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AFSOC grounds CV22 Osprey
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AFSOC grounds CV22 Osprey
All CV-22 have been grounded indefinitely due to driveline problems.
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Re: AFSOC grounds CV22 Osprey
Wow that is serious
https://www.google.com/amp/s/breakingde ... issue/amp/
Not heard the usual knife flights this afternoon in East Anglia
AFSOC describes the problem as a “hard clutch engagement.” Basically, the clutch inside a gearbox that connects one of the CV-22’s two Rolls-Royce Liberty AE1107C engines to the propeller rotor is slipping for an unknown reason, Heyse said. When that happens, the power load transfers nearly instantaneously to the other engine — a design feature that would allow the Osprey to keep flying even if one engine fails. Then, in most cases, the initial clutch re-engages, and the power load rapidly shifts back to the original propeller rotor and engine.
As a result of the rapid movement of power across engines, however, the aircrew is forced to land the CV-22 immediately, and Heyse added that “if the aircrew were unable to control the aircraft when the incident occurs, it could result in loss of control and uncontrolled landing of the aircraft.”
Heyse said the issue has not caused any injuries or deaths “due in large part to the skill and professionalism of our Air Commandos who operate the CV-22.”
https://www.google.com/amp/s/breakingde ... issue/amp/
Not heard the usual knife flights this afternoon in East Anglia
AFSOC describes the problem as a “hard clutch engagement.” Basically, the clutch inside a gearbox that connects one of the CV-22’s two Rolls-Royce Liberty AE1107C engines to the propeller rotor is slipping for an unknown reason, Heyse said. When that happens, the power load transfers nearly instantaneously to the other engine — a design feature that would allow the Osprey to keep flying even if one engine fails. Then, in most cases, the initial clutch re-engages, and the power load rapidly shifts back to the original propeller rotor and engine.
As a result of the rapid movement of power across engines, however, the aircrew is forced to land the CV-22 immediately, and Heyse added that “if the aircrew were unable to control the aircraft when the incident occurs, it could result in loss of control and uncontrolled landing of the aircraft.”
Heyse said the issue has not caused any injuries or deaths “due in large part to the skill and professionalism of our Air Commandos who operate the CV-22.”
Re: AFSOC grounds CV22 Osprey
Isn't this the same issue that's plagued the Osprey since it was brought in to service?
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Re: AFSOC grounds CV22 Osprey
Japan has decided also to stop flying their Ospreys.
U.S.M.C. however are still flying their MV22’s . They say that the problem is nothing new, they have known about it for years and teach their pilots how to handle the situation!!
U.S.M.C. however are still flying their MV22’s . They say that the problem is nothing new, they have known about it for years and teach their pilots how to handle the situation!!
Re: AFSOC grounds CV22 Osprey
"uncontrolled landing of the aircraft." = crash, most likely killing all onboard, especially if hovering.
Sounds very dangerous, hopefully they can get to the bottom of this quickly!
Sounds very dangerous, hopefully they can get to the bottom of this quickly!
Re: AFSOC grounds CV22 Osprey
Reported 2nd September 2022. CV22's cleared to fly.
https://breakingdefense.com/2022/09/exc ... -shutdown/
https://breakingdefense.com/2022/09/exc ... -shutdown/
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Re: AFSOC grounds CV22 Osprey
From 'Breaking Defense':
Pentagon grounds ‘subset’ of Osprey fleet over safety concerns
WASHINGTON — Months after declaring the V-22 Osprey safe for use, the Pentagon is standing down “a subset” of the fleet over safety concerns that will require the installation of a replacement part.
However, the department is being cagey about exactly how many rotorcraft will be grounded and how long it will take to get them flying again.
The stand down of the multi-mission tiltrotor aircraft used by international allies and three US military services — the Marine Corps, Navy and Air Force — comes months after Air Force Special Operations Command grounded its own Osprey fleet in August following an “increased number of safety incidents” involving an issue with the clutch, as first reported by Breaking Defense. The Air Force later lifted that grounding in early September.
However, investigators have since concluded that when the aircraft reaches a certain number of flight hours, the “input quill assembly” must be replaced in order to continue safely flying the Osprey, a defense official told reporters in a Saturday briefing. The input quill assembly connects the aircraft’s engine to the drive system, and inside of that assembly resides the clutch.
“This recommendation is based on a progressive increase in hard clutch engagements and ongoing engineering analysis,” the official said. “The fleet bulletin identifies aircraft with input quill assemblies above a predetermined flight hour threshold and the requirement to replace that component. Once replaced, aircraft will return to flight status.”
Despite being pressed by multiple reporters, the defense official declined to provide any characterization of how many V-22s have been impacted by the new fleet bulletin, declaring only that it was a “subset” — a wide-open statement that could mean anything from a small handful to a large majority of the rotorcraft are impacted. The official also declined to provide how many flight hours trigger the replacement.
Full story here:
https://breakingdefense.com/2023/02/pen ... -concerns/
Pentagon grounds ‘subset’ of Osprey fleet over safety concerns
WASHINGTON — Months after declaring the V-22 Osprey safe for use, the Pentagon is standing down “a subset” of the fleet over safety concerns that will require the installation of a replacement part.
However, the department is being cagey about exactly how many rotorcraft will be grounded and how long it will take to get them flying again.
The stand down of the multi-mission tiltrotor aircraft used by international allies and three US military services — the Marine Corps, Navy and Air Force — comes months after Air Force Special Operations Command grounded its own Osprey fleet in August following an “increased number of safety incidents” involving an issue with the clutch, as first reported by Breaking Defense. The Air Force later lifted that grounding in early September.
However, investigators have since concluded that when the aircraft reaches a certain number of flight hours, the “input quill assembly” must be replaced in order to continue safely flying the Osprey, a defense official told reporters in a Saturday briefing. The input quill assembly connects the aircraft’s engine to the drive system, and inside of that assembly resides the clutch.
“This recommendation is based on a progressive increase in hard clutch engagements and ongoing engineering analysis,” the official said. “The fleet bulletin identifies aircraft with input quill assemblies above a predetermined flight hour threshold and the requirement to replace that component. Once replaced, aircraft will return to flight status.”
Despite being pressed by multiple reporters, the defense official declined to provide any characterization of how many V-22s have been impacted by the new fleet bulletin, declaring only that it was a “subset” — a wide-open statement that could mean anything from a small handful to a large majority of the rotorcraft are impacted. The official also declined to provide how many flight hours trigger the replacement.
Full story here:
https://breakingdefense.com/2023/02/pen ... -concerns/
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