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Cracked Propeller Barrels Required The Air Force To Ground Most C-130 Hs.

Air Mobility Command announced that some C-130s with older propeller models are being grounded. ~ "WASHINGTON — The Air Force has grounded most of its older C-130H Hercules cargo planes and variants due to a problem with their propeller barrels.

Air Mobility Command on Friday confirmed a wide swath of its C-130H fleet, which numbered 128 at the beginning of fiscal 2022, is unable to fly, and it’s unclear how long it will take to replace all the defective propeller assemblies.

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AMC said 116 C-130Hs, including variants of the mobility aircraft, were grounded on Tuesday due to concerns their propeller assemblies are defective, and that inspections over the coming days will show how many of those are affected.

AMC said the groundings are 'widespread' and primarily affect the Air Force Reserve and Air National Guard.

In a statement to Defense News, Air Mobility Command said a maintenance crew at Warner Robins Air Logistics Complex in Georgia found a persistent leak coming from a C-130H propeller while test running the plane’s engine after it had undergone depot maintenance.

That propeller assembly was removed and sent to the complex’s propeller shop, AMC said, where a technician found a crack in its barrel assembly.

AMC ordered immediate field level visual inspections on all C-130Hs with the older 54H60 model propeller, and then conducted metallurgical reviews and stress analyses, the command said. After those reviews, Air Mobility Command issued another order to immediately replace problematic propellers.

The command said newer C-130Js and C-130Hs that have already had their propeller assemblies upgraded with the eight-bladed NP2000 system are not affected by the order." ~

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