B727 crew aborted takeoff when they had smoke in the cockpit.

Attributes
ACN	429985
Time
Date	199903
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : den
State Reference	CO
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B727-200
Flight Phase	other other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 240 flight time total : 12000 flight time type : 2700
ASRS Report	429985
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : rejected takeoff flight crew : declared emergency other
Consequence	Other

Narrative:

On takeoff roll, electrical smoke came from the pilot's overhead panel through the runway turnoff light switches. We aborted the takeoff (approximately 60 KTS), shut off the switches, and pulled the circuit breakers. The smoke stopped. We advised ATC and deplaned at the gate. Callback conversation with reporter revealed the following information: crew was flying a B727-200 aircraft. The pilot saw burned and charred wiring from the runway turnoff light switches when maintenance lowered the overhead panel. These lights, along with the landing lights were turned on just prior to beginning the takeoff roll. The circuit breakers for the runway turnoff lights did not pop. The reporter has never heard of a similar occurrence. He considered this a unique event.

Original NASA ASRS Text

Title: B727 CREW ABORTED TKOF WHEN THEY HAD SMOKE IN THE COCKPIT.

Narrative: ON TKOF ROLL, ELECTRICAL SMOKE CAME FROM THE PLT'S OVERHEAD PANEL THROUGH THE RWY TURNOFF LIGHT SWITCHES. WE ABORTED THE TKOF (APPROX 60 KTS), SHUT OFF THE SWITCHES, AND PULLED THE CIRCUIT BREAKERS. THE SMOKE STOPPED. WE ADVISED ATC AND DEPLANED AT THE GATE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: CREW WAS FLYING A B727-200 ACFT. THE PLT SAW BURNED AND CHARRED WIRING FROM THE RWY TURNOFF LIGHT SWITCHES WHEN MAINT LOWERED THE OVERHEAD PANEL. THESE LIGHTS, ALONG WITH THE LNDG LIGHTS WERE TURNED ON JUST PRIOR TO BEGINNING THE TKOF ROLL. THE CIRCUIT BREAKERS FOR THE RWY TURNOFF LIGHTS DID NOT POP. THE RPTR HAS NEVER HEARD OF A SIMILAR OCCURRENCE. HE CONSIDERED THIS A UNIQUE EVENT.

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.