* 1 each required for aircraft serial numbers 177RG0001 thru 177RG0282 and F177RG0001 thru F177RG0062.
* 2 each required for aircraft serial numbers 177RG0283 thru 177RG1366 and F177RG0063 thru F177RG0177.
For ordering details, go to Fuel Reservoir Drain Valve Parts.