This is an excerpt from a report made to the Aviation Safety Reporting System. The narrative is written by the pilot, rather than FAA or NTSB officials. To maintain anonymity, many details, such as aircraft model or airport, are often scrubbed from the reports.
On a training/currency flight with a private pilot/student, the Cessna 172 started pitching up slightly nose high. Pilot was adjusting trim, and at some point I told pilot that “you are adjusting trim wrong direction.”
Couple seconds later I noticed that pilot had trouble controlling airplane and I took over. Pilot confirmed that “trim is all the way nose down,” and I confirmed same after leveling airplane off, as well as status of autopilot and electric trim.
I asked tower to return to the field and landed on the active runway forcing controls down.
After landing, we found out that trim was actually moving wrong direction (and in fact was all the way “nose up”), due to mechanical issue/error.
Neither of us were aware of recent repairs being performed on the plane, nor need for a test flight.
I’m not sure about a chain of events leading to dispatching airplane as airworthy which must be grounded due to ongoing repairs.
Primary Problem: Procedure