FAA Mandates Engine Blade Swaps for Safety
Published Date: 8/20/2026
Rule
Summary
The FAA is requiring certain International Aero Engines AG models to replace some 3rd stage high pressure compressor blades because they can wear out and break, which is unsafe. This rule starts on September 24, 2026, and affects airlines using these engines. Fixing this might cost some money but keeps flights safe and sound.
Analyzed Economic Effects
4 provisions identified: 2 benefits, 2 costs, 0 mixed.
Per-Engine and National Compliance Costs
The FAA estimates replacing a full set of 3rd stage HPC rotor blades with reworked blades costs $30,085 per engine (1 work-hour at $85 plus $30,000 parts). The AD affects 1,462 engines on U.S. registry for a total estimated cost of $43,984,270; if blades cannot be reworked, a full set of new blades is estimated at $225,000 per engine.
Estimated Impact on Small U.S. Carriers
The FAA analyzed small entities and estimated low‑case and high‑case average compliance costs by industry. For example, for Scheduled Passenger Air Transportation the FAA lists an average low‑case cost of $481,360 and a high‑case cost of $3,600,000 per small entity; for Other Aircraft Parts and Auxiliary Equipment Manufacturing the FAA lists $60,170 low‑case and $450,000 high‑case. The FAA estimated 8 small entities are affected.
Mandatory Blade Replacement at Shop Visit
If your aircraft uses certain International Aero Engines AG models with 3rd stage HPC rotor blades P/N 6A8353 or 6A8688, you must replace the full set of those blades at the next engine shop visit after September 24, 2026. The replacement must use parts eligible for installation (P/N 6C8368, 6C8403 or later approved P/N, or blades modified to P/N 6A8353-001 or 6A8688-001). This AD is intended to prevent blade failure that has caused engine fires, aborted takeoffs, unplanned removals, and in‑flight shutdowns.
Options to Request Compliance Extensions (AMOCs)
Operators may request an alternative method of compliance (AMOC) under 14 CFR 39.19 from the Manager, AIR-520 Continued Operational Safety Branch, FAA; requests must follow the procedures in 14 CFR 39.19. The AD also permits requests to extend the compliance time if parts are not available, based on a showing that safety is not adversely affected.
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