What was found
LH WING AILERON PN CC670-13000-1 HAS INTERNAL STRUCTURE CORROSION. ***AIRCRAFT REMOVED FROM SERVICE*** REMOVED AND REPLACED LH WING AILERON PN CC670-13000-1, SN 7693. PERFORMED RIGGING CHECK AND OPERATIONAL TESTS OF THE FLIGHT CONTROL SYSTEM. ALL WORK WITHIN LIMITS WAS PERFORMED IAW AIR WISCONSIN SUPPLEMENT NO. 19-047 DATE OF ISSUE 3/22/2019, CRJ200 AMM 27-11-00-710-803 REV 64 AND CRJ200 AMM 27-11-00- 220-801 REV 64. WORK PERFORMED UNDER AERSALE WORK ORDER 003526, CARD NO. 20368, TT: 39,745:56 TC: 39,335.