FAA Orders Extra Wing Checks on Textron Planes
Published Date: 7/24/2026
Rule
Summary
If you own a Textron B300 or B300C airplane, listen up! The FAA says you need to update your maintenance manuals to check the wings more often for cracks. This rule kicks in on August 10, 2026, so get ready to keep your plane safe without breaking the bank.
Analyzed Economic Effects
4 provisions identified: 0 benefits, 4 costs, 0 mixed.
New scheduled replacement intervals for wing items
The AD incorporates specific scheduled replacement intervals for wing-related components for 16,500 MTOW airplanes: certain Wing-to-Fuselage attach angles must be replaced every 2,500 hours for specified early serial ranges, other attach angles every 29,200 hours for later serial ranges, and the Outboard Wing Structure for specified serial ranges must be replaced every 6,500 hours unless certain spar caps are installed. The AD also states there are no life-limitation inspection tasks for the wing center section or outboard wing structure for later serials provided listed inspection programs and replacement schedules have been followed.
You must revise maintenance manuals
If you own or operate a Textron Model B300 or B300C airplane identified in Textron Mandatory Service Letter MTL-57-04, Revision 1 (dated March 27, 2025), you must revise the Airworthiness Limitations section of your aircraft maintenance manual (AMM) or instructions for continued airworthiness and your approved maintenance/inspection program to incorporate the new wing inspection actions and intervals. This AD is effective August 10, 2026. The FAA estimates the revision takes 1 work-hour at $85 per airplane and that 113 U.S. airplanes are affected (aggregate $9,605).
Short compliance deadlines tied to flight hours
For airplanes certified to or operating at 16,500 lb MTOW, you must comply on the following schedule after this AD becomes effective August 10, 2026: if the airplane has 3,800 hours TTIS or less—before reaching 3,800 hours TTIS or within 25 hours TIS or 30 days after the effective date, whichever occurs later; if 3,801–7,400 hours TTIS—within 200 hours TIS or 6 months after the effective date, whichever occurs first; if more than 7,401 hours TTIS—within 25 hours TIS or 30 days after the effective date, whichever occurs first.
Applies only to specific B300/B300C serials; some exceptions
This AD applies to Textron Model B300 and B300C airplanes identified in Textron Mandatory Service Letter MTL-57-04, Revision 1, and includes specific serial-number ranges listed in the rule (for example certain FL and FM serial numbers noted in paragraphs (c)(1)–(3)). Airplanes that have had a wing evaluation by Textron Aviation Special Missions and been issued serial-number specific aircraft limitations and SIRM supplements are excluded.
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