What was found
LANDING GEAR FAILED TO EXTEND IN POSITION NR 1 OR NR 2. COMPLIED W/ QRH - MANUAL EXTENSION OK. EMERGENCY DECLARED. T/S IAW TSM 32-61-00. PREFORMED BITE TEST PROX DET. BOX FOUND FAULT CODES P2, P4. (EXTERNAL PWR SUPPLY BUS). IAW MM 32-33-00-02 RESTORED FREEFALL EXTENSION SYS TO NORMAL OPERATING CONDITION. GEAR DOORS CLOSED AND GEAR PINS INSTALLED. GEAR PINS REMOVED AND STOWED IN COCKPITS FOR FLIGHT. CHECKED WIRING AT LANDING GEAR SELECTOR VALVE REF AWM 32-31-01. ALL CHECKS NORMAL. R & R ELECTRO HYD VALVE 3GA REF MM 32-31-12-04. VALVE LEAKS CHECKS GOOD. PERFORMED OPS/INSPECTION CHECK REF MM 32-31-12-06. OPS CHECK OF GEAR AND LIGHTS NORMAL.