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Honeywell proposes 25% F-35 cooling upgrade to address overheated electronics

Honeywell Aerospace is proposing the P40 power and thermal management system upgrade for Lockheed Martin’s F-35, offering a 25% increase in onboard cooling capacity. The company says the interim upgrade could be rolled out in three to four years, with a 40-kilowatt PTMS milestone announced for September 2026.

Discovered 2026-09-22T11:35:46.241706-07:00 | 2026-09-22T11:35:46.241706-07:00

Briefing

What Hype is tracking

The proposed P40 upgrade targets the F-35’s power and thermal-management constraints, increasing onboard cooling capacity by 25% to support overheated electronics.
A three- to four-year rollout timeline makes integration, retrofit planning and long-term sustainment considerations relevant for the F-35 program and its operators.

Reported By

interestingengineering.com defence-industry.eu Janes FlightGlobal Aviation Week insidedefense.com