What was found
(CAN) AFTER T/O, "GEAR DISAGREE" WARNING MSG ON LDG RETRACTION. NOSE GEAR DOES NOT RETRACT. FLIGHT ABORTED. ALTERNATE LDG EXTENSION PERFORMED. A/C LANDED AT ORIGIN AIRPORT (VLC). FUNCTIONAL TEST OF LDG EXTENSION/RETRACTION SYS IAW AMM 32-30-00-720-801 PERFORMED AND OK. AS A PREVENTIVE MEASURE, NLG PRIORITY VALVE IAW AMM 32-33-15-000/400-801, AND THE PSEU AS AMM 32-61-01-000/400-801 WERE REPLACED. NLG SHOCK ABSORBER WAS SERVICED IAW AMM 12-12-32-610-803.