Is It Possible To Wash My Jet's Engine Too Much?

April 2026

At Duncan Aviation, we were recently asked by a customer, “Is it possible to wash my jet’s engine too much?” The operator considered his inquiry to be silly when, in fact, it’s a very valid question. In fact, it’s important to periodically clean your engine as part of preventative maintenance. And, if you operate your aircraft in adverse environments, such as air pollution and saltwater exposure, it’s very important to increase your wash schedule.

Chemical reactions with the fuel and heat can cause severe corrosion, which can be significantly reduced through regular gas-path washing. Check with your engine’s service plan to find out if an engine wash and corrosion protection is covered.

PLEASE NOTE: Not all engine OEMs require periodic engine washes. Always consult the relevant maintenance manual for proper washing procedures.

A desalination wash uses water or water/methanol to remove salt and light deposits, but if the engine is experiencing a loss of performance, as indicated by ECTM Trend Monitoring, a performance recovery water wash will be recommended. Cleaning agents are used to remove deposits that cannot be dissolved by a desalination wash.

Some OEMs publish a list of acceptable cleaning agents. It is very important to observe the maintenance manual requirements of using methanol when the outside air temperature requires mixing with the cleaning agent or rinsing solutions.

The Answer To The Original Question Is NO.

Periodically rinse the external portions of the engine, and if you are flying in adverse conditions, absolutely increase your wash schedule. Preventative maintenance, especially when dealing with corrosion, will increase performance and reduce the need for costly repairs.

To discuss this or any other topics concerning your jet engines, please reach out to any Duncan Aviation Engine Tech Rep.

Duncan Aviation Engine Tech Reps

Dillard Knight, Engine Tech Rep—Pratt & Whitney

Shane Mack, Engine Tech Rep—Honeywell TFE731

Robert Montano, Engine Tech Rep—Rolls Royce

Shawn Schmitz, Engine Program Manager and Tech Rep—Honeywell HTF7000