21 March 1968 - United 9963 The takeoff warning horn sounded shortly after commencing takeoff from runway 09R. The takeoff was continued as the crew tried to figure out what caused the warning. The horn ceased prior to reaching rotate speed. The stickshaker came on and thrust was added, but the aircraft failed to climb and the captain elected to discontinue the takeoff. The 727 settled back to the macadam shoulder off the right side of the runway and struck a ditch, coming to rest 1100ft beyond the runway end and 300ft right of the extended centreline. The flaps had been set at 2deg instead of takeoff range of 5-25deg.
CAM - Cockpit area microphone
RDO - Radio transmission from accident aircraft
-1 - Voice identified as Captain
-2 - Voice identified as First Officer
-3 - Voice identified as Flight Engineer
-? - Unidentifiable voice
TWR - Chicago-O'Hare Tower controller
Time Source Content 0.00 TWR Seventy nine sixty three, turn left heading two seven zero, cleared for takeoff nine right. 0.05 RDO-2 Left two seven zero the heading, cleared for takeoff nine right, United seventy nine sixty three good night. 0.15 CAM-1 Final items. 0.16 CAM-3 Ignition 0.18 CAM-2 Flight CAM-3 Anti-skid 0.20 CAM-2 Armed -- nose release 0.22 CAM-3 Oil cooler -- ground off, takeoff checklist complete CAM-? * 0.46 CAM-? Okay its *** 0.49 CAM [Sound of pulsating warning horn begins] 0.51 CAM-2 Flaps, APU, flaps, speed brake, forward in the detent, flaps five to fifteen degrees, trim up, it's in the green band CAM-? Oh, *** it 1.07 CAM-1 I have it CAM-? (You going to get it?) 1.16 CAM-1 It must be the trim CAM-2 No it's in the green band now CAM-2 It can't be the trim 1.20 CAM [Sound of pulsating warning horn ceases] 1.22 CAM-2 Rotate CAM-3 APU's (okay) CAM-2 It's in the green band 1.26 CAM [Sound of stick shaker begins] 1.34 CAM [Sound of breakup begins] 1.45 End of recording ----------------------------------------------------------------------------------------
Cockpit Voice Recorder Database, visit us at www.tailstrike.com