justApilot
Dawn Patroller
- Joined
- Jan 27, 2002
- Posts
- 346
Posted in todays AINONLINE.....
Emergency AD Addresses Beech 1900 Elevator Controls
All U.S. operators of Beech 1900s must perform control column sweep inspections on each of their airplanes to check for improperly rigged elevator control systems by tomorrow, according to an emergency AD issued Tuesday. The directive requires operators to ensure full elevator travel between the system’s primary up and down stops. If elevator travel does not meet specifications, the operator must re-rig the elevator control system. NTSB examination of the Air Midwest Beech 1900D involved in the January 8 fatal crash in Charlotte, revealed that the two elevator control cables, normally the same length, had been tightened unequally during previous maintenance. The turnbuckle on the down elevator cable was offset to nearly full extension and the turnbuckle on the up elevator cable was near the fully retracted position, a difference of 1.8 inches. For the airplane to cruise at altitude, as it did on the previous flights after maintenance, the elevator would have had to be near zero, but the pitch control position sensor indicated about 10 degrees down.
Emergency AD Addresses Beech 1900 Elevator Controls
All U.S. operators of Beech 1900s must perform control column sweep inspections on each of their airplanes to check for improperly rigged elevator control systems by tomorrow, according to an emergency AD issued Tuesday. The directive requires operators to ensure full elevator travel between the system’s primary up and down stops. If elevator travel does not meet specifications, the operator must re-rig the elevator control system. NTSB examination of the Air Midwest Beech 1900D involved in the January 8 fatal crash in Charlotte, revealed that the two elevator control cables, normally the same length, had been tightened unequally during previous maintenance. The turnbuckle on the down elevator cable was offset to nearly full extension and the turnbuckle on the up elevator cable was near the fully retracted position, a difference of 1.8 inches. For the airplane to cruise at altitude, as it did on the previous flights after maintenance, the elevator would have had to be near zero, but the pitch control position sensor indicated about 10 degrees down.
