Integrated Modular Avionics – Primus APEX DFZ Build 6.0 Software – Modification
Proposal for consultation. Not binding until EASA issues the final AD; the requirements can still change.
- Published
- Would replace
- 2024-0240
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected PC-24 aeroplanes must implement the abnormal procedures from AFM TR 02371-075 within 30 days after 24 December 2024. Group 1 aircraft must install the updated Primus APEX DFZ Build 6.0 software within 9 months of the directive's effective date and amend the flight manual with AFM TR 02371-081 before the next flight after software installation. Installation of affected software is prohibited after these updates or from the directive's effective date for Group 2 aircraft.
Summary
EASA Airworthiness Directive PAD No. 26-075 is a proposed directive addressing the Primus APEX DFZ Build 6.0 software modification for Pilatus PC-24 aeroplanes, specifically those with manufacturer serial numbers 101 to 337 and 501 to 600. This directive targets the integrated modular avionics system to correct flight director calculation errors on affected aircraft. It applies to PC-24 aircraft equipped with earlier software versions and mandates software updates and flight manual amendments.
What changed
This proposed directive supersedes EASA AD 2024-0240 and requires the installation of the updated Primus APEX DFZ Build 6.0 software to replace earlier versions that caused inaccurate flight director calculations. It retains previous requirements for abnormal procedures and adds mandatory software updates and flight manual revisions. The directive also prohibits installation of affected software on any PC-24 aircraft after the update or from the effective date for unaffected groups.
Why it matters
The directive addresses a safety issue where flight director errors could increase pilot workload and reduce safety margins during approach. For operators and maintenance teams, compliance ensures the avionics system functions correctly, reducing the risk of lateral course deviations. It also clarifies compliance methods and documentation updates, aiding regulatory adherence and operational safety.
More for Pilatus Aircraft PC-24
All 22- EASA AD 2026-0149Integrated Modular Avionics – Primus APEX DFZ Build 6.0 Software – ModificationJul 28, 2026
- EASA AD 2026-0008Ice and Rain Protection — Windows, Windshields and Doors / Left-Hand Windshield Heating Solid State Relay — Modification / ReplacementJan 15, 2026
- EASA AD 2025-0211Time Limits / Maintenance Checks — Airworthiness Limitations Section — AmendmentSep 26, 2025
- EASA AD 2024-0240Aeroplane Flight Manual — Section Normal Procedures / Flight Director Lateral Offset — AmendmentDec 10, 2024
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New ADs and bulletins for Pilatus Aircraft PC-24 and PC-24, summarized like this page, every Monday.