All general aviation accidents fall into two categories: controls still working at impact (C-FIT), or controls not working at impact (U-FIT).
*Thanks to Dan Gryder for identifying and compiling this list.
Controls Still Working At Impact (C-FIT)
1) SD-D: SPATIAL DISORIENTATION - DAY
2) SD-N: SPATIAL DISORIENTATION - NIGHT
3) I- IMC ATO: INTENTIONAL IMC AFTER TAKE OFF
4) U- IMC ATO: Unintentional IMC After Take Off
5) BUZZING / ACRO: Buzzing Or Low-Level Acrobatics
6) MISHANDLED ABN.: Mis-Handled Abnormal / Emergency
7) TERRAIN COLLISION: Terrain Collision
8) LOSS OF AHRS IN FLT: Loss Of Attitude Heading Reference
9) NON-STABILIZED APPCH.: Unstabilized Approach
10a) MEDICAL INCAPACITATION
10b) SUICIDE
Controls Not Working At Impact (U-FIT)
11) LOTOT: Loss of Thrust on Takeoff
12) LOSS OF SPEED AWARENESS: Loss of Speed Awareness
13) VMC ROLL OVER: Velocity Minimum Controllable Rollover
14) MID-AIR COLLISION: Mid-Air Collision
15) IN FLIGHT ICING: In-Flight Icing
16) MESSED UP GO-AROUND: Messed-Up Go-Around
17) FAILED FLT CONTROL SYSTEM: Failed Flight Control System
18) REJECTED TAKEOFF (RTO): Rejected Takeoff
19) SEAT SLIDES BACK: Seat Slides Back
20) ROTOT: Reduction of Thrust on Takeoff
21) THE IMPOSSIBLE TURN
22) AIRSHOW
23) OUT OF GAS
24) IN FLIGHT BREAKUP