Torsion door derailment
That matters for cost because newer doors around here mostly run on torsion spring systems with steel tracks, not the older extension-spring setups still common on 1980s and 90s stock elsewhere. A torsion door that's jumped track usually means a bent track section, a snapped cable, or a roller that's worked loose from its bracket - and pricing depends on which one it is, not a flat number we can quote before we see the door.
