Leonardo ASB 412-157: No revision named

N° 412-157 DA TE: December 17, 2019 REV. : / - M arch 15, 2017 Pa ge 1 of 27 TITLE ATA 25 - EMERGENCY FLOAT ASSY P/N 412-4600-03-101 & -102, FLOAT SUPPLY H

OSES INSPECTION OF

REVISION LOG New Issue Leonardo S.p.A.

Via Giovanni Agusta, 520 21017 Cascina Costa di Samarate (VA) Italy Tel.: +39 0331 229111 - Fax: +39 0331 229605/222595 An appropriate entry should be made in the aircraft log book upon accomplishment.

If ownership of aircraft has changed, please, forward to new owner.

EMERGENCY ALERT

SERVICE BULLETIN

S.B. N°412-157 EMERGENCY ALERT DATE: December 17, 2019 Page 2 of 27 REVISION: /

1. PLANNING INFORMATION A. EFFECTIVITY
All AB412 / AB412EP helicopter equipped with Emergency Float Assy listed in Table 1 (Ref. kit 412-4600-04-all dash).

Spare Emergency Float Assy listed in Table 1 (Ref. kit 412-4600-04-all dash), kept in stock.

P/N S/N Description 412-4600-03-101 (Float P/N 412-4600-03-107, Manufacturer P/N 215271-0) all serial number up to S/N 117 Emergency Float Assy LH 412-4600-03-102 (Float P/N 412-4600-03-108, Manufacturer P/N 215349-0) all serial number up to S/N 121 Emergency Float assy RH Table 1 NOTE Emergency Flotation Assy are NOT affected if:

• SAFRAN Service Bulletin SB 025-69-19 is marked on the external identification label of EFS, and/or

• Service Bulletin SB 412-157 is recorded on the component Log Card or equivalent record;

even if they have a S/N listed in above Table 1.

All Float Supply Hoses P/N 215342-0 manufactured until April 2015, kept in stock and not installing a piece of green heat-shrinkable sleeve.

NOTE The manufacturing date of the Float Supply Hose is found on the identification label of the hose (refer to Figure 1 in Annex A for location).

B. COMPLIANCE
Within and not later than fifteen (15) FH after the issue of this Service Bulletin, for all helicopters equipped with Emergency Float Assy listed in below Table 2.

P/N S/N Description 412-4600-03-101 (Float P/N 412-4600-03-107, Manufacturer P/N 215271-0) 99, 100, 110 Emergency Float Assy LH 412-4600-03-102 (Float P/N 412-4600-03-108, Manufacturer P/N 215349-0) 105, 106, 107, 110, 119 Emergency Float assy RH Table 2

S.B. N°412-157 EMERGENCY ALERT DATE: December 17, 2019 REVISION: / Page 3 of 27
Within and not later than three-hundred (300) FH or during the next scheduled eighteen (18) months inspection, whichever occurs first after the issue of this Service Bulletin, for all helicopters equipped with:

• Emergency Float Assy with S/N not listed in Table 2 above;

Within and not later than the next eighteen (18) months or before helicopter installation, whichever occurs first, after the issue of this Service Bulletin, for:

• all Emergency Float Assy listed in Table 1 above, kept in stock

• all Float Supply Hose P/N 215342-0 kept in stock C. CONCURRENT REQUIREMENTS N.A.

D. REASON This Service Bulletin is issued in order to prescribe the check of the proper air flow through the Float Supply Hoses P/N 215342-0, part of the LH/RH Emergency Float Assy P/N 412-4600-03-101/-102.

E. DESCRIPTION During maintenance operations on an Emergency Float System (EFS), not installed on AB412 fleet, the third compartment of the left forward float did not inflate. The supply hose ensuring the gas flow from the cylinder assembly to the related float compartment was found blocked.

The investigations revealed that the same issue could affect the supply hoses P/N 215342-0 applicable to AB412 EFS.

To prevent any event of lack of inflation of one or more floats in case of ditching, a special inspection shall be performed to in-service and spare float supply hoses to verify that each component is fully operational.

This Service Bulletin provides the necessary instruction to inspect the Float Supply Hoses P/N 215342-0 in accordance with SAFRAN Aerosystems Service Bulletin SB 025-69-19 Revision 00 enclosed as Annex A of this document.

F. APPROVAL The technical content of this Service Bulletin is approved under the authority of DOA nr. EASA.21.J.005. For helicopters registered under other Aviation Authorities, before applying the Service Bulletin, applicable Aviation Authority approval must be checked within Leonardo Helicopters customer portal.

S.B. N°412-157 EMERGENCY ALERT DATE: December 17, 2019 Page 4 of 27 REVISION: / EASA states mandatory compliance with inspections, modifications or technical directives and related time of compliance by means of relevant Airworthiness Directives.

If an aircraft listed in the effectivity embodies a modification or repair not LHD certified and affecting the content of this Service Bulletin, it is responsibility of the Owner/Operator to obtain a formal approval by Aviation Authority having jurisdiction on the aircraft, for any adaptation necessary before incorporation of the present Service Bulletin.

G. MANPOWER To comply with this Service Bulletin ten (10) minutes are deemed necessary.

MMH are based on hands-on time and can change with personnel and facilities available. MMH are not comprehensive of the overall hours necessary to get access to work areas and to remove all the equipment that interferes with the application of the prescribed instructions.

H. WEIGHT AND BALANCE N.A.

I. REFERENCES

1) PUBLICATIONS

DESCRIPTION PART AB412-MM 25-61-04 Paragraph 2 Maintenance Manual – Emergency floats kit (P/N 412-4600-04) - Removal - AB412-MM 25-61-04 Paragraph 3 Maintenance Manual – Emergency floats kit (P/N 412-4600-04) – Folding Procedures - AB412-MM 25-61-04 Paragraph 4 Maintenance Manual – Emergency floats kit (P/N 412-4600-04) - Installation - 25-69-29 Aerazur Component Maintenance Manual Emergency Flotation System for AB412 helicopter -

2) ACRONYMS CMM Component Maintenance Manual DOA Design Organization Approval EASA European Aviation Safety Agency EFS Emergency Float System FH Flight Hours IPC Illustrated Part Catalog

S.B. N°412-157 EMERGENCY ALERT DATE: December 17, 2019 REVISION: / Page 5 of 27 LH Left LHD Leonardo Helicopters Division LS Local Supply MM Maintenance Manual MMH Maintenance Man Hours N.A. Not Applicable P/N Part Number RH Right SB Service Bulletin

3) ANNEX Annex A SAFRAN SB 025-69-19 Revision 00.

J. PUBLICATIONS AFFECTED N.A.

K. SOFTWARE ACCOMPLISHMENT SUMMARY N.A.

S.B. N°412-157 EMERGENCY ALERT DATE: December 17, 2019 Page 6 of 27 REVISION: /

2. MATERIAL INFORMATION A. REQUIRED MATERIALS

1) PARTS # P/N ALTERNATIVE P/N DESCRIPTION Q.TY LVL NOTE LOG P/N 1 215342-0 Float supply hose AR . (1) -

2) CONSUMABLES The following consumable materials, or equivalent, are necessary to accomplish this Service Bulletin:

# Spec./LHD code number DESCRIPTION Q.TY NOTE PART 2 35163 Tape adhesive – width 50 mm, as per MIL-T-43115 AR (2) 3 919012 (Cord R721 A805) Lacing cord AR (2)(4) - 4 919019 (Cord R6109 A665) Lacing cord AR (2) (4) - 5 919020 (Cord R709 A535) Lacing cord AR (2) (4) - 6 919009 (Cord R6301 A665) Lacing cord AR (2) (4) - 7 939024 MASTINOX paste AR (2) - 8 00468 (Velcro R6315 A050) Pile Velcro Tape, width 25 mm AR (2) - 9 Commercial Heat shrinkable sleeve, green color AR (2) - 10 01040 O-rings (14,00X1,78 20B7) AR (2) (3) - 11 961068 O-rings (15,60X1,78 20B9) AR (2) (3) -

3) LOGISTIC MATRIX N.A.

NOTE

(1) This item is provided to approved operators only if the blockage of the installed Float Supply Hose occurs during the inspection procedure described in Accomplishment Instructions.

(2) Item to be procured as local supply.

(3) Item requested only if damaged during Float Supply Hose removal / installation.

(4) To be ordered for LH/RH Emergency Float Assy folding procedure.

B. SPECIAL TOOLS The following special tools, or equivalent, are necessary to accomplish this Service Bulletin:

# P/N DESCRIPTION Q.TY NOTE PART 12 Commercial Plastic cable tie, 300 mm min. x 5 mm max.

(11.811 in min. x .196 in max.)

1 - 13 412-0960-26-101 Folding kit P/N 215996-0 1 (B1)(B2) - 14 Commercial Oil and moisture free compressed air source with 20-micron filter 1 (B1) -

S.B. N°412-157 EMERGENCY ALERT DATE: December 17, 2019 REVISION: / Page 7 of 27

SPECIAL TOOLS NOTE To be ordered for Emergency Float Assy unfolding/folding procedure. (B1) Folding kit P/N 215996-0 including: (B2) N° 2 Lacing Tools P/N 215645 • N° 5 Inflation / deflation tools P/N 212684 • N° 1 Positioning tool P/N 215644 • N° 1 Lacing kit P/N 215992 • C. INDUSTRY SUPPORT INFORMATION WARRANTY: Owners/Operators who comply with the instructions of this Service Bulletin no later than the applicable date in the “Compliance” section will be eligible to receive REQUIRED MATERIALS on free of charge basis, except for Consumable Materials and Special Tools.

NOTE: Customers who fail to comply with the instructions in this Service Bulletin before the compliance date are not eligible for the aforementioned special policy.

Please Issue relevant MMIR form to your Warranty Administration Dpt.

S.B. N°412-157 EMERGENCY ALERT DATE: December 17, 2019 Page 8 of 27 REVISION: /

3. ACCOMPLISHMENT INSTRUCTIONS

GENERAL NOTES Place an identification tag on all components that are re-usable, including the attaching hardware that has been removed to gain access to the modification area and adequately protect them until their later re-use.

NOTE Skip step 1, 2, 4, 9, 10, 12 for the for Emergency Float Assy P/N 412-4600-03-101/-102 kept in stock.

NOTE Skip step 1 thru 5, 7 thru 10 and 12 for the for Float Supply Hose P/N 215342-0 kept in stock.

1. In accordance with the instructions given in the AB412-MM Maintenance Manual prepare the helicopter on ground for a safe maintenance. Disconnect the battery and any source of electrical power supply.

CAUTION All installations must be handled with extreme care during all working phases to prevent equipment damage.

NOTE Instructions in below steps 2 thru 11, are the same for both side of installation (LH and RH).

2. Remove the Load Tube with related Float and Gas C ylinder from the helicopter, in accordance with MM Section 25-61-04, Paragraph 2.

3. Disconnect the Cylinder Supply Hose from Float Supply Hose P/N 215342-0 and temporarily install protection plug to prevent line contamination.

4. Unfold the affected Float as follows:

4.1 Open the Cover by unfastening the VELCRO strips

4.2 Breaking / remove the break cords

4.3 Release (slip them) the Front and Rear Caps

4.4 Unfold the Float

S.B. N°412-157 EMERGENCY ALERT DATE: December 17, 2019 REVISION: / Page 9 of 27

5. Remove the Float Supply Hose P/N 215342-0 from the Float, in accordance with CMM 25-69-29 Section “Assembly” Paragraph 2.C.1.b, with reverse procedure.

6. Inspect and reidentify the Float Supply Hose P/N 215342-0, in accordance with Annex A, Paragraph 3.C “Procedure”.

7. Reidentify the Float, in accordance with Annex A, Paragraph 3.C “Procedure”.

8. Protect metallic part and install the Float Supply Hose P/N 215342-0 on the Float, in accordance with CMM Section “Assembly” Paragraphs 2.C.1.a and 2.C.1.b.

9. Fold the Float, in accordance with MM 25-61-04, Paragraph 3.

10. Install the Load Tube with related Float and Gas Cylinder to the helicopter, in accordance with applicable instruction of MM Section 25-61-04, Paragraph 4.

11. Record the compliance with this Service Bulletin on the component log card or equivalent record.

12. Return the helicopter to flight configuration and record for compliance with this Service Bulletin on the helicopter logbook.

13. Send the attached compliance form to the following mail box:

absereng.aw@leonardocompany.com As an alternative, gain access to My Communications section on Leonardo WebPortal and compile the “Service Bulletin Application Communication”.

S.B. N°412-157 EMERGENCY ALERT DATE: December 17, 2019 Page 10 of 27 REVISION: /

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S.B. N°412-157 EMERGENCY ALERT DATE: December 17, 2019 REVISION: / Page 11 of 27

ANNEX A SAFRAN SB 025-69-19 REVISION 00 EQUIPMENT/FURNISHINGS (ATA 25) EMERGENCY FLOTATION

SYSTEMS INSPECTION OF FLOAT SUPPLY HOSES

S SAFRAN ZODIAC AEROSPACE SERVICES

TECHNICAL PUBLICATION DEPARTMENT 61 rue Pierre Curie - CS20001 78373 PLAISIR CEDEX - FRANCE Phone: (33) 1 61 34 23 23 Fax: (33) 1 61 34 21 13 Web site: www.safran-aerosystems.com/customers

TRANSMITTAL LETTER This Transmittal Letter applies to the original issue, dated NOV 22/19, of Service Bulletin 025-69-19.

REASON FOR REVISION:

Not applicable.

REVISION SEQUENCE:

Initial issue ...: NOV 22/19 DATE: NOV 22/19 SERVICE BULLETIN 025-69-19 REVISION: 00 PAGE: 1 / 2 S.B. N°412-157 EMERGENCY ALERT DATE: December 17, 2019 Page 12 of 27 REVISION: /