As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
R/W INSIDE TANK ACCESS PANEL 632RB VIEW LOOKING UP AND AFT STRINGER U9 HAS A CRACK IN END OF STRINGER AND APPEARS TO END AT FASTENER . REPAIRED R/W U9 STRINGER IAW UNITED ECRA 5720-03520 REV ORIGINAL AND ACCOMPLISHED FUEL LEAK CHECK IAW B737-900 AMM 28-11 -00 LEAK CHECK GOOD.