What was found
AIR TURN BACK, GEAR FAILS TO RETRACT AFTER TAKEOFF. AIR TURN BACK TO RFD REF TSM 32-61-00/101. PSEU FLAGGED CODE 70 INTERNAL BOX FAULT. PERFORMED R & R OF PSEU BOX 54GB REF AMM 32-31-71-401. OPS CK NORMAL, CODE 70 NO LONGER DISPLAYED. RETURNED TO SERVICE.