# Leonardo Alert Service Bulletin 109S-100: No revision named - Rights: © Leonardo S.p.A. Filed by the FAA in regulations.gov docket FAA-2021-0834, the docket of AD 2021-25-01. Not covered by OpenAirDocs’ CC0 dedication. - Document: [Leonardo Alert Service Bulletin 109S-100](https://openairdocs.org/service-documents/leonardo/109s-100.md) - Title as filed: Leonardo Helicopters ASB No. 109S-100 Rev 0 - Pages: 10 - PDF: https://openairdocs.org/files/sha256/e7/cc/e7ccd9bdbaae63736583393681b2f625f8ac25da80dd3ee0cf75d3e5b30bf983 - Page: https://openairdocs.org/service-documents/leonardo/109s-100/file/e7ccd9bdbaae ## Text Some pages are OCR from a scan. OCR can misread letters and numbers. Each page's text from the PDF; open the PDF at a page with #page=N. ### Page 1 N ° 109S-100 D ATE: February 2, 2021 REV. : / - March 15, 2017 P age 1 of 9 TITLE ATA 00 - BAGGAGE CIRCUIT BREAKERS ELECTRICAL INSTALLATION, PROTECTION OF REVISION LOG New 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 ### Page 2 S.B. N°109S-100 ALERT DATE: February 2, 2021 Page 2 of 9 REVISION: / 1. PLANNING INFORMATION A. EFFECTIVITY The Leonardo S.p.a. A109S helicopters from S/N 22707 thru S/N 22717 and S/Ns 22721, 22723, 22729 and from S/N 22731 thru S/N 22734. B. COMPLIANCE Within and not later than 200 flight hours after the issue of this Service Bulletin. C. CONCURRENT REQUIREMENTS N.A. D. REASON This Service Bulletin is issued in order to provide the necessary instruction on how to protect the cable assemblies installed within the baggage compartment from potential contact with structure. E. DESCRIPTION This SB is issued to provide the instructions necessary for the installation of some protective rubber borders on the edge of the baggage avionic bay frames in order to prevent chafing. 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. 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 2 (two) MMH are deemed necessary. ### Page 3 S.B. N°109S-100 ALERT DATE: February 2, 2021 REVISION: / Page 3 of 9 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 on ground for a safe maintenance - DM02 0B-A-06-41-00-00A-010A-A Access doors and panels - General data - 2) ACRONYMS AFT After CB Circuit Breaker DOA Design Organization Approval EASA European Aviation Safety Agency FWD Forward LHD Leonardo Helicopters Division MMH Maintenance Man Hours N.A. Not Applicable P/N Part Number 3) ANNEX N.A. J. PUBLICATIONS AFFECTED N.A. K. SOFTWARE ACCOMPLISHMENT SUMMARY N.A. ### Page 4 S.B. N°109S-100 ALERT DATE: February 2, 2021 Page 4 of 9 REVISION: / 2. MATERIAL INFORMATION A. REQUIRED MATERIALS 1) PARTS # P/N ALTERNATIVE P/N DESCRIPTION Q.TY LVL NOTE LOG P/N 1 A236A01AB Self-adhesive protective rubber 1,2 m . - 2) CONSUMABLES The following consumable materials, or equivalent, are necessary to accomplish this Service Bulletin: # Spec./LHD code number DESCRIPTION Q.TY NOTE PART 2 199-05-107 TY II, CL 5 Adhesive EC776 (C111) AR (1) - 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. NOTE Local supply. B. SPECIAL TOOLS N.A. 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. ### Page 5 S.B. N°109S-100 ALERT DATE: February 2, 2021 REVISION: / Page 5 of 9 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 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. c) Let adhesive cure at room temperature for at least 24 hours unless otherwise specified. 1. In accordance with the instruction given in the D M 0B-A-00-20-00-00A-120A-A, prepare the helicopter on ground for a safe maintenance. 2. In accordance with the DM 0B-A-06-41-00-00A-010A-A, open the baggage door D8. NOTE Before completely removing the fairing, disconnect the baggage light P/N B3550-307. 3. With reference to Figure 1 view A, remove the bag gage fairing assy fwd up P/N 109-0344-31-101. 4. Remove the rubber protections P/N 109-0746-52-105 and -107 shown in Figure 1 view B. NOTE Retain the removed Velcro for later reuse. 5. With reference to Figure 2 and Figure 3 view C-C, temporarily remove the Velcro stripes from the structure. 6. With reference to Figure 3 view C-C and section D-D, protect the edges through the installation of self-adhesive protective rubber P/N A236A01AB as described in the following procedures: 6.1 In accordance with CSRP publication, clean and degrease the area to be protected. NOTE Consider that, during the bonding process, the protective rubber is subject to a minor shrinkage. 6.2 Cut the protective rubber to the length required . ### Page 6 S.B. N°109S-100 ALERT DATE: February 2, 2021 Page 6 of 9 REVISION: / NOTE When handling the heated edging strip it will be advisable for the operator to wear protective gloves. CAUTION During the following operation with the heat gun be careful to do not damage or overheat the electrical components. 6.3 Set the heat gun at approximately 75°C, heat one end of the edging strip until adhesive becomes tacky and apply it to the edge to be protected. 6.4 With the end of the edging strip anchored, continue to heat the spine of the edging strip and feed it onto the edge to be protected. During this operation keep the strip reasonably taut. 6.5 Cut off the excess of material if necessary. 6.6 Heat the sides of the protective rubber and press it in place to ensure proper adhesion. 6.7 Repeat the steps from 6.1 to 6.6 for each edge to be protected. 7. With reference to Figure 2 and Figure 3 view C-C, restore the Velcro tape by means of adhesive 199- 05-107 TY II CL 5. 8. Reinstall the rubber protections P/N 109-0746-52-105 and -107 shown in Figure 1 view B. NOTE Before completely installing the fairing, connect the baggage light P/N B3550-307. 9. With reference to Figure 1 view A, reinstall the baggage fairing assy fwd up P/N 109-0344-31-101. 10. Return the helicopter to a ready to flight condition and record for compliance with this Service Bulletin on the helicopter logbook. 11. Send the attached compliance form to the following mail box: engineering.support.lhd@leonardocompany.com As an alternative, gain access to My Communications section on Leonardo WebPortal and compile the “Service Bulletin Application Communication”.  Non cancellare mai questo segnalibro Non cancellare mai interruzione sezione  ### Page 7 (OCR) : LEONARDO HELICOPTERS 109-0344-31-101 FAIRING ASSY FWD UP (REF) 109-0344-31-111 B DOOR FWD (REF) 109-0344-31-119 DOOR AFT (REF) VIEW A 109-0746-52-107 109-0746-52-105 RUBBER PROTECTION (REF) RUBBER PROTECTION (REF) BATTERY BUS AFT PANEL FWD PANEL VIEW B Figure 1 S.B. N°109S-100 ALERT DATE: February 2, 2021 REVISION: / Page 7 of 9 ### Page 8 Figure 2 S.B. N°109S-100 ALERT DATE: February 2, 2021 Page 8 of 9 REVISION: / ### Page 9 (OCR) * LEONARDO HELICOPTERS A305A16B2Y VELCRO (REF) BOND WITH ADESIVE 199-05-107 TY II CL 5 (TYP IN 6 PLACES) VIEW C-C 109-0342-26 (REF A236A01AB SELF-ADHESIVE PROTECTIVE RUBBER (TYP. IN 6 PLACES) SECTION D-D Figure 3 S.B. N°109S-100 ALERT DATE: February 2, 2021 REVISION: / Page 9 of 9 ### Page 10 Remarks: Information: SERVICE BULLETIN COMPLIANCE FORM Date: Number: Revision: Please send to the following address: Telephone: Fax: B.T. Compliance Date: Customer Name and Address: Helicopter Model S/N Total Number Total Hours T.S.O. LEONARDO S.p.A. CUSTOMER SUPPORT & SERVICES - ITALY PRODUCT SUPPORT ENGINEERING & LICENSES DEPT. Via Giovanni Agusta, 520 21017 Cascina Costa di Samarate (VA) - ITALY Tel.: +39 0331 225036 Fax: +39 0331 225988 We request your cooperation in filling this form, in order to keep out statistical data relevant to aircraft configuration up-to-date. The form should be filled in all its parts and sent to the above address or you can communicate the application also via Technical Bulletin Application Communication Section placed in Leonardo AW Customer Portal - MyCommunications Area. 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