Ercoupe Service Bulletin 15

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ERCOUPE SERVICE BULLETIN No. J5 Fuel System-overflow Line I Erco part No. 415-48J62) This bulletin affects Ercoupes serial number 2623 to 2994 inclusive, with the exception of the Ercoupes on which the change was effected prior to delivery. The exceptions are listed as an appendix to this bulletin. The change is being made because a report has reached us to the effect that the imperial brass com- pression sleeve No. 60F, located on the fuselage gas tank overflow line at the tank mounting flange, has necked the line causing it to fail. This sleeve has been changed to a rubber washer No. A594, Kohler Company or A-64-3, Hayes Industries, Inc. As the brass . sleeve cannot be removed from the gas line once it has been compressed, a complete new line must be installed. The procedure for replacing the fuselage gas tank overflow line is as follows: I. Drain Fuselage Gas Tank. a. Turn fuselage gas tank valve to "off" position. b. Open left side engine cowling. c. Disconnect gas line at filter bowl (remove clamp from hose), d. Drain gas through hose into container by opening gas valve. 2. Provide Access and Remove Overflow Line. a. Remove oil pressure gauge line after discon- necting the fitting from the pressure gauge on instrument panel and the bulkhead filling on the firewall. b. Remove main gas line after disconnecting the filling on the shut-off valve and the bulkhead fitting on the firewall. c. Remove tubing clamp from overflow line, lo· cated directly above the elbow on frame "B." d. Disconnect overflow line at elbow on frame "B" and at the forward opening of the mount- ing flange on bottom of fuselage gas tank. e. Remove the overflow line by moving the lower end of the assembly to the rear of the airplane as the upper end is being withdrawn from the tank through the fitting on the flange. 3, Install Overflow Line. a. Insert the upper end of the assembly into the tank through the fitting on the mounting flange, reversing the order of removal. b. Assemble the union nut loosely on the lower end of the overflow line to the elbow located on frame "B." Use Parker Sealube No. 6 P.E. or equivalent material when assembling the threaded fitting. Do not tighten this fitting until the following operation is completed. c. Relocate the overflow line support clamp in· stallation by measuring 3" down on frame "B" from the old location and drilling a No. 27 hole. Install location and secure the clamp. Tighten the nut on the overflow line at the ell!> ow on frame "B," installed in the preced- ing operation. d. Assemble the union nut on the upper end of the overflow line assembly, being certain that there is a rubber washer within the nut. Use thread lubricant. e. Replace the main gas line and oil pressure line reversing the order of removal. Use thread lubricant on assembly and avoid excessive lightening which will damage flared ends on tubing assemblies. Page 2-IULLETIN No. 15 f. Check fuel level in fuselage gas tank by add- ing fuel (tank valve closed) until the fuel flows through the overl!ow line to the left wing tank. At this time. the fuel level should be between %" and 1" below the bottom of the fuselage tank filler neck when measured from the rearmost part. The level may be corrected by relocating the overllow line alter loosening the union nut on the mounting flange and moving the line up or down as required to obtain the proper level. The overllow line should be reformed when establishing a new level to prevent the level changing later by slip- ping through the fitting. Reforming is necessary since the union nul and rubber washer will not satisfactorily retain the position of the overllow line when strain in the assembly lends to move the line. g. Connect gas line at filler bowl. If the bowl on the fllter contains any air, it will be necessary to loosen the bowl retainer and bleed the air off with the fuselage gas tank valve in the ..on" position. Overllow line assemblies are being shipped. to each distributor, on a no-charge basis, in sufficient quantities to correct the alfected Ercoupes immedi- ately. The cooperation of the distributor /dealer organi- zation in effecting this change immediately is im- perative. A fmlure of the subject part would prob- ably result in an immediate forced landing. APPENDIX NO. J ERCOUPf SERVICE DEPARTMENT BULLETIN Number 15 List of Ercoupes between serial numbers 2623 and 2994 on which the subject change has been com- pleted prior to delivery. 2649 2810 2884 2928 2686 28!l 2885 2929 2690 2814 2887 2932 2693 2815 2888 2933 2706 2825 2889 2935 2707 2832 2891 2936 2709 2833 2893 2939 2710 2835 2895 2941 2745 2837 2897 2943 2749 2841 2899 2944 2750 2843 2900 2947 2754 2848 2901 2952 2759 2851 2903 2953 2770 2857 2905 2955 2774 2869 2907 2959 2783 2872 2908 2963 2797 2873 2912 2968 2801 2876 2913 2969 2802 2877 2915 297l 2803 2880 2920 2975 2805 2881 2921 2977 2806 2883 2924 2981 2845 2863