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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
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.
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 - Preoperation 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
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.
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
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
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
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
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
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: /
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
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: /