![Citation CJ4](https://www.weststaraviation.com/wp-content/uploads/2024/05/citation_cj4.jpg)
![Citation CJ4](https://www.weststaraviation.com/wp-content/uploads/2024/05/citation_cj4_th-768x403.jpg)
Operate a CJ4? Textron has issued SB525C-56-01 to reduce the occurrence of corrosion around the windshields and side windows on Citation 525C (CJ4) aircraft.
The service bulletin outlines inspection steps along with preventative procedures. The process includes adding new ground plates and sealing the area around the frames of the windshield and side windows to decrease the potential for moisture intrusion.
As of now, the SB is recommended, but operators should be vigilant with regular inspection of the aircraft or have their MRO check while in for other maintenance or service.
West Star Aviation Citation Specialists have reported having an increasing number of Citation operators asking about the Service Bulletin. This issue will no doubt increase in frequency as the fleet ages, so the preventative effort may be money well spent.
Take note — SB525C-6-01 can only be performed by a Textron Authorized Service Center. West Star Aviation’s East Alton IL (ALN); Grand Junction, CO (GJT); and Chattanooga, TN (CHA) are Independent Textron Authorized Service Centers.
For more information on the above service bulletin, or any of the other Citation-specific services offered by West Star Aviation, please contact one of the specialists below:
![Pat Welch](https://www.weststaraviation.com/wp-content/uploads/2016/09/welch-pat.jpg)
Pat Welch
Technical Sales Manager
(ALN)
Cell: 618.604.7008
pwelch@wsa.aero
![Sean Ertz](https://www.weststaraviation.com/wp-content/uploads/2023/09/sean_ertz.jpg)
Sean Ertz
Technical Sales Manager (CHA)
Cell 423.681.8594
sertz@wsa.aero
![Jerry Sheetz](https://www.weststaraviation.com/wp-content/uploads/2016/09/sheetz-jerry.jpg)
Jerry Sheetz
Manager of Technical Sales (GJT
Office 970.683.4852
jsheetz@wsa.aero
![Jeff Messmer](https://www.weststaraviation.com/wp-content/uploads/2018/01/messmer-jeff.jpg)
Jeff Messmer
Technical Sales Manager
(PCD)
Cell 314.607.4069
jmessmer@wsa.aero
![Raymond Sharp](https://www.weststaraviation.com/wp-content/uploads/2024/01/raymond_sharp.jpg)
Raymond Sharp
Program Manager, Citation
(ALN)
Cell: 6188180146
rsharp@wsa.aero
![Todd Hyatt](https://www.weststaraviation.com/wp-content/uploads/2022/01/Todd-Hyatt-1-_MG_2847-Copy1.jpg)
Todd Hyatt
Textron Program Manager
(CHA)
Cell 407.414.3662
thyatt@wsa.aero
![Jay Wand](https://www.weststaraviation.com/wp-content/uploads/2022/08/jay_wand.jpg)
Jay Wand
Program Manager
Cell: 618.796.0398
jwand@wsa.aero
![](https://www.weststaraviation.com/wp-content/uploads/2016/09/warren-aaron.jpg)
Aaron Warren
Program Manager, Citation
(GJT)
Cell 970.261.9340
awarren@wsa.aero
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