For determining the maximum permissible removal of damaged cylinder fin area, which document should be consulted?

For determining the maximum permissible removal of damaged cylinder fin area, which document should be consulted?

• A. The airworthiness directive.
• B. The engine overhaul manual.
• C. The service bulletin.
• D. The manufacturer’s warranty.

Answer: (B)

The maximum permissible removal of damaged cylinder fin area is defined in the engine overhaul manual. This manual sets the repair limits, tolerances, and procedures for the engine, including how much material can be removed from cooling fins while still maintaining adequate cooling and structural integrity. Airworthiness directives provide mandatory actions for safety issues but don’t specify finite fin-removal limits. Service bulletins are manufacturer recommendations and may be mandatory only if adopted, but they don’t establish the official repair limits for fin removal. A warranty covers defects, not maintenance tolerances. So the authoritative source for this detail is the engine overhaul manual.

The maximum permissible removal of damaged cylinder fin area is defined in the engine overhaul manual. This manual sets the repair limits, tolerances, and procedures for the engine, including how much material can be removed from cooling fins while still maintaining adequate cooling and structural integrity. Airworthiness directives provide mandatory actions for safety issues but don’t specify finite fin-removal limits. Service bulletins are manufacturer recommendations and may be mandatory only if adopted, but they don’t establish the official repair limits for fin removal. A warranty covers defects, not maintenance tolerances. So the authoritative source for this detail is the engine overhaul manual.