Narrative:

This was to have been a charter flight from cid to cmh, on 2/tue/89. The crew arrived at the airport around xa. We arrived early to ensure the aircraft was prepared for flight. The day prior, 2/mon/89, there had been approximately 6' of snowfall. Upon our arrival the ramp personnel explained their snow removal procedures. All snow had been removed from the wings, tail and fuselage earlier that day. I did a preflight and checked all surfaces. There was no snow, ice or frost. After the passenger arrived the captain and I both made one last walk around. The sky conditions had gone from high overcast to clear. We both agreed there was no frost. The takeoff was normal. However, as the flaps retracted the control wheel began to shake. It was agreed we should return. On the downwind, in level flight, there was less shake. On the base turn the flaps were lowered to 20%. All vibration and control wheel shake went away. The landing was normal. The passenger were briefed on the situation and off loaded. A mechanic was called in to inspect the aircraft. Inspection of the horizontal stabilator found frozen snow/ice on both sides near the fuselage, approximately 1' thick and about 12' from the fuselage outboard. This are cannot be seen from the ground, nor from the passenger entrance door. After the aircraft was deiced the mechanic reinspected the tail section and signed it off for a test flight. The test flight was normal. The aircraft was then returned to home station.

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Original NASA ASRS Text

Title: IMMEDIATELY AFTER TKOF ACFT EXPERIENCED AIRFRAME VIBRATION APPARENTLY CAUSED BY ICE LOCATED ON FUSELAGE NEAR TAIL.

Narrative: THIS WAS TO HAVE BEEN A CHARTER FLT FROM CID TO CMH, ON 2/TUE/89. THE CREW ARRIVED AT THE ARPT AROUND XA. WE ARRIVED EARLY TO ENSURE THE ACFT WAS PREPARED FOR FLT. THE DAY PRIOR, 2/MON/89, THERE HAD BEEN APPROX 6' OF SNOWFALL. UPON OUR ARR THE RAMP PERSONNEL EXPLAINED THEIR SNOW REMOVAL PROCS. ALL SNOW HAD BEEN REMOVED FROM THE WINGS, TAIL AND FUSELAGE EARLIER THAT DAY. I DID A PREFLT AND CHKED ALL SURFACES. THERE WAS NO SNOW, ICE OR FROST. AFTER THE PAX ARRIVED THE CAPT AND I BOTH MADE ONE LAST WALK AROUND. THE SKY CONDITIONS HAD GONE FROM HIGH OVCST TO CLR. WE BOTH AGREED THERE WAS NO FROST. THE TKOF WAS NORMAL. HOWEVER, AS THE FLAPS RETRACTED THE CTL WHEEL BEGAN TO SHAKE. IT WAS AGREED WE SHOULD RETURN. ON THE DOWNWIND, IN LEVEL FLT, THERE WAS LESS SHAKE. ON THE BASE TURN THE FLAPS WERE LOWERED TO 20%. ALL VIBRATION AND CONTROL WHEEL SHAKE WENT AWAY. THE LNDG WAS NORMAL. THE PAX WERE BRIEFED ON THE SITUATION AND OFF LOADED. A MECH WAS CALLED IN TO INSPECT THE ACFT. INSPECTION OF THE HORIZ STABILATOR FOUND FROZEN SNOW/ICE ON BOTH SIDES NEAR THE FUSELAGE, APPROX 1' THICK AND ABOUT 12' FROM THE FUSELAGE OUTBOARD. THIS ARE CANNOT BE SEEN FROM THE GND, NOR FROM THE PAX ENTRANCE DOOR. AFTER THE ACFT WAS DEICED THE MECH REINSPECTED THE TAIL SECTION AND SIGNED IT OFF FOR A TEST FLT. THE TEST FLT WAS NORMAL. THE ACFT WAS THEN RETURNED TO HOME STATION.

Data retrieved from NASA's ASRS site as of August 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.