Rick McWilliams Posted March 2, 2010 Report Share Posted March 2, 2010 I made my first night flight in Susies R22. My flying was not very good. The 430 display was too dim and hard to read. The post lights were not aimed quite right. It took more time to scan the new look of the instruments. The night was beautiful. I navigated by roads and GPS. CMA was very quiet. The airport lighting was very beautiful and the runway very long. I decided to approach to the numbers, hover and then depart. As the landing light showed on the runway the alternator light activated. After a short hover I departed for the 7 minute flight to home base. The ammeter showed no discharge with the landing light off. Cycling the alternator switch did not make a change. After landing I found the alternator was very hot. Battery voltage after shut down was 12.7 volts. The next day I did a more complete test run. Battery voltage before start 12.66v. Alternator started at 66 degrees F. With normal instruments on the battery voltage dimished to 12.2 volts, alternator light showed, ammeter showed about -5 A. The clamp on amp prove confirmed -7A at the battery, 0A alternator, 0 A field. Turning on the alternator switch produced 11A alternator and 2A field. The battery voltage rose to 12.9 volts and the alternator light turned off. The alternator proceeded to get hot 210 degrees F. Normal shut down. In the hangar I found that the HID landing lights draw 19A and then dimish to 7A after 30 seconds. The alternator stayed very hot for half an hour. I disconnected the belt and the alternator turned easily indicating no bearing problem. I suspect that there is an internal winding or diode failure. I am having the alternator replaced tomorrow. Do R22 alternators have short lives? This one is clearly a rebuilt unit. What are the other typical mainteneance items for R22? Quote Link to comment Share on other sites More sharing options...
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