EASA AD 2021-0058: Lights — Emergency Cabin Lighting Circuit Breaker 2LN — Replacement | RegNotify

Airworthiness DirectiveEASA AD 2021-0058

Lights — Emergency Cabin Lighting Circuit Breaker 2LN — Replacement

Published: Mar 1, 2021
Effective: Mar 15, 2021
Deadline: Sep 15, 2021

AI-generated summary of the official EASA document. Verify against the PDF before acting.

What to do

Operators and maintenance organizations must replace the affected 5A emergency cabin lighting circuit breaker 2LN with a 7.5A rated part within 6 months or 1,000 flight hours from 15 March 2021, whichever occurs first. After replacement, the 5A circuit breaker must not be reinstalled on the aircraft. The replacement must be performed following SAAB Service Bulletin 340-33-062 instructions.

Summary

EASA Airworthiness Directive 2021-0058 is an airworthiness directive issued by the European Union Aviation Safety Agency affecting SAAB 340B aeroplanes, specifically serial numbers 342 and 359 to 459 inclusive. The directive addresses the emergency cabin lighting circuit breaker 2LN, requiring replacement of the existing 5A rated circuit breaker with a 7.5A rated unit to ensure proper emergency lighting functionality.

What changed

This new airworthiness directive introduces a mandatory replacement of the emergency cabin lighting circuit breaker 2LN rated at 5A with a serviceable part rated at 7.5A. It also prohibits the (re)installation of the affected 5A circuit breaker on the specified SAAB 340B aeroplanes.

Why it matters

This directive is critical for aviation professionals because the original 5A circuit breaker can trip under maximum charging conditions, potentially leading to insufficient emergency battery charge and loss of emergency cabin lighting. Compliance ensures the safety of occupants during evacuations and maintains regulatory airworthiness standards.

More for Saab Ab 340

All 9

Get the next one by email

New ADs and bulletins for Saab Ab 340 and SAAB 340B, summarized like this page, every Monday.