TX56/56A and TX57/57A Installation Manual
5 April 2022
01776-00-01
Issue AD
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Trig Avionics
Page 63
9. Continued Airworthiness
Other than for periodic functional checks required by the regulations, the
TX56/TX57 Nav/Com has been designed and manufactured to allow “on
condition maintenance”. This means that there are no periodic service
requirements necessary to maintain continued airworthiness, and no
maintenance is required until the equipment does not properly perform its
intended function. When service is required, a complete performance test
should be accomplished following any repair action. Repairs should only be
carried out in accordance with Trig Avionics service procedures.
9.1 Cleaning the Front Panel
The front panel body and switches should be cleaned with a soft cotton cloth
moistened with clean water. The LCD screen should be lightly cleaned with a
lint free cloth taking care not to scratch the surface.