As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L/W INSIDE TANK ACCESS PANEL 532RB VIEW LOOKING UP AND AFT STRINGER U9 HAS A CRACK IN END OF STRINGER AND APPEARS TO END AT FASTENER. REPAIRED L/W U9 STRINGER IAW UNITED ECRA 5720-03519 REV ORIGINAL AND ACCOMPLISHED FUEL LEAK CHECK IAW 737-900 AMM 28-11-01 LEAK CHECK GOOD