As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
R/H HORIZONTAL LWER SKIN IS CRACKED AT APPROX STA 100 12 INCHES FWD OF REAR SPAR. GROUNDED - YES. REPAIRED RH HORZ LOWER SKIN CRACK AT APPROX STA 100 12" FWD OF REAR SPAR IAW 737-900 SRM 55-10-01-2R-11 AND ALASKA AIRLINES EA NO CMPT 55EA-23891.