FAA Orders Inspections for Cracked Helicopter Rotors
Published Date: 4/29/2026
Rule
Summary
If you own or operate an Airbus Helicopters Deutschland MBB-BK 117 D-3, listen up! The FAA found cracks in the rotor hub-shaft after pilots noticed weird vibrations, so they’re requiring inspections and replacements if cracks show up. This rule kicks in May 14, 2026, and could cost some bucks but keeps your helicopter safe and sound.
Analyzed Economic Effects
5 provisions identified: 2 benefits, 3 costs, 0 mixed.
High replacement cost if cracked
If an inspection finds a crack, you must replace the rotor hub-shaft (manufacturer part numbers D623M1501203 and D623M1501204); the FAA estimates replacement costs about $130,808 per helicopter (parts $130,468 plus 4 labor hours = $340). The FAA cannot predict how many of the 78 U.S.-registered helicopters will need replacement.
No special flight permits allowed
The AD states that special flight permits under 14 CFR 21.197 and 21.199 are not allowed for these helicopters. That means operators may not use special flight permits to operate the helicopter under this AD's conditions.
Mandatory hub-shaft inspections
If you own or operate an Airbus Helicopters Deutschland Model MBB-BK 117 D-3 helicopter, you must inspect the rotor hub-shaft for cracks in accordance with EASA Emergency AD 2026-0078-E. This AD is effective May 14, 2026 and requires inspection and replacement if any crack or suspicion of a crack is found.
Mandatory reporting of inspection results
You must report inspection results as required by the incorporated EASA Emergency AD; the FAA estimates reporting takes about 1 work-hour. The FAA lists the Paperwork Reduction Act OMB Control Number 2120-0056 and estimates about 1 hour per response.
Prohibition on installing affected parts
The AD prohibits installing any affected rotor hub-shaft (part numbers D623M1501203 and D623M1501204) on any helicopter unless the installation meets the AD's inspection and other requirements. This prohibition is part of the compliance actions incorporated from EASA Emergency AD 2026-0078-E.
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