Cracked Engine Heads? FAA Orders Inspections for Continental Engines
Published Date: 10/15/2025
Rule
Summary
If you own or operate a Continental Aerospace Technologies TAE 125-02-125 engine, listen up! The FAA found cracks in the cylinder heads that can cause coolant leaks and engine trouble. Starting October 30, 2025, you’ll need to inspect your engine’s coolant and possibly replace the coolant and cylinder heads to keep flying safe and sound.
Analyzed Economic Effects
5 provisions identified: 0 benefits, 5 costs, 0 mixed.
Required cylinder-head replacement for certain contamination
If the coolant sample has aluminum or fluoride above the service bulletin limits, you must remove and replace the cylinder head with a serviceable part, flush the cooling system, and refill before further flight. The FAA estimated the on-condition cost to replace a cylinder head at $11,360 per engine (parts $10,000 plus 16 work-hours at $85/hour = $1,360).
Mandatory one-time coolant inspection
If you own or operate a Continental TAE 125-02-125 engine, you must do a one-time inspection (sample and analysis) of the engine coolant. For engines with 50 or more flight hours since the last coolant replacement (or since new) as of October 30, 2025, do the inspection within 5 flight hours after October 30, 2025. For engines with less than 50 flight hours since the last coolant replacement, do the inspection within 5 flight hours after you reach 50 flight hours.
Flush and refill required for other coolant contamination
If the coolant sample exceeds any acceptable range other than aluminum or fluoride, you must drain and flush the engine cooling system and refill it with new coolant before further flight. The FAA estimated the on-condition cost for drain/flush and refill at $360 per engine (4 work-hours at $85/hour plus parts).
Ban on installing non-serviceable cylinder heads
After October 30, 2025, you may not install a cylinder head on any engine unless it is a "serviceable part," defined as new (never installed) or not removed under the AD's removal rule. This prohibits installing certain used or previously removed cylinder heads.
Estimated national compliance scope and inspection cost
The FAA estimates this AD affects 30 engines on U.S.-registered airplanes and estimates the coolant inspection cost at $170 per engine (2 work-hours at $85/hour). The total estimated cost to U.S. operators for the inspection step is $5,100.
Your PRIA Score
Personalized for You
How does this regulation affect your finances?
Sign up for a PRIA Policy Scan to see your personalized alignment score for this federal register document and every other regulation we track. We analyze your financial profile against policy provisions to show you exactly what matters to your wallet.
Key Dates
Department and Agencies
Related Federal Register Documents
2026-13440 — Enabling Supersonic Overland Flight
The FAA wants to let supersonic planes fly over land again by updating old rules that banned them because of loud sonic booms. Thanks to new tech that keeps booms quiet, this change will open the door for faster, cooler flights across the U.S., helping America lead the world in supersonic travel. People and companies interested in supersonic flight should share their thoughts by August 17, 2026.
2026-13126 — Designation-Restrict the Operation of Unmanned Aircraft in Close Proximity to a Fixed Site Facility; Extension of Comment Period
The FAA is giving more time—until August 5, 2026—for people to share their thoughts on new rules that would limit drone flights near important fixed sites like power plants or airports. This affects drone operators and facility owners who want to keep the skies safe and secure. No new costs yet, just extra time to weigh in and help shape the rules.
2026-08943 — Designation-Restrict the Operation of Unmanned Aircraft in Close Proximity to a Fixed Site Facility
The FAA is proposing new rules to keep drones away from certain important fixed sites like power plants or airports to keep everyone safe and secure. If you own or operate one of these sites, you can request a drone flight restriction zone to protect your property and people nearby. Comments are open until July 6, 2026, and these changes could affect drone pilots and site operators, but no big costs are expected.
2026-13685 — Airworthiness Directives; Bell Textron Canada Limited Helicopters
If you fly or maintain Bell Model 430 helicopters, listen up! The FAA updated safety rules to change how long certain rotor parts can be used and how pitch link assemblies are labeled. These new rules kick in on August 11, 2026, and might mean some extra checks or part swaps to keep your chopper safe and sound.
2026-13655 — Airworthiness Directives; Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Airplanes
The FAA just made new rules for all Airbus Canada BD-500-1A10 and BD-500-1A11 airplanes because some important clips in the high pressure valve were missing or broken. These rules stop planes from flying if certain safety systems aren’t working right or if warning messages show up. The rules started July 7, 2026, and operators need to follow them to keep flights safe without extra costs right now.
2026-13541 — Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Engines
If you operate certain Rolls-Royce Deutschland BR700 engines, the FAA wants you to update your maintenance plans with new, stricter rules to keep parts safe and sound. This means checking and replacing some engine parts sooner than before to avoid problems. Comments on these changes are open until August 20, 2026, so get ready to adjust your schedules and budgets!
Previous / Next Documents
Previous: 2025-19554 — Airworthiness Directives; Airbus Helicopters
If you own or fly an Airbus H160-B helicopter, listen up! The FAA found some broken parts in the main gearbox supports and now requires regular checks for cracks and fixes if needed. Starting October 30, 2025, you can’t install certain parts unless they meet new safety rules—so get ready to inspect, fix, and keep flying safe without breaking the bank.
Next: 2025-19556 — Airworthiness Directives; Airbus SAS Airplanes
The FAA is making a new rule for certain Airbus A330 and A320 series airplanes because pilots noticed the engines sometimes act funny during descent with the autopilot throttle on. To fix this, airlines must update the flight computer settings by October 30, 2025. This change keeps flights safer and might cost some time and money to update, but it’s worth it to avoid engine trouble.