FAA Logbook Requirements for Owner-Performed Preventive Maintenance

In the U.S. Air Force, one of the most important jobs of the Dedicated Crew Chief is taking obsessively good care of “the forms.” The form is a binder containing maintenance documentation that reflects the aircraft’s current maintenance status. It is made up of active discrepancies, deferred discrepancies to be dealt with later, and a few other things that really pertain only to large jet aircraft.

But the concept carries over to your Cessna. Identifying exactly what happened, what was done, when it was accomplished, and who performed the task are absolutely vital to the aircraft’s overall safety and to accountability among all interested parties (of which there are many if an incident ever occurs).

This is one of those areas where people always get a little nervous: how exactly should you fill out your logs? Thankfully, it is all spelled out in the FARs and FAA Advisory circulars. Also, if you are a CPA member, you will already have access to a wonderful resource library of in-house technical notes, which Tech Note No. 2 covers in great detail. Let’s take a look at this process and how it all shakes down.

Why Proper Documentation Matters

Cessna owner-pilots may perform some maintenance on their own aircraft, which is outlined in FAR 43.3(g). However, documenting it is mandatory, per FAR 43.9. Also, it is kind of important to understand a few things about how the FAA (and any other federal government agency) writes guidelines. Some of these are compulsory, while others are not. Also, some of these are non-regulatory (Advisory Circulars), while others are (FARs).

The non-regulatory A/Cs provide guidance on applying regulatory instructions, whereas the FAR establishes the legally binding framework. It gets even more convoluted when you get into CFRs, but that is a different story.

So, in this case, the guidance in FAR 43 is compulsory and must be abided by, and A/C 43-9 guides you with the correct way to conduct the documentation. Now, documentation is far more important than just satisfying the legal requirements; documentation is truly a matter of life and death. It is also a bellwether of the value of your aircraft. Aircraft with good, easily traceable documentation generally retain their value better and, in themselves, are a great asset.

– AC 43-9C emphasizes that adequate maintenance records are a condition of an aircraft’s airworthiness.

– CPA Tech Note #002 reminds owners that all maintenance actions must be recorded.

– Real logbook reference: N6196P’s entries show concise but complete documentation.

Regulatory Foundations for Preventive Maintenance Recordkeeping

Being able to perform a preventive maintenance operation legally, however, and also having the knowledge and capability to do it correctly can be two different things. The Cessna Pilots Association strongly suggests that the first time an owner performs a specific preventive maintenance function, they do so under the supervision of a licensed

mechanic. Not only will the owner learn the proper way to do things, but they will also pick up tips to make the task easier.

The FARs require that all maintenance actions, including preventive maintenance actions performed by the owner, be recorded in the aircraft’s maintenance records. This is important not only from a legal standpoint but also for maintaining an accurate maintenance history of the aircraft.

Now, let’s dive into the specifics of what exactly the FARs say about this.

FAR 43.3(g): Who May Perform Preventive Maintenance

“Except for holders of a sport pilot certificate, the holder of a pilot certificate issued under part 61 may perform preventive maintenance on any aircraft owned or operated by that pilot which is not used under part 121, 129, or 135 of this chapter. The holder of a sport pilot certificate may perform preventive maintenance on an aircraft owned or operated by that pilot and issued a special airworthiness certificate in the light-sport category.”

This is verbatim from the FAR, and as it reads, holders of a pilot certificate, other than a sport pilot, are allowed to perform PMs on their own aircraft. Of course, this does require a list of the items they are allowed to perform, which we will go over at length in a later article.

FAR 43.9: Minimum Required Elements of a Maintenance Entry

When an aircraft owner who meets the minimum license qualifications completes a preventive maintenance action on their aircraft, or an A&P performs repairs or inspections, the work is not considered complete until all of it is properly documented. These are the mandatory components:

Description of the work performed: All entries must clearly describe the work performed, the items replaced, or repairs conducted, or inspections performed. The description needs to be specific enough to stand on its own, with no vague shorthand or assumptions. Not only is this important for compliance, but with maintaining an accurate mechanical history of the aircraft.

Date of completion: FAR 43.9 requires the actual date that work was completed. This timestamp is critical for tracking inspection cycles and intervals, component life limits, and any regulatory cycles.

Name of the person performing the work: Even if someone besides the signer performs the task, the individual who performed the work must be identified in the maintenance logs. Accountability is critical in aircraft maintenance.

Signature, certificate number, and certificate type: the certificated individual who approves the aircraft for return to service must sign off on the entry and include their certificate type and number. In this case, it would be the PPL (or higher) certificate number.

Level of detail per AC 43-9C: AC 43-9 dictates that maintenance entries must be detailed enough that a person unfamiliar with the work can understand it. In practice, that means the entry should explain the task, method, and corrective action to a complete stranger. Overly cryptic notes, internal shop-specific abbreviations, or incomplete descriptions can make entries non-compliant.

FAR 91.417: What Owners Must Keep

FAR 43.9 dictates how maintenance is recorded, but FAR 91.417 outlines what owners are required to retain as part of the permanent record of the aircraft. As stated earlier, maintenance records form the regulatory backbone of the aircraft’s permanent maintenance record, so annotating them correctly is profoundly important. Poor record management creates unwanted gaps in maintenance records that can complicate resales and even ground the aircraft.

No matter how you slice it, improper maintenance log-keeping is always a losing proposition.

Per FAR 91.417, owners must maintain and make available the following:

All preventative maintenance records: any PMs performed by an A&P mechanic or an eligible aircraft owner under FAR 43 Appendix A(c) must be documented and kept. These entries prove that tasks were performed correctly and return-to-service requirements have been met.
Total time in service: owners are obligated to keep an accurate tally of the aircraft’s total time in service, along with the time-in-service of major components. On your Cessna 182 or Cessna 210, these would mostly be the engine and propeller.
Airworthiness Directive (AD) compliance information: One of the most critical parts of aircraft maintenance documentation, owners must retain
- identification of each AD applicable to the aircraft, engine, propeller, or appliance
- the method of compliance
- the AD’s effective date
- recurring inspection or replacement intervals, if applicable
The status of life-limited parts and required inspections: certain components (engines, propeller hubs, landing gear components) may have FAA-mandated life limits. Owners have to

How AC 43-9C Guides Recordkeeping for Owners

Advisory Circulars, such as AC 43-9C, provide practical guidance on how to remain in compliance. AC 43-9C (and the “C” is subject to change, since it is the edition of the publication). The records need to demonstrate compliance with 14 CFR Parts 43 and 91. While it is not regulatory, it does explain the acceptable methods that the FAA uses to evaluate whether entries are compliant.

Level of Detail Required

AC 43-9C emphasises that maintenance entries must be written with enough clarity that a technician unfamiliar with the work or the aircraft can step into the task and clearly understand what has been done, by whom, and so on.

It does not mean that every step has to be written verbatim in the technical manuals, but the entry must be clear enough to describe the task performed, the component involved, and the methods used. Vague statements like “serviced engine” or “repaired as required” are discouraged because they convey nothing useful to the future owners or anyone tasked with working on the aircraft who is not familiar with it.

Acceptable Use of References

Since these tasks can be rather long and detailed, AC 43-9 lets maintainers and approved owner-pilots to reference approved technical data instead of rewriting detailed procedures. Any of you owners who were in military aircraft maintenance will instantly recognize the similarity to what we were trained to do; i.e., “TROUBLESHOT LEFT MAIN GEAR INDICATION SYSTEM IAW TO 1C-130H-2-32JG-00-1. FOUND DEFECTIVE DOWNLOCK PROXIMITY SWITCH. REPLACED SWITCH P/N MS12345-6. OPS CHECK GOOD. NO FURTHER DISCREPANCIES NOTED.”

The technical data is clearly referenced, so you can go directly to that task rather than write it out.

For your Cessna, it will read something like this: TROUBLESHOOT COM RADIO INTERMITTENT RECEIVE. FOUND LOOSE BNC CONNECTOR AT COM ANTENNA BASE. SECURED AND TORQUED CONNECTOR IAW AC 43.13-1B, CHAPTER 11. PERFORMED OPERATIONAL CHECK—COM SYSTEM OPERATES NORMALLY.

You can see that this corrective action references AC 43.13-1B, which provides all acceptable methods for aircraft maintenance and repair.

Signature and Certificate Requirements

For PMs conducted by an owner-pilot, AC 43-9C reinforces the FAR 43.9 signature requirements. The person who performed the task and approved the aircraft for return to service must sign the entry and include their own certificate number and the type of certificate.

Where to Document Owner-Performed Preventive Maintenance

AC 43-9 clearly states that maintenance records have to provide continuity and accurately reflect which component or system was worked on, replaced, and so on. These regulations do not require separate log books for the airframe, engine, and propeller systems. The AC states that many owners find it easier to organize and track the information, especially when it comes time to sell. Here is exactly what AC 43-9C says:

Section 91.417(a)(1). Requires a record of maintenance for each aircraft (including the airframe) and each engine, propeller, rotor, and appliance of an aircraft. This does not require separate or individual records for each of these items. It does require the information specified in § 91.417(a)(1) through 91.417(a)(2)(vi) to be kept for each item as appropriate. As a practical matter, many owners and operators find it advantageous to keep separate or individual records since it facilitates transfer of the record with the item when ownership changes. Section 91.417(a)(1) has no counterpart in § 43.9 or § 43.11.

So again, it is not required to keep separate logs, but it is encouraged and is perfectly admissible to do so to keep your records organized.

Airworthiness Directive (AD) Documentation Requirements

ADs are mandatory maintenance items, and AC 43-9 explains that AD documentation is a critical part of the aircraft’s permanent record. Mechanics typically perform and sign off on the work; the owner/operator is ultimately responsible for ensuring that AD compliance is tracked, documented, and retained. AC 43-9 provides clear guidance on the required information, and Appendix 1 provides a suggested format for AD compliance tracking.

Examples of Good Recordkeeping Practices

Here are a few samples of what your records should look like.

Example 1 — Cleaning & Gapping Spark Plugs

Date: 06/05/2025
Tach: 1,845.2

Description of Work Performed:
Removed all eight spark plugs, cleaned carbon deposits, inspected electrodes, and set gaps to .016–.021 in accordance with Lycoming SI-1042 and Cessna 172S MM Ch. 74-00-00. Reinstalled plugs and torqued to 204 in-lbs. Conducted engine run-up; magneto drop normal.