What was found
CAPT REPORTED VHF-NAV NR 1 FAILED. DURING MX REVISION, FIVE REPORTS WERE DETECTED ON MX LOGBOOK. 1. VHF NAV 1 WITH OSCILLATIONS DURING FLIGHT AND TAXING. VHF COMPUTER WAS RESEATED AND TESTED IAW MM 34-50-00, ALL CORRECT. 2. DURING FLIGHT AUTO THROTTLE ACCELERATOR WAS OUT OF SERVICE. IN GROUND TEST WAS PERFORMED IAW MM 22-31-00, ALL CORRECT. 3. VHF NAV 2 WITH INDICATION AND SPEED MACH INFO DAMAGED. VHF NAV PANEL WAS REPLACED AND TESTED IAW MM 34-51-00, ALL CORRECT. 4. DURING LANDING GPWS FAILED. GPWS GROUND TEST WAS PERFORMED IAW MM 34-43-2, ALL CORRECT. 5. ILS DID NOT ENGAGE TO THE AUTO PILOT AND FREQUENCY WAS NOT RECEIVED. VHF NAV 1 WAS REPLACED IAW MM 34-51-00, TESTED CORRECT.