Engine - Aircraft Flight Manual – Operating Limitations
Superseded. A newer version replaces this document.
- Published
- Effective
- Deadline
- Replaces
- 2020-41
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must amend the Aircraft Flight Manual to include the new engine operating limits and revised high altitude climb procedures within 7 days of the directive's effective date. Flight crews must be informed of these changes and operate the aircraft accordingly. Any exceedance of the 94% N1 limit for more than 20 continuous seconds must be reported as required.
Summary
Canadian Airworthiness Directive CF-2019-37 is an emergency directive affecting Airbus Canada Limited Partnership BD-500-1A10 and BD-500-1A11 aircraft equipped with Pratt & Whitney PW1524G, PW1521G-3, or PW1524G-3 engines. It introduces new operating limitations in the Aircraft Flight Manual to address engine in-flight shutdowns reported on these models. The directive mandates limiting engine N1 settings to 94% above 29,000 feet to prevent potential uncontained engine failures.
What changed
This directive introduces a new limitation in the Aircraft Flight Manual restricting the engine N1 setting to a maximum of 94% when flying above 29,000 feet. It also revises the high altitude climb procedure to require autothrottle to be turned off before step climbs above 29,000 feet and includes specific anti-ice procedures to avoid engine nacelle overheating. These changes are interim safety measures pending further investigation.
Why it matters
This directive is critical for operators and maintenance teams to prevent engine failures that could lead to uncontained engine damage and compromise flight safety. Compliance ensures that flight crews operate within safe engine parameters during high altitude climbs, reducing the risk of in-flight shutdowns. It also informs maintenance and compliance personnel about updated procedures and reporting requirements for any exceedances.
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New ADs and bulletins for Airbus BD-500 (A220 Series), Canada BD-500-1A10 and Canada BD-500-1A11, summarized like this page, every Monday.