What was found
FLT 4193 - DURING VISUAL APPROACH INTO MYR FROM ATL, AT APPROX 1,800 FT THE CREW RECEIVED FAULT INDICATIONS INCLUDING DC NR 1 BUSS OFF AND LOSS OF THE DC NR 1 GENERATOR, INCLUDING AN INTERMITTENT FAILURE OF DC NR 2. THE CREW ALSO LOST COMMUNICATIONS 1 AND THE INTERPHONE. CABIN PRESSURE MADE RAPID FLUCTUATIONS ALONG WITH OTHER SYSTEMS FAILING INTERMITTENTLY. QRH PROCEDURES WERE COMPLIED WITH AN AN EMERGENCY DECLARED. THE AIRCRAFT LANDED SAFELY IN MYR. MAINTENANCE REMOVED AND REPLACED THE NR 1 GENERATOR, NR 1 GENERATOR CONTROL UNIT AND THE DC POWER BUSS CONTROL UNIT. OPS CHECKS DURING ENGINE RUN AND CROSS STARTS GOOD. AIRCRAFT OK FOR SERVICE. (M)