# Leonardo Alert Service Bulletin 119-157: No revision named - Rights: © Leonardo S.p.A. Filed by the FAA in regulations.gov docket FAA-2025-5392, the docket of AD 2025-25-13. Not covered by OpenAirDocs’ CC0 dedication. - Document: [Leonardo Alert Service Bulletin 119-157](https://openairdocs.org/service-documents/leonardo/sb-119-157.md) - Title as filed: Leonardo Alert Service Bulletin 119-157 - Pages: 24 - PDF: https://openairdocs.org/files/sha256/2b/88/2b88bbc1b8cd45c44f81c9e37a4cee97a295bb1e595aba09049e5ec9aae7b657 - Page: https://openairdocs.org/service-documents/leonardo/sb-119-157/file/2b88bbc1b8cd ## 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 Pa ge 1 of 23 N° 119-157 DA TE: June 30, 2025 REV. : / - M arch 15, 2017 TITLE ATA 71 – TURBOSHAFT ENGINE PNEUMATIC LINE - INSPECTION/REPLACEMENT OF 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 ### Page 2 S.B. N°119-157 ALERT DATE: June 30, 2025 Page 2 of 23 REVISION: / 1. PLANNING INFORMATION A. EFFECTIVITY PART I and PART II: All the A119/AW119MKII helicopters that install engine P/N PT6B-37A with S/N reported in Table 1 of the Alert Service Bulletin P&WC S.B. No. A39125R1 (attached in Annex A). B. COMPLIANCE PART I: Within and not later than 10 (ten) flight hours from receipt of this Service Bulletin, and every 50 (fifty) flight hours thereafter until Part II is completed. PART II: Within and not later than 300 (three hundred) flight hours or 24 (twenty-four) months, whichever occurs first, from receipt of this Service Bulletin. C. CONCURRENT REQUIREMENTS N.A. D. REASON This Service Bulletin is consequence of Alert Service Bulletin P&WC S.B. No. A39125R1 (attached in Annex A) related to cleaning agent from Py line can go through the FCU and may lead to uncommanded fuel schedule changes such as accelerations, power rollbacks or instability. E. DESCRIPTION This Service Bulletin provides the necessary instructions in order to perform a regular acceleration checks ( PART I ) and examine Py lines and FCU Py input fitting for contamination and replace affected components if contamination is found ( PART II) in accordance with the Alert Service Bulletin P&WC S.B. No. A39125R1 (attached in Annex A). 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. ### Page 3 S.B. N°119-157 ALERT DATE: June 30, 2025 REVISION: / Page 3 of 23 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 LH 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 PART I and PART II: Refer to Alert Service Bulletin P&WC S.B. No. A39125R1 (attached in Annex A). H. WEIGHT AND BALANCE N.A. I. REFERENCES I.1 PUBLICATIONS Following Data Modules refer to pertinent RFM: SECTION/PARAGRAPH DESCRIPTION PART Section 02 Normal procedure I Following Data Modules refer to AMP: DATA MODULE DESCRIPTION PART DM01 19-A-00-20-00-00A-120A-A Helicopter safety - Pre- operation II Refer also to Alert Service Bulletin P&WC S.B. No. A39125R1 (attached in Annex A). I.2 ACRONYMS & ABBREVIATIONS AMP Aircraft Maintenance Publication DM Data Module DOA Design Organization Approval EASA European Aviation Safety Agency RFM Rotorcraft Flight Manual LH Leonardo Helicopters P/N Part Number ### Page 4 S.B. N°119-157 ALERT DATE: June 30, 2025 Page 4 of 23 REVISION: / S/N Serial Number I.3 ANNEX Annex A Alert Service Bulletin P&WC S.B. No. A39125R1. J. PUBLICATIONS AFFECTED N.A. K. SOFTWARE ACCOMPLISHMENT SUMMARY N.A. ### Page 5 S.B. N°119-157 ALERT DATE: June 30, 2025 REVISION: / Page 5 of 23 2. MATERIAL INFORMATION A. REQUIRED MATERIALS A.1 PARTS PART I and PART II: Refer to Alert Service Bulletin P&WC S.B. No. A39125R1 (attached in Annex A). A.2 CONSUMABLES PART I and PART II: Refer to Alert Service Bulletin P&WC S.B. No. A39125R1 (attached in Annex A). A.3 LOGISTIC MATRIX N.A. B. SPECIAL TOOLS PART I and PART II: Refer to Alert Service Bulletin P&WC S.B. No. A39125R1 (attached in Annex A). C. INDUSTRY SUPPORT INFORMATION For all materials information refer to: Pratt & Whitney Canada Corp. 1000, Marie-Victorin Longueuil, Québec, Canada J4G 1A1 Tél. 450-677-9411 ### Page 6 S.B. N°119-157 ALERT DATE: June 30, 2025 Page 6 of 23 REVISION: / 3. ACCOMPLISHMENT INSTRUCTIONS PART I 1. In accordance with the Section 02 – Normal Procedure reported in the pertinent A119/AW119MKII Rotorcraft Flight Manual, start the engine. 2. Perform Part A of the Alert Service Bulletin P&WC S.B. No. A39125R1 (attached in Annex A). 3. Record for compliance with PART I of this Service Bulletin on the helicopter logbook. 4. 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 ### Page 7 S.B. N°119-157 ALERT DATE: June 30, 2025 REVISION: / Page 7 of 23 PART II 1. In accordance with AMP DM 19-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. Perform Part B of the Alert Service Bulletin P&WC S.B. No. A39125R1 (attached in Annex A). 3. Return the helicopter to a ready to flight condition and record for compliance with PART II of this Service Bulletin on the helicopter logbook. 4. 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 ### Page 8 ANNEX A S.B. N°119-157 ALERT DATE: June 30, 2025 Page 8 of 23 REVISION: / ANNEX A ALERT SERVICE BULLETIN P&WC S.B. NO. A39125R1 ### Page 9 (OCR) ANNEX A K LEONARDO HELICOPTERS PRATT & WHITNEY CANADA ALERT SERVICE BULLETIN P&WC S.B. No. A39125R1 BULLETIN INDEX LOCATOR 72-00-08 TURBOSHAFT ENGINE PNEUMATIC LINE - INSPECTION/REPLACEMENT OF MODEL APPLICATION PT6B-37A Compliance: CATEGORY 3 Summary: Cleaning agent from Pneumatic line (Py) can go through the Fuel Control Unit (FCU) and may lead to uncommanded fuel schedule changes such as accelerations, power rollbacks or instability. Do regular acceleration checks. Nov 14/2024 PT6B-72-A39125 Revision No. 1: Apr 01/2025 Cover Sheet 24-Hour Global Service SA & CANAD........ ....1-800-268-8000 CFIRST CENTRE Internation... +800-268-8000 Toll free where available (SIL GEN-027) * Intemational Access Code Web Sit.......... .........www.pwc.ca Export Classification: This document contains no technical data S.B. N°119-157 ALERT DATE: June 30, 2025 REVISION: / Page 9 of 23 ### Page 10 (OCR) ANNEX A * LEONARDO HELICOPTERS WARNING - PROPRIETARY RIGHTS & EXPORT CONTROLS NOTICE This bulletin contains proprietary information of Pratt & Whitney Canada Corp. ("P&WC"), which P&WC provides in confidence and solely for the purposes of supporting engine certification and providing applicable information regarding the proper use, maintenance, inspection, repair, servicing and parts application of P&WC products and services, as directed therein. Neither this bulletin nor any information in it may be disclosed to others, or used for any other purpose, including, without limitation, to design, create, develop, reproduce, manufacture or derive any design, part, product, naterial, process, modification, configuration change or repair, or obtain FAA or other governmen approval to do so. Possession and use of this bulletin is also subject to the restrictions set out ir P&WC's Technical Data Agreement (a copy of which may be obtained by contacting P&WC Technical Publications). The contents of this bulletin may be subject to export control laws. Unauthorized export or re-export of the bulletin, or parts thereof, is prohibited. By accepting and possessing this bulletin, you agree to be bound by the foregoing terms. If a Government agency or department intends to disclose any information, written notice should be We Legal Services, Pratt & Whitney Canada Corp., 1000 Marie-Victorin (01BE5), Longueuil, Quebec J4G 1A1. Export Classification: This document contains no technical data S.B. N°119-157 ALERT DATE: June 30, 2025 Page 10 of 23 REVISION: / ### Page 11 (OCR) ANNEX A * LEONARDO HELICOPTERS Pratt & Whitney Canada Corp. Pratt & Whitney Canada 1000, Marie-Victorin Longueuil, Québec, Canada J4G 1A1 Tél. 450-677-9411 A United Technologies Company Apr 01/2025 P&WC S.B. No. A39125R1 REVISION TRANSMITTAL SHEET TURBOSHAFT ENGINE MODEL PT6B SUBJECT: Pratt & Whitney Canada Service Bulletin No. PT6B-72-A39125, Rev. No. 1 dated Apr 01/2025 (P&WC S.B. No. A39125R1) PNEUMATIC LINE - INSPECTION/ REPLACEMENT OF Replace your existing copy of this service bulletin with the attached revised bulletin. Destroy the superseded copy. Please retain this Revision Transmittal Sheet with the revised bulletin. SUMMARY: This revision is issued to: • modify the effectivity, • modity the description, • modity the compliance code, • correct Para. 1.M to read Not applicable, • introduce a Part A and a Part B accomplishment instructions. NOTE: Only changes to the technical content have a black bar in the margin. EFFECT OF REVISION ON PRIOR ACCOMPLISHMENT: None. REVISION HISTORY: Original Issue: Nov 14/2024 Revision No. 1: Apr 01/2025 Export Classification: This document contains no technical data S.B. N°119-157 ALERT DATE: June 30, 2025 REVISION: / Page 11 of 23 ### Page 12 (OCR) ANNEX A * LEONARDO HELICOPTERS Export Classification: This document contains no technical data S.B. N°119-157 ALERT DATE: June 30, 2025 Page 12 of 23 REVISION: / ### Page 13 (OCR) LEONARDO ANNEX A HELICOPTERS PRATT & WHITNEY CANADA ALERT SERVICE BULLETIN P&WC S.B. No. A39125R1 TURBOSHAFT ENGINE PNEUMATIC LINE - INSPECTION/REPLACEMENT OF 1. Planning Information A. Effectivity PT6B-37A Engines: • that have a Py line that was previously installed on an engine in Table 1 since its corresponding delivery date. • that have an FCU that was previously installed on an engine in Table 1 since its corresponding delivery date unless the FCU was overhauled or repaired prior to installation. B. Concurrent Requirements None. C. Reason (1) Problem Cleaning agent from Py line can go through the FCU and may lead to uncommanded fuel schedule changes such as accelerations, power rollbacks or instability. (2) Cause Cleaning procedure of rear Py line is not optimal during engine shop visit which can lead to residue trapped inside. (3) Solution • Regular acceleration checks. • Examine Py lines and FCU Py input fitting for contamination. Replace affected components if contamination is found. D. Description Do acceleration check. If maximum time exceeded, replace rear Py line and if FCU Py input fitting is found contaminated, replace FCU and clean front Py line and bulkhead coupling. Do the acceleration check again until rear Py line replacement. E. Compliance Part A: CATEGORY 3 - P&W recommends you to complete Part A of this service bulletin within 10 flight hours from receipt of this service bulletin and every 50 flight hours thereafter until Part B is completed. • P&WC No. ETI-0085910, ETI-0086688 Nov 14/2024 P&WC Proprietary Information. Subject to the restrictions on the back of the locator PT6B-72-A39125 Revision No. 1: Apr 01/2025 © 2024 Pratt & Whitney Canada Corp Page 1 of 11 PRINTED IN CANADA Export Classification: This document contains no technical data S.B. N°119-157 ALERT DATE: June 30, 2025 REVISION: / Page 13 of 23 ### Page 14 (OCR) ANNEX A K LEONARDO HELICOPTERS PRATT & WHITNEY CANADA ALERT SERVICE BULLETIN P&WC S.B. No. A39125R1 TURBOSHAFT ENGINE PNEUMATIC LINE - INSPECTION/REPLACEMENT OF 1. Planning Information (Cont'd) Part B: P&WC recommends you to complete Part B of this service bulletin within 300 flight hours or 24 months, whichever occurs first, from receipt of revision 1 of this service bulletin. F. Approval The technical content of this document is approved under the authority of the Transport Canada Civil Aviation (TCCA) Design Approval Organization No: DAO #93-Q-01. G. Manpower Once you have access to the part, an estimate of 1 man-hours is required to include this service bulletin at maintenance H. Weight and Balance None. Electrical Load Data Not applicable. J. Software Accomplishment Summary Not applicable. K. References Illustrated Parts Catalog P/N 3053104 (PT6B-37A). Maintenance Manual P/N 3053102 (PT6B-37A). Cleaning Inspection Repair Manual (CIR) P/N 3077280. Publications Affected None M. Interchangeability and Intermixability of Parts Not applicable. 2. Material Information A. Industry Support Information Not applicable. Nov 14/2024 P&WC Proprietary Information. Subject to the restrictions on the back of the locator PT6B-72-A39125 Revision No. 1: Apr 01/2025 Page 2 of 11 Export Classification: This document contains no technical data S.B. N°119-157 ALERT DATE: June 30, 2025 Page 14 of 23 REVISION: / ### Page 15 (OCR) ANNEX A * LEONARDO HELICOPTERS PRATT & WHITNEY CANADA ALERT SERVICE BULLETIN P&WC S.B. No. A39125R1 TURBOSHAFT ENGINE PNEUMATIC LINE - INSPECTION/REPLACEMENT OF 2. Material Information (Cont'd) B. Material - Price and Availability Not applicable. C. Material Necessary for Each Engine Not applicable. D. Reidentified Parts None. E. Tooling - Price and Availability Not Applicable 3. Accomplishment Instructions A. Part A: (1) Do acceleration check in accordance with the maintenance manual instructions with the differences that follow: • Ref. MM 71-00-00 POWER PLANT - ADJUSTMENT/TEST. (a) If acceleration check is found acceptable, do the check again every 50 flight hours. (2) Record the accomplishment of P&WC SB39125 Part A in the engine module log book. (3) If acceleration check exceeds maximum time, continue with Part B incorporation. B. Part B: (1) Replace the rear Py line (Ref. Fig. 1): • Ref. MM 72-00-08 PNEUMATIC LINES - MAINTENANCE PRACTICES. (2) Do an inspection of FCU Py input fitting on bottom of control for signs of contamination (Ref. Figure 2, Figure 3 and Figure 4) in accordance with maintenance manual instructions as follows: • Ref. MM 72-00-06 PNEUMATIC LINES - MAINTENANCE PRACTICES. (3) If contamination is found in the FCU Py input fitting on bottom of control, replace the FCU in accordance with maintenance manual instructions as follows: Nov 14/2024 P&WC Proprietary Information. Subject to the restrictions on the back of the locator PT6B-72-A39125 Revision No. 1: Apr 01/2025 Page 3 of 11 Export Classification: This document contains no technical data S.B. N°119-157 ALERT DATE: June 30, 2025 REVISION: / Page 15 of 23 ### Page 16 (OCR) ANNEX A * LEONARDO HELICOPTERS PRATT & WHITNEY CANADA ALERT SERVICE BULLETIN P&WC S.B. No. A39125R1 TURBOSHAFT ENGINE PNEUMATIC LINE - INSPECTION/REPLACEMENT OF 3. Accomplishment Instructions (Cont'd) • Ref. MM 72-00-06 FUEL CONTROL UNIT - MAINTENANCE PRACTICES. (4) Clean the front Py line and the bulkhead coupling in accordance with maintenance manual instructions as follows: • Ref. MM 72-00-08 PNEUMATIC LINES - MAINTENANCE PRACTICES. (5) If no contamination found, do the following in accordance with maintenance manual instructions as follows: • Ref. MM 71-00-00 POWER PLANT - ADJUSTMENT TEST. (a) Adjust acceleration in accordance with maintenance manual instructions. (b) Do acceleration check every 50 flight hours until 200 flight hours ‡10 is reached or until engine and FCU overhaul. (6) Record the accomplishment of P&WC SB39125 Part B in the engine module log book. (7) Send the completed feedback form (Ref. Fig. 5) by email to pwchelo@pwc.ca 4. Appendix Refer to Table 1 for suspect Engine Serial Numbers and associated date of shipment. Nov 14/2024 P&WC Proprietary Information. Subject to the restrictions on the back of the locator PT6B-72-A39125 Revision No. 1: Apr 01/2025 Page 4 of 11 Export Classification: This document contains no technical data S.B. N°119-157 ALERT DATE: June 30, 2025 Page 16 of 23 REVISION: / ### Page 17 (OCR) ANNEX A * LEONARDO HELICOPTERS PRATT & WHITNEY CANADA ALERT SERVICE BULLETIN P&WC S.B. No. A39125R1 TURBOSHAFT ENGINE PNEUMATIC LINE - INSPECTION/REPLACEMENT OF ICN-00198-G000146694-001-01 Rear Py Line and Bulkhead Coupling Tube Figure 1 Nov 14/2024 P&WC Proprietary Information. Subject to the restrictions on the back of the locator PT6B-72-A39125 Revision No. 1: Apr 01/2025 Page 5 of 11 Export Classification: This document contains no technical data S.B. N°119-157 ALERT DATE: June 30, 2025 REVISION: / Page 17 of 23 ### Page 18 (OCR) Ý LEONARDO ANNEX A HELICOPTERS PRATT & WHITNEY CANADA ALERT SERVICE BULLETIN P&WC S.B. No. A39125R1 JRBOSHAFT ENGIN VEUMATIC LINE - INSPECTION/REPLACEMENT C FCU PY FITTING FRONT PY LINE ICN-00198-G000144184-001-01 Front Py Line and FCU Figure 2 - Acceptable Condition Nov 14/2024 P&WC Proprietary Information. Subject to the restrictions on the back of the locator PT6B-72-A39125 Revision No. 1: Apr 01/2025 Page 6 of 11 Export Classification: This document contains no technical data S.B. N°119-157 ALERT DATE: June 30, 2025 Page 18 of 23 REVISION: / ### Page 19 (OCR) LEONARDO ANNEX A HELICOPTERS PRATT & WHITNEY CANADA ALERT SERVICE BULLETIN P&WC S.B. No. A39125R1 TURBOSHAFT ENGINE PNEUMATIC LINE - INSPECTION/REPLACEMENT OF CONTAMINATION CONTAMINATION ICN-00198-G000144185-001-01 FCU Py Fitting - Unacceptable Condition Figure 3 Nov 14/2024 P&WC Proprietary Information. Subject to the restrictions on the back of the locator PT6B-72-A39125 Revision No. 1: Apr 01/2025 Page 7 of 11 Export Classification: This document contains no technical data S.B. N°119-157 ALERT DATE: June 30, 2025 REVISION: / Page 19 of 23 ### Page 20 (OCR) ANNEX A * LEONARDO HELICOPTERS PRATT & WHITNEY CANADA ALERT SERVICE BULLETIN P&WC S.B. No. A39125R1 TURBOSHAFT ENGINE PNEUMATIC LINE - INSPECTION/REPLACEMENT OF ICN-00198-G000144182-001-01 FCU Py Fitting - Acceptable Condition Figure 4 Nov 14/2024 P&WC Proprietary Information. Subject to the restrictions on the back of the locator PT6B-72-A39125 Revision No. 1: Apr 01/2025 Page 8 of 11 Export Classification: This document contains no technical data S.B. N°119-157 ALERT DATE: June 30, 2025 Page 20 of 23 REVISION: / ### Page 21 (OCR) ANNEX A · LEONARDO HELICOPTERS PRATT & WHITNEY CANADA ALERT SERVICE BULLETIN P&WC S.B. No. A39125R1 TURBOSHAFT ENGINE PNEUMATIC LINE - INSPECTION/REPLACEMENT OF Acceleration Check and Inspection of the Py Lines and FCU Py Fitting fo Cleaning Agent Contamination SB39125 Date of Acceleration Check: DD/MM/YEAR Engine TSN and TSO: Successful? Yes _ No Date of Py Lines and FCU Py Fitting Inspectioon If Required DD/MM/YEAR Contamination Found? Yes No FCU P/N and S/N If Required: TSN and TSO of Unit: Date of Acceleration Adjustment If Required: DD/MM/YEAR Successful? Yes _ No ICN-00198-G000144173-001-01 Feedback Form Figure 5 Nov 14/2024 P&WC Proprietary Information. Subject to the restrictions on the back of the locator PT6B-72-A39125 Revision No. 1: Apr 01/2025 Page 9 of 11 Export Classification: This document contains no technical data S.B. N°119-157 ALERT DATE: June 30, 2025 REVISION: / Page 21 of 23 ### Page 22 (OCR) LEONARDO ANNEX A HELICOPTERS PRATT & WHITNEY CANADA ALERT SERVICE BULLETIN P&WC S.B. No. A39125R1 TURBOSHAFT ENGINE PNEUMATIC LINE - INSPECTION/REPLACEMENT OF 4. Appendix (Cont'd) TABLE 1, Suspect Engine Serial Numbers and Associated Date of Shipment Engine S/N Date of Shipment Engine S/N Date of Shipment PCE-PU0008 2020-10-29 PCE-PU0134 2021-03-31 PCE-PU0017 2023-10-26 PCE-PU0138 2017-06-23 PCE-PU0019 2015-10-17 PCE-PU0139 2020-03-01 PCE-PU0020 2019-09-26 PCE-PU0140 2016-02-23 PCE-PU0021 2020-12-19 PCE-PU0142 2022-02-24 PCE-PU0024 2019-03-22 PCE-PU0143 2019-07-03 PCE-PU0025 2016-03-22 PCE-PU0156 2020-01-30 PCE-PU0028 2022-10-01 PCE-PU0158 2022-02-01 PCE-PU0030 2019-10-01 PCE-PU0160 2023-09-23 PCE-PU0034 2014-04-24 PCE-PU0161 2021-12-30 PCE-PU0036 2015-12-04 PCE-PU0164 2017-03-16 PCE-PU0038 2018-11-28 PCE-PU0174 2023-08-26 PCE-PU0043 2020-06-03 PCE-PU0175 2022-03-31 PCE-PU0050 2024-03-14 PCE-PU0184 2018-06-22 PCE-PU0057 2021-01-30 PCE-PU0188 2021-11-01 PCE-PU0061 2017-05-20 PCE-PU0193 2022-12-13 PCE-PU0064 2024-01-26 PCE-PU0196 2023-09-01 PCE-PU0065 2023-06-09 PCE-PU0204 2023-06-30 PCE-PU0071 2019-05-10 PCE-PU0207 2023-02-09 PCE-PU0072 2015-08-28 PCE-PU0208 2015-09-26 PCE-PU0075 2018-05-09 PCE-PU0211 2022-12-24 PCE-PU0077 2020-07-01 PCE-PU0216 2023-11-30 PCE-PU0083 2014-11-28 PCE-PU0219 2023-09-28 PCE-PU0084 2019-02-27 PCE-PU0221 2023-09-15 PCE-PU0086 2019-02-28 PCE-PU0228 2023-04-15 PCE-PU0089 2020-08-08 PCE-PU0235 2024-05-14 PCE-PU0093 2020-07-30 PCE-PU0236 2021-01-26 Nov 14/2024 P&WC Proprietary Information. Subject to the ns on the back of the locator PT6B-72-A39125 Revision No. 1: Apr 01/2025 Page 10 of 11 Export Classification: This document contains no technical data S.B. N°119-157 ALERT DATE: June 30, 2025 Page 22 of 23 REVISION: / ### Page 23 (OCR) LEONARDO ANNEX A HELICOPTERS PRATT & WHITNEY CANADA ALERT SERVICE BULLETIN P&WC S.B. No. A39125R1 TURBOSHAFT ENGINE PNEUMATIC LINE - INSPECTION/REPLACEMENT OF 4. Appendix (Cont'd) TABLE 1, Suspect Engine Serial Numbers and Associated Date of Shipment (Cont'd) Engine S/N Date of Shipment Engine S/N Date of Shipment PCE-PU0094 2022-06-16 PCE-PU0247 2024-07-01 PCE-PU0097 2018-07-14 PCE-PU0250 2018-03-21 PCE-PU0098 2022-11-15 PCE-PU0274 2021-03-26 PCE-PU0104 2019-04-25 PCE-PU0288 2020-05-28 PCE-PU0107 2019-12-12 PCE-PU0311 2020-02-29 PCE-PU0120 2017-06-01 PCE-PU0352 2023-12-12 PCE-PU0129 2016-06-15 PCE-PU0363 2024-03-13 PCE-PU0131 2021-01-22 PCE-PU0389 2024-03-06 Note: Deleted Nov 14/2024 P&WC Proprietary Information. Subject to the restrictions on the back of the locator PT6B-72-A39125 Revision No. 1: Apr 01/2025 Page 11 of 11 Export Classification: This document contains no technical data S.B. N°119-157 ALERT DATE: June 30, 2025 REVISION: / Page 23 of 23 ### Page 24 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.