# Leonardo Alert Service Bulletin 109SP-122: No revision named - Rights: © Leonardo S.p.A. Filed by the FAA in regulations.gov docket FAA-2020-1139; AD 2021-05-04 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. - Document: [Leonardo Alert Service Bulletin 109SP-122](https://openairdocs.org/service-documents/leonardo/109sp-122.md) - Title as filed: Leonardo Helicopters EASB 109SP-122 - Pages: 18 - PDF: https://openairdocs.org/files/sha256/d4/e6/d4e65c80f73a4dcce1c711c5f4434bfd6acd6ef614a5cc401822d37af7d824cd - Page: https://openairdocs.org/service-documents/leonardo/109sp-122/file/d4e65c80f73a ## 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° 109SP-122 DA TE: July 5, 2018 REV. : / -March 15, 2017 Pa ge 1 of 17 TITLE ATA 00 - BAGGAGE CIRCUIT BREAKERS ELECTRICAL INSTALLATION, P ROTECTION 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 ### Page 2 S.B. N°109SP-122 EMERGENCY ALERT DATE: July 5, 2018 Page 2 of 17 REVISION: / 1. PLANNING INFORMATION A. EFFECTIVITY All the Leonardo Helicopters AW109SP up to S/N 22374 and from S/N 22377 up to S/N 22386. B. COMPLIANCE Part I^: Within the next 5FH since the issuance of this Service Bulletin and subsequently every 25FH until the application of Part II^. Part II^: Within and no later than 200 (two hundreds) flight hours since the issuance 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 inspect the cable assemblies installed within the baggage compartment (Part I^) and protect them from potential contact with structure (Part II^). E. DESCRIPTION One case of wire damage, which led to fire ignition and smoke in the baggage compartment, has been reported on an AW109SP helicopter. The damage has been caused by a contact of the cables with helicopter structure. This Service Bulletin provides the instructions to inspect the cable assemblies and protect them where a potential contact with the structure can occur. Moreover, this SB provides the instructions to protect the structure and the edges to prevent cable assy damages. F. APPROVAL The technical content of this Service Bulletin is approved under the authority of DOA nr. EASA.21J.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. ### Page 3 S.B. N°109SP-122 EMERGENCY ALERT DATE: July 5, 2018 REVISION: / Page 3 of 17 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 the following Maintenance-Man-Hours (MMH) are deemed necessary: Part I^ : approximately 2 (two) MMH Part II^ : approximately 4 (four) MMH 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 ### Page 4 S.B. N°109SP-122 EMERGENCY ALERT DATE: July 5, 2018 Page 4 of 17 REVISION: / 3) ANNEX N.A. J. PUBLICATIONS AFFECTED 0B-A-IPB-00-X Illustrated Parts Data Publication K. SOFTWARE ACCOMPLISHMENT SUMMARY N.A. ### Page 5 S.B. N°109SP-122 EMERGENCY ALERT DATE: July 5, 2018 REVISION: / Page 5 of 17 2. MATERIAL INFORMATION A. REQUIRED MATERIALS 1) PARTS PART I^ N.A. PART II^ # 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 GSC-21-98804-027 or GSC-21-99604-027 Teflon tape AR (1) II 3 EN6049-006-08-5 Nomex sleeve AR (1) I, II 4 EN6049-006-13-5 Nomex sleeve AR (1) I, II 5 EN6049-006-16-5 Nomex sleeve AR (1) I, II 6 199-05-107 TY II, CL 5 Adhesive EC776 (C111) AR (1) II 3) LOGISTIC MATRIX N.A. NOTE (1) 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 6 S.B. N°109SP-122 EMERGENCY ALERT DATE: July 5, 2018 Page 6 of 17 REVISION: / 3. ACCOMPLISHMENT INSTRUCTIONS GENERAL NOTES a) Replace the hardware found damaged during the following operations. b) At the end of the rework operations, remove all the used tools and completely remove any working residual using a suitable air cleaner. PART I^ 1 . In accordance with the instruction given in the DM 09-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 B efore completely removing the fairing, disconnect the baggage light P/N B3550-307 (Ref. step 3). 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 and inspect the cable assemblies routing of both circuit barker panels for damage/chafing. 5. If damages are found, repair the cables as necessary in accordance with electrical standard practice publication and protect the cables trough the installation of Nomex sleeve P/N EN6049-006. 6. Reinstall the rubber protections P/N 109-0746-52-105 and -107 shown in Figure 1 view B. NOTE B efore completely installing the fairing, connect the baggage light P/N B3550-307 (Ref. step 7). 7. With reference to Figure 1 view A, reinstall the baggage fairing assy fwd up P/N 109-0344-31-101 with attaching hardware previously removed. 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. 9. Send the attached compliance form to the following mail box: aw109.mbx.aw@leonardocompany.com As an alternative, gain access to My Communications section on Leonardo WebPortal and compile the “Service Bulletin Application Communication”. ### Page 7 S.B. N°109SP-122 EMERGENCY ALERT DATE: July 5, 2018 REVISION: / Page 7 of 17 PART II^ 1. In accordance with the instruction given in the DM 09-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 B efore completely removing the fairing, disconnect the baggage light P/N B3550-307 (Ref. step 3). 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 R etain the removed Velcro for later reuse (Ref. step 5). 5. With reference to Figure 6 view F-F, temporarily remove the Velcro stripes from the structure. 6. Identify all the areas where an insufficient clearance between cables and structure (see Figure 2 for reference) occurs and protect the cable assemblies through the installation of Nomex sleeve P/N EN6049-006, where not already installed as per Part I of this SB, as shown in Figure 3. 7. In the same areas where an insufficient clearance is found (see Figure 2 for examples), protect the structure by means of Teflon tape P/N GSC-21-98804-027 as shown in Figure 4. 8. With reference to Figure 6 view E-E, install Teflon tape P/N GSC-21-98804-027 also between structure bonding braid. 9. With reference to Figure 5 view C-C, view D-D and Figure 7 view G-G, install two layers of Teflon tape P/N GSC-21-98804-027 on the structure covering the attaching hardware (bolt or nut plate). 10. With reference to Figure 8 verify if cables are in contact with bus bar or head of screw, if insufficient clearance is found restore the appropriate installation as described below: 10.1 Relocate the lacing cord, as necessary, in order to obtain clearance between cable assy and bus bar. 10.2 Protect the cable assy by means of Nomex sleeve P/N EN6049-006. NOTE Be careful to ensure continuity of the connection (do not install Teflon under the screw). 10.3 With reference to Figure 8, apply a layer of Te flon tape on bus bar. ### Page 8 S.B. N°109SP-122 EMERGENCY ALERT DATE: July 5, 2018 Page 8 of 17 REVISION: / 11. With reference to Figure 7 view G-G and section H-H, protect the edges through the installation of self-adhesive protective rubber P/N A236A01AB as described in the following procedures: 11.1 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. 11.2 Cut the protective rubber to the length require d. 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. 11.3 Set the heat gun at approximately 75°C, heat on e end of the edging strip until adhesive becomes tacky and apply it to the edge to be protected. 11.4 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. 11.5 Cut off the excess of material if necessary. 11.6 Heat the sides of the protective rubber and press it in place to ensure proper adhesion. 11.7 Repeat the steps from 11.1 to 11.7 for each edge to be protected. 12. With reference to Figure 6 view F-F, restore the Velcro tape by means of adhesive 199- 05-107 TY II CL 5. 13. Reinstall the rubber protections P/N 109-0746-52-105 and -107 shown in Figure 1 view B. NOTE B efore completely installing the fairing, connect the baggage light P/N B3550-307 (Ref. step 14). 14. With reference to Figure 1 view A, reinstall the baggage fairing assy fwd up P/N 109-0344-31-101. 15. Return the helicopter to a ready to flight condition and record for compliance with Part II of this Service Bulletin on the helicopter logbook. ### Page 9 S.B. N°109SP-122 EMERGENCY ALERT DATE: July 5, 2018 REVISION: / Page 9 of 17 16. Send the attached compliance form to the following mail box: aw109.mbx.aw@leonardocompany.com As an alternative, gain access to My Communications section on Leonardo WebPortal and compile the “Service Bulletin Application Communication”. ### Page 10 (OCR) A LEONARDO HELICOPTERS 109-0344-31-101 FAIRING ASSY FWD UP (REF) 109-0344-31-111 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) AC BUS # 2 *WATTERY SUS AFT PANEL FWD PANEL VIEW B Figure 1 Page 10 of 17 ### Page 11 (OCR) LEONARDO HELICOPTERS BONDING BRAID (REF) CB328 Examples of insufficient clearance cable-structure (protect cables and structure) Figure 2 S.B. N°109SP-122 EMERGENCY ALERT DATE: July 5, 2018 REVISION: / Page 11 of 17 ### Page 12 Figure 3 S.B. N°109SP-122 EMERGENCY ALERT DATE: July 5, 2018 Page 12 of 17 REVISION: / Example of Nomex installation ### Page 13 (OCR) _ LEONARDO HELICOPTERS GSC-21-98804-027 TEFLON TAPE Example of Teflon installation on the structure Figure 4 S.B. N°109SP-122 EMERGENCY ALERT DATE: July 5, 2018 REVISION: / Page 13 of 17 ### Page 14 (OCR) LEONARDO HELICOPTERS FWD PANEL VIEW LOOKING INSIDE GSC-21-98804-027 TEFLON TAPE (N. 2 OFF) VIEW C-C 98804-027 VIEW D-D Figure 5 S.B. N°109SP-122 EMERGENCY ALERT DATE: July 5, 2018 Page 14 of 17 ### Page 15 (OCR) : LEONARDO HELICOPTERS IH REF 130.0 GSC-21-98804-02 TEFLON TAPE VIEW E-E A305A16B2Y VELCRO (REF) BOND WITH ADESIVE 199-05-107 TY I| CL 5 (TYP IN 6 PLACES) VIEW F-F Figure 6 S.B. N°109SP-122 EMERGENCY ALERT DATE: July 5, 2018 REVISION: / Page 15 of 17 ### Page 16 (OCR) LEONARDO HELICOPTERS A236A01AB (REF) A236A01AB (REF) A236A01AB (REF) GSC-21-98804-027 TEFLON TAPE (N. 2 OFF) 175.0 A236A01AB (REF) A236A01AB (REF) 220.0 FWD PANEL A236A01AB (REF) AFT PANEL VIEW G-G 109-0342-26 (REF SELF-ADAESIVE PROTECTIVE RUBBER (TYP. IN 6 PLACES) SECTION H-H Figure 7 S.B. N°109SP-122 EMERGENCY ALERT DATE: July 5, 2018 Page 16 of 17 REVISION: / ### Page 17 (OCR) : LEONARDO HELICOPTERS 426 - 8G CB328 CB320 CB318 CB308 Example of insufficient clearance cable-BUS BAR (protect cables and bus bar) ICR326 GSC-21-98804-027 TEFLON TAPE Example of Teflon installation on the bus bar Figure 8 S.B. N°109SP-122 EMERGENCY ALERT DATE: July 5, 2018 REVISION: / Page 17 of 17 ### Page 18 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. We thank you beforehand for the information given. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. 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