Airworthiness directives › 2011-27-51
AD 2011-27-51 Airworthiness Directives; Hawker Beechcraft Corporation Models 1900, 1900C, and 1900D Airplanes
Makes named: hawker beechcraft. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to the following Hawker Beechcraft Corporation airplanes, certificated in any category: Models Serial Nos. (1) 1900 UA-3. (2) 1900C UB-1 through UB-74 and UC-1 through UC-174. (3) 1900C (Military) UD-1 through UD-6. (4) 1900D UE-1 through UE-439.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within the next 10 hours time-in-service after January 18, 2012 (the effective date of this AD), inspect the elevator bob-weight installation for the following conditions. Use Hawker Beechcraft Corporation Safety Communiqué #321, dated December 2011. Note: The term “nose down” corresponds to the airplane nose down, down elevator, and control column forward position as used in this AD and Hawker Beechcraft Corporation Safety Communiqué #321, dated December 2011. (1) The correct positioning of the elevator control column link assembly, (part number (P/N) 101-524112-1 (1900/1900C) or P/N 101-524112-5 (1900D)). With the elevator control column in the full nose down position (control column forward), the link must form an angle between the link attachment point at the control column and the bell crank pivot point as shown in the Hawker Beechcraft Corporation Safety Communiqué photo labeled “Correct Link Orientation.” The link should be trailing aft from the control column assembly. (2) The clearance of the bob-weight stop bolt. With the elevator control column in the full nose down position (control column forward), the stabilizer weight stop bolt must have positive clearance with the face of the stabilizer weight. (3) The condition of the bob-weight and alignment with the stop bolt. Inspect for evidence of scraping along either side of the weight by the stop bolt. With side pressure applied by hand to the stabilizer weight, no part of the stop bolt should protrude beyond the face of the stabilizer weight on either edge. (4) The condition of the bob-weight support bracket. Inspect for evidence of damage or deformation by contact with the weight assembly.
Unsafe condition
This AD was prompted by reports of the elevator bob-weight (stabilizer weight) traveling past its stop bolt, which allowed the attaching linkage to move over-center. We are issuing this AD to detect and correct conditions that could result in reduced nose down elevator control and loss of control of the airplane.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1