Lockheed L-1011-385 TriStar 1 – JA8513

Incident Overview

Date: Monday 15 January 1979

Aircraft Type: Lockheed L-1011-385 TriStar 1

Owner/operator: All Nippon Airways – ANA

Registration Number: JA8513

Location: near Onjuku, Chiba Prefecture – ÿ Japan

Phase of Flight: En route

Status: Minor

Casualties: Fatalities: 0 / Occupants: 353

Component Affected: Aircraft’s descent approach system, specifically the turbulence mitigation system and seatbelt activation.Aircraft’s descent approach system, specifically the turbulence mitigation system and seatbelt activation.

Investigating Agency: JTSBJTSB

Category: Accident

Description

All Nippon Airways flight 32, a Lockheed TriStar, took off from Osaka International Airport and was approaching Tokyo International Airport when it crashed at around 16:49. One passenger and two flight attendants were injured and part of the aircraft was damaged. DFDR data revealed that the aircraft encountered turbulence with “g’s” varying from plus 1.081 to minus 0.638, of about 0.5 seconds. Cause: It is recognized that this accident was caused by the aircraft encountering severe turbulence during its descent approach to the airport. while en route at an altitude of 11000 ft between xa and 0jc, turbulence was encountered. the “fasten seat belt” sign had been turned on. a pax was seriously injured, and 2 cabin crew were slightly injured. the investigation of