EASA SIB AV-11-2011
EMBRAER ERJ 170/175 and ERJ 190/195 Aeroplanes - Flap or Slat Torque Tubes Improper Installation
Summary
The document titled EMBRAER ERJ 170/175 and ERJ 190/195 Aeroplanes - Flap or Slat Torque Tubes Improper Installation is an Aviation Alert (AV Nº 11/2011) issued on October 4, 2011. It addresses the correct installation of flap and slat torque tubes on EMBRAER ERJ-170/175 and ERJ-190/195 airplanes to prevent system failures. The alert informs operators about revisions to Aircraft Maintenance Manual (AMM) tasks related to these components.
What Changed
This alert introduces revisions to specific AMM tasks that include detailed illustrations to distinguish correct from incorrect installation of flap and slat torque tubes. The revised tasks cover removal, installation, and detailed visual inspections of the flap and slat mechanical drive lines. These changes aim to reduce the recurrence of flap or slat failures caused by improper torque tube installation.
Why It Matters
Proper installation of flap and slat torque tubes is critical to avoid failures that can increase landing distances, fuel consumption during diversions, and flight crew workload. For operators and maintenance teams, adhering to these revised procedures enhances flight safety and operational reliability. Compliance helps prevent costly unscheduled maintenance and potential safety incidents.
What To Do
Owners and operators of EMBRAER ERJ-170/175 and ERJ-190/195 airplanes should perform detailed inspections of flap and slat mechanical drive lines following the revised AMM tasks dated January 31, 2011, for ERJ-170/175 and July 15, 2010, for ERJ-190/195. Any discrepancies found must be corrected before the next flight. Additionally, maintenance programs should be updated to include these revised AMM tasks to ensure ongoing compliance.