Embraer ERJ 170 and ERJ 190 Aeroplanes - Horizontal Stabilizer Control-Yoke Support Installation
- Published
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Owners and operators of affected Embraer ERJ 170 and ERJ 190 aircraft are recommended to modify the control-yoke installation following the instructions in the relevant Embraer Service Bulletins 170-27-0051, 190-27-0039, or 190LIN-27-0019. Although not mandatory, implementing these modifications will enhance safety by preventing inverted pitch trim switch installation. No specific compliance deadline is stated.
Summary
The Embraer ERJ 170 and ERJ 190 Aeroplanes - Horizontal Stabilizer Control-Yoke Support Installation is a Special Airworthiness Bulletin issued by ANAC addressing an inverted installation issue of the control-yoke pitch trim switches on Embraer ERJ 170 and ERJ 190 aircraft models. This bulletin informs operators about the potential for opposite commands on the horizontal stabilizer due to the upside-down installation of these switches. It applies to various ERJ 170 and ERJ 190 variants as identified in specific Embraer service bulletins.
What changed
This bulletin introduces awareness of the inverted installation of pitch trim switches in the control yoke, which can cause significant pitch mistrim and reduce airplane controllability. It provides non-mandatory recommendations to modify the control-yoke by installing an improved error-proofing device as detailed in Embraer Service Bulletins 170-27-0051, 190-27-0039, and 190LIN-27-0019. No Airworthiness Directive has been issued at this time.
Why it matters
This issue is critical for aviation professionals because undetected inverted pitch trim switches can lead to incorrect horizontal stabilizer commands, potentially compromising flight safety. Operators and maintenance teams must be vigilant during preflight checks and consider modifications to prevent pitch mistrim events. Compliance teams should monitor for any future mandatory directives related to this bulletin.
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