Aviation Accident Summaries

Aviation Accident Summary FTW85IA221

D/FW AIRPORT, TX, USA

Aircraft #1

N108DL

BOEING B767-232

Analysis

THE B767 WAS ON THE TAKEOFF ROLL. THE PRESSURE REGULATOR AND SHUTOFF VALVE COUPLED WITH THE HIGH PRESURE SHUTOFF VALVE MALFUNCTIONED RESULTING IN PRESSURES BEING DEVELOPED IN THE DOWNSTREAM AIRCRAFT DUCTING IN EXCESS OF 300 PSIG. A COUPLING IN THE AIR CONDITIONING PACK BAY SEPARATED ALLOWING THE DUCTING TO COME APART DUE TO THE EXCESS PRESSURE WITH SUFFICIENT FORCE TO TEAR LOOSE DUCT SUPPORTS, CRACK FAIRING PANELS, SEVER BOTH RH ENGINE THROTTLE CABLES, BREAK ACTUATING LINKAGE FOR THE LEADING EDGE SLAT DRIVE, BLOW OPEN RH PACK BAY DOOR AND CAUSE A SECTION OF DUCTING CONTAINING THE CENTER ISOLATION VALVE TO DEPART FROM THE AIRCRAFT. MINOR DAMAGE OCCURRIED TO THE AIR CRAFT STRUCTURE

 

Source: NTSB Aviation Accident Database

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