Alaska Airlines Flight 261
Flight 261 left Puerto Vallarta at 14:30 PST. While en-route to San Francisco, the crew became aware of a horizontal stabilizer jam and kept Alaska Airlines maintenance informed of the issue while airborne at FL310. Captain Tansky tried a solution to unjam the stabilizer. The stabilizer unjammed and the aircraft assumed an extreme nose down attitude. Both pilots applied back pressure to their controls and recovered from the dive at FL260. The flight crew contact Los Angeles ARTCC to tell them that they are descending through FL260.