What was found
SEAT 17B SEATBACK LOOSE ON AISLE SIDE. BLOCKS EGRESS FROM SEATS 18A AND 18B. PLACED ON MEL. MEL CLEARED BY REPLACING 17B AISLE SEATBACK HINGE PIN SET SCREW REF E175 CMM 25-26-81 PAGE 10256 FIG 10 ITEM 85. RE-ALIGNED HINGE PIN INTO ARMREST BOSS AND TIGHTENED SET SCREW. SEAT NOW SECURE AND WORKS NORMAL. SEATBACK RECLINE OPS TEST GOOD REF E175 AMM 25-21-11-710-801-A. SEAT DOES NOT BLOCK EGRESS OF OTHER SEATS. RETURNED TO SERVICE.