What was found
MCI - DURING OP 16 MAINTENANCE CHECK, FOUND LONGERON 17L CRACKED AT LOWER FLANGE AT LONGERON TO FORMER FRAME ATTACH FASTENER. REMOVED AND REPLACED LONGERONS PER SRM 51-01, STANDARD PRACTICES, AND PER SRM 53-02-00, FIG 18 AND 53-03. (M)