21 hours ago, dmwalker said:

https://www.cnn.com/travel/united-flight-plunge-ntsb-report/index.htm

I fixed the link for then article.

Edited August 11, 20232 yr by n4gix

3 hours ago, n4gix said:

I fixed the link for then article.

For some reason, that takes me to "Uh-oh".

I am puzzled over the conclusion that:

When the airplane reached the acceleration altitude, the captain reduced the pitch attitude slightly and called for the flap setting to be reduced to flaps 5,” the NTSB said in its report. “According to the first officer, he thought that he heard the captain announce flaps 15.”

I can't imagine the number 5 being mistaken for 15 and I can't understand why the first officer would even think that the captain would want to go to flaps 15 at the acceleration altitude.

Edited August 12, 20232 yr by dmwalker

I noticed the same and wondered about the co-pilot's confusion regarding the flap setting. . .

"Flaps on five".

Hook

"According to the NTSB, the captain and first officer agreed on takeoff procedures with flaps set to 20 degrees and reduced thrust, per performance calculations."

"Once reaching acceleration altitude, the captain slightly reduced the plane's pitch and called for the flap setting to be decreased to five degrees, the NTSB reported. However, the first officer reportedly thought the captain announced the flaps to be set at 15 degrees and did so without contacting the departure ATC to discuss the weather conditions."

"Once this happened, the captain noticed that the aircraft's maximum operating speed indicator shifted to a lower value than expected, and the airspeed started to accelerate rapidly, according to the NTSB. To avoid going overspeed, the captain manually reduced the engine thrust, which overrode the auto throttle engagement. The captain also noticed the flaps indicator showed 15 degrees and called again for the flaps to be set at five degrees – which the first officer then adjusted."

"The first officer recalled that the captain asked for flaps 1 soon after he had called for flaps 5, and when the first officer set the flaps to 1°, he then noticed the airspeed had increased further, and the control column moved forward," the NTSB said.