FAA Orders Engine Checks to Keep Jets from Peening Out
Published Date: 3/24/2026
Proposed Rule
Summary
The FAA wants to make sure certain Pratt & Whitney engines stay safe by checking and possibly replacing parts with a shot peening problem. If you own or operate PW4074D, PW4077D, PW4084D, PW4090, or PW4090-3 engines, you’ll need to inspect the high-pressure compressor drum rotor disk soon and swap it out if needed. Comments on this plan are open until May 8, 2026, and fixing these issues might cost some time and money but keeps flights safe.
Analyzed Economic Effects
1 provisions identified: 0 benefits, 1 costs, 0 mixed.
Mandatory Inspections and Costly Replacements
If you own or operate Pratt & Whitney PW4074D, PW4077D, PW4084D, PW4090, or PW4090-3 engines, you must visually inspect the high-pressure compressor (HPC) drum rotor disk assembly before it reaches between 8,600 and 10,400 total life cycles since new (as applicable). If incorrect shot peening is found, you must replace the disk before further flight; two specific serial numbers must be removed before 9,800 and 11,000 life cycles. The FAA estimates inspection labor at $850 per engine, replacement parts at $1,622,040 plus $850 labor (total $1,622,890 per engine), and that the rule would affect three engines on U.S. registry (with up to $6,491,560 total cost to U.S. operators).
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Key Dates
Department and Agencies
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