Commonwealth legislation

AD/ALF/4 - Compressor Vanes, Turbine Blades and Turbine Nozzle - Inspection and Replacement

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

This instrument requires inspection—and replacement where necessary—of compressor vanes, turbine blades and the turbine nozzle on Lycoming ALF 502 engines (models ALF 502‑L, L2, R3, R4). It does not set technical criteria itself but mandates compliance with specified Avco Lycoming service bulletins and an FAA airworthiness directive.

It affects aircraft operators, licensed maintenance organisations and parts suppliers, shifting costs and technical decision‑making to operators and the referenced SBs/AD.

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Current sections

Direct links to the current provisions in AD/ALF/4 - Compressor Vanes, Turbine Blades and Turbine Nozzle - Inspection and Replacement.

AD/ALF/4 Compressor Vanes, Turbine Blade

AD/ALF/4 Compressor Vanes, Turbine Blades and Turbine Nozzle - Inspection and Replacement

Applicability: Lycoming Turbo Fan Engine Models ALF 502-L/L2 and ALF 502-R3/R4. Document: 1. Avco Lycoming SB ALF 502-72-0012, Rev. 2.

2. Avco Lycoming SB ALF 502-72-0025, Rev. 1.

3. Avco Lycoming SBALF 502-72-0027.

4. Avco Lycoming SBALF 502-72-0021; or

5. AD/LYC-T/21.

Note: FAA AD 82-25-10 Amendment 39-4511 refers.

1/86

AD/ALF/4 Compressor Vanes, Turbine Blades and Turbine Nozzle - Inspection and Replacement

Applicability: Lycoming Turbo Fan Engine Models ALF 502-L/L2 and ALF 502-R3/R4. Document: 1. Avco Lycoming SB ALF 502-72-0012, Rev. 2.

2. Avco Lycoming SB ALF 502-72-0025, Rev. 1.

3. Avco Lycoming SBALF 502-72-0027.

4. Avco Lycoming SBALF 502-72-0021; or

5. AD/LYC-T/21.

Note: FAA AD 82-25-10 Amendment 39-4511 refers.

1/86

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.

AD/ALF/4 Compressor Vanes, Turbine Blade AD/ALF/4 Compressor Vanes, Turbine Blades and Turbine Nozzle - Inspection and Replacement

AD/ALF/4 Compressor Vanes, Turbine Blades and Turbine Nozzle - Inspection and Replacement

Applicability: Lycoming Turbo Fan Engine Models ALF 502-L/L2 and ALF 502-R3/R4. Document: 1. Avco Lycoming SB ALF 502-72-0012, Rev. 2.

2. Avco Lycoming SB ALF 502-72-0025, Rev. 1.

3. Avco Lycoming SBALF 502-72-0027.

4. Avco Lycoming SBALF 502-72-0021; or

5. AD/LYC-T/21.

Note: FAA AD 82-25-10 Amendment 39-4511 refers.

1/86 1/86

AD/ALF/4 Compressor Vanes, Turbine Blades and Turbine Nozzle - Inspection and Replacement

Applicability: Lycoming Turbo Fan Engine Models ALF 502-L/L2 and ALF 502-R3/R4. Document: 1. Avco Lycoming SB ALF 502-72-0012, Rev. 2.

2. Avco Lycoming SB ALF 502-72-0025, Rev. 1.

3. Avco Lycoming SBALF 502-72-0027.

4. Avco Lycoming SBALF 502-72-0021; or

5. AD/LYC-T/21.

Note: FAA AD 82-25-10 Amendment 39-4511 refers.

1/86