Engine Fuel and Control – Change of Flight Manual Limitation for Jet B and J-4 Fuels
Superseded. A newer version replaces this document.
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Bell 505 helicopters must update the rotorcraft flight manual to Revision 3 or a later Transport Canada-approved revision within 30 days of the directive's effective date. Compliance with CAR 605.84 regarding airworthiness directives must be ensured before conducting take-offs. Contact Transport Canada for alternative means of compliance if necessary.
Summary
Canadian Airworthiness Directive CF-2019-08 addresses Bell Helicopter Textron Canada Limited model 505 helicopters, serial number 65011 and subsequent. This directive mandates updating the rotorcraft flight manual to correct altitude limitations when operating with Jet B and JP-4 wide-cut fuels. The update ensures safe engine performance by reflecting accurate operating limits for these fuel types.
What changed
CF-2019-08 introduces a revision to the flight manual, specifically Revision 3 of BHT-505-FM-1, which corrects previously invalid altitude limitations for Jet B and JP-4 fuels. The updated manual now accurately defines safe operating altitudes to prevent engine performance issues when using these fuel types.
Why it matters
This directive is critical for aviation professionals as using incorrect altitude limitations with wide-cut fuels can lead to low fuel pressure, engine flame-out, or power interruptions. Operators and maintenance teams must ensure compliance to maintain engine reliability and flight safety. Failure to comply could result in unsafe flight conditions and regulatory violations.
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