# ASB No. EC225-30A032

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### Civil version(s): LP



# 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 an essential bus bar which cannot be cut off

Corresponds to modification 332P083736.01/.02



### Revision No. Date of issue

Revision 0 2013-07-31



### Summary:

The relocation of the power supply circuit breaker of t he electric multi-purpose air intake of engine 2 onto an

essential bus bar which cannot be cut off enables the inflation of the multi-purpose air intake seal in the event of battery powered emergency flight.



### Compliance:

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

S/N: 2600, 2623, 2645, 2656, 2659, 2663, 2666, 2670, 2673, 2685, 2691, 2692, 2693, 2702, 2715, 2716, 2721, 2725, 2739, 2744, 2747, 2753, 2756, 2759, 2767, 2779, 2794

# ASB No. EC225-30A032

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### 1. PLANNING INFORMATION

1.A. EFFECTIVITY

1.A.1. Helicopters/installed equipment

Helicopters listed on page 1 and in the table below, equi pped with Electric Multi-Purpose Air Intakes (MPAI) and which do not embody modification 332P083736.01 or 332P083736.02.

Modification Helicopter serial numbers

332P083736.01 2600, 2623, 2645, 2656, 2659, 2663, 2666, 2670, 2673, 2693

332P083736.02 2685, 2691, 2692, 2702, 2715, 2716, 2721, 2725, 2739, 2744, 2747, 2753,

2756, 2759, 2767, 2779, 2794



### NOTE

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

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)),

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 modifications 332P083736.01

and 332P083736.02 which ensure that MPAI seal inflation of at least one air intake is always maintained, regardless of it being battery powered emergency flight or another type of electrical power generation failure.



### 1.D. DESCRIPTION

Compliance with this ALERT SERVICE BULLETIN consists in relocating circuit breaker "MPURP A INT" or "EA I 2" of engine 2 from its position to a positio n on an essential bus bar which cannot be cut off.

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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 modifi cation 332P083736.01 or 332P083736.02 which was approved on July 19, 2013 by the EASA for helic opters 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 followi ng 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.

- MMA: 24-00-00-611 - General: General instructions

- MMA: 25-12-01-051 - Third crewmember seat - Removal-Installation

- MMA: 30-00-00-611 - General: General instructions

- MTC: 20.02.01.411 - General: Cable binding methods

- MTC: 20.02.01.415 - General: Installation of el ectrical 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:

- MMA: Aircraft Maintenance Manual - IPC: Illustrated Parts Catalog - MCS: Wiring Diagrams Manual - PMV: Flight Manual (Section 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 Department will advise cu stomers 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 and/or components or assistance, 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 Cable clamp 1 EN3545-007SCD 5

Label A/R 332A62-9910-22 6

Label A/R 332A-62-9010-20 7

Label A/R 332P624503FK 8

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

Designation Qty Tool P/N or equivalent Item

Insertion and extraction tool 1 M81969/39–01 zz Multimeter 1 Off the shelf yy

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 instructions as per MMA Task 24-00-00-611. Read and comply with the general instructions as per MMA Task 30-00-00-611. Read and comply with the cable binding methods as per MTC Work Card 20.02.01.411. Read and comply with the general 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 MMA Task 25-12-01-051. - Open all cowlings, panels, doors and remove all equi pment required to gain access to the different work

areas.

3.B.2. Relocation of the engine 2 MPAI power supply circuit breaker (Figures 1 to 3)

3.B.2.a. Modification 332P083736.01: relocation of circuit breaker " 2PP-D12 " to " 2PP-F20 " (Figures 1 and 2)

- Release the captive screws (c) from th e front panel assembly (d), (Figure 1). - Remove the front panel assembly (d). - Remove the seal (e) from the front panel assembly (d). - Remove the centering plate (f). - Remove circuit breaker (g) installed in location D12. - Install circuit breaker (g) on location F20 of ci rcuit breaker panel 2PP as per Detail B, (Figure 2).

- Disconnect connectors BD and BF. - Remove the blank (k) installed on location "20" of connector BF. - Using the extraction tool (zz) u nplug contact 25 from connector BD. - Using the insertion tool (zz) plug the contact into location 20 of connector BF. - Install the blank (k) on location "25" of connector BD.

# ASB No. EC225-30A032

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

. Carry out an electrical continuity test between contac t 20 of connector BF and contact G of connector A of

control panel 4HA, (Figure 2).

- Install the cable clamp (5) ( not shown) on connector "BF".

- Connect connectors BD and BF. - Using the cable ties (4) (not shown), route and a ttach wire 3021-82 to prevent any interference.

- Remove label (j) located at F20 as per Detail B, (Figure 2). - Remove label (h) located at D12. - Install label (j) or (7) at D12. - Install label (h) or (6) at F20. - Install the centering plate (f), (Figure 1). - Install the seal (e) of the front panel assembly (d). - Install the front panel assembly (d ) using the captive screws (c).

3.B.2.b. Modification 332P083736.02: relocation of circuit breaker " 2PP-D9 " to " 2PP-F20 " (Figures 1 and 3)

- Release the captive screws (c) from th e front panel assembly (d), (Figure 1). - Remove the front panel assembly (d). - Remove the seal (e) from the front panel assembly (d). - Remove the centering plate (f). - Remove circuit breaker (g) installed in location D9. - Install circuit breaker (g) on location F20 of ci rcuit breaker panel 2PP as per Detail C, (Figure 3).

- Disconnect connectors BD and BF. - Remove the blank (k) installed at location 20 on connector BF. - Using the extraction tool (zz) u nplug contact 28 from connector BD. - Using the insertion tool (zz) plug the contact into location 20 of connector BF. - Install the blank (k) at location 28 on connector BD.

- 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).

. Carry out an electrical continuity test between contac t 20 of connector BF and contact G of connector A of

control panel 4HA, (Figure 3).

# ASB No. EC225-30A032

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This document is available on the internet: www.eurocopter.com/techpub - Install the cable clamp (5) (not shown) on connector BF.

- Connect connectors BD and BF. - Using the cable ties (4), route and attach wire 3021-942 to prevent any interference.

- Remove label (j) located at F20 as per Detail C, (Figure 3). - Remove label (m) located at D9. - Install label (j) or (7) at D9. - Install label (m) or (8) at F20. - Install the centering plate (f) (Figure 1). - Install the seal (e) from the front panel assembly (d). - Install the front panel assembly (d ) using the captive screws (c).

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 MMA Task 25-12-01-051. - 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

Functional check of the Multi-Purpose Air Intakes (MPAI)

Preliminary operations:

- Remove or open the equipment giving access to test panel “56VU” - Start both engines at nominal rating in accor dance with the Flight Manual Procedure (PMV). - Test the MPAIs in accordance with the Flight Manual Procedure and visually chec k the correct inflation of

the seals.

Functional check of MPAIs on PRE MOD 07-26556 helicopters:

- Set the MPAIs into “ANTI-ICING” configuration. - On panel “56VU”, press “PP2” - Check that indicator lights “BAT+”, “ESS BUS”, “BUS-TIE” and “TRU2” come on. - Place the voltage measurement selector on “ ESS.BUS” and check that there is no voltage: . Visually check that the MPAI seal of engine No. 1 remains inflated and that the MPAI seal of engine

No. 2 deflates.

- Switch the “BUS TIE” cont rol to “OPEN” then to “NORM”

- Reset “TRU2”:

. Visually check that the MPAI seal of engine No. 1 remains inflated and that the MPAI seal of engine

No. 2 inflates. - On panel “56VU”, press “PP3”. - Check that the “SEC BUS”, BUS TIE” and “TRU 1” indicator lights come on,

- Switch the “SHEDDING” invertor to “SHED” or for equipped helicopters activate the emergency hydroelectric power supply as per procedure SUP12 paragraph 4.1 in the Flight Manual.

. Visually check that the MPAI seal of engine No. 1 deflates and that the MPAI seal of engine No. 2

remains inflated.

NOTE 1

For helicopters equipped with an emergency hydro-electric power supply, shedding is only effective when the “FLOW” indicator light is out.

- Switch the "SHEDDING" invertor to "NORM" then switch the "BUS TIE" selector to "OPEN" then to

"NORM” or, for equipped helicopters, deactivate the hy dro-electric power supply as per procedure SUP12 paragraph 4.1 of the Flight Manual.

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

remains inflated.

- Shut down both engines according to the Flight Manual Procedure. - Install or close the equipment giving access to test panel “56VU”

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This document is available on the internet: www.eurocopter.com/techpub Functional check of MPAIs on POST MOD 07-26556 helicopters:

- Set the MPAIs into “ANT I-ICING” configuration. - On the panel "56VU", press "PP2". - Check that the “BAT+”, “ESS BUS”, “BUS TIE” and “TRU2” indicator lights come on. - Place the voltage measurement selector on “ ESS.BUS” and check that there is no voltage. . Visually check that the MPAI seal of engine No .1 remains inflated and that the MPAI seal of engine

No. 2 deflates. . Check that the "BULL" indicator light for the MPAI of engine No. 2 comes on.

- Switch the "BUS TIE" selector to “OPEN” then to “NORM”.

- Reset "TRU2":

. Visually check that the MPAI seal of engine No.1 remains inflated and that the MPAI seal of engine

No. 2 inflates. . Check that the “BULL” indicator light for the MPAI of engine No. 2 goes out. - On test panel "56VU", press "PP3". - Check that the “SEC BUS”, “BUS.TIE”, and “TRU1” indicator lights come on. - Switch the "SHEDDING" invertor to "SHED" or, for equipped helicopters, activate the emergency hydroelectric power supply as per procedure SUP12 paragraph 4.1 of the Flight Manual. . Visually check that the MPAI seal of engine No. 1 deflates and that the MPAI seal for engine No. 2

remains inflated. . Check that the "BULL" indicator light for the MPAI of engine No. 1 comes on.

NOTE 2

For helicopters equipped with an emergency hydro-electric power supply, shedding is only effective when the “FLOW” indicator light is out.

- Switch the "SHEDDING" invertor to "NORM" then switch the "BUS TIE" selector to "OPEN" then to

"NORM” or, for equipped helicopters, deactivate t he hydro-electric power supply as per procedure SUP12 paragraph 4.1 of the Flight Manual.

- Reset "TRU1":

. Visually check that the MPAI seal of engine No.1 inflates and that the MPAI seal of engine No. 2

remains inflated. . Check that the “BULL” indicator light for the MPAI of engine No. 2 goes out.

- Shut down both engines according to the Flight Manual Procedure. - Install or close the equipment giving access to test panel “56VU”

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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 332P083736.01 or 332P083736.02 in the helicopter documents.



### 3.D. OPERATING AND MAINTENANCE INSTRUCTIONS

Operating instructions:

- Pending its update, incorporate the pages from the appendix 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.

# ASB No. EC225-30A032

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This document is available on the internet: www.eurocopter.com/techpub Figure 1: Circuit breaker panel 2PP a

c

f e

g b

d See Figure 2 and 3 

## -

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This document is available on the internet: www.eurocopter.com/techpub Figure 2: Circuit breaker panel 2PP Front face (Modification 332P083736.01) g j

h

6 h j

7 See Figure 1 PRE MOD

POST MOD

k k

a

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This document is available on the internet: www.eurocopter.com/techpub Figure 3: Circuit breaker panel 2PP Front face (Modification 332P083736.02) PRE MOD

POST MOD

g j

m 8 m j

7 See Figure 1 k

k

a

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### 4. APPENDIX

Sheets to be inserted in the Flight Manual:

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