A New Way of Flight Trainingâ¦ - American Bonanza Society

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www.bonanza.org Fuel quantity resistance values Andrew Westin, Miami, Florida Is there a reference table giving Q. resistance to quantity in my F33A’s 40-gallon fuel tanks I am pre suming that the relationship is not linear. We do not know of any chart giving resistance values related to A. intermediate fuel quantities. I wish I could come up with one! The published full and empty values for the transmitters: • Inboard full 76 ohms, empty 0 ohms • Outboard full 43 ohms, empty 0 ohms Both are indeed non-linear. Two articles on the Maintenance & Operations page for your Bonanza on the ABS website (under Members Only) will give you some good info on this: • Beech fuel quantity indicating system troubleshooting • Beech fuel indicator and failure modes If you find that you have defective components, here are some facilities that can help with repairs: Gauges and transmitters • Air Parts of Lockhaven 800-443-1117 or airpartsoflockhaven.com • Central Oregon Air Parts 541-997-3610 • Aircraft Instrument Rebuild 360-683-6245 or fuelsenders.com Transmitters only • John Wolf 440-942-0083 or johnwolfco.com Circuit boards only • Birks Aviation Products 309-686-0614 or birksaviation.com —AM On time or on condition Karl Beutner Fairfield, California I have a 1993 A36. Should the Q. alternator be removed and inspected at each annual Beech publishes an “Overhaul and Replacement Schedule,” which indicates that a number of items be replaced at 2,000 hours. Are there any of the listed items that one should consider replacing more than the others A. Frequent inspection of the alternator is suggested because failure of the gear drive bearings usually damages the crankshaft drive “ring” gear, and replacement of the ring gear requires engine removal and teardown. Inspections are a little bit of money to potentially save a lot of money. The larger Continental Motors alternators 64 AMERICAN BONANZA SOCIETY JANUARY 2012
www.bonanza.org are considerably more robust than the smaller (70 amp) Prestolite alternators, but removal and inspection each 500 hours is a reasonable schedule. If you decide to have your alternator rebuilt we have had good service from Aircraft Systems in Rockford, Illinois (815-399-0225) and Aircraft Electrical Components in Redding, California (530-221-4397). Flying under FAR 91, we are pri vileged to replace or overhaul parts “on condition” if they are not restricted by an Airworthiness Directive or a Continued Airworthiness Limitation. The manufacturer’s suggested over haul/ replacement schedule is a good conservative guide with a few exceptions, i.e. if the landing gear gearbox is not leaking and has no excess clearance in the worm drive I would not remove it for overhaul at 2,000 hours. The landing gear and flap motors should be overhauled on schedule, and I like to inspect or replace wing bolts at 2,000-hour intervals. There are many bushings in the nose gear steering, gear doors, landing gear, cabin doors, flaps, etc. that should be evaluated at each maintenance event to minimize accumulated looseness and to keep the aircraft “as delivered.” One of the items we are emphasizing currently is a complete landing gear rod end change at approximately 2,000 hours. —BA Fuel flow fluctuations Chip Ridley Danville, California My B36TC has begun to ex perience a small fluctuation Q. in fuel flow at all power settings. My JPI shows fuel flow / .5 GPH, and on occasion I can feel the engine pulsing. The #6 cylinder shows EGT fluctuat ing / 5 degrees. The other cylinders don’t appear to be fluctuating. I got new spark plugs at my annual and recently adjusted the high-power fuel flow setting. I would love any thoughts since my A&P is struggling with this. Normally when we see this problem, it is caused by A. wear in the engine driven fuel pump, and is more evident in high-time pumps. I would suggest that you check the high and low pump settings with external gauges as per TCM SB 97-3E, and pay particular attention to your upper deck reference lines for any wear spots or holes. Any damage to the lines will allow ambient air in and cause problems also. Also, there may be a restriction in the fuel flow divider in the area of the port to the injector line to the #6 cylinder. —BR Leaking landing gear gearbox Steve Chefan, Wellington, Florida My landing gearbox is leaking. Who can rebuild Q. it Are they available for exchange, or do I have to remove mine and send it out The first thing to verify is that the gearbox is A. not overfilled with oil. With the plug removed, the oil should only be high enough so that by turn - ing the hand crank, it will bring up oil from the bottom side of the shaft. An alternate way to check the level is to use a dipstick. It should only have about 1 /4-inch of oil showing on the dip stick when inserted beside the worm gear shaft. Hawker Beechcraft does offer an overhaul exchange on most of the gearboxes; however, they are quite expensive. If you can stand the down time, I suggest you have your unit overhauled. Shops we have good reports on are Aircraft Systems, Rockford IL (815-399-0225), CruiseAir, Ramona, CA (760-789-8020), and B&S, Wichita KS (316-264-2397). —AM To submit your questions: Go to the Members Only section of the ABS website and click on Tech Tips (listed under Technical). Volume 12 • Number 1 AMERICAN BONANZA SOCIETY 65
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January 2012 VOLUME 12 • NUMBER 1
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January 2012 VOLUME 12 • NUMBER 1
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www.bonanza.org Maintenance Academy
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www.bonanza.org DayBreakers!” eac
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On The Cover: Beechcraft of the Mon
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A New Way of Flight Trainingâ¦ - American Bonanza Society