Every number on this page was verified against the cited source before publication, and each entry links to that source. Where a figure has a common misquoted version, we note the difference. No statistic here is estimated, rounded beyond its source, or reconstructed from memory.
Headline numbers. Boeing forecasts 728,000 new maintenance technicians needed worldwide through 2045. ATEC projects a 10 percent certificated mechanic shortage for 2025. US training spend reached 102.8 billion dollars in 2025. Non-compliance costs organizations 2.71 times more than compliance. And without reinforcement, memory savings fall to about 21 percent within a month of learning.
Aerospace workforce and the technician shortage
1. 728,000
New maintenance technicians Boeing forecasts the global commercial fleet will need from 2026 to 2045, alongside 674,000 new pilots and 1,023,000 new cabin crew members.
2. 9,000+
New FAA mechanic certificates issued in 2024, about 4 percent below the record 9,401 issued in 2023.
Source: ATEC, 2025 Pipeline Report
3. 10%
Projected shortage of certificated mechanics for 2025, narrowing to 7 percent by 2035, which still leaves the industry roughly 10,000 certificated mechanics short.
Source: ATEC, 2025 Pipeline Report
4. 1 in 3
Share of available A&P school seats that remain unfilled, even with aviation maintenance school enrollment up 9 percent year over year.
Source: ATEC, 2025 Pipeline Report
5. 431,000+
Personnel in the US civil aviation maintenance workforce. Two thirds of new mechanics certify through A&P schools, 14 percent through military experience, and 20 percent through work experience.
Source: ATEC, 2025 Pipeline Report
6. 35%
Share of current FAA-certified aviation maintenance technicians over age 62. ATEC estimates 123,000 new mechanics and avionics specialists must enter the field over the next 20 years.
7. 43,000
Oliver Wyman's likely-scenario estimate of the US aviation maintenance worker shortfall by 2027, about 24 percent of demand, up from an estimated 12,000 to 18,000 shortfall in 2023.
8. 19%
Expected US certified-mechanic shortfall by 2028, in a global MRO market that passed 114 billion dollars in 2024 and is projected to reach 156 billion dollars by 2035.
Source: Oliver Wyman, MRO Survey 2025
9. $79,140
Median annual pay for US aircraft and avionics equipment mechanics and technicians in May 2024, across 160,800 jobs, with 5 percent projected employment growth from 2024 to 2034 and about 13,100 openings per year.
Source: US Bureau of Labor Statistics, Occupational Outlook Handbook
10. ~15%
Aerospace and defense industry attrition in 2024, in a US A&D workforce that reached 2.23 million people, up 2.9 percent from 2023, while the sector generated 995 billion dollars in revenue.
Training spend and practice
11. $102.8B
US training expenditures in 2025, up 4.9 percent year over year. Training payroll rose about 7 percent to 64.7 billion dollars, and spending on outside products and services jumped 29 percent to 16 billion dollars.
12. $874
Average organizational spend per learner in 2025, up from 774 dollars in 2024, while average training hours per employee fell from 47 to 40.
13. $1,054
Average direct learning expenditure per employee in 2024. Employees used an average of 13.7 formal learning hours, down from 17.4 in 2023, while organizations invested 2.9 percent of revenue in learning, the highest ratio in five years.
Source: ATD, 2025 State of the Industry
14. 91%
L&D professionals who agree continuous learning is more important than ever for career success. 49 percent say executives worry employees lack the skills to execute business strategy.
15. 88%
Organizations concerned about employee retention, with providing learning opportunities ranked the top retention strategy. Only 15 percent of employees say their manager helped them build a career plan in the past six months.
Compliance cost and risk
16. 2.71x
How much more non-compliance costs than compliance: an average of 14.82 million dollars per year for non-compliance versus 5.47 million dollars for compliance, with non-compliance costs up 45 percent from 2011 to 2017.
Source: Ponemon Institute and Globalscape, The True Cost of Compliance (2017)
17. 45%
Compliance practitioners who did not monitor their cost of compliance across their organizations, in a survey of more than 350 practitioners. One third expected their compliance teams to grow.
18. $75,000
Maximum FAA civil penalty per violation for entities other than individuals or small businesses, for violations on or after December 30, 2024. Individuals and small businesses face up to 17,062 dollars per violation.
Source: 14 CFR 13.301, current eCFR text
19. $102,348
Maximum FAA civil penalty per hazardous materials violation, rising to 238,809 dollars when a violation results in death, serious illness, severe injury, or substantial property destruction. Hazmat training violations carry a 617 dollar minimum per violation.
Source: 14 CFR 13.301, current eCFR text
Knowledge retention and learning science
20. ~21%
Memory savings after 31 days in the modern replication of Ebbinghaus's forgetting curve: roughly 58 percent at 20 minutes, 44 percent after 1 hour, about 33 percent after 1 day, and about 21 percent after a month. These are savings-on-relearning scores, the study's measure of retention, not a literal percent remembered.
Source: Murre and Dros, PLOS ONE (2015)
21. 47.3% vs 36.7%
Final-test recall with spaced practice versus massed practice, across 254 studies and 14,811 participants. The meta-analysis also found the optimal spacing interval grows as the retention interval grows.
22. d = -1.4
Effect size of skill decay after more than 365 days without practice, versus effectively zero loss immediately after training, across 189 data points from 53 articles. Cognitive, accuracy-based tasks decay faster than physical, speed-based ones.
These three findings are the research base behind spaced reinforcement: tracking decay after training ends and re-verifying on a cadence, rather than assuming a completion in January still means competence in October.
Maintenance human factors and safety
23. 20-30%
Share of serious aviation incidents that some estimates place maintenance errors as the root cause of, per the FAA's Human Factors Guide for Aviation Maintenance and Inspection.
Source: FAA, Human Factors Guide for Aviation Maintenance and Inspection
24. 80%
Share of all events attributed to human error, with the majority of those errors stemming from latent organizational weaknesses.
25. 5 hours
Typical sleep maintainers were getting across multiple organizations, per FAA fatigue research. After 16 hours awake, task performance degrades to a level consistent with a 0.05 percent blood alcohol concentration, and after 24 hours to roughly 0.10 percent. Work-related injury risk runs about 15 percent higher on afternoon shifts and 28 percent higher on night shifts than on mornings.
Why these numbers matter together
Read as one picture: the aerospace workforce is aging out faster than it is being replaced, training budgets are large and growing, regulators price non-compliance in six-figure per-violation penalties, and the learning science says untended knowledge decays within weeks. That combination is why AS9100 and FAA Part 145 both converge on the same demand: not proof that training was delivered, but evidence that it worked.
Citing these statistics? Please link the original source listed under each entry rather than this page.
Frequently asked questions
Boeing's Pilot and Technician Outlook 2026-2045 forecasts 728,000 new maintenance technicians will be needed worldwide over 20 years. For the US specifically, ATEC estimates 123,000 new mechanics and avionics specialists must enter the field over the next 20 years.
ATEC's 2025 Pipeline Report projects a 10 percent shortage of certificated mechanics for 2025, narrowing to 7 percent by 2035, still about 10,000 mechanics short. Oliver Wyman's 2025 MRO Survey expects the US certified-mechanic shortfall to reach 19 percent by 2028.
US training expenditures reached 102.8 billion dollars in 2025 per Training Magazine's Training Industry Report, averaging 874 dollars per learner. ATD's 2025 State of the Industry reports average direct learning expenditure of 1,054 dollars per employee for 2024.
The 2015 replication of Ebbinghaus's forgetting curve (Murre and Dros, PLOS ONE) found memory savings fall to about 33 percent after one day and about 21 percent after a month without reinforcement. Spaced practice counteracts this: a meta-analysis of 254 studies found 47.3 percent recall with spaced practice versus 36.7 percent with massed practice.