Airbus A330 Software Fix Targets Engine Bleed-Air System Issues
Published Date: 10/19/2026
Rule
Summary
If you fly or maintain Airbus A330-841 and -941 planes, listen up! The FAA updated safety rules to fix engine bleed air system issues by requiring software updates, new maintenance steps, and manual changes starting November 23, 2026. These changes keep flights safer without the hassle of repeatedly swapping parts, but operators need to act on time to avoid costly delays.
Analyzed Economic Effects
4 provisions identified: 1 benefits, 2 costs, 1 mixed.
Required maintenance, tests, and manual updates
If you operate or maintain Airbus A330-841 or -941 airplanes in the U.S., you must continue required actions from AD 2025-04-05: revise the airplane flight manual (AFM) and minimum equipment list (MEL), perform one-time or repetitive EBAS high pressure valve (HPV) seal integrity tests, follow additional maintenance and corrective actions, and comply with the AD by the times specified. The FAA estimates this AD affects 22 U.S. airplanes and that the retained actions cost up to $1,303 per airplane; on-condition repairs (if triggered) could cost up to $116,357 per airplane.
Modify/replace HPVs to stop repetitive clip swaps
You may modify or replace both affected EBAS HPVs (or replace affected HPVs with non-affected HPVs P/N 71070A030001) to terminate the repetitive HPV clip replacement requirement, provided no affected HPV is re-installed on that airplane. The FAA lists an estimated optional modification cost of $97,790 per airplane (labor $935 plus parts $96,885).
Mandatory BMC software update and software ban
If your A330-841/-941 is equipped with BMC software 4.0 or 4.1 (Groups 1 and 2), you must update the bleed monitoring computer (BMC) software to SW 5.0 and complete additional work and MEL revisions as required; the AD also prohibits installing BMC SW 4.0 or 4.1 on specified airplanes and after modification. The FAA estimates the software update labor is 5 work-hours ($425) plus parts $524 for a total of $949 per airplane; the AD is effective November 23, 2026.
Credit for prior HPV replacements using AMM tasks
If you replaced both affected HPVs with non-affected HPVs (P/N 71070A030001) before the AD effective date using Airbus AMM Tasks 36-11-51-000-806 and 36-11-51-400-806, that work may be credited in lieu of the AD modification. This credit applies to replacements done before November 23, 2026.
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