Hydraulic Failure and Design Flaws Lead to B-2 Spirit Bomber’s Retirement
A B-2 Spirit stealth bomber’s unexpected retirement in 2022 resulted from a series of unfortunate events, including hydraulic system failure and a critical design flaw. An Air Force accident investigation board has unveiled the chain of events that led to the emergency landing at Whiteman Air Force Base in Missouri.
The aircraft, known as the “Spirit of Hawaii,” embarked on its flight from the 509th Bomb Wing at Whiteman AFB on December 10, 2022. As it approached the base later that day, a malfunction in the hydraulic system disrupted the landing gear’s functionality. A valve coupling failure in the right landing gear system precipitated a rapid hydraulic fluid loss, triggering a cascade of issues.
Onboard warning indicators alerted the pilot to the malfunction, prompting the onboard computer to toggle between primary and backup systems in an effort to restore hydraulic pressure. Despite the computer’s attempts, both systems were rapidly losing fluid. The pilot executed an emergency landing gear extension, successfully deploying the right landing gear, and notified the control tower of an in-flight emergency.
As the bomber touched down, the left landing gear failed, unable to maintain its locked position under the aircraft’s weight. The right landing gear lifted into the air, causing the bomber to veer left. The pilot exerted maximum effort on the right brake to stabilize the aircraft, but the left wing dragged across the runway, rupturing a fuel tank and igniting a fire.
The aircraft came to a halt almost a mile from the initial landing gear failure. Fortunately, both pilots remained unharmed and exited the aircraft without the need for ejection. In the ensuing fire response, an incident commander mistakenly chose water over fire suppressant foam, delaying the fire’s containment.
The fire continued to rage until a fuel tank explosion within the left wing allowed firefighters to target the flames directly with water. A second, more powerful explosion followed, scattering debris and narrowly missing firefighters. The fire was eventually extinguished about an hour after the crash.
Investigators identified the hydraulic coupling valve failure as the primary cause of the crash. They also highlighted the B-2’s landing gear design flaw and the delayed use of fire suppressant foam as significant factors exacerbating the incident. The crash inflicted $27,500 in runway damage and over $300 million in damage to the aircraft, leading to its retirement.
The B-2 Spirit, costing approximately $1.2 billion each when introduced in the 1990s, has 19 remaining units in service. The fleet is anticipated to retire in the early 2030s.
