Air carrier medium large transport performs takeoff after deicing 'holdover time' expires.

Attributes
ACN	297953
Time
Date	199502
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : lga
State Reference	NY
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : takeoff ground : holding ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 170 flight time total : 13500 flight time type : 3000
ASRS Report	297953
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	inflight encounter : weather non adherence : far non adherence : published procedure other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Weather
Air Traffic Incident	Pilot Deviation

Narrative:

As required, prior to pushback, I checked the aircraft surfaces for contamination. I determined that de-icing was required. Very light drizzle, or mist, was falling with a reported temperature of 31 degrees fahrenheit. The first officer and I agreed that both type I and type ii de-ice fluids would be used. The aircraft was de-iced using these fluids, with an application time of XA43. The first officer and I determined that due to the very light intensity, the 'holdover time' would be 20 min. Therefore, the 'holdover time' would expire at XB03. During taxi for takeoff, the precipitation stopped for a time, and began again. The length of this cessation was not measured by the flight crew and we did not change our 'holdover time.' some air traffic delays were incurred prior to takeoff. As required the first officer performed a 'pretkof check' within 5 min of our takeoff. At XB03, we received clearance for 'position and hold' on runway 13. (At takeoff, the aircraft was free of contamination.) our takeoff roll began after XB03, approximately XB04, and therefore our original 'holdover time' had expired. The flight to destination orf was routine.

Original NASA ASRS Text

Title: ACR MLG PERFORMS TKOF AFTER DEICING 'HOLDOVER TIME' EXPIRES.

Narrative: AS REQUIRED, PRIOR TO PUSHBACK, I CHKED THE ACFT SURFACES FOR CONTAMINATION. I DETERMINED THAT DE-ICING WAS REQUIRED. VERY LIGHT DRIZZLE, OR MIST, WAS FALLING WITH A RPTED TEMP OF 31 DEGS FAHRENHEIT. THE FO AND I AGREED THAT BOTH TYPE I AND TYPE II DE-ICE FLUIDS WOULD BE USED. THE ACFT WAS DE-ICED USING THESE FLUIDS, WITH AN APPLICATION TIME OF XA43. THE FO AND I DETERMINED THAT DUE TO THE VERY LIGHT INTENSITY, THE 'HOLDOVER TIME' WOULD BE 20 MIN. THEREFORE, THE 'HOLDOVER TIME' WOULD EXPIRE AT XB03. DURING TAXI FOR TKOF, THE PRECIPITATION STOPPED FOR A TIME, AND BEGAN AGAIN. THE LENGTH OF THIS CESSATION WAS NOT MEASURED BY THE FLC AND WE DID NOT CHANGE OUR 'HOLDOVER TIME.' SOME AIR TFC DELAYS WERE INCURRED PRIOR TO TKOF. AS REQUIRED THE FO PERFORMED A 'PRETKOF CHK' WITHIN 5 MIN OF OUR TKOF. AT XB03, WE RECEIVED CLRNC FOR 'POS AND HOLD' ON RWY 13. (AT TKOF, THE ACFT WAS FREE OF CONTAMINATION.) OUR TKOF ROLL BEGAN AFTER XB03, APPROX XB04, AND THEREFORE OUR ORIGINAL 'HOLDOVER TIME' HAD EXPIRED. THE FLT TO DEST ORF WAS ROUTINE.

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.