NTSB Identification: FTW85IA221.
The docket is stored on NTSB microfiche number 30396.
Scheduled 14 CFR DELTA AIRLINES INC.
Incident occurred Saturday, May 11, 1985 in D/FW AIRPORT, TX
Aircraft: BOEING B767-232, registration: N108DL
Injuries: 53 Uninjured.

NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.

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

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

AIR COND/HEATING/PRESSURIZATION..FAILURE,TOTAL

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

PNEUMATIC SYSTEM..FAILURE,TOTAL

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

AIR COND/HEATING/PRESSURIZATION,PRESSURE REGULATOR..FAILURE,TOTAL

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

PNEUMATIC SYSTEM..PRESSURE EXCESSIVE

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

THROTTLE/POWER LEVER,CABLE..INOPERATIVE

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

THROTTLE/POWER LEVER,CABLE..SEPARATION

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