What was found
FLT#21, BOS-PBI. (AIRCRAFT DIVERTED TO JFK). 'ELAC #1 AND #2 FAULT CLIMB AND CRUISE ELEVATOR PITCH OSCILLATIONS; REF LP 4239540 (ELAC # 2 REINSTALLED AFTER MX PER AMM 27-93-33. OPS CHECK OK. CATIII TEST REQ), 4239545 (REMOVED AND REPLACED LH ELEVATOR SERVO 34 CE1 PER AMM 27-34-51, OPS CHECK AND LEAK CHECK & RIGGING REQUIRED REF LP 4239547-10), 4239546 (REMOVED AND REPLACED CHECK VALVES 1019 GM AND 1020GM PER AMM 29-00-00. LEAK CHECK OK. HYD PRESSURE STILL FLUCTUATING AT IDLE PRESSURE REQ FURTHER T/S) & 4239547 (PERFORMED LEAK CHECK AND OPS CHECK OF SERVO 34CE1 LEAK AND OPS CHECK GOOD REF AMM 27-34-00) FOR ALL WORK ACCOMPLISHED. OPS CHECK OF ELEVATORS GOOD REF AMM 27-43-00.'