What was found
ON DESCENT CREW REPORTED GREEN HYD SYS FAILURE, LOSS OF FLUID & PRESS. DECLARED AN EMER & LOWERED THE GEAR MANUALLY. FLIGHT LANDED WITHOUT INCIDENT BUT WAS TOWED TO THE GATE. MX FOUND HYD PRESS LINE B NUT TO GREEN PTU MANIFOLD 1113GM LOOSE. TIGHTENED B NUT AS REQUIRED. FOUND GREEN RESERVOIR NOT DEPLETED. SERVICED GREEN HYD SYS & ACCOMPLISHED OPERATIONAL CHECK OF SYS IAW AMM 29-11-00-710-001-A & 12-12-29-611-001-A. OPERATIONS CHECKED OK. PUT THE LG SYS BACK TO NORMAL MODE AFTER FREEFALL EXTENSION IAW AMM 32-00-00-860-003-A.