3. Precautions, protective procedures, and information in the standard wiring practices for transport category aircraft, as per 14 CFR part 25 subpart H.
22 Figure 5-1. Major Repair or Major Alteration Maintenance Information Checklist A/C Make Model S/N Reg. # N Revision: Date: System:
Item Subject
1. Introduction: This section briefly describes the aircraft, engine, propeller, or component that has been altered or repaired. Include any other information on the content, scope, purpose, arrangement, applicability, definitions, abbreviations, precautions, units of measurement, referenced publications, and distribution of the maintenance information, as applicable.
2. Description: Describe the major alteration/repair and its functions, including an explanation of its interface with other systems, if any.
3. Control, operation information or special procedures, if any.
4. Servicing information, such as types of fluids used, servicing points, and location of access panels, as appropriate.
5. Maintenance instructions, such as recommended inspection/maintenance periods in which each of the major components are inspected, cleaned, lubricated, adjusted, and tested, including applicable wear tolerances and work recommended at each scheduled maintenance period. This section can refer to the manufacturer’s instructions for the equipment installed where appropriate, such as functional checks, repairs, and inspections. It should also include any special notes, cautions, or warnings, as applicable.
6. Troubleshooting information: Information describing probable malfunctions, how to recognize those malfunctions, and remedial actions to be taken.
7. Removal and replacement information: This section describes the order and method of removing and replacing products, parts, and any necessary precautions. This section should also describe or refer to such items as manufacturer’s instructions to make required tests, trim checks, alignment, calibrations, center of gravity (CG) changes, lifting or shoring, if any.
8. Diagrams: Access plates and information, if needed, to gain access for inspection.
9. Special inspection requirements, such as X-ray, ultrasonic testing, or magnetic particle inspection, if required.
10. Application of protective treatments to the affected area after inspection and/or maintenance, if any.
11. Data: Relative to structural fasteners such as type, torque, and installation requirements, if any.
12. List of special tools: Special tools required, if any.
13. For commuter category aircraft: The following additional information must be furnished, as applicable (refer to 14 CFR part 135 appendix A, § A35):
A. Electrical loads.
B. Methods of balancing flight controls.
C. Identification of primary and secondary structures.
D. Special repair methods applicable to the aircraft.
14. Recommended overhaul periods must be noted on maintenance information when an overhaul period has been set by the manufacturer of a component or equipment. Refer to 14 CFR § 43.2. If there is no overhaul period, the maintenance information for item 14 should state: “No additional overhaul time limitations.”
15. Airworthiness Limitation Section (ALS): Include any approved ALs identified by the manufacturer or Federal Aviation Administration (FAA) Certificate Management AIR Certification Branch. Example: An STC incorporated in a larger field-approved major alteration may have an AL. The FAA inspector will not establish, alter, or cancel ALs without coordinating with the appropriate FAA Certificate Management AIR Certification Branch. If there are no changes to ALs, maintenance information should state for item 15:
“No additional ALs” or “Not applicable.”
16. Maintenance information must be acceptable to the FAA. Refer to 14 CFR §§ 43.9 and 43.13. As such, changes should be documented by submitting the revised maintenance information along with the original FAA Form 337 to the Aircraft Registration Branch in Oklahoma City. An entry in the aircraft records should indicate the current revision.
23 6 ADMINISTRATIVE INFORMATION.
6.1 Acronyms.
1. 14 CFR Title 14 of the Code of Federal Regulations
2. A&P Airframe and Powerplant
3. AC Advisory Circular
4. AD Airworthiness Directive
5. AED Aircraft Evaluation Division
6. AFM Aircraft Flight Manual
7. AFMS Aircraft Flight Manual Supplement
8. AIR Aircraft Certification Service
9. AL Airworthiness Limitation
10. ALS Airworthiness Limitations Section
11. AML Approved Model List
12. AMT Aviation Maintenance Technician
13. ASI Aviation Safety Inspector
14. CAA Civil Aviation Authority
15. CAR Civil Air Regulations
16. CFR Code of Federal Regulations
17. CG Center of Gravity
18. DAH Design Approval Holder
19. DAR Designated Airworthiness Representative
20. DAR-T Designated Airworthiness Representative—Maintenance
21. DER Designated Engineering Representative
22. ELOS Equivalent Level of Safety
23. FAA Federal Aviation Administration
24. FSDO Flight Standards District Office
25. ICA Instructions for Continued Airworthiness
26. IFR Instrument Flight Rules
27. IPC Illustrated Parts Catalog
28. MRA Major Repair, Alteration, and Airworthiness (a type of ODA)
29. ODA Organization Designation Authorization
30. OEM Original Equipment Manufacturer
31. OpSpecs Operations Specifications
32. PMA Parts Manufacturer Approval
33. POH Pilot’s Operating Handbook
34. RFM Rotorcraft Flight Manual
35. RFMS Rotorcraft Flight Manual Supplement
36. RS-DER Repair Specification Designated Engineering Representative
37. SAFM Supplemental Airplane Flight Manual
38. SB Service Bulletin
39. SL Service Letter
40. SRM Structural Repair Manual
41. STC Supplemental Type Certificate
42. TC Type Certificate
43. TCDS Type Certificate Data Sheet
44. VFR Visual Flight Rules
45. W&B Weight and Balance
6.2 Related FAA Orders and ACs (current editions).
1. FAA Order 8000.95, Designee Management Policy.
2. FAA Order 8100.15, Organization Designation Authorization Procedures.
3. FAA Order 8110.4, Type Certification.
4. FAA Order 8110.37, Designated Engineering Representative (DER) Handbook.
5. FAA Order 8300.16, Major Repair and Alteration Data Approval.
6. AC 20-138, Airworthiness Approval of Positioning and Navigation Systems.
7. AC 20-180, Approved Model List Supplemental Type Certificate (AML-STC).
8. AC 21-40, Guide for Obtaining a Supplemental Type Certificate.
9. AC 23-8, Flight Test Guide for Certification of Part 23 Airplanes.
10. AC 25.1581-1, Airplane Flight Manual.
11. AC 43.9-1, Instructions for Completion of FAA Form 337.
12. AC 43.13-1, Acceptable Methods, Techniques, and Practices—Aircraft Inspection and Repair.
13. AC 43.13-2, Acceptable Methods, Techniques, and Practices—Aircraft Alterations.
6.3 Obtaining Copies of Referenced Documents and This AC.
6.3.1 A list of all ACs is available at https://www.faa.gov/regulations_policies/advisory_circula rs/. Applicants can also obtain a copy of current CFRs online at https://www.ecfr.gov.
6.3.2 The MRADA Job Aid is available at https://drs.faa.gov/browse/OTHER_JOB_AIDS/doc typeDetails.
6.4 AC Feedback Form. For your convenience, the AC Feedback Form is the last page of this AC. Note any deficiencies found, clarifications needed, or suggested improvements regarding the contents of this AC on the Feedback Form.
Appendix A A-1 APPENDIX A. INSTRUCTIONS FOR COMPLETING THE FIELD APPROVAL
CHECKLIST When requesting a field approval, you may use the fillable checklist found in Figure A-1, Field Approval Checklist, to provide the requested data, forms, descriptive items, and other information. You can also use an equivalent method for presenting the information and data. The following instructions apply to corresponding items 1 through 12 of the Field Approval Checklist as illustrated in this appendix.
Item 1—Aircraft. The Registration Number is the same as shown on AC Form 8050-3, Certificate of Aircraft Registration. Only U.S.-registered aircraft are eligible for field approvals.
Item 2—Applicant. Enter the applicant’s name, address, and telephone number.
Item 3—Type of Product and Certification Basis. On the upper line, enter a check mark in the appropriate box to identify the item being approved. If you check “Other,” enter the product’s description in the space provided. On the bottom line, check the box that identifies how your aircraft or product was certificated. If you do not know this information, you can find it on the Type Certificate Data Sheet (TCDS) for your aircraft or engine. On the TCDS, look in the section titled Certification Basis.
Item 4—Brief Description of Project. Using the space provided, enter a short summary of the proposed repair or alteration, such as “Installing a GPS in the instrument panel above the right yoke.” If you need additional space, attach a continuation page and note that on the form in this area.
Item 5—Schedule for Completion of Project. On the first line, enter the date you need the field approval. On the second line, enter the date you plan to start the work, and on the last line, enter the date you expect to complete the work.
Item 6—Who Will Perform the Repair or Alteration? On the top line, enter the name of the certificated mechanic who will be doing the work. If a repair station is doing the work, leave the mechanic’s name blank and enter the name of the repair station. On the second line, enter the mechanic’s Airframe and Powerplant (A&P) certificate number, or if a repair station is doing the work, their certificate number.
Also enter a contact name if you are using a repair station. If the aviation safety inspector (ASI) doing the approval has a question and you are not available, this will make it easier for the ASI to find someone knowledgeable about the project. On the third line, give the telephone number of the mechanic or the repair station doing the work. On the bottom line, enter the location where the work will be done. This location information should be as complete as possible.
Item 7—Designees (Designated Airworthiness Representatives (DAR) and Designated Engineering Representatives (DER)). If you are working with any DERs or DARs for this project, include their names and telephone numbers, in case the ASI needs to contact them for additional information or clarification. DERs have authorization limitations; if you are working with a designee, make sure anticipated work is within the designee’s authorization.
Appendix A A-2 Item 8—Compliance Statement and Compliance Checklist. Before completing the repair/alteration to your aircraft, be aware that the aircraft must still meet its certification basis after alteration/repair. Include an entry in block 8, to include proof or data, as well as your compliance statement, that it still meets its certification basis. The compliance checklist will list affected Title 14 of the Code of Federal Regulations (14 CFR)/Civil Air Regulations (CAR) and indicate how the applicant showed compliance. The person doing the repair or alteration creates this checklist, and should address each section of the regulations applicable to the project.
Appendix B, Instructions for Completing the Compliance Checklist, has a sample compliance checklist format.
Item 9—Previous Alterations or Repairs that May be Affected by This Alteration. Review the aircraft’s records to determine if there are any modifications, Supplemental Type Certificates (STC), alterations, or repairs that could conflict with the proposed repair/alteration. If the prior applicant completed an FAA Form 337 for repairs/alterations that might be affected, include it. If the prior applicant made a logbook entry concerning the work done, make a copy of that entry and include it in your package. Photographs and drawings of previous alterations/repairs that might be a factor can also be very helpful.
Item 10—Maintenance Information. In this attachment, describe how to maintain the airworthiness of the altered/repaired part of the aircraft. This might include 100-hour or annual inspections. These should be specific instructions, including (1) inspection items, (2) minimum or maximum measurements of parts for wear or deterioration, (3) troubleshooting, (4) functional checks, (5) installation and removal procedures, and (6) servicing requirements, such as fluid change intervals or lubrication schedules. Figure 5-1 provides guidance and a sample checklist for creating maintenance information.
Item 11—Aircraft Flight Manual Supplement (AFMS). If you have an AFMS for your alteration, include a copy of it. Guidance for creating an AFMS is available in Advisory Circular (AC) 23-8, Flight Test Guide for Certification of Part 23 Airplanes. Appendix 5 of AC 23-8 has a sample format that you can use.
Item 12—Data Attached. If the data you are attaching is included on this list, check the appropriate box. If you have data or information not included in this list, check the box labeled “Other” and enter in the space provided a short description of what you are including.
Item 13—For All the Data Submitted. Review all data submitted and determine if the data meets the requirements listed. Check the appropriate box after review.
Item 14—FAA Use Only. Do not write or mark in this area—it is for FAA use only.
Appendix A A-3 Figure A-1. Field Approval Checklist
FIELD APPROVAL CHECKLIST Instructions: Print or type all entries. This information should be as complete as possible prior to an initial discussion with the FAA.
1. Aircraft: Make Model Registration Number N Serial Number
2. Applicant: Name Address/Telephone Number
3. Type of Product and Certification Basis:
☐ Airframe ☐ Engine ☐ Appliance ☐ Other For an appliance or “Other” list:
Manufacturer:
Part Number:
Serial Number:
☐ Part 23 ☐ Part 25 ☐ Part 27 ☐ Part 29 ☐ Part 31 ☐ Part 33 ☐ CAR 3 ☐ CAR 4(a) ☐ CAR 4(b) ☐ CAR 6 ☐ CAR 7 ☐ CAR 8 ☐ CAR 13
4. Brief Description of Project:
☐ Repair ☐ Alteration
5. Schedule for Completion of Project:
Date when field approval is needed:
Date when work is to begin:
Date for ASI visit (projected):
Projected completion date for project:
6. Who Will Perform the Repair or Alteration?
Mechanic’s name: or Repair station:
Certificate no:
Contact person at the facility:
Telephone number:
Appendix A A-4 L ocation where alteration/repair will be accomplished:
7. Designees (DARs, DERs, or ODAs): ☐ None Designated Engineering Representatives (DER), Designated Airworthiness Representatives (DAR), or Organization Designation Authorization (ODA):
Name: Telephone number:
Name: Telephone number:
8. Compliance Statement and Compliance Checklist:
Attach the Compliance Checklist you completed.
9. Previous Repairs or Alterations Affected by This Alteration: Is this alteration compatible with previously installed equipment?
10. Maintenance Information and/or Instructions for Continued Airworthiness (ICA):
Maintenance information attached? ☐ Yes ☐ No Reference these in block 8 of FAA Form 337.
11. Aircraft Flight Manual Supplement (AFMS):
Do you have an AFMS? ☐ Yes ☐ No If yes, attach a copy.
12. Data Attached:
☐ Proposed FAA Form 337 ☐ Description of alteration, including drawings, schematics, and diagrams ☐ Material list ☐ Processes ☐ Specifications ☐ Previous field approvals ☐ FAA Form(s) 8110-3 ☐ Serviceable tags ☐ Placards ☐ Test data and/or flight test data ☐ Load analysis (electrical and/or structural) ☐ Other:
Appendix A A-5
13. For All the Data Submitted:
Are all applicable airworthiness requirements addressed? ☐ Yes ☐ No ☐ N/A Are all exemptions addressed? ☐ Yes ☐ No ☐ N/A Are all special conditions addressed? ☐ Yes ☐ No ☐ N/A Are the requirements of Part 26 addressed? ☐ Yes ☐ No ☐ N/A Are all applicable airworthiness directives addressed? ☐ Yes ☐ No ☐ N/A Are instructions for continued airworthiness addressed? ☐ Yes ☐ No ☐ N/A Are the applicable noise requirements addressed? ☐ Yes ☐ No ☐ N/A Are the applicable emission requirements addressed? ☐ Yes ☐ No ☐ N/A Are all changes to a flight manual addressed? ☐ Yes ☐ No ☐ N/A
14. FAA Use Only:
Date:
Assigned inspector:
FAA office:
Is a field approval appropriate? ☐ Yes ☐ No If a field approval is not performed, what is the proper method for alteration?
☐ Record entry ☐ STC ☐ Other:
Requires AIR Certification Branch concurrence? ☐ Yes ☐ No Requires AED ICA review? ☐ Yes ☐ No Additional information required:
Appendix B B-1 APPENDIX B. INSTRUCTIONS FOR COMPLETING THE COMPLIANCE
CHECKLIST The compliance checklist documents applicable regulations and associated compliance with those regulations.
Note: Optionally, you may list applicable regulatory requirements for which you still need to present substantiation data.
Instructions for completing this sample compliance checklist are as follows:
1. Title 14 of the Code of Federal Regulations (14 CFR) Part/Civil Air Regulations (CAR) Paragraph. You may list specific regulations by number, such as 14 CFR § 23.2525. Also include current amendment level.
2. Subject. You should list the subject or title of applicable 14 CFR part/CAR paragraphs, such as storage battery design and installation.
3. Method of Compliance. The method of compliance may include design drawings (D), analyses (A), tests (T), or other methods (O). Some compliance checklists simply list the letter corresponding to a method of compliance. Other checklists reference specific data by title or number. However you format the method of compliance, you and the aviation safety inspector (ASI) should agree on the format.
4. Documentation Reference. List the documentation, such as a test report number, analysis, or report number that demonstrated compliance to the subject 14 CFR part or CAR paragraph.
Figure B-1. Compliance Checklist Format 1 4 CFR Part/CAR Paragraph Subject Method of Compliance Documentation Reference
OMB Control Number: 2120-0746 Expiration Date:12/31/2027 Advisory Circular Feedback Form Paperwork Reduction Act Burden Statement: A federal agency may not conduct or sponsor, and a person is not required to respond to, nor shall a person be subject to a penalty for failure to comply with a collection of information subject to the requirements of the Paperwork Reduction Act unless that collection of information displays a currently valid OMB Control Number. The OMB Control Number for this information collection is 2120-0746. Public reporting for this collection of information is estimated to be approximately 20 minutes per response, including the time for reviewing instructions, searching existing data sources, gathering, and maintaining the data needed, completing, and reviewing the collection of information.
All responses to this collection of information are voluntary. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to:
Information Collection Clearance Officer, Federal Aviation Administration, 10101 Hillwood Parkway, Fort Worth, TX 76177-1524.
If you find an error in this Advisory Circular, have recommendations for improving it, or have suggestions for new items/subjects to be added, you may let us know by emailing this form to the F light Standards Directives Management Officer at 9-AWA-AFB-120-Directives@faa.gov.
Subject: AC 43-210A CHG 2, Standardized Procedures for Obtaining Approval of Data Used in the Performance of Major Repairs and Major Alterations Date: _____________________ Please m ark all appropriate line items:
☐ An error (procedural or typographical) has been noted in paragraph ____________ on page _______.
☐ Recommend paragraph _____________ on page __________ be changed as follows:
☐ In a future change to this AC, please cover the following subject:
(Briefly describe what you want added.)
☐ Other comments:
☐ I would like to discuss the above. Please contact me using the information below.
Submitted by: Date: ______________________ FAA 1320-73 (01/25) SUPERSEDES PREVIOUS EDITIONS