Incident Overview

Date: Thursday 26 August 1982
Aircraft Type: Boeing 737-2Q3
Owner/operator: Southwest Air Lines
Registration Number: JA8444
Location: Ishigaki Airport (ISG) – ÿ Japan
Phase of Flight: Landing
Status: Destroyed, written off
Casualties: Fatalities: 0 / Occupants: 138
Component Affected: Main Gear LegsMain Gear Legs
Investigating Agency: AAICAAIC
Category: Accident
A Southwest Airlines 737 experienced a significant landing failure due to a sudden and unexpected tire failure during a crosswind landing at Naha Airport. The aircraft’s descent and approach procedures were disrupted by unfavorable weather conditions, leading to a series of events culminating in a runway excursion and subsequent fire.A Southwest Airlines 737 experienced a significant landing failure due to a sudden and unexpected tire failure during a crosswind landing at Naha Airport. The aircraft’s descent and approach procedures were disrupted by unfavorable weather conditions, leading to a series of events culminating in a runway excursion and subsequent fire.

Description

Southwest Airlines Flight 611 departed Naha runway 36 at 13:09 for a regular flight to Ishigaki-Shima. The aircraft climbed to the cruising altitude of FL240. At 13:33 the crew were cleared to descend to 8000 feet and after that to 3000 feet. Approaching 3000 feet, the crew were given weather information for Ishigaki: wind 300deg/12 kts; temperature 32deg C; active runway: RWY22. The 737 made a crosswind landing, with the speed at touchdown 6 knots above Vref. The aircraft bounced and landed back. When the spoilers and reversers didn’t seem to operate, the crew shut down both engines, thus making it impossible to use the anti-skid system. The inner tyres on both main gear legs burst almost simultaneously at 125 m short of the runway end. The aircraft skidded to the left, overran the runway and came to rest 145 m further on. At 14:01, after everyone on board had been evacuated, the aircraft caught fire.

Primary Cause

Unexpected tire failure during a crosswind landing.Unexpected tire failure during a crosswind landing.

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