Narrative:

In the beginning of the takeoff a pressure 'bump' (slight increase in pressure) was felt when throttles were advanced approximately 1/2 way to takeoff thrust. Shortly after the engineer set takeoff thrust, a light came on (on the caution and warning panel) at approximately 80-90 KTS -- takeoff was aborted and after turning off the runway, smoke was reported in the cabin so I ordered the aircraft evacuated. A ruptured (J area) duct was found. Aircraft was returned to service 48 hours later. Callback conversation with reporter revealed the following: reporter stated that the abort had been initiated due to the warning light on the warning panel and that, associated with the bump in pressure the flight crew had felt, was enough to start the abort. After the aircraft was on the taxiway and just as it was coming to a stop a passenger, a deadheading captain of the air carrier, advised the flight crew that there was heavy smoke in the cabin. For some unknown reason the cabin attendants did not advise the PIC of that situation. An evacuation was called for on seeing the density and dark brown color of the smoke. So far as the reporter knows, only one person slightly hurt their ankle on the evacuation. Due to the wind direction and velocity the left rear chute blew back over the wing. Maintenance determined that a coupling failed in the J section of the duct, under the passenger section and the high pressure bleed air bypassed the control valve and air conditioning packs, thus losing temperature and pressure control. The company gave the flight crew an 'ataboy' letter for their performance.

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Original NASA ASRS Text

Title: ACR WDB ABORTS TKOF AND EVACUATES PASSENGERS AFTER SMOKE IS REPORTED IN CABIN. ACFT CAUTION AND WARNING PANEL HAD A WARNING LIGHT ON PRIOR TO THE ABORT.

Narrative: IN THE BEGINNING OF THE TKOF A PRESSURE 'BUMP' (SLIGHT INCREASE IN PRESSURE) WAS FELT WHEN THROTTLES WERE ADVANCED APPROX 1/2 WAY TO TKOF THRUST. SHORTLY AFTER THE ENGINEER SET TKOF THRUST, A LIGHT CAME ON (ON THE CAUTION AND WARNING PANEL) AT APPROX 80-90 KTS -- TKOF WAS ABORTED AND AFTER TURNING OFF THE RWY, SMOKE WAS REPORTED IN THE CABIN SO I ORDERED THE ACFT EVACUATED. A RUPTURED (J AREA) DUCT WAS FOUND. ACFT WAS RETURNED TO SERVICE 48 HRS LATER. CALLBACK CONVERSATION WITH REPORTER REVEALED THE FOLLOWING: REPORTER STATED THAT THE ABORT HAD BEEN INITIATED DUE TO THE WARNING LIGHT ON THE WARNING PANEL AND THAT, ASSOCIATED WITH THE BUMP IN PRESSURE THE FLT CREW HAD FELT, WAS ENOUGH TO START THE ABORT. AFTER THE ACFT WAS ON THE TXWY AND JUST AS IT WAS COMING TO A STOP A PAX, A DEADHEADING CAPT OF THE ACR, ADVISED THE FLT CREW THAT THERE WAS HEAVY SMOKE IN THE CABIN. FOR SOME UNKNOWN REASON THE CABIN ATTENDANTS DID NOT ADVISE THE PIC OF THAT SITUATION. AN EVACUATION WAS CALLED FOR ON SEEING THE DENSITY AND DARK BROWN COLOR OF THE SMOKE. SO FAR AS THE REPORTER KNOWS, ONLY ONE PERSON SLIGHTLY HURT THEIR ANKLE ON THE EVACUATION. DUE TO THE WIND DIRECTION AND VELOCITY THE LEFT REAR CHUTE BLEW BACK OVER THE WING. MAINT DETERMINED THAT A COUPLING FAILED IN THE J SECTION OF THE DUCT, UNDER THE PAX SECTION AND THE HIGH PRESSURE BLEED AIR BYPASSED THE CONTROL VALVE AND AIR CONDITIONING PACKS, THUS LOSING TEMPERATURE AND PRESSURE CONTROL. THE COMPANY GAVE THE FLT CREW AN 'ATABOY' LETTER FOR THEIR PERFORMANCE.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.