Aviation Accident Summaries

Aviation Accident Summary CHI83IA418

CHICAGO, IL, USA

Aircraft #1

N1984

BOEING 727-200

Analysis

THE ACFT EXPERIENCED A LEFT WALKING BEAM FAILURE WHEN THE LANDING GEAR WAS EXTENDED DURING APPROACH, THE ACFT LOG WAS NOTED 'DURING GEAR EXTENSION AT 230 KTS TREMENDOUS BANG OCCURRED WHICH DROPPED PANELS AT ROWS 15-7 02 MASKS AT ROW 18. THREE GREEN NORMAL GEAR INDICATION. ON TAXI IN---NO ABNORMALITIES NOTED.' THE FAILED WALKING BEAM WAS MADE OF ALUMINUM. THREE IS AN AD FOR THIS PART CALLING FOR ULTRASONIC INSPECTION EVERY 1500 HOURS. DURING AN INSPECTION A MECHANIC MISTOOKTHE BEAM FOR A STEEL ONE AND THE INSPECTION WAS NOT COMPLIED WITH AT THE PROPER TIME. AAL HAS TAKEN CORRECTIVE ACTION AND AT LAST COUNT ALL ALUMINUM BEAMS HAD BEEN REPLACED.

 

Source: NTSB Aviation Accident Database

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