Pilot Medical Certificate Limitations: Types, Causes and How They Are Lifted

Am I at risk of receiving limitations or restrictions on my medical certificate? It is one of the most frequent questions at the AME’s office, and the short answer is: yes, it is possible — but it should not be seen as a failure. Pilot medical certificate limitations exist precisely so that pilots can keep exercising their licence privileges in maximum safety conditions, when they have a condition that increases the risk of in-flight incapacitation but is otherwise compatible with flight provided those restrictions are observed. This article explains, in plain language for EASA pilots, what a limitation means, what types exist, when and by whom they are imposed, how they are lifted, and what you can concretely do to prevent them.

What a limitation on a pilot medical certificate means

Per Part-MED MED.B.001 and the related AMC1, a limitation (“limitation”) is an official mention printed on the pilot medical certificate, which conditions the exercise of the related licence privileges on observance of that limitation. A limitation can be operational (it dictates the conditions under which you may fly), technical (optical correction, prostheses, environmental conditions) or temporal (it shortens the validity of the certificate). Important: a limitation is not a sanction. It is a solution rooted in the ICAO principle of flexibility, by which the AME or the medical assessor (licensing authority) allows you to continue flight activity provided you observe that limitation.

In practice, limitations appear when the medical data show a temporary or long-term condition that increases the risk of in-flight incapacitation for medical reasons, but where that risk remains below the critical threshold above which suspension or revocation of the medical certificate would be required. They are coded with three letters (e.g. OML, OSL, OPL, VDL, VML, HAL, RXO, TML) and appear on the back of your certificate alongside the validity date.

Operational pilot medical certificate limitations: OML, OSL and OPL

The three best-known pilot medical certificate limitations are operational. They restrict how a pilot may exercise the privileges of the licence, without prohibiting flight altogether.

The three operational pilot medical certificate limitations under EASA Part-MED.

OML (Operational Multi-Pilot Limitation) applies to class 1 and means that the pilot may exercise the privileges of the licence only in a multi-pilot crew, with a fully qualified co-pilot for the aircraft type. It is the typical limitation post-cardiovascular event, after interventional procedures or diagnoses that increase the risk of sudden in-flight incapacitation. OML may be imposed (directly or upon the AME’s proposal) and lifted exclusively by the medical assessor of the competent authority. Note that responsibility for implementing this limitation rests with the air operator, through the development and implementation of specific procedures (for example, the procedure must include the requirement that two pilots each holding OML may not be scheduled in the same crew, or some operators may choose not to assign the OML pilot to the pilot-in-command position).

OSL (Operational Safety Pilot Limitation) applies to class 2 and LAPL. The pilot may fly only if a second pilot qualified for the aircraft type is on board, occupying a seat in an aircraft with dual controls. It is used in cases where the AME identifies a residual risk incompatible with solo flight but acceptable in a context with a safety pilot.

OPL (Operational Passenger Limitation) applies to class 2 and LAPL. The pilot may not carry passengers during flight. This is the typical limitation for cases in which the medical risk is acceptable for the pilot but unacceptable for passenger safety (for example, certain mild cardiovascular conditions or periods of adaptation to a new therapeutic regimen).

Common technical limitations: vision, hearing and prosthesis

The second major category of pilot medical certificate limitations concerns sensory functions and prostheses. They are usually less restrictive than the operational ones, but they must be observed strictly — ignoring them in flight means, formally, exercising the privileges of the licence only on condition that the respective limitation is observed.

• VDL (Visual Distance Limitation) — mandatory optical correction for distance vision. The pilot may fly only while wearing the prescribed lenses.
• VML / VNL — optical correction for intermediate / near vision (useful for reading charts, instruments and the EFB).
• CCL — valid only with contact lenses (in the absence of an alternative, with a backup pair available on board).

Note that the pilot is responsible for periodic visits to the ophthalmologist for re-evaluation of their condition, and if the situation requires it must immediately replace their glasses when so instructed. The pilot is responsible for immediately reporting to the AME the moment they were first prescribed glasses, and for visiting the AME so the medical certificate is updated with the corresponding limitation. In all three vision-related limitation situations (VDL, VNL or CCL) it is mandatory for the pilot to have an equivalent backup pair of glasses immediately at hand.

• VCL — valid only for daytime flight (night flight is prohibited).
• HAL (Hearing Aid Limitation) — valid only when the pilot wears the prescribed hearing aids.
• APL — valid only with the approved prosthesis (e.g. an upper-limb prosthesis adapted for aircraft controls).
• RXO — requires an additional ophthalmological examination at every revalidation.
• TML (Time-related Limitation) — shortens the validity of the certificate compared to the standard duration, for monitoring an unstable condition.
• SIC — requires additional medical examinations at specified intervals, with reporting to the authority.

Common causes of pilot medical certificate limitations

Limitations do not appear at random. They are triggered by medical conditions that, per Part-MED, generate a quantifiable risk of in-flight incapacitation or progressive degradation of sensory abilities. In Romanian AMEs’ practice, the most frequent causes are:

• Vision — myopia, hypermetropia, astigmatism, presbyopia after age 40 — generate VDL, CCL, VML or VNL. Post-refractive surgery cases may require RXO; it is recommended to discuss with the AME before deciding on surgical correction of a refractive error.
• Cardiovascular — hypertension with high cumulative cardiovascular risk, post-myocardial infarction, post-coronary revascularisation, arrhythmias requiring treatment. These cases typically lead to OML (class 1) or OSL/OPL (class 2 / LAPL).
• Hearing — moderate hearing loss correctable with hearing aids generates HAL.
• Metabolic — diabetes mellitus on medical therapy frequently generates OML and TML.
• Neurological — certain types of severe migraine or a history of explained syncope may impose TML and SIC for monitoring.

For more details on chronic conditions and their compatibility with the medical certificate, see our previous article on chronic conditions and the pilot medical certificate. There we discussed in detail hypertension, allergies, asthma, thyroid pathology and diabetes.

How a pilot medical certificate limitation is lifted

A limitation is, in most cases, not definitive. If the condition that generated it stabilises, disappears or is better controlled over time, the limitation can be modified or fully lifted at a later examination. The typical process follows five steps.

The typical flow by which a pilot medical certificate limitation is lifted.

Who decides on lifting depends on the type of limitation. For OML at class 1, the lifting decision belongs exclusively to the medical assessor of the licensing authority’s aeromedical section, upon AME proposal. For OSL/OPL at class 2 and LAPL, the AME or the AeMC may decide directly, in consultation with the authority when deemed necessary. For technical limitations (VDL, VML, HAL etc.), lifting is generally not possible as long as the sensory deficiency exists — they remain on the certificate as a permanent codification of the mandatory correction.

How to prevent pilot medical certificate limitations

Many pilot medical certificate limitations can be avoided or attenuated if pilots approach the aeromedical examination prepared. Here is what works in practice:

• Schedule the examination at least 45 days before the certificate’s expiry. You will have time for specialist reports, treatment adjustments or a second opinion, without the risk of running out of validity.
• Bring complete documentation: recent medical letters (last year), the full medication list with dosages, ECGs and relevant analyses, plus the ophthalmologist’s report if you wear corrective lenses.
• For hypertension: monitor blood pressure at home for 1–2 weeks before the exam and optimise your therapeutic regimen with your cardiologist. A single elevated reading at the surgery can generate a temporary limitation.
• For vision: if you have recently changed your prescription, arrange a recent re-evaluation. Outdated data can lead to unnecessarily strict VDL or VML.
• Discuss any new medical condition proactively with your AME, even between examinations — Part-MED MED.A.020 obliges you, in any case, to report significant medical changes.
• Request a preliminary evaluation before an initial medical exam if you have a complex medical history. Many unnecessary limitations occur because the file is not complete at the time of examination.

Frequently asked questions about pilot medical certificate limitations

Is a limitation permanent? Not necessarily. Operational limitations (OML, OSL, OPL) and temporal ones (TML, SIC) can be lifted if the condition stabilises or evolves favourably. Sensory limitations (VDL, VML, HAL) remain on the certificate as long as the deficiency persists.

Can I fly commercially with OML on my certificate? Yes, but exclusively in a multi-pilot crew. Single-pilot commercial operations (for example on small cargo aircraft) are not permitted. Most major airlines accept pilots with OML provided crew planning is appropriate.

Does the limitation appear written on the certificate? Yes. The codes (OML, OSL, OPL, VDL etc.) are explicitly inscribed in the “Limitations” section of the certificate, alongside the issue and validity dates.

Can I challenge a limitation? There is a re-examination procedure. You can request a second opinion or an additional evaluation through the licensing authority’s aeromedical section. If new medical data emerge that change the picture, the initial decision may be reconsidered.

Conclusion

Pilot medical certificate limitations are less an obstacle and more a tool for balancing individual fitness with operational safety. The EASA Part-MED system is built to preserve a pilot’s medical fitness for flight wherever the residual risk can be managed. Knowing the codes, understanding the decision flow and preparing the documentation before the examination significantly reduce the likelihood of receiving an avoidable limitation — or, if one already exists, accelerate its lifting.

How LaMed Clinic helps with your pilot medical certificate limitations

The article provides a general framework, but every case has particularities: the type of condition, the age of the diagnosis, the therapeutic regimen, the target certificate class. For these specific situations LaMed Clinic exists — a point of contact where you can get concrete answers, applied to your case, from a team that works daily with Part-MED and PAC-MED.

Specifically, through the LaMed Clinic contact form you can get:

• An assessment of the probability of receiving a limitation based on your medical history and the certificate class you are aiming for.
• A personalised list of the documents needed to avoid an avoidable limitation (cardiologist, ophthalmologist, ENT specialist report etc., in the format required by the licensing authority).
• Support for lifting an existing limitation — what documents you need for re-examination, how to build the file for the medical assessor.
• Scheduling at AME / AeMC with a realistic calendar for revalidation, renewal or initial examination.
• Consultancy on complex cases — diabetes on treatment, post-cardiovascular event, neurological conditions — where the decision depends on correct risk classification.

All requests are handled confidentially. You do not need to be an existing patient — a single message via the contact page is enough to get the guidance you need.

Official sources and references

1. EASA — Acceptable Means of Compliance (AMC) and Guidance Material (GM) on the medical certification of pilots and medical fitness of cabin crew (Decision 2011/015/R, with subsequent amendments).

2. EASA — Easy Access Rules for Medical Requirements (Part-MED), consolidated online publication.

3. EASA — AMC2 MED.B.001 — Limitations to medical certificates.

4. UK CAA — Medical Certification Limitations Table v11.1 (January 2025) — official list of all limitation codes.

5. Romanian aeromedical authority — PAC-MED, edition 1 (2026) — Civil Aviation Procedure on medical certification.

6. Romanian aeromedical authority — Official Aviation Medicine page (list of authorised AMEs/AeMCs, contact for the aeromedical section).

7. EUR-Lex — Regulation (EU) No 1178/2011 (consolidated English version).

Disclaimer

This material is informative and educational in nature. It does not constitute medical advice, an aeromedical opinion or an official interpretation of Part-MED. The decision regarding fitness to fly and the imposition or lifting of a limitation belongs exclusively to an authorised AME / AeMC and, where applicable, to the licensing authority’s aeromedical section. EASA regulations are updated periodically; always check the version in force at the time of examination.