Fancy Private Jets Have Hoses That Rub Wrong Way
Published Date: 1/6/2025
Proposed Rule
Summary
The FAA wants Bombardier BD-700-1A10 and BD-700-1A11 airplane owners to check certain engine pump hoses for wear and damage because they might rub against parts and cause problems. If any issues are found, fixes must be made to keep the planes safe. Comments on this plan are open until February 20, 2025, and the inspections could cost some time and money but will keep flights safer.
Analyzed Economic Effects
3 provisions identified: 1 benefits, 2 costs, 0 mixed.
Reduces risk of hydraulic failure
The AD is intended to find and fix chafing or inadequate clearance of engine-driven pump hydraulic pressure hoses to prevent hydraulic leaks and failures. By requiring inspection and corrective action, the rule aims to reduce the risk of losing hydraulic systems number 1 and 2, which would substantially reduce the airplane's functional capabilities.
Estimated inspection and repair costs
The FAA estimates this proposed AD affects 36 U.S.-registered airplanes. The estimated cost for the required inspection is $170 per airplane (2 work-hours at $85/hour), for a total of $6,120 across the U.S. fleet; if on-condition repairs are needed, the FAA estimates up to $1,396 per airplane (2 work-hours plus $1,226 parts).
Mandatory hose inspections within 500 hours
If you own or operate a Bombardier BD-700-1A10 or BD-700-1A11 airplane (S/Ns 60001–60076, 60083, 60087, 60089), you must do a borescope inspection of specified engine-driven pump hydraulic pressure hoses within 500 flight hours or 18 months after the AD's effective date. The inspection checks for damage and that there is at least 0.500 inch (12.70 mm) clearance; if clearance is below 0.500 inch or any damage is found, the AD requires corrective actions before further flight.
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