# ASB No. AS332-30.00.74

Revision 0 2013-07-31 Page 1/14

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

### Civil version(s): L1



# ALERT SERVICE BULLETIN

SUBJECT: ICE AND RAIN PROTECTION - Electric Multi-Purpose Air Intakes

Relocation of one of the two power supply circuit breakers of the electric multi-purpose air intakes onto a seconda ry bar which cannot be cut-off

Corresponds to modification 332P083736.05



### Revision No. Date of issue

Revision 0 2013-07-31



### Summary:

The relocation of the power supply circuit breaker of the electric multi-purpose air intake of engine 1 onto a secondary bar which cannot be cut-off enables the seal inflat ion of at least one multi-purpose air intake in the event of a short circuit on the PP2 essential bus bar or emergency battery powered flight.



### Compliance:

EUROCOPTER makes compliance with this ALERT SERVICE BULLETIN mandatory. For the attention of

S/N: 2774

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### 1. PLANNING INFORMATION

1.A. EFFECTIVITY

1.A.1. Helicopters/installed equipment

Helicopter listed on page 1, equipped with Electric Multi-Purpose Air Intakes (MPAI) and which does not embody modification 332P083736.05.



### NOTE

Refer to the aircraft individual inspection record to identify the actual configurat ion of the aircraft.

1.A.2. Non-installed equipment

Not applicable.



### 1.B. ASSOCIATED REQUIREMENTS

Not applicable.



### 1.C. REASON

In case of battery operated emergency flight (loss of both alternators or both Transformer-Rectifiers (TRU)),

or in the event of a short circuit on the PP2 essential bus bar, the two P2 electro-valves used to inflate the MPAI seal are no longer energized. Consequently, on each engine air intake, deflation of the M PAI seals can occur, or they may be impossible to

inflate when needed. If this happens, helicopters equipped with MPAIs and de-ic ing equipment could be exposed to the risk of dual engine flame-out if ice ingestion occurs during flight in icing conditions. In order to prevent this situation from occurrin g, EUROCOPTER has defined modification 332P083736.05

which ensures that MPAI seal inflation of at least one air intake is always maintained, regardless of it being battery powered emergency flight or another ty pe of electrical power generation failure.



### 1.D. DESCRIPTION

Compliance with this ALERT SERVICE BULLETIN consists in relocating the power supply circuit breaker of the engine 1 MPAI from the essential bus bar to the PP5051 secondary bar which is not cut off in emergency flight.

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### 1.E. COMPLIANCE

1.E.1. Compliance at the works

Not applicable.

1.E.2. Compliance in service

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

Helicopters/installed equipment:

Comply with paragraph 3. of this ALERT SERVICE BULLETIN before reaching 110 flying hours following receipt of this ALERT SERVICE BULLETIN, issued on the date indicated at the bottom of the page.

Non-installed equipment:

Not applicable.



### 1.F. APPROVAL

Approval of modifications:

The information or instructions relate to modification 332P083736.05, which was approved on July 19, 2013 under the authority of EASA for helicopters of civil versions subject to an Airworthiness

Certificate.

Approval of this document:

The technical information contained in this AL ERT SERVICE BULLETIN Revision 0 was approved on July 29, 2013 under the authority of EASA Design Organization Approv al No. 21J.056 fo r helicopters of civil versions subject to an Airworthiness Certificate.



### 1.G. MANPOWER

EUROCOPTER recommends that compliance with this ALERT SERVICE BULLETIN be ensured by personnel with the following qualification:

Qualification: 1 Avionics Technician.

1 Pilot.

The time for the operations is given for information purposes, for a standard configuration. Time for the operations: 8 hours for one Avionics Technician. 1 hour for the ground run-up.

The estimated helicopter downtime is 1 day.

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### 1.H. WEIGHT AND BALANCE

Not applicable.



### 1.I. EFFECT ON ELECTRICAL LOADS

It is the responsibility of the customer to update the helicopter’s electrical breakdown, with technical

assistance from EUROCOPTER. A copy of the electrical breakdown, duly updated follo wing modification on the helicopter, must be sent to the EUROCOPTER Technical Support Department: Fax: + 33 (0)4.42.85.99.66

E-mail: Avionics.Technical-S upport@eurocopter.com



### 1.J. SOFTWARE MODIFICATION EMBODIMENT RECORD

Not applicable.



### 1.K. REFERENCES

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

- MET: 24.00.00.301 - Electrical Power Gene rating Systems: General instructions - MET: 25.10.00.401 - Cockpit: Removal - Insta llation of sliding crashworthy seat for 3 rd crewmember

- MTC: 20.02.01.410 - General: Installati on of crimped terminal lugs on cables - MTC: 20.02.01.411 - General: Cable binding methods

- MTC: 20.02.01.415 - General: Installation of electrical cable bundles and optical fibres

- MTC: 20.02.01.418 - General: Protection of elec trical wiring during maintenance operations



### 1.L. DOCUMENTS AFFECTED

The modification will be integrated into the following manuals:

- MET: Maintenance Manual - IPC: Illustrated Parts Catalog - MCS: Wiring Diagrams Manual - PMV: Flight Manual (Vol. 1, 3.8.)

The documents affected will be updated during a future revision.



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

Not applicable

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### 2. MATERIAL INFORMATION

2.A. MATERIAL: PRICE - AVAILABILITY - PROCUREMENT

EUROCOPTER's Super Puma Program D epartment will advise the customer of availability times for kits or components.

EUROCOPTER Etablissement de Marignane Direction Ventes et Relations Client (ECR)

13725 MARIGNANE CEDEX

FRANCE


### NOTE 1

On the purchase order, pl ease specify the mode of transport, the destination and the serial numbers of the

aircraft 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

For any information concerning the modification kits a nd/or components or assist ance, contact the Sales & Customer Relations Department.



### 2.C. MATERIAL REQUIRED FOR EACH HELICOPTER/COMPONENT

Material to be ordered separately:

Designation Qty New P/N Item Former

P/N → Instruction

Extension lead A/R ECS0739C20-20 1

Cable A/R EN2267-010A004S 2

NOMEX sheath A/R EN6049-003-02-5 3

Cable tie A/R E0043-1A0P 4 Cap 1 E0737B0816 5 Lug 1 NSA936501TA2003 6

Label A/R 332A00-0052-HH 8

Label A/R 332P62-4502-94 9

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Designation Qty Tool P/N or equivalent Item

Hot air gun 1 Off the shelf zz Insertion and extraction tool 1 M81969/39-01 yy Pliers 1 576779 (or equivalent) xx

Products to be ordered separately:

As per Work Cards and Tasks mentioned in this ALERT SERVICE BULLETIN.

The products can be ordered separately from the INTERTURBINE AVIATION LOGISTICS company.

Website: http://www.interturbine.com

Phone: +49.41.91.809.300

AOG: +49.41.91.809.444



### 2.D. MATERIAL TO BE RETURNED

Not applicable.

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### 3. ACCOMPLISHMENT INSTRUCTIONS

3.A. GENERAL

Read and comply with the general electrical inst ructions as per MET Work Card 24.00.00.301. Read and comply with the cable binding methods as per MTC Work Card 20.02.01.411. Read and comply with the instructions concerning the installation of electrical cable bundles as per MTC

Work Card 20.02.01.415. Read and comply with the instructions concerning the protection of electrical wiring during maintenance operations as per MTC Work Card 20.02.01.418.



### 3.B. OPERATIONAL PROCEDURE

3.B.1. Preliminary steps

- Install the access equipment. - If necessary, remove the 3rd crewmember seat as per MET Work Card 25.10.00.401. - Open all cowlings, panels, doors and remove all equi pment required to gain access to the different work

areas.

3.B.2. Embodiment of modification 332P083736.05 (engine 1): relocation of circuit breaker " 2 alpha H7 " to

" 12 Alpha E10 " (Figures 1, 2 and 3)

- Open circuit breaker panels (a) "2 alpha" and (b) "12 alpha" on the electrical cabinet (d) as per

Details A and C, (Figure 1).
- Remove the blank (e) from circuit breaker panel (b) "12 alpha" as per Detail F, (Figure 3).
- Disconnect circuit breaker (h) from circuit breake r panel (a) "2 alpha" as per Detail D, (Figure 2).
- Remove circuit breaker (h) from circuit breaker panel (a) "2 alpha" as per Detail D.
- Cut the wire at the lug of circuit breaker (h).
- Discard the lug.
- Install a cap (5) on the end of the wire (Figure 3).
- Shrink-fit the cap (5) onto the wire using the hot air gun (zz).
- Route the wire using cable ties (4) (not shown) in order to prevent interference.
- Install the blank (e) onto location H7 of circuit breaker panel (a) "2 alpha" as per Detail D, (Figure 2).
- Locate and identify wire 1XP79E (Figure 2).
- Remove and discard the cap (f) from the end of wi re 1XP79E on the side of circuit breaker panel

“12 alpha”, (Figure 2).
- Install the lug (6) on the e nd of wire 1XP79E, (Figure 3).
- Using the pliers (xx) crimp the lug (6) on wi re 1XP79E as per MTC Work Card 20.02.01.410.
- Install circuit breaker (h) on location E10 of the ci rcuit breaker panel (b) "12 alpha" as per Detail F,

(Figure 3).
- Attach circuit breaker (h) using the connec tion screw (not shown) to the bar PP5051.
- Torque tighten the connection screw (not shown) of circ uit breaker (h) in accordance with the value defined

in Figure 3.
- Install the lug (6) on circuit breaker (h) usin g the connection screw (not shown) (Figure 3)
- Torque-tighten the connection screw ( not shown) of circuit breaker (h) in accordance with the value defined

in Figure 3.
- Torque-tighten the attachment nut (not shown) of circuit breaker (h) in accordance with the value

defined in Detail F, (Figure 3).

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This document is available on the internet: www.eurocopter.com/techpub - In the electrical cabinet (d), disconnect connec tors 85DEL-AP1 and 85DEL-BP2 (Figures 2 and 3).
- Using the extraction tool (yy), unplug the contact lo cated in position "12" of connector 85DEL-AP1,

(Figure 2).
- Route wire 1HE253E so as to integrate it in the bundle of connector 85DEL-BP2, (Figure 3).



### NOTE 1

If necessary, use the extension lead (1) and the wire (2) protected with sheath (3) to extend wire 1HE253E.

- Remove the blank (g) from location "11" of connector 85DEL-BP2, (Figure 2).
- Using the insertion tool (yy) plug the connector into location "11" of connector 85DEL-BP2, (Figure 3).
- Insert the blank (g) into location "12" of connector 85DEL-AP1.
- Check that the plugged-in contact is correctly retained:

. Hold the back of the connector,



### CAUTION

THE PULLING MOVEMENT MUST BE PERFORMED SMOOTHLY, PARALLEL TO THE CONNECTOR

AXIS WITHOUT DETERIORATING THE ELECTRICAL WIRE (E.G.: BY FOLDING, TWISTING OR WINDING IT)

- Connect the connectors 85DEL-AP1 and 85DEL-BP2, (Figures 2 and 3).
- Carry out an electrical continuity test between circuit breaker (h) on location E10 of circuit breaker panel (b)

"12 alpha" and BP2 connector terminal G of control unit 189H (Figure 3). - Bond label (8) to circuit breaker panel (a) "2 alpha" as per Detail D, (Figure 2). - Bond label (9) to circuit breaker panel (b) "12 alpha" as per Detail F, (Figure 3).

3.B.3. Final steps

- Install all the removed equipment and close all cowlings, panels and doors opened during the preliminary

steps. - If necessary, install the 3rd crewmember seat as per MET Work Card 25.10.00.401. - Remove the access equipment.

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This document is available on the internet: www.eurocopter.com/techpub 3.B.4. Ground run-up/Flight test

Preliminary operations:

- Remove or open the equipment giving access to test panel “105 α ”. - Start the two engines at nominal rating acco rding to the Flight Manual Procedure (PMV). - Carry out the test of the Multi-Purpose Air Intake s (MPAI) according to the Flight Manual Procedure and

visually check for correct inflation of the seals.

Tests:

- Position the MPAIs in "ANTI-ICING" configuration.

- On the “105 α ” test panel, press "PP2". - Check that the “BAT+”, “BUS TIE” and “TRU2” indicator lights come on: . Visually check that the MPAI seal of engine No. 1 remains inflated and that the MPAI seal of engine

No. 2 deflates: OK.

- Switch the “COUPLING” sele ctor to "OFF” then to “ON”.

- Reset “TRU2”: . Visually check that the MPAI seal of engine No. 1 remains inflated and that the MPAI seal of engine

No. 2 inflates: OK.

- On the “105 α ” test panel, press "PP3".

- Check that the “BUS TIE” and “T RU1” indicator lights come on. - Switch the "SHEDDING" invertor to “SHED” for equipped helicopters: . Visually check that the MPAI seal of engine No. 1 deflates and that the MPAI seal of engine No. 2

remains inflated: OK. - Switch the "SHEDDING" invertor to “NORM” for equipped helicopters.

- Switch the “COUPLING” sele ctor to "OFF” then to “ON”.

- Reset “TRU1”: . Visually check that the MPAI seal of engine No. 1 inflates and that the MPAI seal of engine No. 2

remains inflated: OK.

- Shut down both engines according to the Flight Manual Procedure. - Install or shut the equipment giving access to test panel “105 α ”.

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### 3.C. IDENTIFICATION

Identification of this document:

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

Identification of modifica tions on the documentation:

Record embodiment of modification 332P083736.05 in the helicopter documents.



### 3.D. OPERATING AND MAINTENANCE INSTRUCTIONS

Operating instructions:

- Pending its update, incorporate the page fr om appendix 4. into the Flight Manual.

- The Flight Manual (PMV) will incorporat e these instructions as part of a fu ture revision. After integration of

these instructions in the Fli ght Manual (PMV), refer to it.

Maintenance instructions:

Not applicable

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(See Figure 2)

(See Figure 3) b

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This document is available on the internet: www.eurocopter.com/techpub Figure 2: Circuit breaker panel 2 alpha (Modification 332P083736.05) h

e

a (See Figure 1) e
g

8 f

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This document is available on the internet: www.eurocopter.com/techpub Figure 3: Circuit breaker panel 12 alpha (modification 332P083736.05) e g

5

6

0.17

15.046

(See Figure 1)

e b

h 9

0.5

44.253

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### 4. APPENDIX

Sheet to be inserted in the Flight Manual