What was found
A/C WOULD NOT PRESSURIZE ON CLIMB-OUT OF MEM. LEVELED OFF AT 9000. CABIN VSI CLIMBING AT SAME RATE AS A/C CLIMB. NR 2 FWD AND AFT VALVES DISPLAYED FULL OPEN AND AMBER IN COLOR. NR 1 FWD AND AFT OUTFLOW VALVES OSCILLATED VIOLENTLEY OPEN AND CLOSED THROUGH FLT. RETURNED AND LANDED IN MEMPHIS. NO ECAM FAULTS DISPLAYED THROUGH OUT WITH REGARD TO REG NR 1 OR NR 2. FOUND UNION WHERE AFT NR 2 JET PUMP HALVES CONNECT VERY LOOSE. TIGHTENED CONNECTION, ALSO REMOVED JET PUMP IAW A310 MM 21-31-00-5-01. PUMP WAS CLEAN OF ANY DIRT OR OTHER OBSTRUCTIONS. REINSTALLED IAW SAME REF. REMOVED REPLACED RELAYS 60GB (RLY-MLG) AND 45GB(RLY-MLG). PERFORMED ADJ/TEST IAW A310 MM 21-31-00-5-01. ALL TESTS PASSED.