A300
Flight Crew Last 90 Days 80; Flight Crew Total 9000; Flight Crew Type 1500
Distraction; Communication Breakdown; Troubleshooting
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural MEL / CDL; Deviation / Discrepancy - Procedural Maintenance
Flight Crew FLC complied w / Automation / Advisory; Flight Crew Landed As Precaution; Flight Crew Returned To Departure Airport; Flight Crew Took Evasive Action
Procedure; Aircraft
Scheduled to operate in an aircraft with some questionable deferrals.  I expressed my concerns to the Duty Chief Pilot; Dispatcher; and Maintenance.  Upon raising the landing gear after takeoff; using LDG Gear Warn Sys 2; received ECAM warning message of: GEAR SYS 2 FAULT.  Followed ECAM and switched to Sys 1; thought it would be OK; above 10;000 MSL while accelerating to climb speed; received Gear Warning Overspeed message.  Both PFDs displayed red zipper and ECAM had overspeed warning message.  Was in conference with Dispatch and Maintenance immediately following; and consensus was this is not how the system should be working.  Lost direct contact with Dispatch via radio (weren't able to use ACARS at all-deferred prior to block out); received message from ARTCC to return to the departure airport.  Didn't declare an emergency; because it appeared the gear was retracted and would have in the event we didn't receive a gear green down and locked; which we did.  Landed uneventfully.
[Narrative #2 contains no additional information.]
An A300 crew departed after expressing their concerns about the aircraft's airworthiness and immediately after takeoff the ECAM alerted GEAR SYS 2 FAULT with normal indications. While accelerating and troubleshooting the GEAR OVERSPEED alerted so the flight returned to the departure airport.