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October 16, 2018 | International, Aerospace

Most F-35s return to flight operations after fuel tube problem

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WASHINGTON — After a fuel tube problem sidelined all operational F-35 aircraft last week, more than 80 percent of jets have been cleared to return to flight, the F-35 joint program office stated Monday.

In a Oct. 15 statement, the JPO confirmed that the U.S. services and international partners have completed inspections of their F-35 inventories for faulty fuel tubes. The aircraft that are not impacted by the bad tubes — which are a component in Pratt & Whitney's F135 engine — are back in flying status.

“The F-35 Joint Program Office continues to work closely with the military services to prioritize fuel tube replacements using the current spares inventory,” the JPO said. “Pratt & Whitney is rapidly procuring more parts to minimize the overall repair timeline for the remaining jets. Current inventory will restore about half of the impacted jets to flight operations, and the remaining aircraft are expected to be cleared for flight over the coming weeks.”

Last week, all U.S. and international F-35s were momentarily grounded to allow for an enterprise-wide fuel tube inspection. The review began as a result of an investigation into a Sept. 28 Marine Corps' F-35B crash near Marine Corps Air Station Beaufort in South Carolina — the first F-35 crash in the jet's history.

It is still unclear exactly how the defective fuel tubes impact the jet's performance or how serious a safety threat they pose during flight operations. Joe DellaVedova, a spokesman for the JPO, declined to discuss the specific problems that led the program office to call for a fleetwide inspection, saying that details could not be released until the Marine Corps completes its accident investigation.

Also still up in the air is whether the Pentagon or Pratt & Whitney will be stuck paying the tab for retrofitting the fleet.

Spokesmen from the U.S. Air Force, Marine Corps and Navy declined to lay out exactly how many of their aircraft had been impacted by the faulty fuel tubes. However, as Lockheed Martin delivered its 300th F-35 in June, 20 percent of the operational F-35 fleet can be estimated to be about 60 aircraft across the U.S. and international operators.

The JPO called the fuel tube problem an “isolated incident” that would not impact F-35 deliveries. A total of 91 F-35s are planned to be delivered to the U.S. military and foreign customers this year.

“The primary goal following any mishap is the prevention of future incidents,” the office said. “We will take every measure to ensure safe operations while we deliver, sustain and modernize the F-35 for the warfighter and our defense partners.”

The problem with the defective fuel tubes is the latest in a string of recent supply chain issues that have plagued F-35 prime contractor Lockheed Martin and engine manufacturer Pratt & Whitney, and comes as Defense Secretary Jim Mattis sent a memo directing the Air Force, Marine Corps and Navy to boost the F-35′s mission capable rate to 80 percent.

The Pentagon halted F-35 deliveries in March amid disagreements over whether the department or Lockheed should foot the bill for retrofitting part of the fleet that had not received corrosion-preventing primer in certain fastener holes. Deliveries resumed in May once the parties hammered out an agreement — although it was never revealed to the public exactly how the expenses would be paid off.

In 2016, certain F-35As were grounded after it was found that coolant lines inside the jets' fuel tanks were rimmed with faulty insulation, which was prone to disintegrating.

https://www.defensenews.com/air/2018/10/15/most-f-35s-return-to-flight-operations-after-fuel-tube-problem

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    January 16, 2020 | International, Land

    US Army cancels current effort to replace Bradley vehicle

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Based on feedback and proposals received from industry, we have determined it is necessary to revisit the requirements, acquisition strategy and schedule moving forward,” said Bruce Jette, the Army's acquisition chief. “Since its inception, the OMFV program has represented an innovative approach to Army acquisition by focusing on delivering an essentially new capability to armored brigade combat teams under a significantly reduced timeline compared to traditional acquisition efforts. The Army asked for a great deal of capability on a very aggressive schedule and, despite an unprecedented number of industry days and engagements to include a draft request for proposals over a course of nearly two years, all of which allowed industry to help shape the competition, it is clear a combination of requirements and schedule overwhelmed industry's ability to respond within the Army's timeline,” Jette said. “The need remains clear. OMFV is a critical capability for the Army, and we will be pressing forward after revision." In October, the Army ended up with only one bidder in the OMFV competition — General Dynamics Land Systems. The service had planned to hold a prototyping competition, selecting two winning teams to build prototypes with a downselect to one at the end of an evaluation period. Defense News broke the news that another expected competitor — a Raytheon and Rheinmetall team — had been disqualified from the competition because it had failed to deliver a bid sample to Aberdeen Proving Ground, Maryland, by the deadline. A bellwether for what was to come in the prototyping competition happened earlier in the year when BAE Systems, which manufactures the Bradley, decided not compete, Defense News first reported. And, according to several sources, Hanwha also considered competing but decided against the opportunity. The CEO of BAE Systems' U.S.-based business, Jerry DeMuro, told Defense News in a recent interview that the company didn't regret its decision not to pursue OMFV as the requirements and schedule were previously laid out, but said it continues to talk to the Army about future opportunities. “It was a very challenging program,” DeMuro said. “It always comes down to three things: requirements, schedule and funding. The schedule was very, very aggressive, especially early on, and at the same time trying to get leap-ahead technologies. There's a little bit of dichotomy there. “The requirements that were being asked for was going to require, in our estimation, significantly more development that could not be done in that time frame and significantly more capital than the Army was willing to apply.” Jette said the Army had a large number of vendors interested in the effort, hosted 11 industry days and had a number of draft requests for proposals on the street, but, he said, “it's always a challenge for industry. I was on the outside two years ago, and you get an RFP in after the discussions — it still cannot align with what you thought, and that is what you have to respond to is the RFP.” The acquisition chief believes what happened in this case is there was “a large number interested, they started paring down, which started causing us some uncertainty about the competition, but we still had viable vendors in. And when you get out to actually delivering on those requirements, we had one vendor who had challenges meeting compliance issues with delivery, and the second vendor had difficulty meeting responsive issues, critical issues within the requirement — not knowing how to fulfill that.” When pressed as to whether GDLS met the requirements with its bid sample, the Army's program executive officer for ground combat systems, Brig. Gen. Brian Cummings, who was present at the media roundtable along with the Next-Generation Combat Vehicle Cross-Functional Team leader Brig. Gen. Ross Coffman, said the Army could not discuss results and findings regarding the company's submission. Several sources confirmed a letter was circulating around Capitol Hill from GDLS to the Army secretary that strongly urged the service to continue with the program without delay. So now it's back to the drawing board to ensure the Army gets the prototyping program right. Jette took pains to stress that the OMFV effort is not a failed program with the likes of Comanche, Future Combat Systems, Crusader or the Armed Reconnaissance Helicopter. “This is a continuing program. This is an initial effort at trying to get to a programmatic solution yielded, input that we needed to evaluate, which said we needed to revise our approach, not abandon the program or that it was a failure.” Some major failed programs in the past, Jette noted, were canceled after spending large amounts of money and still moving along even though problems were identified as the service proceeded. Crusader cost about $2 billion, Comanche about $6.9 billion and Future Combat Systems about $19 billion, Jette said. “We've spent a very small amount of money in trying to get to where we are, and in fact a good bit of the technology development that was part of the assessment phase is still totally recoverable," he added. Army Futures Command chief Gen. Mike Murray told the same group of reporters he is hesitant to call OMFV a program because it's a prototyping program, not a program of record. “We are still committed to this. This is like a tactical pause,” he said. The effort so far “gave us a great deal of clarity in understanding what is truly doable,” Jette noted. Army leaders said they would be unable to estimate how long its renewed analysis on the program might take before proceeding with a new solicitation to industry, or what that would mean for the program's schedule in its entirety. The original plan was to field OMFV in 2026. Last month, Congress hacked funding for the OMFV prototyping program, providing $205.6 million in fiscal 2020, a reduction of $172.8 million, which would have made it impossible to conduct a competitive prototyping effort. What happens to that funding or congressional support for the overall program is unclear. While sources confirmed to Defense News in early October that the failure with the OMFV prototyping effort revealed rifts between the acquisition community and the Army's new modernization command, Army Futures Command, Jette said while there is a bit of “scuffing here and there" the two organizations are working together “much better.” Murray added it is his view that the acquisition community and Army Futures Command is moving forward as “one team” with “one goal in mind.” https://www.defensenews.com/land/2020/01/16/army-takes-step-back-on-bradley-replacement-prototyping-effort/

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