As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEADING EDGE FLAPS LIGHT ON AFTER TAKEOFF, FLAPS SELECTED UP NR 2 SLAT DID NOT RETRACT. HYDRAULIC QUANTITY FLUCTUATES FROM 4 TO 2.4 GALLONS. AIR TURN BACK TO BRU. SERVICED AND PURGED 'A' SYSTEM, LEADING FLAPS AND SLATS OPERATED, SYSTEM OPS AND LEAK CHECKS GOOD, 727 MM 27-81-0. (M)