Northrop Grumman completes B-2 Spirit of Kitty Hawk overhaul, restoring stealth surfaces

By Martin Chomsky (Defence Industry Europe)

Air |
Northrop Grumman completes B-2 Spirit of Kitty Hawk overhaul, restoring stealth surfaces

Image: Northrop Grumman.

The B-2 Spirit of Kitty Hawk returned to Whiteman Air Force Base in Missouri on October 7 after Northrop Grumman completed its scheduled depot maintenance. The bomber underwent structural repairs and restoration of its stealth surfaces at Air Force Plant 42 in Palmdale, California.

Northrop Grumman announced the aircraft’s return in a social media post, describing it as restored and mission-ready with “next-gen stealth and enhanced survivability.” The Air Force said the bomber will enter the 509th Bomb Wing’s modification line this month for additional low-observable and communications upgrades.

Spirit of Kitty Hawk, tail number 93-1086, is one of 20 aircraft in the Air Force’s B-2 inventory. Returning aircraft from depot maintenance increases availability within that small fleet.

“The B-2 is a small fleet,” said Lt. Col. Jeffrey Lembrick, Air Vehicle and Systems Management materiel leader with the B-2 Program Office. “Every time we return a jet to the field, it represents an additional strategic option available for the President of the United States.”

“When you talk about aircraft availability, one thing we know is that a jet can’t be used if it’s sitting at PDM,” Lembrick said. “So, completing PDM and returning to the field is a big deal.”

Northrop Grumman manages the recurring maintenance cycle under the direction of the Air Force Life Cycle Management Center’s B-2 Program Office. The standard workload includes detailed inspections, heavy structural repairs, low-observable coating restoration and work on blade seals.

This visit also included replacement of Spirit of Kitty Hawk’s hot trailing edge. The assembly withstands the extreme thermal and acoustic fatigue produced by the bomber’s four engines.

Depot inspections identified several unscheduled maintenance issues that required additional work. The team kept repairs moving by swapping a part with an incoming aircraft and manufacturing another replacement at the facility.

“Depot maintenance is designed to find and fix issues before they ever affect a mission, and this cycle proved how robust our inspection process really is,” said Cindy Conner, Air Vehicle and Systems Management deputy branch chief in the B-2 Program Office. “When we encountered any surprise issues, the PDM team didn’t miss a beat.”

“By executing a strategic part swap with an incoming aircraft and manufacturing an additional replacement part right on-site, they kept the schedule moving and returned a combat-ready aircraft to the fleet,” Conner said. Completion of that work allows the bomber to proceed to its next round of upgrades at Whiteman.

The 509th Bomb Wing can launch B-2 combat sorties directly from Missouri to destinations worldwide. Its operations group also trains all active-duty Air Force and Air National Guard B-2 pilots.