The Quandary of Aircraft Age vs. Mission Capability Rate

Just a quick graphic to ponder via DefenseNews's 05 AUG 19 edition.

This is USAF focused, and of course there are caveats; FMC vs PMC; maintenance hours per flight hour ... etc - but you would think that newer models would have a higher mission capable rate than models decades older.

Just a few to compare that caught my eye;

- B-52H: 69.3% vs B-2A: 60.7%

- F-16C: 70% vs F-35A: 49.6%

-UH-1N: 81.9% vs HH-60G: 70.7%

Huh.