<< >> NASA ASRS Report 228204, December 1992

Inadequate preflight procedure deicing and subsequent loss of aircraft performance in rate of climb mandates return land at departure airport.

Attributes
ACN	228204
Time
Date	199212
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sea
State Reference	WA
Altitude	msl bound lower : 5000 msl bound upper : 9500
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sea tracon : dfw
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	climbout : intermediate altitude ground : preflight other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : cfi pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 300 flight time total : 7800
ASRS Report	228204
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical inflight encounter other non adherence : published procedure other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : exited adverse environment other
Consequence	Other
Supplementary
Primary Problem	Weather
Air Traffic Incident	Pilot Deviation other

Narrative:

WX conditions dictated a thorough deice procedure prior to our departure. Upon completion we taxied for takeoff on runway 34L at seatac. We were held at B11 intersection. We checked our wings for takeoff and they were clear except for moisture from the melting snow. Our takeoff took a bit longer due to slush on the runway but nevertheless uneventful. Climb out was done at our recommended 170-180 KIAS. Icing was encountered at 5000 MSL and continued to accumulate at a rate of moderate. Upon reaching 9500 MSL further climb was at 0-500 FPM at our min climb of 160 KIAS. We requested a return to seatac and landed uneventfully. Upon landing we realized some of the fuselage was not deiced properly in areas not visible from the cockpit. We would recommend requirements in training for commuter aircraft for deicing and proper training for flight crew assessment of airframe ice accumulation.

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Original NASA ASRS Text

Title: INADEQUATE PREFLT PROC DEICING AND SUBSEQUENT LOSS OF ACFT PERFORMANCE IN RATE OF CLB MANDATES RETURN LAND AT DEP ARPT.

Narrative: WX CONDITIONS DICTATED A THOROUGH DEICE PROC PRIOR TO OUR DEP. UPON COMPLETION WE TAXIED FOR TKOF ON RWY 34L AT SEATAC. WE WERE HELD AT B11 INTXN. WE CHKED OUR WINGS FOR TKOF AND THEY WERE CLR EXCEPT FOR MOISTURE FROM THE MELTING SNOW. OUR TKOF TOOK A BIT LONGER DUE TO SLUSH ON THE RWY BUT NEVERTHELESS UNEVENTFUL. CLBOUT WAS DONE AT OUR RECOMMENDED 170-180 KIAS. ICING WAS ENCOUNTERED AT 5000 MSL AND CONTINUED TO ACCUMULATE AT A RATE OF MODERATE. UPON REACHING 9500 MSL FURTHER CLB WAS AT 0-500 FPM AT OUR MIN CLB OF 160 KIAS. WE REQUESTED A RETURN TO SEATAC AND LANDED UNEVENTFULLY. UPON LNDG WE REALIZED SOME OF THE FUSELAGE WAS NOT DEICED PROPERLY IN AREAS NOT VISIBLE FROM THE COCKPIT. WE WOULD RECOMMEND REQUIREMENTS IN TRAINING FOR COMMUTER ACFT FOR DEICING AND PROPER TRAINING FOR FLC ASSESSMENT OF AIRFRAME ICE ACCUMULATION.

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.