What was found
AIRCRAFT WAS NOT GROUNDED AND IS IN CHECK FOR SCHEDULED MX. AFT L/H UNDERNEATH FLOOR BOARDS AT FR. 69 CORNER SILL PLATE CRACKED AT FWD I/B AREA. REMOVED AND REPLACED SHEAR PLATE FROM FRAME 69 L/H IAW A321 SRM 51-72-11, SRM 51-44-11, SRM 51-75-12, ESPM 20-33-21-08, ASM 35-55-01, SRM 51-23-12, AMM 25-41-41-710-050-A, SRM 51-23-12 MX ACTION IS ACCEPTABLE.