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The U.S. NASA Aviation Safety Program [2] [3] defines upset prevention and upset recovery as to prevent loss-of-control accidents due to aircraft upset after inadvertently entering an extreme or abnormal flight attitude. A Boeing-compiled list determined that 2,051 people died in 22 accidents in the years 1998–2007 due to LOC accidents. [1]
One mnemonic for upset recovery is "UPRT": Upset; Push; Roll; Thrust; On noticing an unusual flight condition, the pilot should first reduce the thrust, and push forward on the yoke to unstall the aircraft. An aircraft cannot be stalled at zero g. [8] The pilot should then roll the shortest way to the horizon. Finally thrust can be increased ...
Recovery – With appropriate control inputs, the yaw rotation is slowed or stopped and the aircraft nose attitude is lowered, thus decreasing the wing's angle of attack and breaking the stall. Airspeed increases quickly in a nose low attitude and the aircraft is no longer in a spin.
China Airlines Flight 006 (call sign "Dynasty 006") was a daily non-stop flight from Taipei to Los Angeles International Airport. On February 19, 1985, the Boeing 747SP operating the flight was involved in an aircraft upset accident , following the failure of the No. 4 engine, while cruising at 41,000 ft (12,500 m).
A Delta plane flies by the wreckage of Delta Flight 191 the day after the Aug. 2, 1985, crash. ... during an attempted recovery from an unusual attitude induced by turbulence associated with a ...
Mechanics of turning flight; Lateral and directional maneuvering; Flight at extremely low airspeeds; High-altitude factors; Stall; icing; Automation during high-altitude flight; Primary flight display airspeed indications; Human factors and high altitude upsets; Additional considerations: Multi-engine flame out; Core lock; Engine rollback ...
A final approach over a downsloping terrain with a flat runway, or to an unusually wide runway may produce the visual illusion of being too low on final approach. The pilot may then pitch the aircraft's nose up to increase the altitude, which can result in a low-altitude stall or a missed approach. [13]: 2, 3
These are collectively known as aircraft attitude, often principally relative to the atmospheric frame in normal flight, but also relative to terrain during takeoff or landing, or when operating at low elevation. The concept of attitude is not specific to fixed-wing aircraft, but also extends to rotary aircraft such as helicopters, and ...