A300
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Provided Assistance; Aircraft Equipment Problem Dissipated; Flight Crew Landed As Precaution; General Flight Cancelled / Delayed; General Maintenance Action
Procedure; Aircraft
On take-off runway XX; received flashing green hydraulic pump low pressure. Landing gear would not retract. The ECAM was indicating that the green pumps failed. Leveled at 2000 ft. [Requested priority handling] with ZZZ departure. After 2-3 minutes; the hydraulic issue stopped. Pumps back to normal. Raised landing gear. No other issues noted. I continued to ZZZ1 for priority handling. No issues with configuring for landing.Aircraft was released from contract heavy maintenance for a right main landing gear change. Maintenance suspects air in green hydraulic system.Possible issue with heavy maintenance at ZZZ.
On departure from RWY XX; when landing gear was selected 'Up'; the gear did not retract and a hydraulic warning was indicated on the Airbus ECAM notification system. The Captain (Pilot Monitoring) [requested priority handling] with ATC and we entered a radar box pattern at 2;000 ft. to stay within appropriate distance of ZZZ runways. The Pilot Monitoring began to accomplish the ECAM steps. Within 2-3 minutes; the hydraulic warning indication recovered and the landing gear was able to be retracted normally. The Captain recovered to ZZZ1 with priority. The aircraft was able to be configured normally for an uneventful landing. Maintenance had recently been accomplished on the right Main Landing Gear. Unknown to what extent that maintenance may have contributed to our situation; but maintenance at ZZZ1 suspected air in the hydraulic line resulting from heavy maintenance. Possible issue with heavy maintenance on right main landing gear at ZZZ.
A300 flight crew reported gear did not retract after takeoff.