SERVICE LETTER
Oil – Main Oil Pressure – Acceptable for Continued Use
1. Planning Information
A. Effectivity:
This document applies to the following Williams International turbofan engine(s):
ENGINE MODEL ENGINE PART ENGINE SERIAL
NUMBER NUMBER NUMBER(S)
FJ44-3A-24 75000-200 216368
B. Reason:
The above-listed engine experienced a main oil pressure minimum (MOP_MIN)
exceedance. Refer to Table 1.
C. Compliance:
Not Applicable.
D. Coverage:
Not Applicable.
E. Description:
Williams International has reviewed the data and deemed the engine to be
acceptable for continued use with the completion of the below tasks. This is a one-
time allowance for the event listed in Table 1.
F. Approval:
The technical content of this service document is FAA approved as applicable to the
engine models and serial numbers identified. It is the aircraft owner/operator
responsibility to coordinate with the appropriate aviation authority overseeing the
aircraft maintenance and operations, as required, prior to flight.
G. Manpower:
Not Applicable.
PROPRIETARY INFORMATION
All information and technical data disclosed herein are the property of Williams International and are not to be duplicated or
disclosed to others for any purpose without the written consent of Williams International, Pontiac, MI.
Original Release Date – Jun 11/25 WISL-79-1036
Revision 0 Page 1 of 5
SERVICE LETTER
H. Material:
Not Applicable.
I. Tooling Required:
Not Applicable.
J. Weight and Balance:
Not Applicable.
K. Electrical Load Data:
Not Applicable.
L. Software Configuration:
Not Applicable.
M. References:
FJ44-3A/3A-24 Line Maintenance Manual.
N. Other Publications Affected:
Not Applicable.
O. Family Tree Charts of Modification Relationships:
Not Applicable.
PROPRIETARY INFORMATION
All information and technical data disclosed herein are the property of Williams International and are not to be duplicated or
disclosed to others for any purpose without the written consent of Williams International, Pontiac, MI.
Original Release Date – Jun 11/25 WISL-79-1036
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SERVICE LETTER
2. Accomplishment Instructions
A. Inspect the magnetic chip collector in accordance with 79-30-01-601 of the FJ44-
3A/3A-24 Line Maintenance Manual.
B. Change the engine oil in accordance with 72-00-03-301 of the FJ44-3A/3A-24 Line
Maintenance Manual.
C. If the inspections and checks are within manual limits and no additional indications
are found, the engine is deemed acceptable for continued use by Williams
International.
D. Record the accomplishment of this service document in the engine logbook.
E. If work is not performed by Williams International, to ensure compliance is
documented, please complete the Certificate of Compliance and email to
WIProductSupport@williams-int.com.
PROPRIETARY INFORMATION
All information and technical data disclosed herein are the property of Williams International and are not to be duplicated or
disclosed to others for any purpose without the written consent of Williams International, Pontiac, MI.
Original Release Date – Jun 11/25 WISL-79-1036
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SERVICE LETTER
Table 1.
TYPE DURATION (SECONDS) DATE (MM/DD/YYYY) MOP (PSIG)
MOP_MIN 2594 06/06/2025 11
PROPRIETARY INFORMATION
All information and technical data disclosed herein are the property of Williams International and are not to be duplicated or
disclosed to others for any purpose without the written consent of Williams International, Pontiac, MI.
Original Release Date – Jun 11/25 WISL-79-1036
Revision 0 Page 4 of 5
SERVICE LETTER
CERTIFICATE OF COMPLIANCE
TO: Operator, Service Center, or Repair Center Performing Service Document
Please fill in the information requested below upon document completion ONLY for the engine(s) that this
document was complied with. Return this information to Williams International by scanning and emailing to
WIProductSupport@williams-int.com. If email is not available, please return by regular mail.
Williams International
2000 Centerpoint Parkway
Pontiac, MI 48341, USA
Attention: Product Support
Engine Engine A/C Serial
Part No. Model No. No.
75000-200 FJ44-3A 525A-0480
Engine Serial No. N/A 216368
No. 1 No. 2
Engine Time Since New N/A 2500:43
No. 1 No. 2
Engine Cycles Since New N/A 2031
No. 1 No. 2
Installed Component Part No. N/A 119281
No. 1 No. 2
Installed Component Serial No. N/A N/A
No. 1 No. 2
Installed Component Time Since
New N/A 0:00
No. 1 No. 2
Installed Component Cycles
Since New N/A 0
No. 1 No. 2
Date of Document Compliance: N/A 11-JUN-2025
No. 1 No. 2
I certify the following service document has been accomplished on the engine(s) indicated above and the
above information is accurate:
Service Document Title: Oil – Main Oil Pressure – Acceptable for Continued Use
Print Name: DALIBOR RAŠLJIĆ
Signature: Date: 11-JUN-2025
Title: MAINTENANCE MANAGER Representing: I2I-145 D.O.O.
PROPRIETARY INFORMATION
All information and technical data disclosed herein are the property of Williams International and are not to be duplicated or
disclosed to others for any purpose without the written consent of Williams International, Pontiac, MI.
Original Release Date – Jun 11/25 WISL-79-1036
Revision 0 Page 5 of 5
