Aircraft Flight Manual - Engine N1 Setting Limitation - Amendment / Electronic Engine Control Software Upgrade
- Published
- Effective
- Deadline
- Replaces
- 2020-07-01
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must amend the Aircraft Flight Manual within 30 days after July 15, 2020, to include the new engine N1 limitation and revised climb procedures for flights above 33,000 feet. Additionally, the Electronic Engine Control software must be upgraded to version 9.5.6.7 or later within 12 months of the AD's effective date, after which the AFM amendments can be removed. Alternative compliance methods require approval from ANAC's Continuing Airworthiness Technical Branch.
Summary
The Brazilian Airworthiness Directive AD No. 2020-07-01R01 titled "Aircraft Flight Manual - Engine N1 Setting Limitation - Amendment / Electronic Engine Control Software Upgrade" applies to Yaborã Indústria Aeronáutica S.A. ERJ 190-400 aircraft equipped with FADEC software version 9.5.6 or earlier. It addresses safety concerns related to the PW1900 engine model installed on these aircraft. The directive mandates changes to the Aircraft Flight Manual and an upgrade to the Electronic Engine Control software to mitigate in-flight engine shutdown risks.
What changed
This amendment cancels and supersedes AD No. 2020-07-01 and introduces a new limitation on the engine N1 setting for flights above 33,000 feet, restricting it to a maximum of 96% during normal operations. It also requires an upgrade of the Electronic Engine Control software to version 9.5.6.7 or later approved versions, which, once installed, removes the need for the AFM limitations.
Why it matters
This directive is critical for maintaining flight safety by preventing uncontained engine failures caused by low-pressure compressor rotor issues at high altitudes and thrust settings. Operators and maintenance teams must comply to avoid potential engine damage, aircraft damage, and loss of control. Compliance ensures continued airworthiness and regulatory conformity for affected ERJ 190-400 aircraft.
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