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N983LK
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Date:  12-3-2021
Number of Hours:  6.50
Manual Reference:  
Brief Description:  Fuel flow test and second engine run.

Installed nutplates on the upper intersection fairings to fasten the fairing split lines together. Reinstalled the fairings on the airplane and redrilled the mounting holes ( I had taken them home and layed up a few additional plies in the mounting hole areas to add thickness for the countersinks.) Countersank the mounting holes and fastened the fairings to the fuselage.

Reinstalled the RH wing root fairings and the LH and RH outboard wing inspection panels.

Fuel flow test - Removed the fuel line at the fuel servo inlet and connected an aluminum tube/rubber hose combo to it. Placed the hose in an empty fuel can and placed the can on a scale. Zeroed the scale out. Using the FAA’s guidance for the calculations I determined that if my system will pump at least 4 gallons (24 pounds) of fuel in 10 minutes it will meet the required fuel flow for my engine. With the fuel selector on the LH tank, I turned on the boost pump and started the timer. When the scale read 24 pounds, I turned off the boost pump and stopped the timer. Only 3.4 minutes had elapsed. This translates to roughly 66 gallons per hour which is well beyond the required amount. Poured the fuel back in the LH tank and repeated the test using the RH tank with similar results. Reinstalled the fuel line on the fuel servo.

Pulled the airplane out on the ramp to run the engine again to adjust the idle speed and mixture. Started the engine and warmed it up to 90 degrees (The Reiff heater had been on for 6 hours and the oil was at 75 deg F before engine start). Once it reached 90 I increased the throttle to 1800 RPM and pulled the prop lever back to test its function. There was no change at first but once the oil flowed to the prop the RPM decreased at which point, I pushed the lever full forward. With the engine still at 1800 RPM I turned off each of the mag switches one at a time and verified a drop in RPM and increase in EGTs.

Adjusted the idle speed screw until the idle was roughly 650 with the throttle lever full aft. Adjusted the idle mixture
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Intersection fairing with nutplate installed

Intersection fairing with nutplate installed

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LH intersection fairing in place

LH intersection fairing in place

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Fuel flow test set up

Fuel flow test set up

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