Document ID: chunk:federal_register_of_legislation:F2006B03925:body:0:p6
Version: federal_register_of_legislation:F2006B03925
Segment Type: other
Provision Reference: 
Character Range: 15430–17530

Airspeed - Accelerate to 0.3 AOA
33.     Flaps - 0 deg.
                  34.     Airspeed - Accelerate and Maintain 0.2 AOA
35.     Landing Lights - Ret/off''

           Note 1: When a previously specified Temporary AFM revision has been incorporated into the general revisions of the AFM, the general revision may be inserted in the AFM, provided the information contained in the general revision is identical to that specified in the specified Temporary AFM revision.

           Note 2: FAA AD 2001-24-11 Amdt 39-12528

 Compliance: Within five days after the effective date of this Directive.

           This Airworthiness Directive becomes effective on 11 December 2001.

           Background:  The United States Federal Aviation Administration has received several reports of loss of the pilot's and/or the co-pilot's Indicated Airspeed (IAS) display on certain Raytheon Model Beech 400A series aeroplanes. Such loss of IAS display may lead to loss of the altitude displays and up to 10 degrees of pitch error in the pilot's and/or co- pilot's attitude display. Loss of the IAS display can also adversely affect the display for altitude and attitude (Attitude/Heading/Reference System) and can result in uncommanded autopilot or yaw damper disengagement. The reported incidents occurred between 38,000 and 41,000 feet of altitude while the airplanes were in cruise or during initial descent. In the reported incidents, the altitude indication returned to normal at an undetermined point in the descent, and the airplanes landed without further incident. Investigation of those reports indicates that the cause of the loss of airspeed indication display may be due to water freezing in the pitot systems.

           This Directive requires revision of the AFM Emergency Procedures Section to ensure the flightcrew is advised of in-flight procedures in the event of loss of airspeed indication.

 Eugene Paul Holzapfel
 Delegate of the Civil Aviation Safety Authority 7 December 2001

 The above AD is notified in the Commonwealth of Australia Gazette on 11 December 2001.