From Multi-Engine Prop Communiqué

Issued: June 2020

ATA 25 – AmSafe Crew Seat Belts Connector Web Slide Insert

Aircraft equipped with AmSafe Crew Seat Belts

AmSafe has issued Service Letter SL279213 to call attention to the belt connector half assembly tongue web slide where the web slide has been found to be cracked, damaged or missing (see picture below). The Service Letter provides instructions on how to replace the tongue web slide insert.

In addition to the Service Letter, AmSafe has also issued a no tech­nical objection (NTO) letter allowing operation with the tongue web slide broken or missing.

You may obtain the Service Letter or the NTO letter by contacting AmSafe at

ATA 56 – Windshield Surface Seal Update


PPG, the supplier of the air­craft cockpit windshields, has reformulated the Surface Seal® Gen II coating to the Surface Seal® Gen III. The purpose of the coating is to provide improved water shedding performance during precipitation conditions. The formulation change was introduced because of PPG’s commitment to providing environmentally sustainable products and evolving regulation while not reducing the water shedding performance.

On June 1, 2020, the existing Surface Seal® Gen II coating will become obsolete. After this date PPG will provide only the new Surface Seal® Gen III coating whether it be for spare windshields or PPG kits used for refurbishing the coating. Any stock of spare windshields and existing Surface Seal® Gen II kits can continue to be used until the supplies are exhausted. If after June 1 you place an order with Textron for the existing Surface Seal® Gen II kit the new Surface Seal® Gen III kit will be provided instead.

The Aircraft Maintenance Manual (AMM) is being revised to address the change, but this communiqué provides the necessary information before the revision will be available. SEE ENTIRE COMMUNIQUE for specific information at

ATA 61 – Hartzell Propeller Grease Change


Hartzell Propeller Inc. has announced, via Service Letter HC-SL-61-366, a change to the grease used on these propellers. The new grease is NYCO GN3058. Textron Aviation recommends that you refer to this Service Letter available from Hartzell Propellers Inc. Textron Aviation will be making the necessary changes to the applicable King Air, 99 Airliner and 1900 Airliner maintenance manuals to reflect this change.

The information provided in this column may be abbreviated for space purposes. For the entire communication, go to:

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