PROCEDURE 3: PERFORM MEASUREMENTS

Figure 24. No. 1 Engine Output Shaft Optical Tachometer Sensor Installation

TM-1-6625-724-13P Aviation Vibration Analyzer Manual
Page Navigation
322

TM 1-6625-724-13&P 0069 00 0069 00-41 PROCEDURE 3: PERFORM MEASUREMENTS NOTE Tape placement may be verified by applying aircraft power, then rotating the shaft by hand until the tape passes beneath the sensor. A red LED will illuminate on the back of the sensor if a return signal from the tape is present. NOTE No. 2 engine must not be running during the No. 1 engine output shaft vibration level check. No. 1 engine must be run at 100% Nr for five minutes prior to the measurement being taken. a. Place the DAU power switch in the ON position. b. Turn on CADU. c. Apply 28 Vdc power to the DAU e. Press QUIT until all the selections on the Main Menu are undefined. f. Start and run No. 1 engine at 100% Nr, flat pitch. g. Use cursor keys to highlight Aircraft Type, and then press DO. h. Use cursor keys to highlight UH-60, and then press DO. i. Tail Number is highlighted. Press DO. j. Use cursor keys to highlight a tail number or enter a new one (up to seven digits), then press DO. k. Flight Plan is highlighted. Press DO. l. Use cursor keys to highlight ENG 1. Press DO. m. Enter the Measure mode by pressing F1. Verify that Test State ENG_1 is highlighted. n. Press DO when the aircraft is stable at the highlighted selection. Verify that the aircraft is at the required Test State and press DO again. The AVA will acquire vibration data and return to the selection menu. o. After the measurement is completed, press DO on Finish, then press DO on Main Menu. NOTE No. 1 engine must not be running during the No. 2 engine output shaft vibration level check. No. 2 engine must be run at 100% for five minutes prior to the measurement being taken. p. Shut down No. 1 engine. Start and run No. 2 engine at 100% Nr, flat pitch. q. Use cursor keys to highlight Flight Plan. Press DO. r. Use cursor keys to highlight ENG 2. Press DO. s. Enter the Measure mode by pressing F1. Verify that Test State ENG_2 is highlighted. t. Press DO when the aircraft is stable at the highlighted selection. Verify that the aircraft is at the required Test State and press DO again. The AVA will acquire vibration data. u. Shut down No. 2 engine

Privacy Statement
Press Release
Contact