<< >> NASA ASRS Report 137571, February 1990

During taxi pilot of small transport noticed smoke coming from nose of aircraft. Stopped and disembarked from aircraft. Engines shut down.

Attributes
ACN	137571
Time
Date	199002
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : rfd
State Reference	IL
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : mkc
Operator	general aviation : corporate
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	ground other : taxi
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial pilot : atp
ASRS Report	137571
Person 2
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other other : unspecified cockpit
Resolutory Action	flight crew : rejected takeoff
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

While at rockford, il, preparing to takeoff for pontiac, mi, we noticed smoke coming from the right front nose just as we began taxiing onto the active for takeoff. We immediately shut down the engines, on the taxiway, and disembarked. Further inspection indicated that the heater had overheated due to the simultaneous failure of the combustion air pressure switch, the combustion air blower, and the ground fan to the heater. The combined failure caused the heater to continue heating to dangerous levels.

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Original NASA ASRS Text

Title: DURING TAXI PLT OF SMT NOTICED SMOKE COMING FROM NOSE OF ACFT. STOPPED AND DISEMBARKED FROM ACFT. ENGINES SHUT DOWN.

Narrative: WHILE AT ROCKFORD, IL, PREPARING TO TKOF FOR PONTIAC, MI, WE NOTICED SMOKE COMING FROM THE R FRONT NOSE JUST AS WE BEGAN TAXIING ONTO THE ACTIVE FOR TKOF. WE IMMEDIATELY SHUT DOWN THE ENGS, ON THE TXWY, AND DISEMBARKED. FURTHER INSPECTION INDICATED THAT THE HEATER HAD OVERHEATED DUE TO THE SIMULTANEOUS FAILURE OF THE COMBUSTION AIR PRESSURE SWITCH, THE COMBUSTION AIR BLOWER, AND THE GND FAN TO THE HEATER. THE COMBINED FAILURE CAUSED THE HEATER TO CONTINUE HEATING TO DANGEROUS LEVELS.

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.