed equipment 

Life raft inflation cylinder P/N 41918001 . 

Life raft P/N 00051 04 7. 

Life raft P/N 00051048. 

1.8. ASSOCIATED REQUIREMENTS 

Not applicable. 

1.C. REASON 

To prevent internal damage to the inflation cylinder due to interference between the plunger tube and the 

internal skin of the infla~ion cylinder. 

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

1.D. DESCRIPTION 

EUROCOPTER has received a report of wear on the internal skin of the inflation cylinder. This wear was 

revealed by a borescope inspection during a scheduled maintenance operation. 

The plunger tube end is fitted with a metal end-fitting that bears against the internal surface of the cylinder. 

Vibrations generated by the helicopter are causing wear on the internal skin of the cylinder, which can cause 

the internal pressure of the cylinder to drop. In this case, life raft inflation would no longer be possible. 

Pending a modification to the inflation cylinder, EUROCOPTER renders compliance with this ALERT 

SERVICE BULLETIN mandatory. 

Approved under EASA DOA No. 21J.056. 05.00.71 Page 2/14 

2007 .07.31 
ALERT SERVICE BULLETIN AS332 

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: Not applicable. 

1.E.1.b. On non-installed equipment: Not applicable. 

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

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

From receipt of this ALERT SERVICE BULLETIN, issued on the date indicated at the foot of the page: 

- For helicopters fitted with inflation cylinders having logged 2,500 flying hours or more, since last overhaul 

(TSO) or since new (TSN): 

. Comply with paragraph 2. of this ALERT SERVICE BULLETIN at the latest within 100 flying hours. 

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

- For inflation cylinders having logged 2,500 flying hours or more, since last overhaul {TSO) or since new 

(TSN): 

. Comply with paragraph 2. of this ALERT SERVICE BULLETIN before installation on a helicopter. 

1.F. APPROVAL 

Approval is limited to civil version helicopters subject to an Airworthiness Certificate. 

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

on July 31 , 2007 under the authority of EASA Design Organisation Approval No. 21 J.056. 

Approved under EASA DOA No. 21J.056. 05.00.71 Page 3/14 

2007.07.31 
eurocopter 

an EADS Company 

ALERT SERVICE BULLETIN AS332 

1.G. MANPOWER 

Qualification: 1 mechanic. 

Time for the operations: Approximately 1 hour and 30 minutes for one cylinder. 

1.H. WEIGHT AND BALANCE 

Not applicable. 

1.1. EFFECT ON ELECTRICAL LOADS 

Not applicable. 

1.J. SOFTWARE MODIFICATION EMBODIMENT STATE 

Not applicable. 

1.K. REFERENCES 

MMA: 25-66-01-821: Adjustment- Ground testing of the life raft inflation control 

MTC: 20.02.07.1 01: Electrical bonding - General 

20.02.07.401: Electrical bonding- Bonding procedure 

CMM: 25-60-96. 

1.L. OTHER DOCUMENTS CONCERNED 

The Maintenance Program (PRE) and the Aircraft Maintenance Manual (MMA) will be updated 

subsequently. 

1.M. TOOLING CONCERNED 

Not applicable. 

1.N. INTERCHANGEABILITY AND MIXABILITY OF PARTS 

Not applicable. 

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ALERT SERVICE BULLETIN AS332 

2. ACCOMPLISHMENT INSTRUCTIONS 

2.A. GENERAL 

-The operations specified in Appendix 1 are described for the inflation cylinder installed in the LH sponson 

of the helicopter and are the same for the inflation cylinder installed in the RH sponson. 

2.8. OPERATIONAL PROCEDURE 

2.B.1. Preliminary steps 

- Install the access equipment. 

- Do the operations described in Appendix 1 paragraphs 1. and 2. 

2.B.2. Procedure 

- Remove the inflation cylinder (d) in compliance with Appendix 1 paragraph 3.1. 

- Return the inflation cylinder {d) to an approved workshop for a borescope inspection in accordance with 

CGA C.6.2. standard (Revision 2005). 

- Install the inflation cylinder {1) in compliance with Appendix 1 paragraph 3.2. 

2.B.3. Tests 

- Do the operations specified in Appendix 1 paragraph 3.3. 

2.B.4. Final steps 

- Do the operations specified in Appendix 1 paragraph 4. 

- Remove the access equipment. 

2.C. IDENTIFICATION 

Record initial compliance with this ALERT SERVICE BULLETIN in the helicopter documents. 

Record compliance with this ALERT SERVICE BULLETIN on the log card of the inflation cylinder. 

2.D. OPERATING AND MAINTENANCE INSTRUCTIONS 

2.0.1. Operating Instructions: 

Not applicable. 

Approved under EASA DOA No. 21J .056. 05.00.71 Page 5/14 

2007.07.31 
eurocopter 

an EADS Company 

ALERT SERVICE BULLETIN AS332 

2.0.2. Maintenance Instructions 

Pending update of the Maintenance Program (PRE) for life raft inflation cylinders P/N 41918001 , 

EUROCOPTER recommends the following maintenance procedure: 

Description, Documentation Part Number TL Limit 

CYLINDER 41918001 TBO 2500H //3Y 

3Y: Time limit since new. 

Overhaul and proof test the cylinders. 

Time limit with no tolerance. 

Rece1pt of the above Ma1ntenance Program (PRE) update w1ll cancel compliance w1th th1s ma1ntenance 

instruction. 

CL 

* 

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2007.07.31 
eurocopter 

an EADS Company 

ALERT SERVICE BULLETIN AS332 

3. MATERIAL INFORMATION 

3.A. MATERIAL: COST- AVAILABILITY 

3.A.1 . Cost 

Not applicable. 

3.A.2. Availability 

Not applicable. 

3.8. INFORMATION CONCERNING INDUSTRIAL SUPPORT 

Not applicable. 

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

3.C.1. Kit(s) or component(s) to be ordered for one helicopter or one assembly 

Material 

Part Number 

41918001 

Qty Item 

NR 

3.C.2. ltem(s) to be ordered separately 

Not applicable. 

Approved under EASA DOA No. 21J .056. 

Key Word Former Part Number 

Inflation cylinder 41918001 

05.00.71 

Instructions 

Return 

Page 7/14 

2007.07.31 
ALERT SERVICE BULLETIN AS332 

3.0. PROCUREMENT CONDITIONS 

Order the required quantity (unless otherwise specified) 

from 

EUROCOPTER 

Etablissement de Marignane 

Direction Ventes et Relations Client 

ECR 

13725 MARIGNANE CEDEX 

FRANCE 

NOTE1 

For ALERT SERVICE BULLETINS, order by: 

4. APPENDIX 

Telex: HELICOP 410 969F 

Fax: +33 (0)4 42 85 99 96 

NOTE2 

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

destination and the serial numbers of the heiicopters to be 

modified. 

Appendix 1 describing the procedure for removing/installing life raft inflation cyl inders. 

Approved under EASA DOA No. 21J .056. 05.00.71 Page 8/14 

2007.07.31 
ALERT SERVICE BULLETIN AS332 

Removal/Installation of the life raft inflation cylinder 

1. EQUIPMENT REQUIRED 

1.1. Special tools 

-Safety pin (c) P/N 40247001 (from the aircraft tool kit). 

1.2. Materials 

- Snap wire, 0.3 mm (0.012 in) diameter, P/N 23321 . 

- Petrolatum AIR 3565/A. 

- Nylon cord, capacity: 180 kg (z) (See CMM 25-60-96, P/N 02226005). 

-Adhesive tape. 

1.3. Routine replacement parts 

None. 

1.4. Applicable documents 

- Aircraft Maintenance Manual (MMA): 25-66-01-821 Adjustment - Ground testing of the life raft inflation control. 

-Standard Practices Manual (MTC): 20.02.07.101 Electrical bonding- General. 

20.02.07.401 Electrical bonding - Bonding procedure 

- Component Maintenance Manual (CMM): 25-60-96. 

2. PRELIMINARY STEPS 

- Cut the 0.3 mm (0.012 in) snap wire of the frangible covers (a) (Figure 1 ). 

-Remove the frangible covers (a) from the release latches (b). 

-Unlock the cover (o). 

- Disconnect the bonding braid between the cover (o) and the sponson. 

- Remove the cover (o). 

- Install the safety pin (c) on the firing head (f). 

-Lift the upper flap (p) (Figure 2) and attach it to the sponson with adhesive tape. 

Put rags between the life raft and the compartment walls to avoid 

dropping objects (washer, pin, etc.) under the life raft. 

3. PROCEDURE 

3.1. Removing the cyl inder 

- Remove the cotter pin (m) (Figure 1) and the washer (1). 

- Note the position of the bellcrank pin (k). 

- Remove the bellcrank pin (k) and clear the firing cable (n) from the bellcrank (g). 

-Attach the firing cable (n) to the firing head (f) with adhesive tape. 

- Disconnect the inflation hose (x) (Figure 2) from the firing head (f). 

- Blank off the firing head (f), and the inflation hose (x) with one blank each. 

- Remove the short strap (r) and the long strap (s). 

Appendix 1 

Approved under EASA DOA No. 21J.056. 05.00.71 Page 9/14 

2007.07.31 
eurocopter 

an EADS Company 

ALERT SERVICE BULLETIN AS332 

- Hold the pin (h) (Figure 1 ), then pivot the bellcrank (g) so that the rod U) can be removed. 

- Remove the washer (i), the pin (h) and the upper part of the attachment clamp (e). 

- Remove the cylinder (d). 

- Mark the serial number of the life raft on a label and affix this label to the cylinder {d). 

- Remove the firing head (f) from the cylinder {d), refer to CMM 25-60-96. 

3.2. Installing the cylinder 

-Check that the safety pin (c) is in place on the cylinder (1) firing head. 

-Install the firing head (f) on the cyl inder (1 ), refer to CMM 25-60-96. 

- Apply S-7 43 petrolatum to the surface that comes into contact with the bottom of the cylinder (1 ). 

- If not fitted , position and attach self-gripping "Velcro" hook/loop fasteners on the cylinder (1 ). 

-Attach the long strap (s) on the cylinder (1 ). 

The mooring lines (u) (Figure 2) must be positioned behind the 

cylinder (1) . 

-If necessary, use adhesive tape to attach the mooring lines (u) to the upper flap (p). 

- Put the cylinder (1) and the long strap (s) in the compartment. 

-Attach the long strap (s) to the self-gripping "Velcro" hook/loop fastener of the lower flap (v). 

-Install the flange on the cylinder {1 ), level with attachment clamp (e). 

-Install the upper part of clamp (e) 

- Install the washer (i) (Figure 1 ). 

One of the edges of washer (i) is rounded. The washer must be 

positioned in such a way that the rounded edge is visible. 

- Pivot the bellcrank (g) in order to insert the rod U) into the pin {h). 

- Remove the blanks from the firing head (f) and from the inflation hose (x) (Figure 2). 

- Remove the adhesive tape from the pin (h) (Figure 1 ). 

- Connect the inflation hose (x) (Figure 3) to the firing head (f), then torque tighten it as specified on 

Figure 3. 

-Attach the strap (w) around the firing head (f) using Nylon cord (z) (capacity 180 kg). 

- Take the short strap (r) (Figure 2) and attach one of its ends to the lower flap (v) and the other end to 

the upper part of the cylinder (1 ). 

-Remove the adhesive tape (if fitted) attaching the mooring lines (u) to the upper flap (p). 

3.3. Tests 

Run the tests in compl iance with Task 25-66-01-821 paragraph 3.2. 

Appendix 1 

Approved under EASA DOA No. 21J .056. 05.00.71 Page 10/14 

2007.07.31 
eurocopter 

an EADS Company 

ALERT SERVICE BULLETIN AS332 

4. FINAL STEPS 

- Remove the rags which were put in place in the compartment. 

-Remove the adhesive tape from the upper flap (p) (Figure 2) and fold it over. 

- Check that the compartment handle (y) is correctly positioned. 

- Remove the safety pin (c) (aircraft tool kit) (Figure 1 ). 

-Offer up the cover (o). 

- Check that, when full , the fabric container (q) (Figure 2) does not touch the internal face of the cover (o) 

(Figure 1 ). 

-Connect the electrical bonding braid as per MTC 20.02.07.1 01 and MTC 20.02.07.401 . 

- Lock the cover (o). 

-Install the frangible covers (a) on the release latches (b) of the cover (o). 

- Install the 0.3 mm (0.012 in) diameter snap wire on the frangible protections (a). 

Appendix 1 

Approved under EASA DOA No. 21J .056. 05.00.71 Page 11/14 

2007.07.31 
a '\ ) / 

\~ ~~...:-- ' ------

0 

f 

c ~ 

k 

I 

m 

J2 

' 

Approved under EASA DOA No. 21J .056. 

n 

i e 

Figure 1 

Appendix 1 

05.00.71 

ALERT SERVICE BULLETIN AS332 

d 

1 

g 

h 

b 

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eurocopter 

an EADS Company 

f 

r 

X 

w 

Figure 2 

Appendix 1 

Approved under EASA DOA No. 21J .056. 05.00.71 

ALERT SERVICE BULLETIN AS332 

p 

Page 13/14 

2007.07.31 
20,34 N.m 

15 lbf.ft 

f 

Figure 3 

Appendix 1 

Approved under EASA DOA No. 21J .056. 05.00.71 

ALERT SERVICE BULLETIN AS332 

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