ASB No. AS332-30.00.74

Revision 0 2013-07-31 Page 1/14 

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 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 secondary 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 inflation 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 configuration 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 MPAI seals can occur, or they may be impossible to 

inflate when needed. 

If this happens, helicopters equipped with MPAIs and de-icing 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 occurring, 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 type 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 ALERT SERVICE BULLETIN Revision 0 was approved 

on July 29, 2013 under the authority of EASA Design Organization Approval No. 21J.056 for 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 following 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-Support@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 Generating Systems: General instructions 

- MET: 25.10.00.401 - Cockpit: Removal - Installation of sliding crashworthy seat for 3rd crewmember 

- MTC: 20.02.01.410 - General: Installation 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 electrical 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 Department 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, please 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 

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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Special tools: 

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 instructions 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 equipment 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 breaker 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 wire 1XP79E on the side of circuit breaker panel 

“12 alpha”, (Figure 2). 

- Install the lug (6) on the end of wire 1XP79E, (Figure 3). 

- Using the pliers (xx) crimp the lug (6) on wire 1XP79E as per MTC Work Card 20.02.01.410. 

- Install circuit breaker (h) on location E10 of the circuit breaker panel (b) "12 alpha" as per Detail F, 

(Figure 3). 

- Attach circuit breaker (h) using the connection screw (not shown) to the bar PP5051. 

- Torque tighten the connection screw (not shown) of circuit breaker (h) in accordance with the value defined 

in Figure 3. 

- Install the lug (6) on circuit breaker (h) using 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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- In the electrical cabinet (d), disconnect connectors 85DEL-AP1 and 85DEL-BP2 (Figures 2 and 3). 

- Using the extraction tool (yy), unplug the contact located 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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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 according to the Flight Manual Procedure (PMV). 

- Carry out the test of the Multi-Purpose Air Intakes (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 “105α” 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” selector 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 “105α” test panel, press "PP3". 

- Check that the “BUS TIE” and “TRU1” 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” selector 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 modifications 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 from appendix 4. into the Flight Manual. 

- The Flight Manual (PMV) will incorporate these instructions as part of a future revision. After integration of 

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

 Maintenance instructions: 

Not applicable 
 

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Figure 1: Circuit breaker panels 

d 

a 

(See Figure 2) 

(See Figure 3) 

b 
 

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Figure 2: Circuit breaker panel 2 alpha (Modification 332P083736.05) 

h

e 

a 

(See Figure 1) 

e 

g 

8 

f 
 

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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