SmoothOnTop

NTSB Identification: (deleted)
Injuries: 6 Minor, 136 Uninjured.
This is preliminary information, subject to change, and may contain errors. Any errors in this report will be corrected when the final report has been completed.
On (deleted), about (deleted) standard time, a (deleted), encountered severe turbulence during descent for landing at (deleted). The airplane, which was being operated under 14 Code of Federal Regulations Part 121 by (deleted), was not damaged. Five passengers and one flight attendant sustained minor injuries.

According to preliminary information, two of the five injured passengers were occupying seats where the seatbelt fittings failed and separated.

The remaining 132 passengers and 4 crewmembers were not injured. Visual meteorological conditions prevailed, and an instrument flight rules flight plan was filed for the regularly scheduled domestic passenger flight. The flight departed from (deleted), at (deleted), with an intended destination of (deleted). Following the turbulence encounter, the airplane landed in (deleted) without further incident.

According to information provided by (deleted), the flight was descending into (deleted) at an altitude of 11,400 feet above mean sea level (msl) when it encountered severe turbulence. The captain communicated with (deleted) Operations to arrange for paramedics to meet the airplane at the gate in (deleted). The flight continued and landed without further incident. Medical personnel met the airplane as requested, and the treated the injured passengers and flight attendant, classifying their injuries as minor.

A preliminary review of the flight recorder data provided by (deleted) disclosed that the airplane experienced a vertical acceleration minimum of approximately -0.761 G, followed 2 seconds later by a positive peak of approximately +1.762 G.

sean00xj

negative 1G with an airliner seat belt, that would be interesting. At what g do passengers get uncomfortable. What are typical airliner g limits?

Senior Skipper

Typically -1>g>2.5, depending on the configuration.

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rickair7777

I would guess + 1.5 G would make most pax unhappy. Negative G's of any magnitude would produce mass vomiting for sure. The worst "negative" load factor we see is just slightly less than +1.0 probably + 0.7

We normally bank 15-30 degress, which barely gets you over one G, and try to never do significantly less than +1.0...really only happens on a late hand-flown level off.

msh168

This is from the Hawker that collided with the glider in 2006. Very similar.

From NTSB Accident Database

http://tinyurl.com/2oxy4o

SmoothOnTop

Good find.