Unauthorized taxi takeoff.

Attributes
ACN	299752
Time
Date	199503
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : tvl
State Reference	CA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : corporate
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	climbout : takeoff ground : preflight ground other : taxi
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : cfi pilot : commercial
Experience	flight time total : 12800
ASRS Report	299752
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	incursion : runway non adherence : far other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

Engines running before contact with tower. Radios would not work properly, I tried contacting tower with no luck. Cause may have occurred from moisture and cold mixed from descent or wires on microphone loose on jacks as looked at in sacramento. Jet engine running with cost of 250 dollars to shutdown and restart. I tried contacting by light codes, etc. Not good. Remedy: pilot could have checked radios before starting engines. Pilot did check for traffic and wind conditions and safety precautions while trying to contact tower. When totally unsuccessful, pilot could have returned to ramp and called on phone. Factor affecting those decisions were pilot did not want to spend 250 dollars to shutdown engines and restart so tried to get tower by light signals. Also waited for signals when no signal came, pilot made a safe takeoff with no conflicts.

Original NASA ASRS Text

Title: UNAUTH TAXI TKOF.

Narrative: ENGS RUNNING BEFORE CONTACT WITH TWR. RADIOS WOULD NOT WORK PROPERLY, I TRIED CONTACTING TWR WITH NO LUCK. CAUSE MAY HAVE OCCURRED FROM MOISTURE AND COLD MIXED FROM DSCNT OR WIRES ON MIKE LOOSE ON JACKS AS LOOKED AT IN SACRAMENTO. JET ENG RUNNING WITH COST OF 250 DOLLARS TO SHUTDOWN AND RESTART. I TRIED CONTACTING BY LIGHT CODES, ETC. NOT GOOD. REMEDY: PLT COULD HAVE CHKED RADIOS BEFORE STARTING ENGS. PLT DID CHK FOR TFC AND WIND CONDITIONS AND SAFETY PRECAUTIONS WHILE TRYING TO CONTACT TWR. WHEN TOTALLY UNSUCCESSFUL, PLT COULD HAVE RETURNED TO RAMP AND CALLED ON PHONE. FACTOR AFFECTING THOSE DECISIONS WERE PLT DID NOT WANT TO SPEND 250 DOLLARS TO SHUTDOWN ENGS AND RESTART SO TRIED TO GET TWR BY LIGHT SIGNALS. ALSO WAITED FOR SIGNALS WHEN NO SIGNAL CAME, PLT MADE A SAFE TKOF WITH NO CONFLICTS.

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.