Passenger observed clear ice on 1 portion of the wing on his side of a B757 shortly after takeoff.

Attributes
ACN	294262
Time
Date	199501
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ord
State Reference	IL
Altitude	agl bound lower : 0 agl bound upper : 1000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ord
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : takeoff climbout : initial climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	294262
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : commercial pilot : instrument
Events
Anomaly	inflight encounter : weather other anomaly other
Independent Detector	other other : unspecified
Resolutory Action	none taken : anomaly accepted none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Above referenced flight originated in WX condition of light rain 36 degrees. Flight source was sju to ord on the gate for 1 hour or more. No icing or accumulations noticed during preflight or while taxi out for takeoff. Deicing crew inquired as to desire for deicing. Queried crew chief if he observed ice. Negative reply. 2 hours into flight, flight attendant called to say that non revenue pointed out ice on right wing. First officer went back to find 4 ft by 15 ft patch, extending from walk area outboard. Queried the non revenue as to what he had seen. After takeoff, clear ice covering from walk area to beyond filler cap from trailing line of slats to flap hinge line. Became apparent after takeoff with flexing of wing in chop. Thickness estimated to be 1/8 inch. Observer was not able to see left wing and it was clean at time of observation by first officer. Note that this would have been the sunny side wing on the wbound flight. 1 additional note: thin frost was observed on underside of wing. Wonder if this could be the same cold soak problem as encountered on the S80 fleet.

Original NASA ASRS Text

Title: PAX OBSERVED CLR ICE ON 1 PORTION OF THE WING ON HIS SIDE OF A B757 SHORTLY AFTER TKOF.

Narrative: ABOVE REFED FLT ORIGINATED IN WX CONDITION OF LIGHT RAIN 36 DEGS. FLT SOURCE WAS SJU TO ORD ON THE GATE FOR 1 HR OR MORE. NO ICING OR ACCUMULATIONS NOTICED DURING PREFLT OR WHILE TAXI OUT FOR TKOF. DEICING CREW INQUIRED AS TO DESIRE FOR DEICING. QUERIED CREW CHIEF IF HE OBSERVED ICE. NEGATIVE REPLY. 2 HRS INTO FLT, FLT ATTENDANT CALLED TO SAY THAT NON REVENUE POINTED OUT ICE ON R WING. FO WENT BACK TO FIND 4 FT BY 15 FT PATCH, EXTENDING FROM WALK AREA OUTBOARD. QUERIED THE NON REVENUE AS TO WHAT HE HAD SEEN. AFTER TKOF, CLR ICE COVERING FROM WALK AREA TO BEYOND FILLER CAP FROM TRAILING LINE OF SLATS TO FLAP HINGE LINE. BECAME APPARENT AFTER TKOF WITH FLEXING OF WING IN CHOP. THICKNESS ESTIMATED TO BE 1/8 INCH. OBSERVER WAS NOT ABLE TO SEE L WING AND IT WAS CLEAN AT TIME OF OBSERVATION BY FO. NOTE THAT THIS WOULD HAVE BEEN THE SUNNY SIDE WING ON THE WBOUND FLT. 1 ADDITIONAL NOTE: THIN FROST WAS OBSERVED ON UNDERSIDE OF WING. WONDER IF THIS COULD BE THE SAME COLD SOAK PROB AS ENCOUNTERED ON THE S80 FLEET.

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.