Here’s an informative post tailored for aviation maintenance technicians, engineers, or EASA Part-66 students:
In EASA Part-66 aviation maintenance engineering, the term typically refers to a specific structural or electrical bonding concept found on certain aircraft types—most notably related to the ATR 42/72 or Saab 340 (depending on maintenance manual context). Let’s break it down:
🔹 – Often a zone or structural reference code in an Aircraft Maintenance Manual (AMM) or Structural Repair Manual (SRM). In some ATR documentation, SR2 can indicate a fuselage section or a particular longeron/frame station.