What was found
WHILE A/C WAS IN FOR HEAVY CHECK CORROSION FOUND ON FWD FUSELAGE SHEAR CLIP AT FR 17 BETWEEN STR 27LT AND 28LT. REPLACED SHEAR CLIP PN 170-03870-001, IAW SRM 51-41-02, 51-43-03. SEE AAR NRC 4500836-1000-0142. A/C REMAINS IN YQG FOR COMPLETION.