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FAASTeam Notice
Type: General Information
Notice Date: Friday, July 21, 2023
Notice Number: NOTC3081
Spot-welded V-band Couplings Cause Accidents; FAA Final Rule issued
This posting will be removed on
Friday, August 7, 2026

On June 12, 2023, the FAA published an Airworthiness Directive (AD) 2023-09-09 for turbocharged, reciprocating engine-powered airplanes and helicopters and turbocharged, reciprocating engines with a spot-welded, multi-segment v-band coupling installed at the tailpipe to the turbocharger exhaust housing flange.  This AD only applies to spot-welded, multi-segment v-band couplings installed at the tailpipe to the turbocharger exhaust housing flange (it does not apply to riveted couplings).  This AD establishes a 500 hour life limit of the v-band coupling and requires repetitive inspections.  The AD contains an optional inspection in paragraph (i)(2) for only the first 2 years after AD publication so owners/operators can re-use their v-band couplings if they pass the AD required inspections, even if the v-band couplings have reached 500 flight hours.

You may view a photo of the affected clamp at:

You may view the Final Rule at:

For questions about the AD you may contact:
     Thomas Teplik, Aviation Safety Engineer
     Central Certification Branch, FAA
     1801 S Airport Road, Wichita, KS 67209
     Phone: (316) 946–4196; email: