# ASB No. EC155

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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

Helicopte rs equipped with optional AERAZUR TYPE SR10 external life rafts:

- life raft, Part Number (MP/N) 245431

- 0 (former cylinder without beacon installation provisions),

- life raf t, Part Number (MP/N) 245431

- 1 (carbon cylinder without beacon installation provision s),

- life raft, Part Number (MP/N) 245434

- 0 (metal cylinder with beacon installation provisions),

- life raf t, Part Number (MP/N) 245434

- 1 (carbon cylinder with beacon installation provisions )

.

1.A.2. Non

- installed equipment

Not applicable.



### 1.B. ASSOCIATE D 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 Mainten ance 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

insi de 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. C ylinder displ acement 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 position s of the inflati on 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 Pa rt 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 ALER T SERVICE BULLETIN consists in:

- O pening the containers of the optional life rafts.

- I mproving the life raft deployment controls.

- R eturning the helicopter to flight configuration.



### 1.E. COMPLIANCE

1.E.1. Compliance at the works

Helicopters/installe d 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 Numbe rs (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 complia nce 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 wit hin

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

the bottom of the page.

- For heli copters equipped with life raft Part Number ( MP/N) 245434

- 0:

If the helicopter is used for missions which requi re 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 d ate

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 Organ ization 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 Org anization 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:

Qualificati on: 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

No t 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

- In stallation

- 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 Depar tment.

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 Cli ent (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

F ax: +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 Form er

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 PR OCEDURE

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) (De tail 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) (D etail B, Figure 1). 

### WARNING

WARNING

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- 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, Fig ure 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 t he 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) b y 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.

- T orque

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



### CAUTION

THE BARREL HEAD OF T HE 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 Deta il 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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(.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 s light ly curv ed 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) (Det ail 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.

- Re move 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 K IT WHEN INSTALLING

THE LIFE RAFT ON THE HELICOPTER.

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

integra tion of these instructions in the Aircraft Maintenance Manual (AMM), refer to it.

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d b

e

g Area Z (See Figure 2)

(See Figure 3) c

(See Figure 2) a

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(See Fig ure 1)

p q r

n p (See Figure 3)

L1: 110 mm ± 10 mm (3.937 in. ; 4.724 in.)

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Step 1: Insert the clip (1) on

the cylinder head (d) on

cylinder (s) side. Step 2: Tilt the clip (1) while

holdin g it against the cylinder

head (d). Step 3: Lock the clip (1) on the

cylinder head (d).

Make sure it is correctly locked. s 1 d d s s d 1 1

(See Figure 2)

CROSS

- SECTION

(See Figu re 4)

(See Figure 4) Tilt the clip (1)

to lock it on the cylinder

head (d).

(See Figure 4)

1

3 2 126 ± 1 mm (4.92 in; 5 in.) 3 (See Figure 5)

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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.) 2 t

(See Figure 5) p

6

53.1

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d 1 3 2 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)