FAA Proposes Sealant Checks for Boeing 787 Dreamliners
Published Date: 2/24/2026
Proposed Rule
Summary
The FAA wants Boeing 787-8, 787-9, and 787-10 airplanes checked because some sealant in their wing fuel tanks might not have been inspected properly during production. They’re proposing detailed inspections and tests to make sure everything sticks tight and safe. If you own or operate these planes, get ready for these checks soon—comments on the plan are open until April 10, 2026, and fixing issues could cost some time and money.
Analyzed Economic Effects
5 provisions identified: 2 benefits, 3 costs, 0 mixed.
Mandatory 787 sealant inspections
If you own or operate Boeing Model 787-8, 787-9, or 787-10 airplanes, the FAA would require a detailed inspection of certain sealant installations in the left, right, and center wing side-of-body areas and an adhesion test of that sealant, and you must perform any on-condition repairs per Boeing Alert Requirements Bulletin B787-81205-SB570053-00 RB, Issue 001, dated November 5, 2025.
Estimated inspection cost per aircraft
The FAA estimates the inspection and adhesion test will take 34 work-hours at $85 per hour (labor cost $2,890) with $0 parts cost, so cost per airplane is $2,890 and the FAA estimates the AD would affect 60 U.S.-registered airplanes for a total estimated cost to U.S. operators of $173,400.
Safety goal: prevent fuel tank ignition
The FAA says the inspections are needed because missing visual and adhesion inspections during production could leave sealant defects that might create an ignition source inside the center wing fuel tank and increase the risk of a fuel tank explosion during a lightning strike; the AD is intended to address that unsafe condition.
On-condition repair costs uncertain
The FAA states it has received no definitive data to estimate costs for any on-condition repairs that may be required after the inspection, so affected operators may incur additional repair expenses beyond the $2,890 inspection estimate.
Possible warranty coverage reduces operator cost
Boeing states some or all costs of the proposed AD may be covered under warranty, which could reduce the out-of-pocket cost for affected operators.
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Key Dates
Department and Agencies
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