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Airworthiness directives › 2014-02-03

AD 2014-02-03 Airworthiness Directives; Beechcraft Corporation Airplanes

2014-03-07
2014-01-31
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Airframe
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Applicability*9

This AD applies to the following Beechcraft Corporation airplanes in table 1 to paragraph (c) of this AD, certificated in any category: Table 1 to Paragraph (c) of This AD—Applicability 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. Paragraph (g) of this AD only applies to airplanes where the inspection required by AD 2011-27-51 (77 FR 2439, January 18, 2012) has not been done.

Required actions

Within the next 10 hours time-in-service (TIS) after January 18, 2012 (the effective date of AD 2011-27-51 (77 FR 2439, January 18, 2012)), inspect the elevator bob-weight installation for the following conditions specified in paragraphs (g)(1) through (g)(4) in this AD. Use Hawker Beechcraft Corporation Safety Communiqué No. 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. 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 No. 321, dated December 2011. (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 and allowing the attaching linkage to move over-center, which could lead to reduced nose down elevator control. Also, Beechcraft Corporation designed a secondary elevator bob-weight stop bolt to reduce the possibility of the bob-weight from traveling past the stop bolt. We are issuing this AD to prevent the elevator bob-weight (stabilizer weight) from traveling past its stop bolt and allowing the attaching linkage to move over-center and lead to reduced nose down elevator control, which could result in loss of control.

Affected ADs

This AD supersedes AD 2011-27-51, Amendment 39-16915 (77 FR 2439, January 18, 2012).

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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