Airworthiness DirectiveEASA AD BR-2023-11-01

KIDDE AEROSPACE & DEFENSE - Overheat Detection System - Inspection / Replacement

Published: Nov 21, 2023
Effective: Nov 21, 2023
Deadline: Nov 21, 2026

Embraer ERJ 170 100 200

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What to do

Operators of Embraer ERJ 170-100 and ERJ 170-200 aircraft must inspect the ODS sensing elements on the APU bleed line, wing anti-ice ducts, and wing bleed system within 7,500 flight hours or 36 months from November 21, 2023. If any overheat, short, or open conditions are detected, troubleshooting and sensor replacement or deactivation must be conducted per Embraer Service Bulletin 170-36-0027 revision 04. Compliance with these actions is mandatory before further flight.

Summary

Brazilian Airworthiness Directive AD No. 2023-11-01 issued by Agência Nacional de Aviação Civil (ANAC) mandates inspection and possible replacement of Overheat Detection System (ODS) sensing elements on Embraer S.A. ERJ 170 series aircraft. The directive addresses potential defects in Kidde Aerospace & Defense ODS sensing elements manufactured before January 31, 2021, which could fail to detect thermal bleed leaks and pose fire risks. The affected aircraft models include ERJ 170-100 and ERJ 170-200 variants as specified in Embraer Service Bulletin 170-36-0027 revision 04.

What changed

This new airworthiness directive introduces mandatory inspections and corrective actions for ODS sensing elements on specific Embraer ERJ 170 models. It requires operators to inspect the APU bleed line, wing anti-ice supply ducts, and wing bleed system sensing elements within 7,500 flight hours or 36 months, whichever occurs first. Replacement or deactivation of defective sensors must be performed following detailed procedures in the referenced Embraer service bulletin.

Why it matters

The directive is critical for maintaining flight safety by preventing undetected thermal bleed leaks that could ignite fuel tanks and damage aircraft structures. Operators, maintenance organizations, and compliance teams must ensure timely inspections and repairs to avoid operational restrictions or safety hazards. Adhering to this AD helps mitigate latent failures in the ODS and ensures continued airworthiness of affected Embraer ERJ 170 aircraft.

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