Superseded by FAA AD 2021-14-06
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Affected operators must remove the specified EEC FADEC software and install the approved software version. Engines installed on aircraft require software updates within 15 flight cycles after installation, while the rest of the fleet must comply within 90 days of the AD's effective date. Stakeholders should review Pratt & Whitney service bulletins PW1000G-A-73-00-0036-00A-930A-D and PW1000G-A-73-00-0041-00A-930A-D for detailed procedures.
Summary
FAA Airworthiness Directive 2020-07-02 is a final rule addressing all Pratt & Whitney PW1519G, PW1521G, PW1521G-3, PW1521GA, PW1524G, PW1524G-3, PW1525G, and PW1525G-3 model turbofan engines. It mandates the removal of certain electronic engine control (EEC) full authority digital electronic control (FADEC) software versions and requires installation of updated software to prevent low-pressure compressor rotor 1 (LPC R1) failures. This directive responds to multiple in-flight shutdowns and cracked LPC R1 findings.
What changed
This AD introduces a requirement to replace specific EEC FADEC software versions with updated versions that improve vane scheduling to avoid acoustic resonance damaging the LPC R1. It supersedes previous ADs related to LPC R1 inspections by mandating software updates rather than inspections alone. The directive is issued as an interim action pending further investigation.
Why it matters
This AD is critical for aviation professionals because LPC R1 failures can cause uncontained engine debris release, posing significant safety risks to aircraft and passengers. Operators and maintenance teams must ensure timely software updates to maintain engine integrity and prevent costly in-flight shutdowns. Compliance reduces the risk of engine damage and enhances overall flight safety.
More for Pratt & Whitney PW1500G
All 13- EASA AD US-2025-04-13Engine - High-Pressure Compressor (HPC) 7th-Stage Axial Rotor - Inspections / ReplacementMar 14, 2025
- EASA AD US-2024-06-04Engine - High Pressure Turbine (HPT) 1st and 2nd Stage Hubs, High Pressure Compressor (HPC) 8th Stage Disks - Inspection / HPC 7th Stage Rotors, HPC 8th Stage Disks, HPC Rear Hubs, HPT 1st and 2nd Stage Hubs, HPT 1st and 2nd Stage Air Seals, HPT 1st and 2nd Stage Blade Retaining Plates - ReplacementApr 12, 2024
- EASA AD US-2022-27-04Engine Controls - Electronic Engine Control Full Authority Digital Engine Control Software - ReplacementJan 3, 2023
- EASA AD US-2022-15-03
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New ADs and bulletins for Pratt & Whitney PW1500G, summarized like this page, every Monday.