Pneumatic — Engine Bleed Pressure Regulating Shutoff Valve (PRSOV) Failure
- Published
- Effective
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected BD-500-1A10 and BD-500-1A11 aircraft must amend their Airplane Flight Manuals within 60 days of April 29, 2025, to include new BLEED LEAK procedures. Dispatch restrictions apply immediately for aircraft with inoperative PRSOVs under specified MMEL items in icing conditions. The PRSOVs must be replaced with redesigned parts within 9350 flight hours from the effective date of April 29, 2025.
Summary
Canadian Airworthiness Directive CF-2025-20 addresses failures of the Pneumatic Engine Bleed Pressure Regulating Shutoff Valve (PRSOV) on Airbus Canada Limited Partnership BD-500-1A10 and BD-500-1A11 aircraft. The directive targets serial numbers 50001 through 50072 for BD-500-1A10 and 55001 through 55271 for BD-500-1A11. It mandates revisions to the Airplane Flight Manual and replacement of the PRSOV with a redesigned part to mitigate risks associated with bleed air leaks.
What changed
CF-2025-20 introduces new operational procedures in the Airplane Flight Manual to handle persistent BLEED LEAK cautions and imposes operational restrictions on dispatching aircraft with inoperative PRSOVs in known or forecast icing conditions. It also requires replacement of the existing PRSOV part number 70115B010001 with a redesigned valve within 9350 flight hours to reduce failure rates.
Why it matters
This directive is critical for maintaining safe flight operations by preventing potential damage from bleed air leaks that could compromise aircraft systems and structures. Operators must comply to avoid increased pilot workload and reduced safety margins caused by PRSOV failures. Maintenance and compliance teams need to ensure timely AFM updates and part replacements to meet regulatory requirements and maintain airworthiness.
More for Airbus BD-500 (A220 Series)
All 123- EASA AD CF-2026-49Engine Controls – Throttle Quadrant Assembly – Throttle Lever Jamming - ReplacementOct 12, 2026
- EASA PAD 26-112Fuselage – Mid Avionics Bay – ModificationSep 23, 2026
- EASA AD CF-2026-45Wings – Discrepant Fasteners at Wing to Fuselage Joint - AmendmentSep 11, 2026
- EASA AD CF-2026-40Time Limits/Maintenance Checks – New and Revised Airworthiness Limitations TasksSep 2, 2026
- EASA AD CF-2026-36Fuselage – Skin Assembly – Discrepant Fasteners at Air Data System Probe Doubler - Replacement
Get the next one by email
New ADs and bulletins for Airbus BD-500 (A220 Series), summarized like this page, every Monday.