champi escribió:Esta noticia sobre una OTI ("one-time inspection") nos deja un dato interesante. Al menos hacen falta 36 horas para sacar un motor de un F-35:
https://www.af.mil/News/Article-Display ... ht-spaces/By Staff Sgt. Peter Thompson, 33rd Fighter Wing / Published January 03, 2019
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The current guidelines used for aircraft maintenance required that the entire engine be removed,
which would require at least 36 hours per jet. Furthermore, engine trailers and tool boxes would need to be transported to the location, extending the timeline.
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Por poner en perspectiva toda la noticia...
En resumen, necesitaban cambiar el sistema de combustible por lo que tenían que sacar el motor, pero no tenían las herramientas adecuadas ni el personal necesario, por lo que completar el sacar el motor lles llevó la tira de tiempo.
"EGLIN AIR FORCE BASE, Fla. (AFNS) -- As Hurricane Michael churned toward the Emerald Coast of Florida, F-35A Lightning IIs from the 33rd Fighter Wing evacuated to Barksdale Air Force Base, Louisiana, to avoid the storm’s path and potential catastrophic damage. As Michael passed, narrowly missing Eglin AFB, a different type of storm brewed on the horizon that would test nomad innovation.
There was talk within the F-35 community of a one-time inspection, or OTI, order being passed down.
Every aircraft at the 33rd FW needed to have a fuel line on the engine inspected. Parts within a specific batch number needed to be removed and replaced. All of the wing’s aircraft were grounded until they were inspected and fixed if needed.
This had a profound impact back at Eglin AFB but brought even more complications for the aircraft still at Barksdale AFB.
“It was particularly worrisome for us because we had jets off station without access to all of our tools and personnel,” said 1st Lt. Patrick Michael, 58th Aircraft Maintenance Unit assistant officer in charge. “We didn’t have the guidance for changing out the part yet. The preliminary guidance said we would need to remove the engine to access and remove the line.”
The current guidelines used for aircraft maintenance required that the entire engine be removed, which would require at least 36 hours per jet. Furthermore, engine trailers and tool boxes would need to be transported to the location, extending the timeline.
When the OTI was made official on Oct. 12, leadership at all levels of the 33rd Maintenance Group and 33rd Aircraft Maintenance Squadron saw an opportunity for Airmen to demonstrate how capable they are. They extended a challenge…find a better way.
The maintainers at Barksdale AFB determined eight of the jets failed the requirements of the OTI. The remaining jets returned to Eglin AFB. Maintainers working with field support engineers from Lockheed Martin and Pratt and Whitney set out to find a way to replace the fuel line without removing the engine.
Crew chiefs determined they could access the part through a hole just big enough to fit a hand. The location of the fuel line is nearly impossible to see. They needed to detach and set aside another component without removing it, making room even scarcer.
Despite how difficult it was, they succeeded in finding the fix. The first across the F-35’s global presence.
Within three days of the official notification, the 58th AMU had identified the jets that were deficient, found the fix, got it reviewed and approved to execute and were on their way to Barksdale AFB to implement the new procedure......."