Narrative:

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.

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Original NASA ASRS Text

Title: A300 flight crew reported gear did not retract after takeoff.

Narrative: 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.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.