ATA 56

Windows, Direct Vision:

It has been brought to our attention that some of the DV windows installed in the Westwind fleet are showing signs of cracking / splitting / delaminating on the laminar plane. Part numbers affected are 343017-409, 343017-452 and 343017-97. Please inspect the window for cracking / splitting / delamination along the edge. The seal may have to be removed to see it clearly. Although the DV window is not specifically mentioned in the current revision of the AMM, IAI has determined that if there is this sort of deficiency in the window, it must be replaced. Please see the attached pictures of a window with delamination (dye penetrant was used to clearly show the separation)

ATA 71

TFE 731 Engines:
We have been notified that the FAA has proposed a new AD in regard to the Honeywell TFE731 Turbofan engines that are in operation in the Westwind 1124 aircraft. Please go to the following link to read the released information from Honeywell.

HON Airworthiness Directives; Honeywell International Inc. TFE731 ...

(FAA-2009-0331, Directorate Identifier 2008-NE-40-AD)

ATA 27

Flight Controls:
On February 2nd 2009, IAI released the CAA approved Service Bulletin 1124-27-156. This bulletin is for the replacement of the left and the right aileron control rod assemblies. To see and download this SB follow this link; http://www.worthingtonav.com/downloads/24sb-156.pdf.

The parts required to accomplish this service bulletin can be purchased from Worthington Aviation Parts Inc. They can be purchased in a kit, Part No. 1124-27-126 Kit or individually, Part No. 513020-503. Please contact the Westwind Sales team at 877-833-2942 or fax at 651-393-3308.