
Reading page two of the report ... it looks like they did NOT cherry-pick the worst of the data. But instead, they picked some aircraft types via a criteria and then discovered that the readiness rates are in the decline for EVERY SINGLE type they looked at. https://www.gao.gov/assets/gao-22-104533.pdf
Interestingly ... maintenece positions are staffed at about maybe 95% levels for these aircraft. (See page 16)
Worst thing I read ... the USAF and USN keeps track of long-term-grounded aircraft, and judges maintenece units on that number. Therefore units will rotate parts among aircraft such that the total number of aircraft working is fixed, but fewer aircraft are long-term-grounded. It's extra work for no benefit.(Page 15)
Parts shortages have somewhat gotten worse (Page 23)
Aircraft utilization was about the same or maybe down (depends on the particular aircraft) (Page 30)