NTSB Identification: FTW88NA106.
The docket is stored on NTSB microfiche number 36078.
Scheduled 14 CFR operation of AMERICAN AIRLINES
Accident occurred Saturday, May 21, 1988 in DFW AIRPORT, TX
Aircraft: MCDONNELL DOUGLAS DC-10-30, registration: N136AA
Injuries: 2 Serious,6 Minor,246 Uninjured.

A REJECTED TAKEOFF WAS ATTEMPTED WHEN THE SLAT DISAGREE LIGHT ILLUMINATED AND THE TAKEOFF WARNING HORN SOUNDED AT 166 KNOTS (V1). THE PILOT ABORTED THE TAKEOFF, BUT THE AIRCRAFT ACCELERATED TO 178 KNOTS GROUND SPEED BEFORE IT BEGAN TO DECELERATE. THE DECELERATION WAS NORMAL UNTIL 130 KNOTS WHERE AN UNEXPECTED RAPID DECAY IN THE DECELERATION OCCURRED. THE AIRCRAFT RAN OFF THE END OF THE RUNWAY AT 95 KNOTS, THE NOSE GEAR COLLAPSED, AND THE AIRCRAFT CAME TO A STOP 1,100 FEET BEYOND THE END OF THE RUNWAY. EIGHT OF THE TEN BRAKE SETS FAILED. POST-ACCIDENT EXAM OF THE BRAKES REVEALED THAT EXCESSIVE BRAKE WEAR OCCURRED DURING THE REJECTED TAKEOFF. TESTING SHOWED THAT DC-10 WORN BRAKES HAVE A MUCH GREATER WEAR RATE DURING AN RTO. THE FAA DOES NOT REQUIRE WORN BRAKE TESTING. DOUGLAS DID NOT USE BRAKE WEAR DATA FROM RTO CERTIFICATION TESTS TO SET MORE CONSERVATIVE BRAKE WEAR REPLACEMENT LIMITS. NEW BRAKES WERE USED FOR THOSE TESTS.

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

LANDING GEAR,NORMAL BRAKE SYSTEM..INADEQUATE

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

ACFT/EQUIP,INADEQUATE AIRCRAFT COMPONENT..MANUFACTURER

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

INADEQUATE SUBSTANTIATION PROCESS..MANUFACTURER

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

INADEQUATE CERTIFICATION/APPROVAL,AIRCRAFT..FAA(ORGANIZATION)

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

LANDING GEAR,NORMAL BRAKE SYSTEM..FAILURE,TOTAL



Contributing Factors

FLT CONTROL SYST,WING SLAT SYSTEM..FALSE INDICATION




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