Despite OBOGS Failure, Pilot Error Blamed in Fatal F-22 Raptor Crash
December 16, 2011 7:36 AM
comment(s) - last by
Despite bleed air failure and multiple system shutdown, bleed air system not blamed in crash
Now that its investigation is complete, the USAF has come back and handed down its decision on what caused the pilot of an F-22 Raptor to crash his aircraft in November 2010. According to sources and other pilots, the issue that led to the death of Capt. Jeff "Bong" Haney was a malfunction of the Raptor's bleed air intakes.
The report has now been issued and according to the USAF Accident Investigation Board, the cause of the accident was Haney, not the malfunctioning bleed air system in the stricken Raptor. The AIB found that while the bleed air system on the F-22 had failed, Haney didn’t react quickly enough to save the aircraft.
President of the AIB, Brig. Gen. James Browne wrote in the AIB report, "I find the cause of the mishap was the MP's [mishap pilot] failure to recognize and initiate a timely dive recovery due to channelized attention, breakdown of visual scan and unrecognized spatial disorientation."
Fingers were pointed early on at a failure of the On-board Oxygen Generating System or OBOGS as a cause of the accident. The accident report has determined that the OBOGS was functioning and was not a contributing factor to the accident. However, the OBOGS did shut down due to the bleed air problem the F-22 encountered.
The report read, "The MP most likely experienced a sense similar to suffocation." Despite that statement, the report also rules out hypoxia as a contributing factor to the accident. The report continues, "Due to the high affinity of oxygen to hemoglobin, the MP would have had adequate blood oxygen supply after the OBOGS failed. It was concluded that the late recognition of the MA's [mishap aircraft's] unusual attitude and appropriate corrective actions attempted by the MP demonstrates that hypoxia was not a factor in this mishap."
cites a source that claims that Haney would not have succumbed to hypoxia fully, though he would have had symptoms. The source notes that the hypoxia would have been a contributing factor even if the pilot were still conscious. Along with the OBOGS system on the stricken Raptor, the environmental control system, air cycle system, and On-board Inert Gas Generating System as well as cabin pressure were also shut down.
The recovered aircraft memory unit reportedly showed that the "partial pressure to the MP's [mishap pilot] oxygen stopped shortly after 19:42:37 L, which would lead to severely restricted breathing."
Haney was conscious enough to attempt to recover from the steep dive his Raptor was in right before the crash. The F-22 hit the ground three seconds after Haney first attempted to recover. The report notes that for 39 seconds Haney did nothing to address the flight condition of his aircraft.
The report reads, "The fact that the [mishap pilot] went from a controlled flight regime to an unusual attitude and did not take corrective actions for 30 seconds suggests he had unrecognized spatial disorientation. At 19:42:24L the [mishap pilot] recognized the [mishap aircraft's] position and attempted to perform a dive recovery."
This was the second F-22 lost in service since the aircraft went operational. In March of 2009, another
killing the pilot. This accident was a contributing factor to the
Raptor stand down
that lasted months.
This week the
final F-22 Raptor
rolled off the assembly line and will replace the aircraft lost in the fatal crash that took Haney's life.
This article is over a month old, voting and posting comments is disabled
RE: Autopilot ??
12/16/2011 10:55:53 AM
"I'm sorry Dave, I can't do that"
RE: Autopilot ??
12/16/2011 5:16:12 PM
linked for added effects.
"There's no chance that the iPhone is going to get any significant market share. No chance." -- Microsoft CEO Steve Ballmer
F-22 Raptor Production Ends as Final Fighter Rolls Off Production Line
December 14, 2011, 4:04 PM
Options to be Offered to USAF Chief on Lifting F-22 Stand Down
September 9, 2011, 1:05 PM
Air Force F-22A Raptor Crashes During Flight Testing
March 26, 2009, 11:37 AM
Creationists are Mad About Google Doodle Depicting Evolution
November 24, 2015, 8:48 PM
DHS and TSA: Whoops, We Missed That 73 Airport Employees May be Terrorists
November 19, 2015, 2:16 PM
Star Wars Spinoff Film "Rogue One", Theme Park Attractions Announced
August 17, 2015, 12:20 PM
SpaceX Falcon 9's Seventh Supply Mission to ISS Ends w/ Fiery Stage 1 Explosion
June 28, 2015, 1:10 PM
Cool Science Video: Glowing Millipede Prowls the Nevada Desert
May 18, 2015, 12:00 PM
Newly Discovered Costa Rican Glass Frog is Kermit's Doppelgänger
April 22, 2015, 11:26 AM
Latest Blog Posts
Sceptre Airs 27", 120 Hz. 1080p Monitor/HDTV w/ 5 ms Response Time for $220
Dec 3, 2014, 10:32 PM
Costco Gives Employees Thanksgiving Off; Wal-Mart Leads "Black Thursday" Charge
Oct 29, 2014, 9:57 PM
"Bear Selfies" Fad Could Turn Deadly, Warn Nevada Wildlife Officials
Oct 28, 2014, 12:00 PM
The Surface Mini That Was Never Released Gets "Hands On" Treatment
Sep 26, 2014, 8:22 AM
ISIS Imposes Ban on Teaching Evolution in Iraq
Sep 17, 2014, 5:22 PM
More Blog Posts
Copyright 2016 DailyTech LLC. -
Terms, Conditions & Privacy Information