ASB No. EC155-25A128

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Civil version(s): B, B1

ALERT SERVICE BULLETIN

SUBJECT: EQUIPMENT AND FURNISHINGS - Life raft installation

Improved external life raft deployment controls

Corresponds to modification 365A084711.01

Revision No. Date of issue

Revision 0 2014-09-29

Revision 1 2015-02-02

Summary:

Functional improvement of the external life raft deployment controls in order to ensure optimum life raft deployment 

in the event of ditching.

Reason for last Revision:

To add life raft Part Number (MP/N) 245434-0 to paragraph 1.A. Effectivity.

Compliance:

Airbus Helicopters renders compliance with this ALERT SERVICE BULLETIN mandatory.

For the attention of
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1. PLANNING INFORMATION

1.A. EFFECTIVITY

1.A.1. Helicopters/installed equipment

Helicopters equipped with optional AERAZUR TYPE SR10 external life rafts:

- life raft, Part Number (MP/N) 245431-0 (former cylinder without beacon installation provisions),

- life raft, Part Number (MP/N) 245431-1 (carbon cylinder without beacon installation provisions),

- life raft, Part Number (MP/N) 245434-0 (metal cylinder with beacon installation provisions),

- life raft, Part Number (MP/N) 245434-1 (carbon cylinder with beacon installation provisions).

1.A.2. Non-installed equipment

Not applicable.

1.B. ASSOCIATED REQUIREMENTS

Not applicable.

1.C. REASON

Revision 0:

Airbus Helicopters has been informed that, following installation of a new life raft on a helicopter, the travel of 

the life raft deployment control could not be adjusted as stated in the Maintenance Manual.

Technical analysis revealed that the position of the life raft inflation cylinder may slacken the deployment 

control cable.

This anomaly in the life raft deployment control linkage is due to the varying position of the inflation cylinder 

inside the bag which contains the life raft, and to the varying position of the bag inside the container, related 

to installation-removal of the optional equipment, calendar overhauls, life raft storage, shock impacts, in-flight 

vibrations, etc. Cylinder displacement may induce insufficient travel of the deployment control for life raft 

inflation.

Airbus Helicopters has developed modification 365A084711.01 which ensures sufficient travel of the life raft 

deployment control cable in all positions of the inflation cylinder. Although no case of non-deployment of a 

life raft has been reported, Airbus Helicopters makes compliance with this ALERT SERVICE BULLETIN 

mandatory.

Revision 1:

The purpose of Revision 1 of this ALERT SERVICE BULLETIN is to add life raft Part Number 

(MP/N) 245434-0 to paragraph 1.A. Effectivity.

Revision 1 affects compliance with Revision 0 of this ALERT SERVICE BULLETIN only for helicopters 

equipped with life raft Part Number (MP/N) 245434-0.
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1.D. DESCRIPTION

Compliance with this ALERT SERVICE BULLETIN consists in:

- Opening the containers of the optional life rafts.

- Improving the life raft deployment controls.

- Returning the helicopter to flight configuration.

1.E. COMPLIANCE

1.E.1. Compliance at the works

Helicopters/installed equipment:

Not applicable.

Non-installed equipment:

Not applicable.

1.E.2. Compliance in service

The work on the helicopter is to be performed by the operator.

Helicopters/installed equipment:

- For helicopters equipped with life raft Part Numbers (MP/N) 245431-1, 245431-0, 245434-1:

If the helicopter is used for missions which require life rafts, comply with paragraph 3.B. of this ALERT 

SERVICE BULLETIN within 110 flying hours following receipt of this ALERT SERVICE BULLETIN 

Revision 0, issued on the date indicated at the bottom of the page.

In order to ensure full compliance of the fleet within a controlled calendar time limit, Airbus Helicopters makes 

compliance with paragraph 3.B. of this ALERT SERVICE BULLETIN mandatory, no later than within 

6 months following receipt of this ALERT SERVICE BULLETIN Revision 0, issued on the date indicated at 

the bottom of the page.

- For helicopters equipped with life raft Part Number (MP/N) 245434-0:

If the helicopter is used for missions which require life rafts, comply with paragraph 3.B. of this ALERT 

SERVICE BULLETIN within 110 flying hours following receipt of this ALERT SERVICE BULLETIN 

Revision 1, issued on the date indicated at the bottom of the page.

In order to ensure full compliance of the fleet within a controlled calendar time limit, Airbus Helicopters makes 

compliance with paragraph 3.B. of this ALERT SERVICE BULLETIN mandatory, no later than 

within 6 months following receipt of this ALERT SERVICE BULLETIN Revision 1, issued on the date 

indicated at the bottom of the page.

Non-installed equipment:

Not applicable.
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1.F. APPROVAL

Approval of modifications:

The information or instructions relate to modification 365A084711.001 which was approved 

on September 23, 2014 by EASA for helicopters of civil versions subject to an Airworthiness Certificate.

Approval of this document:

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

on September 29, 2014 under the authority of EASA Design Organization Approval No. 21J.056 for 

helicopters of civil versions subject to an Airworthiness Certificate.

The technical information contained in this ALERT SERVICE BULLETIN Revision 1 was approved 

on January 29, 2015 under the authority of EASA Design Organization Approval No. 21J.056 for helicopters 

of civil versions subject to an Airworthiness Certificate.

1.G. MANPOWER

For compliance with this ALERT SERVICE BULLETIN, Airbus Helicopters recommends the following 

personnel qualifications:

Qualification: 1 Mechanical Technician.

The time for the operations is given for information purposes, for a standard configuration.

Time for the operations: Approximately 4 hours.

1.H. WEIGHT AND BALANCE

Not applicable.

1.I. EFFECT ON ELECTRICAL LOADS

Not applicable.

1.J. SOFTWARE MODIFICATION EMBODIMENT RECORD

Not applicable.
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1.K. REFERENCES

The documents required for compliance with this ALERT SERVICE BULLETIN are as follows:

Aircraft Maintenance Manual (AMM): 

- AMM: 25-69-01-062: Removal - Installation - Life raft container

- AMM: 25-69-01-063: Removal - Installation - Life raft

- AMM: 25-69-01-721: Functional Tests - Life raft jettison control system

Standard Practices Manual (MTC):

- MTC: 20.02.05.404: Joining - Joining by bolts and nuts

1.L. DOCUMENTS AFFECTED

Airbus Helicopters will modify the Aircraft Maintenance Manual (AMM) and the Illustrated Parts Catalog (IPC) 

with respect to this ALERT SERVICE BULLETIN. 

These documents will be issued subsequently.

1.M. INTERCHANGEABILITY OR MIXABILITY OF PARTS

Not applicable.
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2. MATERIAL INFORMATION

2.A. MATERIAL: PRICE - AVAILABILITY - PROCUREMENT

Price

For any information concerning the kits and/or components, contact the Airbus Helicopters Network Sales 

and Customer Relations Department.

Availability

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

Procurement conditions

Order the required quantity (unless otherwise specified)

from

Airbus Helicopters

Etablissement de Marignane

Direction Ventes et Relations Client (ECR)

13725 MARIGNANE CEDEX

France

NOTE 1

On the purchase order, please specify the mode of 

transport, the destination and the serial numbers of the 

helicopters 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/COMPONENT

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

Designation Qty New P/N Item Former 

 P/N → Instruction

Clip 2 365A844174.20 1 / /

Sleeve 2 365A844174.21 2 / /

Sheath 2 365A084711.AA 3 / /

Nut A/R ASN52320BH040N 4 / /
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3. ACCOMPLISHMENT INSTRUCTIONS

3.A. GENERAL

Not applicable.

3.B. OPERATIONAL PROCEDURE

The modification procedure is described only for the RH life raft deployment control. Comply with the same 

operating procedure on the LH life raft.

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

- Install the access equipment for external life rafts.

HANDLE THE LIFE RAFT (b) CONTAINER (a) 

WITH CARE TO PREVENT OPERATION OF THE 

CYLINDER (d) CONTROL (FIGURE 1).

- Open the container (a) of the RH life raft (b) as per AMM Task 25-69-01-062

(Details A and B, Figure 1).

- Remove the blank (c) (Detail A, Figure 1).

BEFORE ANY WORK ON THE LIFE RAFT (b) 

CONTAINER (a), INSTALL THE PIP PIN (e),

FITTED WITH ITS PENNANT (f), ON THE 

CYLINDER HEAD (d).

- Take the pip pin (e) and its pennant (f) in the pocket located on the cover hatch (g)

(Area Z, Detail B, Figure 1) or in the location provided inside the container (a).

- Open the cover hatch (g) to gain access to the cylinder head (d) (Detail B, Figure 1).

- Install the pip pin (e), fitted with its pennant (f), on the cylinder head (d) (Detail B, Figure 1).

WARNING

WARNING
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3.B.2. Installation of the sheath kit (Figures 2 to 5)

- Remove and check the nut (h) as per MTC Work Card 20.02.05.404 and discard it, if necessary 

(Detail N, Figure 5).

- Remove the washers (j), screw (k) and spacer (m) (Detail N, Figure 5).

- Remove the connection kit (n) from the finger grip clip (p) (Details D and E, Figure 2).

- Loosen and separate the 2 parts of the connection kit (n).

- Disconnect the cylinder control cable (q) from the connection kit (n) (Detail E, Figure 2).

NOTE 1

The connection kit (n) can be reassembled and left in place 

on the helicopter control cable (r).

- Perform a functional test of the life raft deployment control as per AMM Task 25-69-01-721.

- Position the 126 mm ± 1 mm (4.92 in; 5 in.) long sheath (3) on the head of the cylinder (d) without inserting 

the cylinder control cable (q) (Detail F, Figure 3).

- Estimate the bend radius before installing the sheath (3) on the cylinder control cable (q).

- In order to facilitate installation, manipulate the sheath (3) by hand to give it the required bend radius.

CAUTION

DO NOT PINCH OR BEND THE SHEATH (3) 

DURING INSTALLATION. IT IS MANDATORY TO 

REPLACE ANY PINCHED OR BENT SHEATH 

WITH A NEW SHEATH.

- Install the clip (1) and sleeve (2) on the sheath (3) as per Detail H of Figure 3.

NOTE 2

The clip (1) and sleeve (2) are installed on the sheath (3) 

with a functional clearance. They slide on the sheath (3).

- Insert the cylinder control cable (q) into the sheath (3) equipped with the clip (1) and sleeve (2).

- Lock the clip (1) on the head of cylinder (d), starting on the side pointing to the cylinder (s) as per Details G 

and H of Figure 3.

- Connect the cylinder control cable (q) and helicopter control cable (r) using the connection kit (n) as per 

Detail M of Figure 4. 

- Torque-tighten the connection kit (n) as per Detail M of Figure 4.

CAUTION

THE BARREL HEAD OF THE CONNECTION KIT 

(n) MUST BE INSTALLED ON THE TRACTION 

SIDE OF THE CYLINDER CONTROL CABLE (q) 

(DETAIL M, FIGURE 4).

- Install the connection kit (n) in the finger grip clip (p) (Detail M, Figure 4).

- Install the spacer (m), screw (k), washers (j) and nut (h) or (4) (Detail N, Figure 5).

- Ensure that the cylinder control cable (q) is positioned between the pulley of the cable guide (t) and spacer 

(m) as per Detail N of Figure 5.

- Torque-tighten the nut (h) or (4) as per MTC Work Card 20.02.05.404.

- Ensure that the sheath (3) comes against the bottom of the housings of the clip (1) and sleeve (2).
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- Ensure that the clearance (J1) between the sleeve (2) and the cable guide (t) is between 6 mm and 26 mm 

(.236 in. to 1.023 in.) as per Cross-section L-L and Detail M of Figure 4.

- Check the length (L1) 110 mm ± 10 mm (3.937 in. ; 4.724 in.) of the helicopter control cable (r) as per AMM 

Task 25-69-01-063 (Detail D, Figure 2).

NOTE 3

The sheath kit installation may be slightly curved and the 

cylinder control cable (q) may be slack without affecting 

operation (Details N and O, Figure 5).

3.B.3. Final steps (Figures 1 and 5)

- Remove the pip pin (e) and its pennant (f) (Detail B, Figure 1).

- Close the cover hatch (g) which enabled access to the cylinder head (d) (Detail O, Figure 5).

CAUTION

DO NOT PINCH OR BEND THE SHEATH (3) OF 

THE CYLINDER CONTROL CABLE (q) WHEN 

CLOSING THE COVER HATCH (g) (DETAIL O, 

FIGURE 5).

- Put the pip pin (e) and its pennant (f) in the pocket located on the cover hatch (g) or in the location provided 

inside the container (a) (Detail B, Figure 1).

- Install the blank (c) (Detail A, Figure 1).

- Close the container (a) as per AMM Task 25-69-01-062.

- Remove the access equipment for external life rafts.

3.C. IDENTIFICATION

Identification of this document:

Record compliance with this document, with the revision number, in the helicopter documents.

Identification of modifications on the documentation:

Record the embodiment of modification 365A084711.01 in the helicopter documents.
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3.D. OPERATING AND MAINTENANCE INSTRUCTIONS

Operating instructions:

Not applicable.

Maintenance instructions:

Remove and store the sheath kit before sending the life raft or cylinder for scheduled maintenance and/or 

repair.

CAUTION

INSTALL THE SHEATH KIT WHEN INSTALLING 

THE LIFE RAFT ON THE HELICOPTER.

The Aircraft Maintenance Manual (AMM) will incorporate these instructions in a future revision. Following 

integration of these instructions in the Aircraft Maintenance Manual (AMM), refer to it.
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Figure 1: AERAZUR life raft installation

f

d

b

e

Area Z g

(See Figure 2)

(See Figure 3)

c

(See Figure 2)

a
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Figure 2: Disassembly of life raft deployment control cables 

n

q

(See Figure 1)

(See Figure 1)

p

q

r

n

p

(See Figure 3)

L1: 110 mm ± 10 mm (3.937 in. ; 4.724 in.)
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Figure 3: Installation of the clip on the cylinder head 

(See Figure 1)

Step 1: Insert the clip (1) on 

the cylinder head (d) on 

cylinder (s) side.

Step 2: Tilt the clip (1) while 

holding it against the cylinder 

head (d).

Step 3: Lock the clip (1) on the 

cylinder head (d).

Make sure it is correctly locked.

d 1 s d 1 s d 1 s

(See Figure 2)

CROSS-SECTION

(See Figure 4)

(See Figure 4)

Tilt the clip (1) 

to lock it on the cylinder 

head (d).

(See Figure 4)

1

2 3

126 ± 1 mm (4.92 in; 5 in.)

(See Figure 5) 3
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Figure 4: Measurement of the clearance between the sleeve and the control cable guide

n

r

Direction of traction 

on the cylinder 

percussion cable 

(q). J1

2

t

q

(See Figure 3)

CROSS-SECTION

(See Figure 3)

J1: 6 to 26 mm (.236 to 1.023 in.)

t 2

(See Figure 5)

p

6

53.1
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Figure 5: Example of a life raft control sheath kit installation 

(See Figure 4)

2 3 d 1 t q

(See Figure 4)

q

3

g

Remove the pip pin 

(e) and its pennant 

(f) before closing 

the cover hatch (g). 

(left in place in the 

figure as an 

example)

h

j

m

k

(See Figure 3)