Aircraft have 4 main vectors applying to them in flight:
Horizontal: thrust vs drag
Vertical: lift vs weight (gravity)
If horizontal vectors are equalized at zero you got a hover (helicopter). If the vectors are equalized with some magnitude, you have steady state forward flight.
If vertical vectors are equalized you maintain altitude (don't climb or descend).
All four vectors are always present. Thus if you are the pilot of an aircraft that is losing altitude (vertical vectors imbalanced: weight is greater than lift) and enter a turn you worsen the situation because now you have caused an imbalance in your horizontal vectors. This is not always 100% true, depending on the wind direction, but ultimately if you are in a power limited situation (losing altitude) and you turn, you are going to lose altitude at a greater rate.
That being said, there are several reasons you might want to turn even in a power limited situation. Turning to avoid obstacles being the first, turning towards a more favorable wind direction being the second.
I'll be the last person to second guess pilot actions until a full report is done. But so far all indications point to a high, hot, heavy aircraft experiencing flight control issues. The captain did whatever he thought was going to fix the situation, but sometimes you have no action that will save the aircraft.
Ship captains like to pride themselves with always going with the ship. That is a choice and is not always true. Pilots always go down with their aircraft that is a rule of law (sure....minus the nerds with ejection seats and parachutes...)
edit - just for relevance, this is why the reported "pitch down" on takeoff problems causes problems. Takeoff is the most dangerous situation to be in. You are heavy (full load/full gas) with full power requirements needed to accelerate and gain altitude. If the aircraft pitches down, the vertical lift vector is immediately reduced causing increased power requirements.
A rule is thumb is you have three things working for you as a pilot: airspeed, altitude, or power. You need two of those to survive. When you get down to one, its all over. But at least you will beat the emergency services to the crash site.
Horizontal: thrust vs drag
Vertical: lift vs weight (gravity)
If horizontal vectors are equalized at zero you got a hover (helicopter). If the vectors are equalized with some magnitude, you have steady state forward flight.
If vertical vectors are equalized you maintain altitude (don't climb or descend).
All four vectors are always present. Thus if you are the pilot of an aircraft that is losing altitude (vertical vectors imbalanced: weight is greater than lift) and enter a turn you worsen the situation because now you have caused an imbalance in your horizontal vectors. This is not always 100% true, depending on the wind direction, but ultimately if you are in a power limited situation (losing altitude) and you turn, you are going to lose altitude at a greater rate.
That being said, there are several reasons you might want to turn even in a power limited situation. Turning to avoid obstacles being the first, turning towards a more favorable wind direction being the second.
I'll be the last person to second guess pilot actions until a full report is done. But so far all indications point to a high, hot, heavy aircraft experiencing flight control issues. The captain did whatever he thought was going to fix the situation, but sometimes you have no action that will save the aircraft.
Ship captains like to pride themselves with always going with the ship. That is a choice and is not always true. Pilots always go down with their aircraft that is a rule of law (sure....minus the nerds with ejection seats and parachutes...)
edit - just for relevance, this is why the reported "pitch down" on takeoff problems causes problems. Takeoff is the most dangerous situation to be in. You are heavy (full load/full gas) with full power requirements needed to accelerate and gain altitude. If the aircraft pitches down, the vertical lift vector is immediately reduced causing increased power requirements.
A rule is thumb is you have three things working for you as a pilot: airspeed, altitude, or power. You need two of those to survive. When you get down to one, its all over. But at least you will beat the emergency services to the crash site.
Never cross streams.