What was found
AIRCRAFT WAS GROUNDED: L1 DOOR LIGHT CAME ON PASSING FLIGHT LEVEL 250. FLIGHT RETURNED TO STL LANDING SAFELY. **SUPPLEMENTAL REPORT FOR AALA202303036902: MAINTENANCE FOUND L1 DOOR INDICATION ISSUED TO BE CAUSED BY L1 DOOR SENSOR SW199 WIRING HAD AN INCORRECT PIN TERMINATED AT GROUND BLOCK GD11306. CORRECTED WIRING. ACCOMPLISHED SATISFACTORY L1 DOOR SOFT UNLATCHING CHECK PER AMM 52-11-00.** (CLOSED)