Bombardier CRJ, Milwaukee, Wis., April 1, 2007–Climbing out from General Mitchell International Airport (MKE) Runway 19R at 6:45 a.m., the Air Wisconsin CRJ, Flight 3714, experienced uncommanded nose-down stabilizer trim. The captain was flying. At 1,000 feet, the pilots retracted the flaps and disengaged the autopilot. The captain trimmed the airplane before completing the after-takeoff checklist, but the stabilizer trim continued to run and the aural alert sounded. The immediate action checklist was completed, as was the appropriate quick-reference handbook procedure.
The crew asked ATC for delay vectors and advised they might have to return to MKE for a precautionary landing. Moderate control pull forces were required to fly the aircraft at 10,000 feet and 250 knots. The crew used the acars system to calculate a weight-and-balance and redistributed the cabin load to ease control forces. They encountered ice at 10,000 feet, necessitating a descent to 8,000 feet.
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