What was found
DURING HEAVY MAINTENANCE: CORROSION ON FR 88 BTW STGR 28R AND 27R IN AFT CARGO COMPARTMENT; REMOVED CORROSION AND FOUND OUT OF LIMITS. REMOVED AND REPLACED FRAME IAW E190 SRM 51-10-03, 51-12-01, 51-75-16, 51-41-02, 51-43-01 AND JETBLUE GMM 8.18.4.1 PAR 13 REV 29. WORK ACCOMPLISHED ON TOMX NR 00264. (CONSIDERED AS A MAJOR REPAIR)