2008 Andersen Air Force Base B-2 accident

The Andersen Air Force Base B‑2 accident was a February 2008 incident when the Spirit of Kansas, a United States Air Force Northrop Grumman B-2 Spirit stealth strategic bomber, crashed on the runway shortly after takeoff from Andersen Air Force Base in Guam.[1] The incident marks the first operational loss of a B‑2 bomber. Both crew members successfully ejected, but the aircraft was destroyed. With an estimated loss of US$1.4 billion, it was the most expensive aircraft crash in history.[2][3]

2008 Andersen Air Force Base B-2 accident
The crashed Spirit of Kansas
Accident
Date23 February 2008
SummaryStall, loss of control
SiteAndersen Air Force Base, Guam
13°35′7.14″N 144°56′12.43″E
Aircraft
Aircraft typeNorthrop Grumman B-2 Spirit
Aircraft nameSpirit of Kansas
OperatorUnited States Air Force
Registration89-0127
Occupants2
Crew2
Fatalities0
Survivors2

Crash

On 23 February 2008, a B‑2 crashed on the runway shortly after takeoff from Andersen Air Force Base in Guam.[1] The crash of the Spirit of Kansas, 89-0127, which had been operated by the 393rd Bomb Squadron, 509th Bomb Wing, Whiteman Air Force Base, Missouri, and which had logged 5,100 flight hours, was the first ever crash of a B‑2.

The two-officer crew attempted to save the bomber, but as one of its wingtips began to "hook" the ground, they ejected from the aircraft and survived the crash. The aircraft was destroyed, a total loss estimated at US$1.4 billion.[4]

According to the Air Force Times, which is a private-industry magazine, no munitions were on board.[5] The Air Combat Command accident board report states that "classified material" had been loaded onto the bomber the morning the aircraft was returning to Whiteman Air Force Base "after a four-month deployment in support of Pacific Air Forces' continuous bomber presence."[6]

At Guam Naval Hospital, one pilot was evaluated and released, and the second was hospitalized. A B‑2 already in the air was called back to Andersen following the crash, where it and the other B‑2s were grounded until an initial investigation into the crash was complete. Six Boeing B‑52s of the 96th Bomb Squadron, 2nd Bomb Wing at Barksdale Air Force Base, Louisiana, were deployed to replace the B‑2s.[1][7]

The commander of the 509th Bomb Wing, Brig. Gen. Garrett Harencak, followed up on the incident by temporarily suspending flying operations for all 20 remaining B‑2s to review procedures. Harencak termed the suspension a "safety pause" and stated that the B‑2s would resume flying if called upon for immediate operations.[8] The B‑2 fleet returned to flight status on 15 April 2008.[9]

Investigation

The findings of the investigation stated that the B‑2 crashed after "heavy, lashing rains" caused moisture to enter skin-flush air-data sensors. The data from the sensors are used to calculate numerous factors including airspeed and altitude. Because three pressure transducers failed to function,[10] not attributable to maintenance error, due to condensation inside devices, the flight-control computers calculated inaccurate aircraft angle of attack and airspeed. Incorrect airspeed data on cockpit displays led to the aircraft rotating at 12 knots slower than indicated. After the wheels lifted from the runway, which caused the flight control system to switch to different control laws, the erroneously sensed negative angle of attack caused the computers to inject a sudden, 1.6‑g, uncommanded 30-degree pitch-up maneuver. The combination of slow lift-off speed and the extreme angle of attack, with attendant drag, resulted in an unrecoverable stall, yaw, and descent. Both crew members successfully ejected from the aircraft soon after the left wing tip started to gouge the ground alongside the runway. The aircraft hit the ground, tumbled, and burned after its fuel ignited.[2][6][11][12]

References
  1. Lavitt, Michael O. "B‑2 Crashes on Takeoff From Guam." Aviation Week, 23 February 2008. Archived 17 January 2012 at the Wayback Machine
  2. "Moisture confused sensors in B‑2 crash", AirForceTimes, 6 June 2008.
  3. Whitaker, Raymond (25 February 2008). "The Most Expensive Air Crash in History". Common Dreams. Retrieved 2 January 2020.
  4. "Air Force: Moisture caused $1.4 billion bomber crash". CNN.com. 6 June 2008. Archived from the original on 10 June 2008. Retrieved 7 June 2008.
  5. "No munitions on board B‑2 that crashed", Air Force Times, 23 February 2008.
  6. Air Combat Command, Accident Investigation Board, "Summary of Facts", "B-2A, S/N 89-0127, 20080223 KSZL501A"; link: AFD-080605-054 Archived 4 March 2016 at the Wayback Machine, hosted by GlenPew.com
  7. "B-2 stealth bomber crashes on Guam". 23 February 2008. Retrieved 22 January 2017.
  8. "B-2 pause", Air Force Times, February 2008.
  9. Linch, Stephen. "B-2s return to flight after safety pause", USAF, 21 April 2008. Archived 17 October 2008 at the Wayback Machine
  11. "Air Force: Sensor moisture caused 1st B-2 crash" , NBC News, 5 June 2008'
  12. Shachtman, Noah (6 June 2008). "Video: Stealth Bomber Crashes". Wired. Archived from the original on 14 October 2008.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.