SOLID STATE FLIGHT DATA RECORDER (SSFDR); RECORDS UP TO 25 HOURS OF FLIGHT DATA AT EITHER 64 OR 128 WORDS PER SECOND; UNIT CONTAINS AN UNDERWATER LOCATOR BEACON AND OPERATES ON 115 VAC OR 28 VDC; CHASSIS AND RECORDER CASE MADE OF ALUMINUM SHEET METAL WITH ELECTRONIC PARTS AND A ULB WITH LITHIUM BATTERY