Incident Overview
Date: Monday 11 May 1987
Aircraft Type: McDonnell Douglas DC-9-41
Owner/operator: TOA Domestic
Registration Number: JA8436
Location: 55 km SSW of Sendai City –
ÿ Japan
Phase of Flight: En route
Casualties: Fatalities: 0 / Occupants: 59
Component Affected: AircraftAircraft
Investigating Agency: JTSBJTSB
Category: Accident

A TOA Domestic flight 154 experienced turbulence approximately 55 kilometers south-southwest at an altitude of 25,700 feet. A total of 59 people were on board, including the captain, four crew members, and 54 passengers, with one infant. One flight attendant was injured. The FDR showed g values ranging from -0.20 to +2.30 seconds duration.A TOA Domestic flight 154 experienced turbulence approximately 55 kilometers south-southwest at an altitude of 25,700 feet. A total of 59 people were on board, including the captain, four crew members, and 54 passengers, with one infant. One flight attendant was injured. The FDR showed g values ranging from -0.20 to +2.30 seconds duration.
Description
TOA Domestic flight 154 encountered turbulence approximately 55 kilometers south-southwest at an altitude of approximately 25,700 feet. There were a total of 59 people on board the aircraft, including the captain, four crew members, and 54 passengers (including one infant), but one flight attendant was injured. The FDR showed g values from minus 0.20 to plus 2.30 of 2-3 seconds duration. Cause: It is estimated that this accident was caused by the aircraft encountering strong and unpredictable turbulence while descending from an altitude of 28,000 feet to an altitude of 24,000 feet.
Primary Cause
Strong and unpredictable turbulence descending from an altitude of 28,000 feet to an altitude of 24,000 feet.Strong and unpredictable turbulence descending from an altitude of 28,000 feet to an altitude of 24,000 feet.Share on: