Page 32 - Volume 12, Number 7

Technically...
From Multi-Engine Turboprop Communiqué # ME-TP-009
Date: June 2018
ATA 21 – Environmental Ducting Damage
Serial Numbers BB-1978, BB-1988 and after; BY-1 and after; BZ-1 and after; FL-493, FL-500 and after
The airplanes listed above are equipped with the Keith Products environmental system. This system has an automatic (AUTO) mode and a manual (MAN) mode. The system is designed to be operated in the AUTO mode as the system’s computer monitors temperatures, blower speeds and servo positions to keep the airflow and air temperature within the system limits to deliver the air to the cockpit and cabin based on the temperature selected by the crew. In the event of a system malfunction, the MAN mode can be used. However, all the functions that were taken care of by the system’s computer are now the responsibility of the crew.
Textron Aviation Technical Support has received reports of duct damage due to over temperature events.
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30 • KING AIR MAGAZINE JULY 2018