AC 120-78B

Advisory circular · Electronic Signatures, Electronic Recordkeeping, and Electronic Manuals

Approved
December 11, 2024
Last reviewed
December 12, 2024
Family
AC 120-78 · 5 versions
Revision
B
14 CFR parts
91, 117, 121, 125, 133, 135, 136, 142

Guidance, not mandatory unless a rule or AD requires it. DRS record last changed November 22, 2025.

Show pages 23–34

• AC 120-64, O perational Use and Modification of Electronic Checklists.

• AC 120-76, Authorization for Use of Electronic Flight Bags.

6.3.5 Other Reading Material:

• OMB Memorandum M-00-15, OMB Guidance on Implementing the Electronic Signatures in Global and National Commerce Act.

• Federal Information Processing Standards (FIPS) Publication 186-5, Digital Signature Standard (DSS) at https://doi.org/10.6028/NIST.FIPS.186-5.

6-3

Appendix A A-1 APPENDIX A. SAMPLE LETTER OF INTENT Note: Certificate holders should use this AC to identify the various requirements for the Letter of Intent contents.

[Requester Letterhead] To: [Responsible Flight Standards office] From: [Requester] Date: [Date] Subject: Use of Electronic System – (Signatures/Recordkeeping/Manuals) This letter is to inform you that [requester] intends to use an electronic (signatures and/or recordkeeping and/or manual) system for [describe what the system will be used for]. This system has been established using the guidelines outlined in FAA Advisory Circular (AC) 120-78 (as amended).

Company facilities, equipment, and personnel are available for your review at [address] on [date]. Please contact [name] at [telephone] to arrange a visit to review the system and to discuss any FAA concerns.

Sincerely, [Requester]

Advisory Circular Feedback Form If you find an error in this AC, have recommendations for improving it, or have suggestions for new items/subjects to be added, you may let us know by contacting the Flight Standards Directives Management Officer at 9-AWA-AFB-120-Directives@faa.gov.

Subject: AC 120-78B, Electronic Signatures, Electronic Recordkeeping, and Electronic Manuals Date: _____________________ Please check all appropriate line items:

An err or (pro ce dural 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.

Submitted by: Date: ______________________