What was found
CUSTOMER REQUEST PER MONTHLY-LW OB TE AFT FLAP LOWER INBOARD SKIN DELAMINATED. GROUNDED - YES. REPAIRED L/W O/B T/E AFT FLAP I/B SKIN DELAMINATION IAW B737-900ER SRM 57-53-01-2R-16 REP.16 51-70-10-2R-0. THIS IS AN INTERIM REPAIR AND WILL REQUIRE TAP TEST INSPECTION EVERY 6,875 FLIGHT CYCLES ON 30 MONTHS (WHICHEVER IS FIRST ) IAW B737-900ER SRM 51-10-06 AND GENERAL OVER HONEYCOMB AREAS. REMOVED LH OB AFT FLAP TO FACILITATE REPAIR, REINSTALLED & VERIFIED PROPER ADJUSTMENT. REF B737-900 AMM 27-51-22-400-801.COMPLETED CATEGORY B REPAIR.