Document ID: chunk:federal_register_of_legislation:F2005L00586:body:0:p1
Version: federal_register_of_legislation:F2005L00586
Segment Type: other
Provision Reference: 
Character Range: 0–3208

AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.001(1) of CASR 1998.  The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Beechcraft 1900 Series Aeroplanes
AD/BEECH 1900/46  Aircraft Flight Manual - Flight  4/2005
                  Into Icing Conditions

Applicability:  Raytheon / Beech Aircraft Corporation (Beech) Models 1900, 1900C and 1900D Aircraft.
Requirement:       1. Revise the Limitations Section of the aircraft's Aircraft Flight Manual (AFM) by incorporating the following:

                "WARNING

                       * Severe icing may result from environmental conditions outside of those for which the airplane is certificated.  Flight in freezing rain, freezing drizzle, or mixed icing conditions (supercooled liquid water and ice crystals) may result in ice build-up on protected surfaces exceeding the capability of the ice protection system, or may result in ice forming aft of the protected surfaces.  This ice may not be shed using the ice protection systems, and may seriously degrade the performance and controllability of the airplane.

                       * During flight, severe icing conditions that exceed those for which the airplane is certificated shall be determined by the following visual cues.  If one or more of these visual cues exists, immediately request priority handling from Air Traffic Control to facilitate a route or an altitude change to exit the icing conditions.

                               + Unusually extensive ice accreted on the airframe in areas not normally observed to collect ice.

                               + Accumulation of ice on the upper surface of the wing aft of the protected area.

                               + Accumulation of ice on the propeller spinner farther aft than normally observed.

                       * Since the autopilot may mask tactile cues that indicate adverse changes in handling characteristics, use of the autopilot is prohibited when any of the visual cues specified above exist, or when unusual lateral trim requirements or autopilot trim warnings are encountered while the airplane is in icing conditions.

          * All icing detection lights must be operative prior to flight into icing conditions at night.  This supersedes any relief provided by any Minimum Equipment List "

      2. Revise the Procedures Section of the aircraft's AFM by incorporating the following:

   "THE FOLLOWING WEATHER CONDITIONS
   MAY BE CONDUCIVE TO SEVERE IN-FLIGHT ICING:

          * Visible rain at temperatures below 0 degrees Celsius ambient air temperature.

          * Droplets that splash or splatter on impact at temperatures below