In October 2019, on Seymour Johnson Air Force Base, North Carolina, the 916th Maintenance Squadron (of the 916th Air Refueling Wing) completed their last isochronal (ISO) inspection of a KC-135 Stratotanker.

The KC-135 has been replaced by the KC-46 Pegasus.

The last ISO on the 916th KC-135 was started in August, but took longer than expected due to delays caused by severe weather: “The ISO (isochronal) aircraft was placed on the flightline as a precaution to protect it from possible damage. The hangar it was in leaves the empennage exposed to high winds which could cause more damage because of the close tolerance to the hangar doors.”-Senior Master Sergeant Karl Rehkamp, 916th Maintenance Squadron maintenance flight chief

Explainer video report, by Technical Sergeant Michael McGhee:

KC-135:  BATS & BEARS, OH MY!