NTSB Identification: MIA90LA155.
The docket is stored on NTSB microfiche number 41918.
Scheduled 14 CFR operation of AMERICAN AIRLINES, INC.
Accident occurred Wednesday, July 18, 1990 in FORT MYERS, FL
Probable Cause Approval Date: 09/28/1992
Aircraft: BOEING 727-223, registration: N6834
Injuries: 1 Serious,1 Minor,150 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

AN AMERICAN AIRLINES, BOEING 727-223, WAS IFR AT FLIGHT LEVEL 30,200. THE AIRPLANE WAS 15 NAUTICAL MILES, NORTHWEST OF FORT MYERS, FLORIDA, IN A DESCENT TO MIAMI INTERNATIONAL AIRPORT, MIAMI, FLORIDA, WHEN IT EXPERIENCED AN UNFORECASTED ENCOUNTER WITH WEATHER (SEVER TURBLENCE). THE AIRPLANE WAS NOT DAMAGED. ONE FLIGHT ATTENDANT SUSTAINED SERIOUS INJURY, AND ONE PASSENGER SUSTAINED MINOR INJURIES. THE AIRPLANE ARRIVED AT DESTINATION AIRPORT WITHOUT FIRTHER INCIDENT. ANALYSIS OF THE FLIGHT DATA RECORDER REVEALED THE AIRPLANE WAS SUBJECTED TO A SERIES OF OSCILLATING VERTICAL ('G') LOADS FOR A PERIOD OF 50 SECONDS. THE MAXIMUM G LOAD WAS 1.94, AND THE MINIMUM WAS -0.55.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

UNFORECASTED ENCOUNTER WITH WEATHER. THE AIRPLANE ENCOUNTERED SEVERE TURBLENCE DURING ENROUTE DESCENT, RESULTING IN ONE FLIGHT ATTENDANT SUSTAINING SERIOUS INJURY, AND ONE PASSENGER SUSTAINING MINOR INJURY.

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