What was found
WHILE AIRCRAFT WAS IN FOR HEAVY CHECK, MAINTENANCE REPORTED DAMAGE TO THE WING STUB SPAR 2. LT AND RT LOWER FLANGE AND WEB GOUGED. MAINTENANCE PERFORMED A MAJOR REPAIR BY BLENDING AREA AFFECTED P/N 170-30546-001 (LT CTR WING BOX @ FR 52 INTERNAL SIDE) IAW ETD2016-170-100405 THIS REPAIR IS CONSIDERED TEMPORARY AS IT WILL REQUIRE A DETAILED STRUCTURAL ANALYSIS. THE VALIDITY OF THIS REPAIR IS 12 MONTHS AS OF NOVEMBER 12, 2016. AIRCRAFT IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK COMPLETION.