If turbine fuel is inadvertently put into a reciprocating engine's fuel tanks and the engine is run, what steps should be taken to correct the situation?

• A. Drain and flush the entire fuel system with gasoline, perform a compression check, borescope inspect all cylinders, drain the oil and check all filters and strainers, and then perform a proper run-up after fueling.
• B. Drain only the fuel and try again.
• C. Replace the engine.
• D. Ignore and proceed.

Answer: (A)

Contamination of a reciprocating engine by turbine fuel requires a thorough purge and thorough inspection to prevent damage from improper fuel residues and potential fuel-system incompatibilities. When turbine fuel accidentally enters the engine, stop and remove all fuel from the system, then flush the entire fuel system with the correct aviation fuel (avgas) to remove any turbine-fuel residues. Since fuel dilution can contaminate the oil and reduce lubrication, drain the engine oil and inspect or replace filters and strainers as needed. The possibility of internal damage or deposits should be checked, so perform a compression check and use a borescope to inspect all cylinders for scoring, varnish, or other signs of fuel-related damage. After ensuring the fuel system, oil, and filters are clean and any damage is ruled out, refill with the proper fuel and carry out a proper run-up to confirm the engine runs smoothly and within limits. Replacing the engine or ignoring the situation is not appropriate, as the contamination can cause serious, avoidable damage.