FAA Orders Fuel Tank Fixes for Diamond Aircraft Safety Boost
Published Date: 12/23/2025
Proposed Rule
Summary
If you own or fly a Diamond Aircraft DA 40, DA 40 F, or DA 40 NG, the FAA wants you to update your plane’s fuel tank parts and inspections to keep things safe. This new rule updates previous fixes and adds fresh instructions for the DA 40 NG model. You’ll need to act before February 6, 2026, and while it might cost some money, it’s all about keeping your flight smooth and secure!
Analyzed Economic Effects
1 provisions identified: 0 benefits, 1 costs, 0 mixed.
DA40 fuel-hose replacement and inspections
If you own or operate a Diamond Aircraft Model DA 40, DA 40 F, or DA 40 NG airplane, this proposed rule would require replacing affected fuel tank connection hoses, inspecting the main fuel tank chambers, and removing any detached rubber material. You must do these actions within 100 hours time-in-service or within 2 months, whichever occurs first, after the effective date of the AD; as of the AD effective date, installing an affected part is prohibited. The FAA estimates the rule would affect 987 U.S.-registered airplanes and gives per-airplane cost estimates: inspection $85, removing detached rubber $425, and replacing the hose $1,233 (10 labor hours at $85/hr plus $383 parts).
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