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Page 1 of 13 N° 109S-122 DA TE: September 30, 2024 REV. : / - December 22, 2023 TITLE ATA 26 – ENGINE FIRE EXTINGUISHER BOTTLES ELECTRICAL CONNECTIONS I
NSPECTION
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-122 ALERT DATE: September 30, 2024 Page 2 of 13 REVISION: /
1. PLANNING INFORMATION A. EFFECTIVITY All A109S helicopters.
All A109S helicopters with Trekker Kit up to S/N 22748 (included), except S/N 22742 and S/N 22747.
B. COMPLIANCE Within and not later than 50 flight hours or 3 months whichever occurs first after the issue of this Service Bulletin.
C. CONCURRENT REQUIREMENTS N.A.
D. REASON Leonardo Helicopters issued this Service Bulletin following an occurrence reporting an improper installation of the MTR cables and the bonding braids connected to the fire extinguisher bottles.
This Service Bulletin provides instructions on how to inspect the fire extinguisher bottles wirings installation and restore the proper configuration, if needed.
E. DESCRIPTION This Service Bulletin provides the instructions to perform a one-off inspection of both LH and RH engine fire extinguisher bottles to make sure that the MTR cables and the bonding braids are properly connected to the cartridge of the bypass valve and single outlet valve of the bottles. In case of improper installations, the Service Bulletin prescribes to restore the correct installation according to design.
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 Local Aviation Authority.
EASA states mandatory compliance with inspections, modifications or technical directives and related time of compliance by means of relevant Airworthiness Directives.
S.B. N°109S-122 ALERT DATE: September 30, 2024 REVISION: / Page 3 of 13 If an aircraft listed in the effectivity embodies a modification or repair not Leonardo Helicopters 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, approximately one (1) MMH are deemed necessary (ONLY for the inspection procedure).
MMH are based on hands-on time and can change with helicopter configuration, 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 I.1 PUBLICATIONS Following Data Modules refer to AMP:
DATA MODULE DESCRIPTION PART DM01 0B-A-00-20-00-00A-120A-A Helicopter safety – Preoperation - DM02 0B-A-06-41-00-00A-010A-A Access doors and panels – General data - DM03 0B-A-26-21-01-00A-520A-A Number 1 fire extinguishing bottle - Remove procedure - DM04 0B-A-26-21-01-00A-720A-A Number 1 fire extinguishing bottle - Install procedure - DM05 0B-A-26-22-01-00A-520A-A Number 2 fire extinguishing bottle - Remove procedure - DM06 0B-A-26-22-01-00A-720A-A Number 2 fire extinguishing bottle - Install procedure -
Following Data Modules refer to AWDP:
DATA MODULE DESCRIPTION PART DM07 0B-A-26-00-00-00A-051A-A Fire protection system - Wiring diagram - DM08 0B-K-26-00-00-00A-051A-A Fire protection system - Wiring diagram -
S.B. N°109S-122 ALERT DATE: September 30, 2024 Page 4 of 13 REVISION: /
DATA MODULE DESCRIPTION PART DM09 0B-K-26-00-00-00B-051A-A Fire protection system - Wiring diagram -
I.2 ACRONYMS & ABBREVIATIONS AMP Air vehicle Maintenance information AR As Required AWDP Air Vehicle Wiring Data information BP Bypass DM Data Module DOA Design Organization Approval EASA European Union Aviation Safety Agency IPD Illustrated Parts Data information ITEP Illustrated Tool and Equipment Publication LH Left Hand MMH Maintenance Man Hours MTR Motor N.A. Not Applicable P/N Part Number RH Right Hand SB Service Bulletin S/N Serial Number SO Single Outlet I.3 ANNEX N.A.
J. PUBLICATIONS AFFECTED A109S/AW109SP Air vehicle Maintenance information (AMP) 0B-A-AMP-00-X K. SOFTWARE ACCOMPLISHMENT SUMMARY N.A.
S.B. N°109S-122 ALERT DATE: September 30, 2024 REVISION: / Page 5 of 13
2. MATERIAL INFORMATION A. REQUIRED MATERIALS A.1 PARTS N.A.
A.2 CONSUMABLES N.A.
A.3 LOGISTIC MATRIX N.A.
NOTES N.A.
B. SPECIAL TOOLS Refer to ITEP for the special tools required to comply with the AMP DMs referenced in the accomplishment instructions.
SPECIAL TOOLS NOTES N.A.
C. INDUSTRY SUPPORT INFORMATION N.A.
S.B. N°109S-122 ALERT DATE: September 30, 2024 Page 6 of 13 REVISION: /
3. ACCOMPLISHMENT INSTRUCTIONS
GENERAL NOTES
a) 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 reuse.
b) Please refer to “LH fire extinguishing bottle” as “Number 1 fire extinguishing bottle” and refer to “RH fire extinguishing bottle” as “Number 2 fire extinguishing bottle”.
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-06-41-00-00A-010A-A and with reference to Figure 1, remove the external panel P18 to gain access to the area affected by the inspection.
WARNING
THE MTR CABLE MUST BE CONNECTED TO THE
CONNECTOR ON THE HEAD OF THE CARTRIDGE (POSITIVE TERMINAL OF THE CARTRIDGE, RED CIRCLE IN FIGURE 1).
THE BONDING BRAID MUST BE CONNECTED TO
THE CONNECTOR ON THE SIDE OF THE
CARTRIDGE (NEGATIVE TERMINAL OF THE CARTRIDGE, BLUE CIRCLE IN FIGURE 1).
3. In accordance with the following procedure and wi th reference to Figure 1 thru Figure 3, verify that the MTR cables and the bonding braids are correctly installed on the cartridges of the fire extinguisher bottles both on LH and RH side:
3.1 With reference to Figure 1, make sure that the bonding braids are connected in the proper positions on the LH fire extinguisher bottle.
S.B. N°109S-122 ALERT DATE: September 30, 2024 REVISION: / Page 7 of 13 NOTE The MTR1 cable must be connected to the connector on the head of the cartridge on the Bypass Valve.
The MTR2 cable must be connected to the connector on the head of the cartridge on the Single Outlet Valve.
3.2 With reference to AWDP DM 0B-A-26-00-00-00A-051A -A or DM 0B-K-26-00-00-00A-051A-A or DM 0B-K-26-00-00-00B-051A-A, as applicable, and Figure 3, make sure that the MTR1 and MTR2 cables are connected in the proper positions on the LH fire extinguisher bottle.
3.3 With reference to Figure 1, make sure that the bonding braids are connected in the proper positions on the RH fire extinguisher bottle.
NOTE The MTR1 cable must be connected to the connector on the head of the cartridge on the Single Outlet Valve.
The MTR2 cable must be connected to the connector on the head of the cartridge on the Bypass Valve.
3.4 With reference to AWDP DM 0B-A-26-00-00-00A-051A -A or DM 0B-K-26-00-00-00A-051A-A or DM 0B-K-26-00-00-00B-051A-A, as applicable, and Figure 2, make sure that the MTR1 and MTR2 cables are connected in the proper positions on the RH fire extinguisher bottle.
WARNING
THE MTR CABLE MUST BE CONNECTED TO THE
CONNECTOR ON THE HEAD OF THE CARTRIDGE (POSITIVE TERMINAL OF THE CARTRIDGE, RED CIRCLE IN FIGURE 1).
THE BONDING BRAID MUST BE CONNECTED TO
THE CONNECTOR ON THE SIDE OF THE
CARTRIDGE (NEGATIVE TERMINAL OF THE CARTRIDGE, BLUE CIRCLE IN FIGURE 1).
4. In case any improper installation was identified while performing step 3, restore the proper connections in accordance with the following procedure:
4.1 In case of any finding was detected on LH side (while performing steps 3.1 and 3.2):
4.1.1 In accordance with the applicable steps of AMP DM 0B-A-26-21-01-00A-520A-A, disconnect the affected bonding braid(s) and MTR cable(s) from the cartridge(s).
S.B. N°109S-122 ALERT DATE: September 30, 2024 Page 8 of 13 REVISION: / NOTE The MTR1 cable must be connected to the connector on the head of the cartridge on the Bypass Valve.
The MTR2 cable must be connected to the connector on the head of the cartridge on the Single Outlet Valve.
4.1.2 In accordance with the applicable steps of AMP DM 0B-A-26-21-01-00A-720A-A and with reference to Figure 1 View A and Figure 3, reinstall the bonding braid(s) and the MTR cable(s) in the correct position on the cartridge(s).
4.2 In case of any finding was detected on RH side (while performing steps 3.3 and 3.4):
4.2.1 In accordance with the applicable steps of AMP DM 0B-A-26-22-01-00A-520A-A, disconnect the affected bonding braid(s) and the MTR cable(s) from the cartridge(s).
NOTE The MTR1 cable must be connected to the connector on the head of the cartridge on the Single Outlet Valve.
The MTR2 cable must be connected to the connector on the head of the cartridge on the Bypass Valve.
4.2.2 In accordance with the applicable steps of AMP DM 0B-A-26-22-01-00A-720A-A and with reference to Figure 1 View A and Figure 2, reinstall the bonding braid(s) and the MTR cable(s) in the correct position on the cartridge(s).
NOTE “XXXXX” in the subject line below is the helicopter S/N.
5 . Compile the Inspection Report Form in Figure 4 and send it with Subject line “SB 109S-122 – S/N XXXXX Inspection Report Form” to the following mail box:
engineering.support.lhd@leonardo.com and (for North, Central and South America) also to:
AWPC.Engineering.Support@leonardocompany.us.
6. In accordance with AMP DM 0B-A-06-41-00-00A-010A-A, re-install the external panel P18 previously removed.
7. Return the helicopter to flight configuration and record for compliance with this Service Bulletin on the helicopter logbook.
S.B. N°109S-122 ALERT DATE: September 30, 2024 REVISION: / Page 9 of 13
8. Gain access to My Communications section on Leonardo Customer Portal and compile the “Service - Technical Bulletin Application”.
As an alternative, send the attached compliance form to the following mail box:
engineering.support.lhd@leonardo.com and (for North, Central and South America) also to:
AWPC.Engineering.Support@leonardocompany.us Non cancellare mai questo segnalibro Non cancellare mai interruzione sezione
Figure 1 S.B. N°109S-122 ALERT DATE: September 30, 2024 Page 10 of 13 REVISION: /
VIEW A
MTR CABLES ARE NOT SHOWN
STRUCTURE AND SYSTEMS ARE PARTIALLY OMITTED FOR BETTER CLARITY PURPOSE A
BONDING BRAID (REF) 27300-1 LH FIRE EXTINGUISHING BOTTLE (REF) 27300-1 RH FIRE EXTINGUISHING BOTTLE (REF)
BONDING BRAID (REF)
BONDING BRAID (REF)
MTR CONNECTION (REF) (TYP 2 PLCS)
BONDING CONNECTION (REF) (TYP 2 PLCS)
MTR CONNECTION (REF) (TYP 2 PLCS)
BONDING CONNECTION (REF) (TYP 2 PLCS)
BONDING BRAID (REF)
RH SIDE LH SIDE
CL HELICOPTER
BP VAL VE (REF)
BP VALVE (REF)
SO VALVE (REF)
SO VALVE (REF)
CARTRIDGE (REF)
CARTRIDGE (REF) CARTRIDGE (REF)
CARTRIDGE (REF) DETAIL B (SEE ALSO FIGURE 2) DETAIL C (SEE ALSO FIGURE 3)
LEONARDO
HELICOPTERS
RH ENGINE FIRE EXTINGUISHING BOTTLE (REF) MTR2 CABLE (W216A20 or 113)
BP VALVE (REF) (REF) SN. 0245
SO VALVE (REF) MTR1 CABLE (W207A20 or 117) (REF)
DETAIL B
FOR REFERENCE ONLY Figure 2 S.B. N°109S-122 ALERT DATE: September 30, 2024 REVISION: / Page 11 of 13
: LEONARDO
HELICOPTERS
LH ENGINE FIRE EXTINGUISHING BOTTLE (REF) MTR2 CABLE (W217A20 or 132) (REF)
SO VALVE (REF) MTR1 CABLE (W208A20 or 131) (REF)
BP VALVE (REF)
DETAIL C
FOR REFERENCE ONLY Figure 3 S.B. N°109S-122 ALERT DATE: September 30, 2024 Page 12 of 13 REVISION: /