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 19) Visually inspect the electric pump, the support, the unions, the vent hose and the connections.   
28-20 20) Clean or replace the fuel filter located close to the electric pump, check the support - refer to 28-20-02 201. 100  
28-20 21) Visually inspect the check-valve (if installed) - refer
to 28-20-05 201. 100  
28-20 S / N 1 - 9999 100  
 22) Visually inspect the engine fuel lines for routing and leaks.   
 Inspect for evidence of interference and wear.   
73-10 23) Visually inspect the mechanical fuel pump. Check attach fittings and connections on the engine pump and the pressure switch. 100  
73-10 24) Check the fuel pump vent line for clogging. 100  
73-10 25) Visually inspect the fuel hoses for condition, attachment and routing. Look for evidence of wear and interference. 100  
73-20 26) Perform an overhaul of the injection pump. 100 Associated
with engine
overhaul 
73-20 27) Visually inspect the injection pump, attach fittings and check for leaks. 100  
73-20 28) Remove and clean the injection pump fuel supply filter. 100  
 Install the filter - refer to 73-20-01 301.   
 

ATA "80A" MAJOR INSPECTION
ENGINE COMPARTMENT INSPECTION (AREA 100) AREA OTHER INSPECTION
PERFORMED
BY
73-10 29) Visually inspect the flow distributor. 100  
73-10 30) Remove, clean, visually inspect and reinstall the fuel injector nozzles - refer to 73-10-02 201. 100  
73-10 31) Check for discoloration at the fuel injector nozzles 100  
 (evidence of leak) and check the lines for attachment 
refer to 73-10-02 201 and the latest issue of LYCOMING   
 Service Bulletin No. 342.   
73-00 32) Check the fuel system for leaks and security of the clamps. 100  
73-30 S / N 1 - 730 100  
 33) Visually inspect the fuel flow totalizer sensor on the engine mount (if installed), check the unions and
connectors for condition.   
28-00 S / N 1 - 9999 000  
 34) Inspect the fuel system for tightness (from the electric pump to the power plant equipment) - refer to   
 28-00-00 201.   
61-10 35) Remove and thoroughly inspect propeller spinner 111 for cracks, check the attach fittings - refer to 61-10-00 401. 100  
　
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