What was found
CORROSION ON PRESSURE FLOOR ANGLE FS 473.15 TO FS 473.15 +5 AND LBL 36 TO LBL 42. AIRCRAFT REMOVED FROM SERVICE. REMOVED CORROSION FROM PRESSURE FLOOR ANGLE FS 473.15 TO FS 473.15 + 5 AND LBL 36 TO LBL 42 BY BLENDING. BLENDED AREA MEASURED (P1) 1.070'' L X 0.530'' W (P2) 3.260'' L X 0.920'' W (P3) 0.870'' L X 0.660'' W (P4) 0.650'' L X 0.380'' W. TOOL USED DIGITAL CALIPER S/N 0036003 CAL DUE 04/03/2021, REF BOMBARDIER REO 601R-53-41-666 REV C DATED 2012-11-06. PERFORMED HFEC INSPECTION ON BLENDED AREA OF PRESSURE ANGLE FS 473.15 TO FS 473.15 + 5 AND LBL 36 TO LBL 42, REF BOMBARDIER REO 601R-53-41-666 REV C DATED 2012-11-06 AND CRJ-200 NDTM PART 1 51-20-06 REV 42, NO INDICATIONS NOTED. EDDY CURRENT TESTER S/N 60007150515 CAL DUE 10/09/21. PERFORMED UT THICKNESS MEASUREMENT ON BLENDED AREA OF PRESSURE FLOOR ANGLE FS 473.15 TO FS 473.15 +5 AND LBL 36 TO LBL 42. MINIMUM REMAINING THICKNESS MEASURES (P1) 0.0781'' (P2) 0.0783' (P3) 0.0787'' (P4)0.0779'', REF BOMBARDIER REO 601R-53-41-666 REV C DATED 2012-11-06 AND CRJ-200 NDTM PART 4 51-00-001 REV 42. UT THICKNESS GAUGE S/N DBT-CT-1033 CAL DUE 02/19/21. EVALUATED REWORK AREA OF PRESSURE FLOOR ANGLE FS 473.15 TO FS 473.15 + 5 AND LBL 36 TO LBL 42. FOUND TO BE WITHIN LIMITS, REF BOMBARDIER REO 601R-53-41-666 REV C DATED 2012-11-06.