Advisory circular changes for drone operators: compliance im

What “advisory circular changes” mean for compliance — and what they do not

An Advisory Circular explains how an aviation authority expects people to approach a rule or standard. It can describe a process, set out useful records and show an accepted way to prove compliance.

1. DJI Agras T100 100 L
2. DJI Agras T70P 70 L
3. XAG P150 70 L
4. DJI Agras T55 50 L
5. XAG P100 Pro 50 L
6. DJI Agras T50 40 L

Spray tank capacity (L)

Model	Value
DJI Agras T100	100 L
DJI Agras T70P	70 L
XAG P150	70 L
DJI Agras T55	50 L
XAG P100 Pro	50 L
DJI Agras T50	40 L

Sources: ag.dji.com, ag.dji.com, xa.com, ag.dji.com, xa.com, ag.dji.com

It does not replace the rule itself. That distinction matters when an operator rewrites manuals after an AC revision.

Transport Canada states the point directly in AC 901-001. An AC provides information and guidance to help the public comply with regulations and standards. It does not change, create or amend regulatory needs, permit deviations or set minimum standards.

The FAA takes the same broad approach in AC 137-1B. The circular is not mandatory and is not a regulation. Applicable regulations still control.

Guidance can still change the work

An AC revision may not change the law, but it can alter the most practical parts of compliance. It may change the accepted route through an application or make the expected evidence clearer.

That can affect:

• application files;
• operations manuals;
• training notes;
• declarations and supporting records;
• document checks before an inspection;
• staff duties and approval steps.

The key question is not simply, “Has the rule changed?” Ask which part of the operator’s compliance file the new guidance touches.

For an agricultural operator, that may be the certificate application path in AC 137-1B. For an operator using a small UAS, AC 107-2A is an official reference for work under 14 CFR part 107. In Canada, AC 901-001 deals with safety assurance declaration and Pre-Validated Declaration processes.

These documents cover different systems and jurisdictions. They should not be merged into one generic drone checklist.

An AC is not a waiver

Operators must not treat guidance as permission to depart from a rule. That remains true even when an AC describes an accepted means of compliance.

AC 137-1B says it describes an acceptable means, but not the only means, of applying for an Agricultural Aircraft Operator Certificate. If an applicant chooses that means, the applicant must follow it in all important aspects.

That wording creates a practical choice. An operator can use the route in the circular, but should then build the application and records around that route. Picking isolated parts while ignoring linked steps may weaken the file.

Any permission to depart from a regulatory provision must come through the proper legal or agency process. It does not arise merely because an AC discusses an exemption.

Agricultural UAS operators: how AC 137-1B frames an acceptable means

AC 137-1B covers the certification process for agricultural aircraft operators. It describes an acceptable means for applying for an Agricultural Aircraft Operator Certificate under 14 CFR part 137.

The circular also addresses safety practices. Its stated scope includes agricultural aircraft operations using a UAS.

That makes it a core process document for a US operator building a spray business around unmanned aircraft. Our separate guide to FAA Part 137 for agricultural drones covers the wider regulatory setting. The AC should be read within that setting, not as a substitute for it.

The certificate process is the main workflow

The certification process gives an operator a useful file structure. That structure can have a named owner, a document list and an internal review point.

When the AC changes, compare the revised text with the operator’s existing process. Do not limit the review to the flight manual. The affected material may sit in an application tracker, a staff briefing or an inspection pack.

A practical review should ask:

• Does the application file follow the route described in the AC?
• Does the application contain the documents expected?
• Can staff show how each document meets the relevant rule or exemption?
• Is the inspection pack complete?
• Do records match the proposed work?

These are process questions. They do not turn the AC into law, but they help an operator show organised compliance with the law.

UAS work calls for added knowledge

AC 137-1B says that a part 137 operator wishing to use a UAS should have added knowledge of the authorities and processes named in the circular. These include the 14 CFR part 11 exemption process and 14 CFR part 107.

The circular also refers to Public Law 112-95, the FAA Modernization and Reform Act of 2012, Section 333, and FAA Order 8900.1, Volume 16, Unmanned Aircraft Systems.

For a farm-drone firm, the practical impact is a training and document-control task. Staff handling the certificate file need to know which authority applies to each part of the proposed operation. Pilots alone should not hold all that knowledge.

A drone spraying business may split work between pilots, loading staff, managers and people who maintain the compliance file. The AC review should therefore reach everyone whose records feed the application.

Exemptions belong in the file

AC 137-1B notes that a UAS operator may be unable to comply with some sections of part 137. Other sections may not apply to UAS work.

The circular says an operator proposing to use a UAS must receive a grant of exemption covering the appropriate sections before the certification process reaches the demonstration and inspection phase. It also says the operator must give the certification team a copy of the exemption.

That is a clear document-control point. The exemption should not sit only in an email account or a manager’s personal folder.

The compliance file should show:

• the regulatory sections addressed by the exemption;
• the copy supplied to the certification team;
• any conditions tied to that exemption;
• where those conditions appear in training and operating documents;
• who checks them before work starts.

This does not mean the AC grants the relief. It explains where the relief fits into the certification process described by the FAA.

Safety guidance should reach field procedures

AC 137-1B addresses safety practices as well as the application route. An operator should therefore compare a revision against both office records and field documents.

For spray work, that may include the procedures used to brief staff, prepare the aircraft and control the site. Our guide to how agricultural drone spraying systems work provides technical context for the equipment side. Regulatory proof still needs to remain tied to the relevant authority and approved operating basis.

Avoid turning broad AC wording into unsupported local rules. Record the source of each procedure so staff can distinguish a regulatory need, an exemption condition and an internal safety choice.

Small UAS operations: AC 107-2A as a reference point

AC 107-2A is titled “Small Unmanned Aircraft System (Small UAS)”. The FAA describes it as guidance that promotes compliance with 14 CFR part 107.

Its stated areas include remote pilot certification, aircraft registration and marking, aircraft airworthiness, and small UAS operations in the National Airspace System.

That scope makes the circular a useful index for an operator’s small-UAS file. Training records may map to remote pilot certification guidance. Aircraft records may map to registration, marking and airworthiness guidance. Operating procedures may map to the operational material.

The supplied research does not set out a summary of substantive changes within AC 107-2A. It would therefore be unsafe to claim that it introduced a named flight limit, new permission or fresh operating method.

The sound compliance response is narrower. Use AC 107-2A as an official FAA reference point, then compare the full document with the operator’s own manuals and records. Do not infer a change merely from a headline or secondary summary.

Keep part 107 and part 137 references distinct

A farm operator may use part 107 material and part 137 material within the same compliance system. That does not make the documents interchangeable.

AC 107-2A promotes compliance with part 107 across its stated small-UAS subjects. AC 137-1B deals with the Agricultural Aircraft Operator Certificate process and agricultural safety practices, including UAS work.

The operator’s document register should state why each circular is present. A short “applies to” note can prevent staff from citing the wrong source during an application or inspection.

Canada AC 901-001: declarations and document duties

Transport Canada’s AC 901-001 has the subject “Remotely Piloted Aircraft Systems Safety Assurance Declaration and Pre-Validated Declaration Processes”. Its effective date is 2025-04-01.

The circular explains who is expected to make safety assurance declarations. It also covers the expected documents linked to a declaration and the declarant’s duties.

This is a strong example of an AC changing the shape of compliance work without changing the underlying standard. The guidance tells affected parties how the declaration process is expected to work. The technical basis still sits elsewhere.

The AC does not contain the technical standard

AC 901-001 says it does not describe the specific aspects or technical needs of CAR Standard 922. Declarants state that a specific RPAS meets certain sections of that standard.

Operators should keep that distinction visible in their files. The circular can guide the declaration process, but it should not be cited as the technical proof that the system meets CAR Standard 922.

A clean file should separate:

• the declaration or Pre-Validated Declaration process;
• evidence supporting the declaration;
• the relevant sections of CAR Standard 922;
• the identity and duties of the declarant;
• later records linked to the declared system.

The exact content must come from the applicable standard and the operator’s approved basis. AC 901-001 helps organise the process around that material.

Responsibility needs a named owner

The circular defines the declarant as the person or organisation making a safety assurance declaration to the Minister. It says the declarant takes responsibility for the RPAS meeting the relevant CAR 922 standards.

That makes document ownership important. A declaration should not be treated as a form that any staff member can sign after a quick review.

The operator should identify who acts as applicant, who becomes the declarant and who controls the supporting evidence. Internal titles should match the duties described in the circular.

Operator action checklist when an AC is revised

Start with the revision itself. Confirm the circular’s subject, audience and stated purpose before changing any manual.

Then map the guidance to the operator’s records:

• Identify the governing rule or standard. Keep the regulation separate from the AC that explains an accepted route.
• Mark each affected document. Include applications, manuals, training notes, declarations, exemptions and inspection packs.
• Check chosen means of compliance. If using the route in AC 137-1B, follow it in all important aspects.
• Verify legal relief. Do not treat AC wording as a waiver or exemption.
• Update staff training. Teach the process changes to managers and document owners as well as pilots.
• Name each record owner. Make clear who drafts, checks, signs, submits and stores each item.
• Retain the evidence chain. A declaration or application should point to the records supporting it.
• Record the review. Note what changed, what did not change and why no action was needed where that is the result.

The final test is simple: can the operator show which rule applies, which guidance was used and which records prove the claim?

That is the real impact of an Advisory Circular update. It rarely starts and ends with a new line in a flight manual. It changes how an operator explains, organises and proves compliance—while the governing regulation or standard remains the authority.