If the F-35 upgrades known as Technology Refresh 3 aren't ready for deliveries to resume in the third quarter, Lockheed said it may slow down production.
The US Navy accepted the five-year-delayed Aegis Ashore Poland missile defense system in December, moving it directly into a four-month maintenance period.
The LGM-35A Sentinel nuclear missile has seen its costs increase at least 37%, triggering a review that could see the program restructured or canceled.