Fuel — Distribution — Fuel Pressure Switch Missing Lockwire
- Published
- Effective
- Deadline
- Replaces
- 2021-21
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must perform visual inspections, torque checks, and install lockwire on AC boost pump cartridge fuel pressure switches before accumulating 2450 flight hours from 14 July 2021. For engine feed pressure switches, inspections and torquing must be done before 935 flight hours from 14 July 2021 and repeated every 935 hours until installing the new flange adaptor and lockwire before 9350 flight hours from the AD effective date. Compliance must follow Airbus Canada service bulletins approved by Transport Canada.
Summary
Canadian Airworthiness Directive CF-2021-50 addresses missing lockwire on fuel pressure switches in Airbus Canada Limited Partnership BD-500-1A10 and BD-500-1A11 aircraft. The directive mandates inspections, torquing, and installation of lockwire on fuel pressure switches located on AC boost pump cartridges and engine feed pressure switches to prevent fuel leaks and fire hazards. It applies to specific serial numbers of these aircraft models.
What changed
CF-2021-50 supersedes AD CF-2021-21 and introduces the requirement to install a new flange adaptor with lockwire on engine feed pressure switches, terminating repetitive inspections at those locations. It retains previous inspection and torquing requirements for AC boost pump cartridge locations and updates the applicability by excluding certain serial numbers addressed in production.
Why it matters
This directive is critical for aviation professionals to prevent fuel leaks caused by loose fuel pressure switches, which pose a fire risk. Operators and maintenance teams must ensure compliance to maintain aircraft airworthiness and safety. The updated requirements streamline maintenance by allowing termination of repetitive inspections after flange adaptor installation.
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Get the next one by email
New ADs and bulletins for Airbus BD-500 (A220 Series), Canada Limited Partnership BD-500-1A10 and Canada Limited Partnership BD-500-1A11, summarized like this page, every Monday.