Airworthiness Directive · Amendment 39-16915 · Flight controls
Hawker Beechcraft Corporation Models 1900, 1900C, and 1900D Airplanes
Superseded. A later AD replaced this one: AD 2014-02-03. Comply with the one in force.
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. |
We are adopting a new airworthiness directive (AD) for certain Hawker Beechcraft Corporation Models 1900, 1900C, and 1900D airplanes. This emergency AD was sent previously to all known U.S. owners and operators of these airplanes. This AD requires inspecting the elevator bob-weight and attaching linkage for correct installation and for damage or deformation to the weight and/or weight bracket with corrective action as necessary. 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, resulting in reduced nose down elevator control, which could result in loss of control of the airplane. 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.
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.
If any discrepancies are found in the inspections required in paragraph (g) of this AD, before further flight, do the following:
(1) Contact Hawker Beechcraft Corporation Technical Support by telephone at (800) 429-5372 or (316) 676-3140 to obtain FAA-approved repair or replacement instructions.
(2) Incorporate the repair or replacement specified in the FAA-approved instructions.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
