# Proposed Advisory Circular; Instructions for Continued Airworthiness; Maintenance Tasks for High Intensity Radio Frequency (HIRF)/Electromagnetic Interference (EMI)/Lightning Protection Features
**AGENCY:**
Federal Aviation Administration, DOT.
**ACTION:**
Notice of availability of proposed advisory circular and request for comments.
**SUMMARY:**
The Federal Aviation Administration (FAA) announces the availability of proposed advisory circular (AC) number 33.4-3, Instructions for Continued Airworthiness; Maintenance Tasks for High Intensity Radio Frequency (HIRF)/Electromagnetic Interference (EMI)/Lightning Protection Features.
**DATES:**
Comments must be received on or before February 16, 2004.
**ADDRESSES:**
Send all comments on the proposed AC to the Federal Aviation Administration, Attn: Gary Horan, Engine and Propeller Standards Staff, ANE-110, 12 New England Executive Park, Burlington, MA 01803-5299.
**FOR FURTHER INFORMATION CONTACT:**
Gary Horan, Engine and Propeller Standards Staff, ANE-110, at the above address, telephone: (781) 238-7164; fax: (781) 238-7199; e-mail: *[email protected].*
**SUPPLEMENTARY INFORMATION:**
**Comments Invited**
A copy of the subject AC may be obtained by contacting the person named under *FOR FURTHER INFORMATION CONTACT* or by downloading the proposed AC from the following Internet Web site: *http://www.airweb.faa.gov/rgl.* The FAA invites interested parties to comment on the proposed AC. Comments should identify the subject of the AC and be submitted to the individual identified under *For Further Information Contact* . The FAA will consider all communications received by the closing date before issuing the final AC.
**Background**
This AC provides guidance and methods, but not the only methods, that may be used to demonstrate compliance with § 33.4 of title 14 of the Code of Federal Regulations (14 CFR 33.4), Instructions for Continued Airworthiness. This AC provides maintenance tasks to ensure the integrity of HIRF/Lightning protection features.
(Authority: 49 U.S.C. 106(g), 40113, 44701-44702, 44704.)
Issued in Burlington, Massachusetts, on November 6, 2003.
Robert Guyotte,
Acting Manager, Engine and Propeller Directorate, Aircraft Certification Service.