The problem, however, was actually in a motor that adjusts the tail, controlling the up and down pitch of the plane, a part "critical to the safety of flight," the F.A.A. said.
A malfunction in the airplane's tail control system caused the crash of a Provincetown-Boston Airline commuter flight in Florida that killed 13 people, Federal officials concluded today.
But adding a movable tail controlled by a gyroscope that sensed the car's fall kept the vehicle's nose up, allowing it to land on its tires (see video).
Our data also suggested that miRNA-mediated regulation can be modulated on specific target mRNAs through the poly(A) tail control.
Many VSPs are palmitoylated [ 43, 44], and in vivo, palmitic acid binds specifically to the cysteine of the CRGKA tail controlling segregation of the VSPs to the detergent-resistant domains within the plasma membrane [ 45].
The scores were on a scale of 0 to 9 (9 = normal locomotion; 0 = complete hind limb paralysis), which is based on hind limb movements made in an open field including hind limb joint movement, weight support, plantar stepping, coordination, paw position, and trunk and tail control.
Alaska Airlines began using Aeroshell 33 in January 1998 and by August of that year had used it on the tail-control mechanism of all its MD-80's.
When the tail-control mechanism was pulled out of the Pacific, investigators found that the thread on a crucial nut was stripped.
Investigators say the plane, an MD-80 that crashed off the Los Angeles coast on Jan . 31on a flight from Puerto Vallarta, Mexico, to San Francisco, was using a grease that may have broken down the metal in the tail-control mechanism.
