What was found
LANDING GEAR LEVER LATCH FAILED TO RELEASE DURING GEAR RETRACTION. THE QRH PROCEDURE ON PAGES 2-6-2-12 /13 COMPLIED WITH. LANDING GEAR FAILED TEST NR 1 OF THE PROCEDURE. WHEN THE FLAPS WERE RETRACTED FROM 5 TO 2 DEGREES. AN INTERMITTENT HORN SOUNDED. AN EMERGENCY WAS DECLARED AND UNEVENTFUL LANDING WAS MADE ON RWY 27 AT MEM. R & R MLG ACCESORY UNIT IAW 727-200 AMM 32-09-121-5. JACKED A/C, RETRACTED AND EXTENDED GEAR SEVERAL TIMES, NO DEFECTS NOTED. R & R MLG CONTROL LEVER LOCK SOLENOID PER M/M 32-31-016-4.STILL REQUIRES OPS CK. COMPLETED OPS TEST OF LEVER LOCK SOLENOID AND ALSO RAN GROUND OPS TEST OF LDG GEAR ELECTRONIC MODULE.