Safety Communiqué No. 3 2 1 1 of 2 The export of these commodities, technology or software are subject to the US Exp ort Administration Regulations. Diversion contrary to U.S. law is prohibited. For guidance on export control requirements, contact the Commerce Department’s Bureau of Export Administration at 202
- 482
- 4811 or at www.bxa .doc.gov

. December 20 11

TO: ALL OWNERS AND OPERATORS, HAWKER BEECHCRAFT SERVICES, CHIEF PILOTS, DIRECTORS OF OPERATIONS, DIRECTORS OF MAINTENANCE, ALL HAWKER BEECHCRAFT AUTHORIZED SERVICE CENTERS, AND INTERNATIONAL DISTRIBUTORS AND DEALERS
. MO DELS: All 1900 Models, Serials UA - 3; UB - 1 through UB - 74; UC - 1 through UC - 174; UD - 1 through UD - 6; UE - 1 through UE - 439. SUBJECT: REPORT OF ELEVATOR CONTROL RESTRICTION Hawker Beechcraft Corporation (HBC) has received two (2) reports of the elevator contro l system having limited nose
- down control during takeoff. In this system, link assembly P/N 101
- 524112 connects the control column to the elevator bob
- weight bellcrank. This link assembly, in each case, was reported to be overcenter, thereby restricting elevator travel.

Correct Link Orientation Incorrect Link OrientationSafety Comm uniqué No. 3 2 1 2 of 2 The export of these commodities, technology or software are subject to the US Export Administration Regulations. Diversion co ntrary to U.S. law is prohibited. For guidance on export control requirements, contact the Commerce Department’s Bureau of Export Administration at 202
- 482
- 4811 or at www.bxa.doc.gov

. The overcenter condition may be facilitated by a misrigged secondary stop and/or excessively worn components in the elevator control system. One report revealed damage to the P/N 11 4
- 524061
- 21/
- 35 support structure containing the elevator bob
- weight, allowing additional travel of the bob
- weight.

Bellcrank/Bob - Weight Damage The second report revealed an elongated bob
- weight bellcrank pivot hole in the P/N 114
- 524061
- 35 support str ucture. Therefore, it is important to inspect all associated components for any abnormal wear or conditions per the requirements in the Maintenance Manual (MM), Chapter 5. If rigged correctly, the elevator control bob
- weight will have a 0.56 +0/
- 0.12 (0.4 4 to 0.56) inch clearance to the stop bolt when resting on the down elevator primary stop. If the airplane is parked or moored outside, control locks must be installed as described in the MM. When using the control locks, refer to Safety Communiqué No. 1, which was re
- released in March of 2008. Airliner 1900 Series Model Communiqué No. 91 stresses the importance of using control locks and following all cautions and warnings in the MM, and includes the following statement: “CAUTION: With the control col umn pulled to the aft position, allowing the control column to free
- fall to the forward position can cause damage to the elevator system.” Mandatory Service Bulletin 27
- 3739, Flight Controls
- Flight Control Column Link Assembly Inspection/Modification, p rovides instructions to inspect the link assembly and modify the installation to prevent the bearing from separating from the link assembly. Application of proper elevator control system rigging, parking and mooring procedures, as defined in the MM, is essential to ensure that the system operates as designed. Proper application of defined airplane parking and mooring procedures ensures that the system is protected from abnormal forces, such as jet blast, wind gusts, or improper handling. HBC has perf ormed testing on the Model 1900 elevator control system and could not duplicate the reported condition. For technical questions, please contact Hawker Beechcraft Corporation Technical Support at 1
- 800
- 429
- 5372 or 316
- 676
- 3140

.