What was found
AIRCRAFT WAS GROPUNDED: DURING APPROACH AT FLAPS 5 AT 210 KNOTS, ALL THREE GEAR RED UNSAFE LIGHTS, SPEED BRAKES EXTENDED, AND SPEED BRAKE DO NOT ARM LIGHTS ILLUMINATED WITH GEAR UNSAFE HORN SOUNDING WHEN THE SPEED BRAKE HANDLE WAS EXTENDED TO ABOUT THE 60% POSITION. ALL INDICATIONS WENT AWAY WHEN SPEED BRAKE HANDLE WAS STOWED. INDICATION REPEATED WITH SUBSEQUENT SPEED BRAKE EXTENSION. SPEED BRAKE HANDLE SEEMS UNUSUALLY STIFF. PERFORMED OPERTIONAL CHECK OF SPEED BREAK AND BITE TEST OF PSEU, PER AMM 32-09-10. REMOVED AND REPLACED NUMBER 1 RADIO ALTIMETER TRANSCEIVER, OPERTIONAL CHECK GOOD. PER AMM 34-33-21.