# Leonardo Alert Service Bulletin 109SP-134: No revision named - Rights: © Leonardo S.p.A. Filed by the FAA in regulations.gov docket FAA-2021-0720, the docket of AD 2021-23-10. Not covered by OpenAirDocs’ CC0 dedication. - Document: [Leonardo Alert Service Bulletin 109SP-134](https://openairdocs.org/service-documents/leonardo/109sp-134.md) - Title as filed: Leonardo Helicopters ASB No. 109SP-134 - Pages: 16 - PDF: https://openairdocs.org/files/sha256/7c/74/7c7481fefabfbd98a9a9b68b46fd4fcf55fc7f2da387d0f6aa6ace1c7709a71e - Page: https://openairdocs.org/service-documents/leonardo/109sp-134/file/7c7481fefabf ## Text Each page's text from the PDF; open the PDF at a page with #page=N. ### Page 1 E RRATA CORRIGE Ple ase find here attached the page that has to be replaced in the basic Service Bulletin n° 109SP-134 PAGE 2 “COMPLIANCE” Was: …hydraulic pump P/N 109-076-42-103 having… Becomes: …hydraulic pump P/N 109-0760-42-103 having… ### Page 2 N° 109SP-134 DATE: July 29, 2019 REV. : / - March 15, 2017 Page 1 of 14 TITLE A TA 29 - HYDRAULIC PUMP P/N 109-0760-42-103, INSPECTION AND REPLACEMENT 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 3 S. B. N°109SP-134 ALERT DATE: July 29, 2019 Page 2 of 14 REVISION: / 1. PLANNING INFORMATION A. EFFECTIVITY All the AW109SP helicopters which install at least one hydraulic pump P /N 109-0760-42-103. B. COMPLIANCE NOTE If it is not possible to calculate the flight hours accumulated by the hydraulic pump, consider the installed pump with more than 1600 flight hours. For helicopters which install two hydraulic pumps P/N 109-0760-42-103: • Part I:  For hydraulic pump P/N 109-0760-42-103 having accumulated more than 1600 flight hours: within and not later than 25 flight hours after the issue of this Service Bulletin.  For hydraulic pump P/N 109-0760-42-103 having accumulated less than 1600 flight hours: at reaching of 1600 flight hours or within 25 flight hours, whichever comes later, after the issue of this Service Bulletin. • Part II: at reaching of 1600 flight hours or within and not later than 200 flight hours, whichever comes later, after the issuance of this Service Bulletin. For helicopters which install only one hydraulic pump P/N 109-0760-42-103: • Part I:  For hydraulic pump P/N 109-0760-42-103 having accumulated more than 1600 flight hours: within and not later than 50 flight hours after the issue of this Service Bulletin.  For hydraulic pump P/N 109-0760-42-103 having accumulated less than 1600 flight hours: at reaching of 1600 flight hours or within 50 flight hours, whichever comes later, after the issue of this Service Bulletin. • Part II: at reaching of 1600 flight hours or within and not later than 200 flight hours, whichever comes later, after the issuance of this Service Bulletin. ### Page 4 S.B. N°109SP-134 ALERT DATE: July 29, 2019 REVISION: / Page 3 of 14 C. CONCURRENT REQUIREMENTS N.A. D. REASON This Service Bulletin is issued in order to provide the necessary instructions to perform the inspection for wear (Part I) of the hydraulic pump P/N 109-0760-42-103 and its replacement (Part II) with the hydraulic pump P/N 109-0760-42-105. E. DESCRIPTION During a revision process of the AW109SP Technical Publications 0B-A-IPD-00-X, it has been found that the hydraulic pump P/N 109-0760-42-103 has been indicated as fully interchangeable with the hydraulic pump P/N 109-0760-42-105. Although hydraulic pumps P/N 109-0760-42-103 and -105 have the same performance and safety characteristics (they can be both used on A109E, A109LUH, A109S and A119/AW119MKII models), the external shaft P/N 45052 of the hydraulic pump P/N 109-0760-42-103 must be inspected for wear every 1600 flight hours. The inspection is not included in the AMPI Chapter 5 of the AW109SP model. This Service Bulletin is issued to require operator to inspect the hydraulic pump P/N 109-0760-42-103 (Part I), and to replace it with hydraulic pump P/N 109-0760-42-105 (Part II) with a schedule depending on the FHs accumulated by the pumps. 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 ### Page 5 S.B. N°109SP-134 ALERT DATE: July 29, 2019 Page 4 of 14 REVISION: / To comply with this Service Bulletin the following Maintenance Man Hours are deemed necessary: Part I: approximately 4 (four) MMH; Part II: approximately 6 (six) 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 safety - Make the helicopter safe for maintenance I, II DM02 0B-A-06-41-00-00A-010A-A Access doors and panels - General data I, II DM03 0B-A-29-11-10-00A-520A-A Number 1 ripple damper - Remove procedures I, II DM04 0B-A-29-12-10-00A-520A-A Number 2 ripple damper - Remove procedures I, II DM05 0B-A-00-50-00-00A-074A-D Material data - Dangerous materials I, II DM06 0B-A-20-40-01-00A-010A-A Standard practices - Hydraulic system - General data I, II DM07 0B-A-29-11-10-00A-720A-A Number 1 ripple damper - Install procedures I, II DM08 0B-A-29-12-10-00A-720A-A Number 2 ripple damper - Install procedures I, II DM09 0B-A-12-11-02-00A-218A-A Flight control hydraulic system - Number 1 reservoir - Fill with fluid I, II DM10 0B-A-12-11-03-00A-218A-A Flight control hydraulic system - Number 2 reservoir - Fill with fluid I, II DM11 0B-A-29-11-02-00A-231A-A Number 1 pump - Bleed I, II DM12 0B-A-29-12-02-00A-231A-A Number 2 hydraulic pump suction line - Bleed I, II DM13 0B-A-29-11-00-00A-320A-A Number 1 main hydraulic system - Operation tests I, II DM14 0B-A-29-12-00-00A-320A-A Number 2 main hydraulic system - Operation tests I, II DM15 0B-A-29-11-02-00A-520A-A Number 1 pump - Remove procedures II DM16 0B-A-29-12-02-00A-520A-A Number 2 pump - Remove procedures II ### Page 6 S.B. N°109SP-134 ALERT DATE: July 29, 2019 REVISION: / Page 5 of 14 DATA MODULE DESCRIPTION PART DM17 0B-A-29-11-02-00A-521A-B Number 1 pump - Return to basic configuration (Undressing) II DM18 0B-A-29-12-02-00A-521A-B Number 2 pump - Return to basic configuration (Undressing) II DM19 0B-A-29-11-02-00A-721A-B Number 1 pump - Build-up to usable configuration (Dressing) II DM20 0B-A-29-12-02-00A-721A-B Number 2 pump - Build-up to usable configuration (Dressing) II DM21 0B-A-29-11-02-00A-720A-A Number 1 pump - Install procedures II DM22 0B-A-29-12-02-00A-720A-A Number 2 pump - Install procedures II 2) ACRONYMS AR As Required DOA Design Organization Approval EASA European Aviation Safety Agency LHD Leonardo Helicopters Division LS Local Supply MMH Maintenance Man Hours N.A. Not Applicable P/N Part Number SB Service Bulletin S/N Serial Number 3) ANNEX N.A. J. PUBLICATIONS AFFECTED 0B-A-AMP-00-X Maintenance Publication. 0B-A-IPD-00-X Illustrated Parts Data Publication. K. SOFTWARE ACCOMPLISHMENT SUMMARY N.A. ### Page 7 S.B. N°109SP-134 ALERT DATE: July 29, 2019 Page 6 of 14 REVISION: / 2. MATERIAL INFORMATION A. REQUIRED MATERIALS 1) PARTS PART I # P/N ALTERNATIVE P/N DESCRIPTION Q.TY LVL NOTE LOG P/N 1 AS3491-01 Gasket 1 . 709-039L1 2 AS3581-906 M83248/2-906 O-ring 1 . 709-039L1 PART II # P/N ALTERNATIVE P/N DESCRIPTION Q.TY LVL NOTE LOG P/N 3 AS3491-01 Gasket 1 . 709-039L1 4 AS3581-906 M83248/2-906 O-ring 1 . 709-039L1 5 109-0760-42-105 Hydraulic pump 1 . (1) - 6 MS28778-5 Packing, preformed 1 . 709-039L1 7 MS28778-8 Packing, preformed 1 . 709-039L1 8 MS28778-6 Packing, preformed 1 . 709-039L1 9 MS28773-06 O-ring 1 . 709-039L1 10 MS28778-4 Packing, preformed 1 . 709-039L1 Refer also to IPD for the spares materials required to comply with the AMP DMs referenced in the accomplishment instructions. 2) CONSUMABLES The following consumable materials, or equivalent, are necessary to accomplish this Service Bulletin: # Spec./LHD code number DESCRIPTION Q.TY NOTE PART 11 MIL-PRF-680, TY II (LHD cod. 505405407) Cleaning solvent Ardrox 5503A (C287) AR (2) I, II 12 CCC-C-46 (LHD cod. 590210190) Cloth, soft lint-free (C011) AR (2) I, II 13 MIL-G-21164 (LHD cod. 999999999000002864) AeroShell Grease 64 (C603) AR (2) I, II 14 MIL-PRF-83282 (LHD cod. 40401215) Hydraulic fluid (C053) AR (2)(3) I, II 15 MIL-PRF-5606 Hydraulic fluid (C155) AR (2)(3) I, II 16 MS20995C32 Safety wire (C014) AR (2) I, II Refer also to AMDI for the consumable materials required to comply with the AMP DM referenced in the accomplishment instructions. 3) LOGISTIC MATRIX In order to apply this Service Bulletin, the following Logistic P/N can be ordered in accordance with the applicable notes: ### Page 8 S.B. N°109SP-134 ALERT DATE: July 29, 2019 REVISION: / Page 7 of 14 LOGISTIC P/N Q.TY NOTE PART 709-039L1 1 (4) I, II 109-0760-42-105 1 (1) II NOTE (1) The indicated qty. is necessary for the inspection/replacement of one hydraulic pump. (2) Local supply. (3) The type of hydraulic fluid contained in the hydraulic system is recorded in the Aircraft Log Book. (4) This item must be requested only once. The materials will be sufficient both for the accomplishment of Part I and Part II on nr.1 and nr. 2 hydraulic systems. B. SPECIAL TOOLS Refer to ITEP for the special tools required to comply with the AMP DM referenced in the accomplishment instructions. C. INDUSTRY SUPPORT INFORMATION 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. NOTE: WRM will include RETURN MATERIAL AUTHORIZATION (RMA) number; the unit removed from the aircraft has to be returned to LHD as per instructions defined into LHD Information Letter GEN-15-047. ### Page 9 S.B. N°109SP-134 ALERT DATE: July 29, 2019 Page 8 of 14 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 re-use. b) Exposed thread surface and nut must be protected using a layer of tectyl according to MIL-C-16173 grade I. c) Refer to AMP Chapter 20 for the applicable standard torque values for threaded fasteners. d) All lengths are in mm. PART I 1. In accordance with 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 DM 0B-A-06-41-00-00A-010A-A, remove the access panels P15, P16 and/or P22 to gain access to the Number 1 and/or Number 2 hydraulic pump P/N 109-0760-42-103. WARNING HYDRAULIC FLUID IS A DANGEROUS MATERIAL. REFER TO DM 0B-A-00-50-00-00A-074A-D AND 0B-A-20-40-01-00A-010A-A FOR ALL THE SAFETY PRECAUTIONS, FIRST AID INSTRUCTIONS AND STANDARD PRACTICES. NOTE Step 3 is applicable only if the Ripple Damper Instl. kit P/N 109-0812-69-101 is installed on the helicopter. 3. In accordance with DM 0B-A-29-11-10-00A-520A-A an d/or 0B-A-29-12-10-00A-520A-A, and with reference to Figure 1 view A, remove the Number 1 and/or Number 2 ripple damper P/N 45427 or P/N 62587 and the O-ring P/N AS3581-906. Discard the O-ring. ### Page 10 S.B. N°109SP-134 ALERT DATE: July 29, 2019 REVISION: / Page 9 of 14 NOTE Put the applicable caps/plugs on all the line ends and open component ports immediately after the disconnection. 4. Put a container below the hydraulic pump to colle ct the hydraulic fluid. 5. With reference to Figure 1 view A, disconnect the indicated pressure hose, the return hose, the suction hose and the drain hose. 6. With reference to Figure 2 view B, remove n°4 washers P/N NAS1149D0416K and n°4 nuts P/N MS21042L4 that attach the hydraulic pump to the main transmission. Retain all the fixing hardware for later reuse. CAUTION • To remove the hydraulic pump P/N 109-0760-42-103, carefully move it axially to prevent damage of the shaft. • Remove immediately any trace of hydraulic fluid from the painted surfaces with dry soft lint-free cloth to prevent damage. 7. With reference to Figure 2 view B, remove the Num ber 1 and /or Number 2 hydraulic pump P/N 109-0760-42-103 and the relative gasket P/N AS3491-01. Discard the gasket. 8. Temporary install the applicable cover on the transmission drive quill to prevent its contamination. 9. With reference to Figure 2 detail C, clean the splines of the external drive shaft with cloth moistened with solvent. Dry the splines with the cloth. 10. Examine the spline of the external shaft P/N 45052 for wear, burrs and abrasion. Make sure that the spline outside diameter is greater than 18.410 mm. To do this use 2.438 mm diameter pins. 10.1 If the outside diameter is NOT in the specified limit, proceed with Part II of this Service Bulletin starting from Step 5. 10.2 If the outside diameter is in the specified limit, proceed with the next step. 11. Remove the cover installed at step 8 from the transmission drive quill. 12. With reference to Figure 2 view B and detail C, lubricate the external shaft spline P/N 45052, its seat on the main transmission drive quill and the new gasket P/N AS3491-01 with the grease. 13. With reference to Figure 2 view B, install the gasket P/N AS3491-01 in its position on the main transmission drive quill. ### Page 11 S.B. N°109SP-134 ALERT DATE: July 29, 2019 Page 10 of 14 REVISION: / CAUTION • Do not mix different types of hydraulic fluids. • The type of hydraulic fluid contained in the hydraulic system is recorded in the Aircraft Log Book. 14. Fill the Number 1 and/or Number 2 hydraulic pump with the hydraulic fluid. 15. With reference to Figure 2 view B, install the Number 1 and/or Number 2 hydraulic pump P/N 109-0760-42-103 on the main transmission using n°4 washers P/N NAS1149D0416K and n°4 nuts P/N MS21042L4. Torque the four nuts to 5.7 thru 7.9 Nm. 16. With reference to Figure 1 view A, connect the indicated pressure hose, the return hose, the suction hose and the drain hose. Tighten the hoses to the standard torque value. NOTE Step 17 is applicable only if the Ripple Damper Instl. kit P/N 109-0812-69-101 is installed on the helicopter. 17. In accordance with DM 0B-A-29-11-10-00A-720A-A a nd/or 0B-A-29-12-10-00A-720A-A, and with reference to Figure 1 view A, install the Number 1 and/or Number 2 ripple damper P/N 45427 or P/N 62587. 18. Perform a check of the hydraulic fluid level. If necessary, in accordance with DM 0B-A-12-11-02-00A-218A-A and/or 0B-A-12-11-03-00A-218A-A fill the Number 1 and/or Number 2 reservoir with hydraulic fluid. 19. In accordance with DM 0B-A-06-41-00-00A-010A-A, install the access panels P15, P16 and/or P22. 20. In accordance with DM 0B-A-29-11-02-00A-231A-A and/or 0B-A-29-12-02-00A-231A-A perform the Number 1 and/or Number 2 pump bleeding. 21. In accordance with DM 0B-A-29-11-00-00A-320A-A and/or 0B-A-29-12-00-00A-320A-A perform the Number 1 and/or Number 2 main hydraulic system operational test. 22. Return the helicopter to a ready to flight condition and record for compliance with Part I of this Service Bulletin on the helicopter logbook. 23. 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 12 S.B. N°109SP-134 ALERT DATE: July 29, 2019 REVISION: / Page 11 of 14 PART II 1. In accordance with 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 DM 0B-A-06-41-00-00A-010A-A, remove the access panels P15, P16 and/or P22 to gain access to the Number 1 and/or Number 2 hydraulic pump P/N 109-0760-42-103. WARNING HYDRAULIC FLUID IS A DANGEROUS MATERIAL. REFER TO DM 0B-A-00-50-00-00A-074A-D AND 0B-A-20-40-01-00A-010A-A FOR ALL THE SAFETY PRECAUTIONS, FIRST AID INSTRUCTIONS AND STANDARD PRACTICES. NOTE Step 3 is applicable only if the Ripple Damper Instl. kit P/N 109-0812-69-101 is installed on the helicopter. 3. In accordance with DM 0B-A-29-11-10-00A-520A-A an d/or 0B-A-29-12-10-00A-520A-A, remove the Number 1 and/or Number 2 ripple damper P/N 45427 or P/N 62587. 4. In accordance with DM 0B-A-29-11-02-00A-520A-A and/or 0B-A-29-12-02-00A-520A-A remove the Number 1 and/or Number 2 hydraulic pump P/N 109-0760-42-103. 5. In accordance with DM 0B-A-29-11-02-00A-521A-B and/or 0B-A-29-12-02-00A-521A-B return the Number 1 and/or Number 2 hydraulic pump P/N 109-0760-42-103 to the basic configuration. 6. In accordance with DM 0B-A-29-11-02-00A-721A-B and/or 0B-A-29-12-02-00A-721A-B build-up to the usable configuration the Number 1 and/or Number 2 hydraulic pump P/N 109-0760-42-105. 7. In accordance with the DM 0B-A-29-11-02-00A-720A-A and/or 0B-A-29-12-02-00A-720A-A install the Number 1 and/or Number 2 hydraulic pump P/N 109-0760-42-105. NOTE Step 8 is applicable only if the Ripple Damper Instl. kit P/N 109-0812-69-101 is installed on the helicopter. 8. In accordance with DM 0B-A-29-11-10-00A-720A-A an d/or 0B-A-29-12-10-00A-720A-A, and with reference to Figure 1 view A, install the Number 1 and/or Number 2 ripple damper P/N 45427 or P/N 62587. 9. Perform a check of the hydraulic fluid level. If necessary, in accordance with DM ### Page 13 S.B. N°109SP-134 ALERT DATE: July 29, 2019 Page 12 of 14 REVISION: / 0B-A-12-11-02-00A-218A-A and/or 0B-A-12-11-03-00A-218A-A fill the Number 1 and/or Number 2 reservoir with hydraulic fluid. 10. In accordance with DM 0B-A-06-41-00-00A-010A-A, install the access panels P15, P16 and/or P22. 11. In accordance with DM 0B-A-29-11-02-00A-231A-A and/or 0B-A-29-12-02-00A-231A-A perform the Number 1 and/or Number 2 pump bleeding. 12. In accordance with DM 0B-A-29-11-00-00A-320A-A and/or 0B-A-29-12-00-00A-320A-A perform the Number 1 and/or Number 2 main hydraulic system operational test. 13. Return the helicopter to a ready to flight condition and record for compliance with Part II of this Service Bulletin on the helicopter logbook. 14. 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”.  Non cancellare mai questo segnalibro Non cancellare mai interruzione sezione  ### Page 14 Figure 1 S.B. N°109SP-134 DATE: July 29, 2019 REVISION: / Page 13 of 14 A, B REMOVE: 45427 or 62587 RIPPLE DAMPER (REF) AS3581-906 O-RING INSTALL: 45427 or 62587 RIPPLE DAMPER (REF) AS3581-906 O-RING (TYP. OPPOSITE SIDE) TEMPORARILY DISCONNECT: PRESSURE HOSE (REF) RETURN HOSE (REF) SUCTION HOSE (REF) DRAIN HOSE (2 OFF)(REF) (TYP. OPPOSITE SIDE) VIEW A STRUCTURES AND SYSTEMS ARE PARTIALLY OMIT TED FOR BETTER CLARITY PURPOSE 109-0760-42-103 HYDRAULIC PUMP (REF) (TYP. OPPOSITE SIDE) ### Page 15 Figure 2 S.B. N°109SP-134 DATE: July 29, 2019 Page 14 of 14 REVISION: / REMOVE: NAS1149D0416K WASHER (4 OFF)(REF) MS21042L4 NUT (4 OFF)(REF) 109-0760-42-103 HYDRAULIC PUMP (REF) AS3491-01 GASKET INSTALL: NAS1149D0416K WASHER (4 OFF) (REF) MS21042L4 NUT (4 OFF) (REF) 109-0760-42-103 HYDRAULIC PUMP (REF) AS3491-01 GASKET TORQUE TIGHTEN 5.7÷7.9 Nm (TYP. OPPOSITE SIDE)VIEW B STRUCTURES AND SYSTEMS ARE PARTIALLY OMITTED FOR BETTER CLARITY PURPOSE DETAIL C 45052 EXTERNAL SHAFT (REF.) CLEAN WITH SOLVEN APPLY GREASE BEFORE INSTALLATION (TYP. OPPOSITE SIDE) DETAIL C APPLY GREASE ON SHAFT SEAT AND ON GASKET BEFORE REINSTALLATION OF THE HYDRAULIC PUMP (TYP. OPPOSITE SIDE) ### Page 16 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. Source documents are U.S. government works in the public domain, except the copies of manufacturers’ service documents, which belong to their rights holders.