FAA Orders Boeing 737 Crack Checks to Keep Planes Aloft
Published Date: 5/13/2026
Rule
Summary
The FAA is requiring certain Boeing 737 airplanes (models 100 through 500 series) to get regular checks for cracks and corrosion near the aft drain mast because some cracks were found there. These inspections start June 17, 2026, and if problems are found, repairs must be done to keep the planes safe. This means airlines will need to spend time and money on these important safety checks to keep flying smoothly.
Analyzed Economic Effects
2 provisions identified: 0 benefits, 2 costs, 0 mixed.
Mandatory inspections for older Boeing 737s
Starting June 17, 2026, certain Boeing Model 737-100, -200, -200C, -300, -400, and -500 airplanes must have repetitive inspections of the fuselage skin and structure under the aft drain mast for cracks or corrosion. The AD applies to airplanes identified in Boeing Alert Service Bulletin 737-53A1409, Revision 1 (dated October 27, 2023); Group 1 airplanes must be inspected within 120 days after June 17, 2026, and Group 2 airplanes must follow the times in the service bulletin.
Inspection cost estimate and unknown repair costs
The FAA estimates inspections will take 7 work-hours at $85 per hour, costing $595 per inspection cycle per airplane. The FAA estimates the AD affects 123 U.S.-registered airplanes, for a combined estimated cost of $73,185 per inspection cycle on U.S. operators; the FAA has not provided cost estimates for any on-condition repair actions if cracks or corrosion are found.
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