Leonardo ASB 109S-115: No revision named

P age 1 of 21 N ° 109S-115 D ATE: March 21, 2023 REV. : / - March 15, 2017 TITLE ATA 64 – TAIL ROTOR HOUSING AND SLIDER GROUP DISASSEMBLY AND

REASSEMBLY

REVISION LOG First Issue An appropriate entry should be made in the aircraft log book upon accomplishment.

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

Leonardo S.p.A.

Via Giovanni Agusta, 520 21017 Cascina Costa di Samarate (VA) Italy Tel.: +39 0331 229111 - Fax: +39 0331 229605/222595 ALERT

SERVICE BULLETIN

S.B. N°109S-115 ALERT DATE: March 21, 2023 Page 2 of 21 REVISION: /

1. PLANNING INFORMATION A. EFFECTIVITY Part I:

 All A109S helicopters (from S/N 22001 thru S/N 22199) that have performed maintenance activities requiring the disassembly of the tail rotor duplex bearing housing after the helicopter delivery.

 All A109S helicopter with Trekker kit (from S/N 22701 thru S/N 22999) that have performed maintenance activities requiring the disassembly of the tail rotor duplex bearing housing after the helicopter delivery.

Part II:

 All A109S helicopters.

 All A109S helicopters with Trekker kit.

B. COMPLIANCE Part I:

Within and not later than 100 (one hundred) flight hours or 6 (six) months, whichever occurs first, after the issue of this Service Bulletin.

Part II:

At each assembly of the tail rotor duplex bearing housing.

C. CONCURRENT REQUIREMENTS N.A.

D. REASON This Service Bulletin is issued in order to prescribe the disassembly and reassembly of the housing and slider group of the tail rotor rotating controls.

E. DESCRIPTION There have been reported cases of ring-nut tighten loss, likely as a result of poor maintenance tasks accomplishment of the assembly instructions for the tail rotor housing and slider group.

In order to minimize the likelihood of occurrence of potential human errors during maintenance, LH updated the maintenance instructions in order to provide additional guidelines, including a better identification Vital Points (VP) for the assembly of the tail rotor duplex bearing support.

S.B. N°109S-115 ALERT DATE: March 21, 2023 REVISION: / Page 3 of 21 As such, this Service Bulletin requires (Part I) to perform the installation of the tail rotor duplex bearing housing following the IETP updated instructions and (Part II) requires to follow such updated instructions whenever the TR duplex bearing housing is assembled.

During the procedure, the operator must obey the Local Regulations applicable to the Vital Points.

F. APPROVAL The technical content of this Service Bulletin is approved under the authority of DOA nr.

EASA.21.J.005.

EASA states mandatory compliance with inspections, modifications or technical directives and related time of compliance by means of relevant Airworthiness Directives.

G. MANPOWER To comply with this Service Bulletin, the following MMH are deemed necessary:

Part I: 8 (eight).

Part II: N.A.

MMH are based on hands-on time and can change with personnel and facilities available.

H. WEIGHT AND BALANCE N.A.

I. REFERENCES

1) PUBLICATIONS

DATA MODULE DESCRIPTION PART DM01 0B-A-00-20-00-00A-120A-A Helicopter safety - Pre-operation I DM02 0B-A-64-00-00-00A-520A-A Tail rotor – remove procedure I DM03 0B-A-64-31-06-00A-520A-A Housing and slider group – remove procedure I DM04 0B-A-64-31-06-00A-530A-B Housing and slider group – disassemble procedure I DM05 0B-A-64-31-06-00A-710A-B Housing and slider group – assemble procedure I, II DM06 0B-A-64-31-06-00A-720A-A Housing and slider group – install procedure I DM07 0B-A-64-00-00-00A-720A-A Tail rotor – install procedure I

2) ACRONYMS & ABBREVIATIONS AMDI Aircraft Material Data Information AMP Aircraft Maintenance Publication

S.B. N°109S-115 ALERT DATE: March 21, 2023 Page 4 of 21 REVISION: / AMPI Aircraft Maintenance Planning Information DM Data Module DOA Design Organization Approval EASA European Aviation Safety Agency IETP Interactive Electronic Technical Publications IPD Illustrated Part Data ITEP Illustrated Tool and Equipment Publication LH Leonardo Helicopters MMH Maintenance Man Hours P/N Part Number S/N Serial Number

3) ANNEX Annex A AMP DM 0B-A-64-31-06-00A-710A-B Issue 13 J. PUBLICATIONS AFFECTED N.A.

K. SOFTWARE ACCOMPLISHMENT SUMMARY N.A.

S.B. N°109S-115 ALERT DATE: March 21, 2023 REVISION: / Page 5 of 21

2. MATERIAL INFORMATION A. REQUIRED MATERIALS

1) PARTS N.A.

2) CONSUMABLES Refer also to AMDI for the consumable materials required to comply with the AMP DM referenced in the accomplishment instructions.

3) LOGISTIC MATRIX N.A.

B. SPECIAL TOOLS Refer also to ITEP for the special tools required to comply with the AMP DM referenced in the accomplishment instructions.

C. INDUSTRY SUPPORT INFORMATION N.A.

S.B. N°109S-115 ALERT DATE: March 21, 2023 Page 6 of 21 REVISION: /

3. ACCOMPLISHMENT INSTRUCTIONS

GENERAL NOTES

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

b) Shape the cables in order to prevent interference with the structure and the other existing installations, using where necessary suitable lacing cords and plastic cable tiedown.

PART I

1. In accordance with AMP DM 0B-A-00-20-00-00A-120A-A, prepare the helicopter on ground for a safe maintenance. Disconnect the battery, all electrical power sources and/or the external power supply.

2. In accordance with AMP DM 0B-A-64-00-00-00A-520A-A, remove from the helicopter the tail rotor.

3. In accordance with AMP DM 0B-A-64-31-06-00A-520A-A, remove the tail rotor housing and slider group.

4. In accordance with AMP DM 0B-A-64-31-06-00A-530A-B, disassemble the tail rotor housing and slider group.

NOTE Vital Point (VP): the point of a component, assembly or installation, where incorrect assembly or an undetected error could cause the loss of rotorcraft and/or fatalities.

5. In accordance with AMP DM 0B-A-64-31-06-00A-710A- B Issue 13 (Ref. Leonardo WebPortal or Annex A of this Service Bulletin), assemble the tail rotor housing and slider group.

6. In accordance with AMP DM 0B-A-64-31-06-00A-720A-A, install the tail rotor housing and slider group.

7. In accordance with AMP DM 0B-A-64-00-00-00A-720A-A, install on the helicopter the tail rotor.

8. Return the helicopter to a ready to flight condition and record for compliance with Part I of this Service Bulletin on the helicopter logbook.

S.B. N°109S-115 ALERT DATE: March 21, 2023 REVISION: / Page 7 of 21

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

engineering.support.lhd@leonardo.com As an alternative, gain access to My Communications section on Leonardo WebPortal and compile the “Service Bulletin Application Communication”.

S.B. N°109S-115 ALERT DATE: March 21, 2023 Page 8 of 21 REVISION: /

PART II NOTE Vital Point (VP): the point of a component, assembly or installation, where incorrect assembly or an undetected error could cause the loss of rotorcraft and/or fatalities.

1. During the application of any maintenance operati on requiring the assembly of the TR duplex bearing housing, it is required to perform the relevant assembly procedure in accordance with AMP DM 0B-A-64-31-06-00A-710A-B Issue 13 (Ref. Leonardo WebPortal or Annex A of this Service Bulletin) or later published issues.

2. Record for compliance with Part II of this Service Bulletin on the helicopter logbook.

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

engineering.support.lhd@leonardo.com As an alternative, gain access to My Communications section on Leonardo WebPortal and compile the “Service Bulletin Application Communication”.

ANNEX A S.B. N°109S-115 ALERT DATE: March 21, 2023 REVISION: / Page 9 of 21

ANNEX A AMP DM 0B-A-64-31-06-00A-710A-B ISSUE 13

ANNEX A K LEONARDO HELICOPTERS A109S/AW109SP IETP 31st Issue Unmaintained Copy Page 1 of 12 Housing and slider group - Assemble procedure Table of contents References Preliminary requirements Procedure Requirements after job completion List of tables References Required conditions Support equipment 4 Supplies 5 Spares List of figures Housing and slider group - Assemble procedure (Sheet 1 of 5) Housing and slider group - Assemble procedure (Sheet 2 of 5) Housing and slider group - Assemble procedure (Sheet 3 of 5) Housing and slider group - Assemble procedure (Sheet 4 of 5) Housing and slider group - Assemble procedure (Sheet 5 of 5) References Table 1 References Data module Title 09-A-00-50-00-00A-013A-D Material data information publication - Numeric index OB-A-00-20-00-00A-120A-A Helicopter safety - Pre-operation OB-A-00-60-00-00A-010A-A Critical parts - General data OB-A-20-00-02-00A-712A-A Fasteners, caps, electrical connectors and turnbuckles - Lock procedure OB-A-64-00-00-01A-311A-B Tail rotor components - Visual check OB-A-64-31-06-00A-720A-A Housing and slider group - Install procedure OB-A-64-31-06-00B-710A-B Housing and slider group - Assemble procedure OB-A-GF-58-00-00A-066A-A Tool set, TR pitch change slider ring nut removal/installation (GF-58-00) - Support equipment and tools data OB-A-GF-59-00-00A-066A-A Tool set, TR pitch change housing ring nut removal/installation (GF-59-00) - Support equipment and tools data OB-A-GF-62-00-00A-066A-A AMP - OB-A-64-31-06-00A-710A-B Housing and slider group - Assemble procedure Printed on 13/03/2023 S.B. N°109S-115 ALERT DATE: March 21, 2023 Page 10 of 21 REVISION: /

ANNEX A * LEONARDO A109S/AW109SP IETP 31 st Issue Unmaintained Copy Page 2 of 12 Data module Title Tool set, TR duplex bearing installation (GF- 62-00) - Support equipment and tools data OB-A-GF-64-00-00A-066A-A Tool set, TR pitch change slider installation (GF-64-00) - Support equipment and tools data Preliminary requirements Required conditions Table 2 Required conditions Required condition Data module The helicopter must be safe for maintenance OB-A-00-20-00-00A-120A-A Support equipment Table 3 Support equipment Nomenclature Identification No. Qty Syringe Local supply 1 EA Pin GF-62-01 1 EA Base GF-62-02 1 EA Heating gun Local supply 1 EA Tool set, TR pitch change housing ring GF-59-00 1 EA nut removal/installation Wrench GF-59-01 1 EA Bolt GF-59-02 2 EA Base GF-59-01-01 • 1 EA Tool set, TR pitch change slider GF-64-00 1 EA installation Barrel GF-64-01 1 EA Bushing GF-64-02 1 EA Pin GF-64-03 1 EA Tool set, TR pitch change slider ring nut GF-58-00 • 1 EA removal/installation Wrench GF-58-01 1 EA Base GF-58-02 1 EA Feeler gage Local supply 1 EA Depth micrometer gage Local supply 1 EA AMP - OB-A-64-31-06-00A-710A-B Housing and slider group - Assemble procedure Printed on 13/03/2023 S.B. N°109S-115 ALERT DATE: March 21, 2023 REVISION: / Page 11 of 21

ANNEX A * LEONARDO HELICOPTERS A109S/AW109SP IETP 31st Issue Unmaintained Copy Page 3 of 12 Nomenclature Identification No. Qty Refrigerator Local supply 1 EA Supplies Table 4 Supplies Nomenclature Identification No. Qty Grease C594 AR Primer C446 AR Cloth, soft lint-free C011 AR Solvent, cleaning C023 AR Adhesive C029 AR Wire, safety C014 AR Oil C139 AR Prim er C237 AR Spares Table 5 Spares Nomenclature Identification No. Qty Lock ring 64310001-022 1 EA Lock ring 64310001H-022 1 EA Safety conditions

WARNINGS

• The materials that follow are dangerous. Before you do this procedure, make sure that you know all the safety precautions and first aid instructions for these materials:

Grease (C594);

Primer (C446);

- Solvent, cleaning (C023); Primer (C237);

- Adhesive (C029);

- Oil (C139).

• This installation includes Vital Points (VP). During the procedure, you must obey the Local Regulations applicable to the Vital Points.

CAUTIONS

• Make sure that you do not mix greases of different brands although the specifications are the same. Refer to the helicopter log book to prevent mixture of unwanted greases.

AMP - OB-A-64-31-06-00A-710A-B Housing and slider group - Assemble procedure Printed on 13/03/2023 S.B. N°109S-115 ALERT DATE: March 21, 2023 Page 12 of 21 REVISION: /