Turbocharging - Exhaust Tailpipe V-Band Coupling (Clamp) - Life Limit / Inspection
- Published
- Effective
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators and maintenance organizations should use V-band coupling part number S1921-1 as approved when replacing exhaust tailpipe V-band couplings on affected aircraft, applying the specified torque values based on the coupling manufacturer. They must continue to comply with the 500-hour repetitive replacement and inspection intervals mandated by AD 2018-06-11. Before using this AMOC, notify the appropriate FAA principal inspector or local flight standards district office and document the AMOC usage in aircraft records.
Summary
The document titled 'Turbocharging - Exhaust Tailpipe V-Band Coupling (Clamp) - Life Limit / Inspection' is an FAA approval letter granting a Global Alternate Method of Compliance (AMOC) for Airworthiness Directive 2018-06-11. It affects Textron Aviation models A36TC, B36TC, S35, V35, V35A, and V35B airplanes equipped with specific Continental TSI0-520-D engines and turbochargers. The AMOC addresses replacement and inspection procedures for the exhaust tailpipe V-band coupling part number S1921-1 as an acceptable substitute for certain original part numbers.
What changed
This document approves the use of V-band coupling part number S1921-1 as an acceptable replacement for previous part numbers N4211-375-M, U4211-375-M, and 4404C375-M on specified aircraft models. It also specifies adjusted torque values for installation depending on the coupling manufacturer and clarifies inspection and replacement requirements remain in effect. The AMOC excludes aircraft equipped with StandardAero STC SA 1035WE.
Why it matters
This approval provides operators and maintenance personnel with an authorized alternative part and installation procedure, potentially improving parts availability and maintenance efficiency. It ensures continued airworthiness by maintaining required inspection and replacement intervals while accommodating the new coupling part. Compliance teams must understand the torque adjustments and inspection criteria to meet FAA requirements.
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