Accident description
Last updated: 19 September 2014
Status:Final
Date:Saturday 21 May 1988
Time:16:12
Type:McDonnell Douglas DC-10-30
Operator:American Airlines
Registration: N136AA
C/n / msn: 47846/69
First flight: 1973
Total airframe hrs:61322
Cycles:12864
Engines: 3 General Electric CF6-50C2
Crew:Fatalities: 0 / Occupants: 14
Passengers:Fatalities: 0 / Occupants: 240
Total:Fatalities: 0 / Occupants: 254
Airplane damage: Substantial
Airplane fate: Written off (damaged beyond repair)
Location:Dallas/Fort Worth International Airport, TX (DFW) (   United States of America) show on map
Phase: Takeoff (TOF)
Nature:International Scheduled Passenger
Departure airport:Dallas/Fort Worth International Airport, TX (DFW/KDFW), United States of America
Destination airport:Frankfurt International Airport (FRA/EDDF), Germany
Flightnumber: 70
Narrative:
The crew of American Flight 70 rejected the takeoff when the slat disagree light illuminated and the takeoff warning horn sounded at 166 knots (V1), 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 examination 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 a rejected takeoff. The FAA did 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.

PROBABLE CAUSE:
landing gear, normal brake system .. inadequate
acft/equip,inadequate aircraft component .. manufacturer
inadequate substantiation process .. manufacturer
inadequate certification/approval, aircraft .. FAA (organization)
landing gear, normal brake system .. failure, total
CONTRIBUTING FACTORS
flt control syst,wing slat system .. false indication

Sources:
» Aviation Week & Space Technology 5.3.90 (78)
» ICAO Adrep Summary 4/90 (#26)
» NTSB/SIR-90/02 (5)


Follow-up / safety actions

NTSB issued 21 Safety Recommendations

Show all AD's and Safety Recommendations

Photos

photo of McDonnell Douglas DC-10-30 N136AA
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Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Dallas/Fort Worth International Airport, TX to Frankfurt International Airport as the crow flies is 8203 km (5127 miles).

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