After halting F-22 flights, US Air Force examines other jets for oxygen faults
Written by defenceWeb, Tuesday, 10 May 2011
A deadly F-22 crash on November 16 last year prompted the Air Force to begin investigating the On-Board Oxygen Generation Systems (OBOGS) aboard the F-22, F-35 Lightning II Joint Strike Fighter (JSF) and other tactical aircraft and trainers. The service last week stood down all F-22s after a spike in incidents potentially related to hypoxia.
"No other airframes have been stood down due to this investigation; however, a parallel investigation is taking place on the on-board oxygen generation systems on the A-10, F-15E, F-16, F-35 and T-6 aircraft," said Captain Jennifer Ferrau, an Air Force spokeswoman for Air Combat Command (ACC).
Since January, Raptors have been kept at altitudes below 25 000 feet during the ongoing investigation in order to lessen the risk in case their oxygen systems malfunctioned. If the OBOGS failed at 25 000 feet pilots would have time to recover to lower altitudes where there is enough oxygen in the atmosphere. This is not the case when the aircraft flies at its 50 000 feet ceiling, as the pilot would only have ten seconds of consciousness.
As the Air Force could not say when the F-22 would be flying again, the entire fleet is standing down indefinitely.
"We are still working to pinpoint the exact nature of the problem. It is premature to definitively link the current issues to the OBOGS system," Ferrau said. "The safety of our airmen is paramount and we will take the necessary time to ensure we perform a thorough investigation."
There have been nine suspected cases of hypoxia during F-22 operations since mid-2008, and recently there have been 14 recorded OBOGS incidents.
"Over the last week, we have experienced five additional F-22 'Physiological-Hypoxia Like' events across the Air Force, which led Commander of Air Combat Command to establish the current F-22 stand-down," Ferrau said. Ferrau reports "increased frequency of pilot reported physiological incidents such as hypoxia and decompression sickness."
F-22 manufacturer Lockheed Martin has deployed a team to assist the Air Force during its OBOGS investigation, according to company spokesperson Stephanie Stinn.
Skynet 5A satellite starts move eastwards
by AIRBUS Defence & Space, 28 July 2015
The relocation will extend the Skynet constellation coverage and services, providing near-global military X-band and UHF coverage.
Strong order book, growing profit, diversified product offering confirm Denel as Africa's hi-tech powerhouse
by Denel Corporate, 24 July 2015
The company has an order book of over R35 billion, triple the value of secured orders of a few years ago, and a six-fold annual revenue cover.
Southern African Shipyards leads cost management in African shipbuilding
by 6Sigma Naval Architects, 22 July 2015The company is taking part in two tenders for the South African Navy, and has selected the CostFact system to cover its calculation demands.
Paramount Group supports orphanage, homeless shelter for Mandela Day
by Paramount Group, 21 July 2015The Paramount team assisted the Thusong Children's Orphanage and the MES Kempton City Homeless Shelter.
Denel dogs to sniff out rhino poachers in Kruger
by Denel Corporate, 16 July 2015
Specially trained dogs will be deployed in the nature reserve for the next 18 months, in terms of an agreement between Denel and SANParks.
Denel to offer wide-ranging products to African defence leaders
by Denel Corporate, 6 July 2015
It will exhibit these at the Land Forces Africa conference at the Heartfelt Arena in Thaba-Tshwane today and tomorrow.