Pentagon will replace F135 engines for fifth-generation fighter jets if contaminated metal components are found

Components made from contaminated metal powder have been found in Pratt & Whitney engines. The problem affects almost all of the company's powerplants.

Here's What We Know

As of now, there are no fifth-generation F-35 Lightning II fighters with the problem. However, the US Department of Defence has confirmed that if a problematic F135 engine is found, it will be replaced in stock. It will not have a major impact on operations.

A spokesman for RTX, which includes Pratt & Whitney, said any changes to fleet management would have a limited impact. The F-35 programme directorate agrees, saying the problem will have little or no impact on the fifth-generation fighter fleet.

The situation has its roots in a quality control error in 2015. Eight years ago, Pratt & Whitney received powdered nickel with minor contaminants from a supplier. The problem became apparent three years later.

In subsequent testing, it was discovered that the contaminated metal powder could cause parts to fail and have less overall durability. Pratt & Whitney is expected to be able to replace all components by the end of 2025.

The F-35 programme directorate says this is a low-risk issue in the case of the F135. No components made from contaminated metal powder have been found in engines for the fifth-generation fighter in several years.

The PW1100 powerplants for Airbus A320 airliners were the first to suffer from the problem. Two years ago, Pratt & Whitney began producing components from the new material and reorganised production facilities to produce parts faster.

Source: Air & Space Forces Magazine