The National Transportation Safety Board has issued a safety recommendation urging the Federal Aviation Administration to mandate visual verification of propeller reversing lever and guide pin installation during routine inspections.
Safety recommendation
The National Transportation Safety Board has issued a safety recommendation urging the Federal Aviation Administration to mandate visual verification of propeller reversing lever and guide pin installation during routine inspections.
The National Transportation Safety Board (NTSB) has released safety recommendation ERA15FA129, designated as A-16-053, directed to the Federal Aviation Administration. This recommendation calls for the issuance of a special airworthiness information bulletin aimed at maintenance personnel. The proposed bulletin would instruct technicians to perform specific visual verifications during routine scheduled inspections and after propeller installation on Pratt & Whitney model PT6A engines. Specifically, the guidance requires staff to confirm that the propeller reversing lever, also known as the beta arm, and its associated guide pin are correctly installed. If any improper installations are identified during these checks, maintenance personnel would be directed to take necessary corrective actions to ensure proper configuration. This measure is intended to address potential installation errors that could affect engine operation.