The installed Dorsal does not allow dispersion of moisture that builds up in the cavity between the Dorsal and the fuselage, which leads to corrosion on the fuselage skin under the Dorsal. This kit includes a system of parts to be installed under the Dorsal to provide channels for moisture to drain out of the cavity.
This Custom Kit privides an approved modification to the Beta Pressure System. The addition of a restriction before the Beta Pressure Switch will dampen pressure fluctuations in the system, eliminating the Beta pressure Indicator Light to flicker in flight and is effective for all 690, 690A, and 690B models
To provide approval and instruction for long seat rails on the left side for passenger convenience. For Models: 680FL, 680T, 680W, 681, 685, 690, 690A, 690B, 690C, and 695.