Manufacturer Maintenance Recommendations
No section of 14 CFR Part 107 names a maintenance interval, a service schedule, or a component replacement limit. That surprises many people studying for the Part 107 test, since Part 91 and Part 135 build detailed prescriptive maintenance programs around manned aircraft. This lesson explains what fills that gap for a remote pilot in practice — the aircraft manufacturer's own maintenance and service guidance — and why following it is the practical way of meeting 14 CFR 107.15's ongoing duty for a specific airframe, even though no regulation requires following it by name.
No Part 107 regulation mandates a manufacturer maintenance schedule
It is important to be precise here: there is no section of 14 CFR Part 107 that requires a remote pilot to follow a manufacturer's maintenance or service manual, and no regulation number to memorize for a "manufacturer maintenance requirement," because no such standalone requirement exists in this part. What does exist is 14 CFR 107.15, covered in the previous lesson, which requires the aircraft to be in a condition for safe operation and requires the remote pilot to inspect it before every flight. Manufacturer guidance is not itself a separate regulatory mandate — it is the practical tool a remote pilot uses to actually meet that existing 107.15 duty for one specific airframe.
How this compares to manned aviation, for context
Manned aircraft operated under 14 CFR Part 91 are generally required to undergo annual inspections, and aircraft used for hire under Part 135 follow even more structured, FAA-approved inspection programs, both grounded in a different part of the regulations (14 CFR Part 43 governs maintenance, preventive maintenance, and alterations for those aircraft). Historically, that certificate-and-inspection-program model has no direct equivalent in Part 107. This is a deliberate design choice, not an oversight: Part 107 covers an enormous range of small unmanned aircraft, from sub-1-pound camera drones to far larger, more complex platforms, and a single prescriptive inspection program written into the regulation itself would fit some of those aircraft poorly and others not at all.
Manufacturer guidance as the practical standard for a specific airframe
Because Part 107 does not specify aircraft-specific maintenance items, the manufacturer's own guidance for a particular model becomes the most reliable source of what actually needs checking, servicing, or replacing on that airframe over time. A manufacturer that builds and tests a specific aircraft is in the best position to know how its motors wear, how its battery chemistry degrades with cycle count, how its firmware needs updating to fix known issues, and what failure modes have shown up in the field. Following that guidance is how a remote pilot translates the general 107.15 duty ("keep the aircraft safe") into specific, concrete actions for the exact aircraft they are flying.
- Not a regulatory substitute: following manufacturer guidance does not create a new regulation, and skipping a manufacturer recommendation is not, by itself, automatically a violation of any numbered Part 107 rule.
- But directly relevant to 107.15: if ignoring manufacturer guidance results in the aircraft actually becoming unsafe, that outcome can put the remote pilot in violation of 107.15's condition-for-safe-operation requirement, even though the manufacturer's manual itself was never a regulation.
Worked scenario: a fleet operator and battery cycle limits
A commercial operator running a fleet of six mapping drones for a survey company tracks each aircraft's flight battery cycle count against the manufacturer's stated service life — for example, a manufacturer recommendation to retire a battery pack after a certain number of full charge cycles, since capacity and internal resistance degrade in ways that are not always visible from the outside. No Part 107 regulation names that cycle-count number. But by following it, the operator is meeting the 107.15 duty in a concrete, airframe-specific way: a battery well past its stated service life is more likely to fail in a way that puts the aircraft into a condition that is no longer safe, and 107.15 is the regulation that would apply if that failure actually occurred during a flight.
Four common categories of manufacturer maintenance guidance that a remote pilot uses to meet the ongoing 14 CFR 107.15 duty for a specific aircraft.
View Larger| Guidance type | What it typically covers | Why it matters for 107.15 |
|---|---|---|
| Owner and maintenance manuals | Baseline care instructions, cleaning, storage, routine checks | Establishes the manufacturer's expected baseline condition for the airframe |
| Service bulletins and safety notices | Known issues discovered after release, recommended fixes or inspections | Flags conditions the manufacturer has identified as safety-relevant for that model |
| Firmware and software updates | Flight controller logic, safety features, sensor calibration fixes | Outdated firmware can leave known bugs or safety gaps unaddressed |
| Component life limits | Battery cycle counts, propeller wear limits, motor service intervals | Aging components are a common, predictable source of in-flight failure |
Building a Manufacturer-Based Maintenance Routine
A practical process for turning manufacturer guidance into an ongoing routine for a specific airframe.
Locate and read the manufacturer's maintenance or service manual
Identify the specific document for your exact model and hardware revision; manufacturers frequently update these documents as new information becomes available.
Identify every named component life limit
Note any stated limits on battery cycle count, propeller service life, or motor hours, and record the aircraft's current status against each one.
Subscribe to manufacturer notifications
Register the aircraft or sign up for the manufacturer's notification channel so service bulletins, safety notices, and firmware releases reach you directly rather than relying on chance discovery.
Apply firmware and software updates before the next mission, not mid-fleet
Review update release notes for safety-relevant changes and apply them during scheduled downtime rather than immediately before a time-sensitive commercial job.
Retire or service components at their stated life limits
Replace batteries, propellers, or other named components at or before the manufacturer's stated limit, rather than waiting for a visible sign of failure.
| Mistake | Why it happens | Correct understanding | Regulation / source |
|---|---|---|---|
| Believing there is a specific Part 107 regulation number requiring manufacturer maintenance schedules | Manned-aviation courses teach prescriptive Part 43/91 inspection requirements | No Part 107 section names a maintenance schedule; the underlying duty comes from 107.15's general safe-operation standard. | 14 CFR 107.15 |
| Assuming that skipping a manufacturer recommendation is automatically a Part 107 violation | Treating manufacturer guidance as if it were itself a regulation | It is only a violation of 107.15 if the aircraft actually ends up unsafe as a result; manufacturer guidance is a practical tool, not a rule with independent legal force. | 14 CFR 107.15 |
| Ignoring firmware updates because "the aircraft flies fine as-is" | No obvious symptom of the underlying issue the update addresses | Firmware updates often address known safety-relevant bugs that are not otherwise visible during normal operation. | Manufacturer service guidance |
| Not tracking battery cycle counts individually across a multi-aircraft fleet | Batteries get swapped between aircraft, making tracking feel unnecessary | Battery degradation follows the individual battery, not the aircraft it happens to be in on a given flight — cycle counts should be tracked per battery. | Manufacturer service guidance |
Is following the manufacturer's maintenance manual legally required by Part 107?
No specific Part 107 regulation requires following a manufacturer's maintenance manual by name. It is the practical way a remote pilot meets 14 CFR 107.15's requirement to keep the aircraft in a condition for safe operation, but the legal obligation flows from 107.15, not from the manual itself.
Does Part 107 have an equivalent to the Airworthiness Directives (ADs) used for manned aircraft?
No, Part 107 has no formal Airworthiness Directive system for small unmanned aircraft. A manufacturer's service bulletin or safety notice serves a similar practical function — flagging a known issue and a recommended fix — but it is not a legally distinct AD process the way manned aviation uses under Part 39.
Do I have to apply a firmware update before every single flight?
Part 107 does not specify a firmware update timing requirement. Good practice is to review and apply safety-relevant updates during scheduled maintenance windows rather than skipping them indefinitely, while being cautious about applying an untested update immediately before a critical commercial mission.
Test Your Knowledge
Answer the questions below to check your understanding. Every answer can be found in the lesson above.