What was found
AIR TURN BACK, WHEN RAISING GEAR ON TAKE OFF WITH GEAR DIDN€™T RAISE. RECIEVED GEAR DISAGREE AND GEAR DOOR EICAS MESSAGES . RESULTED IN AIR TURN BACK MX NOTED EICAS MSGS & PLF (MSG : 32717,32715,32677,32675). PSEU REPLACED AS PER AMM 32-09-03/401. NO HELP. MORE T/S PERFORMED WITH SSM 32-31-11-101,32-35-02-101, WDM 32-31-11-1 & OTHER MAINTENANCE DOCUMENTS RLATED WITH ISSUE. MX NOTED BOTH WING GEAR DOORS ARE NOT OPENED. SUSPECT WING GEAR SELECT/BYPASS VALVE. REPLACED WLG SELECT/BYPASS V/V IAW AMM 32-31-03/401. PERFORMED L/G CONTROL SYS - FUNCTIONAL TEST IAW 32-31-00-860-801 IN HANGER. PERFORMED L/G SWING OPC CHK ON JACK AND TEST NML. OK FOR SVC.