Confiture
According to the BEA, the electric stop was at 11 degrees up.
But DozyWannabe, who sat once in a A320 simulator, pretends the A320 airplane has a limitation for the autotrim at 3 degrees. Maybe he knows after all ... but better if he produces the Reference.
True that not everything is black on white in the Airbus documentation dedicated to the pilot ...
From the Perpignan Final report:
At 15 h 45 min 15, the flight control laws, which were in normal law, passed to direct law. Bank angle reached 50° to the right. The Captain’s lateral input was still at the left stop. The rudder pedal reached a 22 degrees left position. At the same moment, the Captain’s longitudinal input changed to the forward pitch down stop position. Pitch was 11 degrees, the speed 100 kt and the altitude about 2,580 ft.
Auto-trim
From 15 h 44 min 30 the automatic trim function displaced the stabiliser as far
as the electric nose-up thrust stop (- 11 degrees). The stall warning sounded at 15 h 45 min 05. The nose down commands applied by the Captain on the sidestick brought the elevators, due to the load factor, to the neutral position, without however pushing them to the stops(25). Consequently, the trimmable stabilizer did not move even though the flight control law was normal. From 15 h 45 min 15 until the end of the flight, the automatic trim function remained unavailable. In fact, the direct law was active from 15 h 45 min 15 to 15 h 45 min 40 and the Abnormal attitude law phase 1 (without auto-trim) remained active till the end of the flight.
Maybe DozyWannabe did some mixup with the laws (normal, alternate, abnormal, direct...)?
The trim went to 11° NU in normal law, stopped operating at 15h 45m 15 s when direct law started and remained inop when at 15h 45m 40s abnormal law was latched until the end of the flight (as designed).