What the Multi-Engine Rating Is

The multi-engine rating qualifies you to fly aircraft with more than one engine. Since every airliner has at least two engines, it is an essential step for anyone aiming at a commercial flight deck, and it introduces a set of skills with no equivalent in single-engine flying.

More than an extra engine

It would be a mistake to think a twin is just a single with a spare engine. The rating is really about managing what happens when one of those engines fails — controlling an aircraft that suddenly wants to yaw and roll, and deciding quickly whether to continue or stop. That asymmetric handling is the heart of the rating.

Where it fits

For career pilots the multi-engine rating is usually trained together with the instrument rating and commercial licence, because airlines need pilots who can operate multi-engine aircraft on instruments. See how it slots into the wider path in our how to become an airline pilot guide.

Single-Engine Versus Twin

Stepping from a single to a twin changes the aircraft's systems, performance and, above all, the consequences of an engine failure.

More systems to manage

Twins have two of many things — two throttles, two propeller controls, two fuel systems — and often retractable gear and more powerful engines. The cockpit workload rises, and good organisation and checklist discipline become even more important than before.

The failure case changes everything

In a single, an engine failure means a forced landing. In a twin, the remaining engine can keep you flying — but only if you control the aircraft correctly and manage performance carefully. That trade-off, more capability in exchange for more complexity, defines twin flying.

Why Aircraft Have Two Engines

The obvious appeal of a second engine is redundancy, but the reality is more nuanced and is central to what the rating teaches.

Redundancy with conditions

A second engine means the failure of one need not end the flight, which is why airliners are multi-engine. But a light twin on one engine has greatly reduced performance and can be demanding to control, so the redundancy comes with conditions the pilot must understand and respect.

Performance is the catch

Losing half your engines does not mean losing half your performance — the loss of climb capability is far greater than that. Understanding this counter-intuitive truth, and flying the aircraft accordingly, is one of the most important lessons of the rating.

Asymmetric Flight and Engine-Out Handling

The defining skill of the multi-engine rating is controlling the aircraft when one engine fails and the other keeps producing thrust — asymmetric flight.

The yaw and roll

With thrust on one side only, the aircraft yaws and rolls toward the dead engine. You counter this with rudder and a small bank toward the live engine, identifying which engine has failed and securing it. Done promptly and correctly, control is maintained; done poorly, the situation deteriorates quickly.

Identify, verify, feather

The trained response — identify the failed engine, verify it, and feather its propeller to reduce drag — is drilled until it becomes automatic. This calm, methodical handling of a serious failure is exactly the airmanship airlines value.

Understanding Vmc

One number dominates multi-engine flying: Vmc, the minimum control speed with one engine inoperative. Understanding it is fundamental to flying a twin safely.

What Vmc means

Below Vmc, there is not enough airflow over the rudder to counteract the yaw from the asymmetric thrust, and the aircraft can lose directional control. Staying above Vmc after an engine failure is therefore critical, especially at low speed near the ground.

Respecting the speed

Much of the rating teaches you to manage speed and configuration so that an engine failure never leaves you below Vmc in a dangerous situation. It is a sobering, important part of becoming a twin pilot, and it sharpens your respect for speed margins generally.

The Critical Engine

On many twins, one engine matters more than the other if it fails — the so-called critical engine.

Why one engine is worse to lose

Due to the way propellers turn and the resulting airflow, the failure of one particular engine produces a stronger yawing tendency and a higher Vmc than losing the other. That engine is termed the critical engine, and its failure is the more demanding case to handle.

Training for the worst case

Instruction emphasises the critical-engine failure precisely because it is the harder scenario. Learning to handle the worst case means the easier failures become straightforward, which is a sound principle throughout aviation training.

Performance: Accelerate-Stop and Climb

Multi-engine flying introduces performance concepts that single-engine pilots rarely consider in such detail.

Accelerate-stop and accelerate-go

Before takeoff you consider whether, if an engine fails at a given point on the runway, you can stop in the remaining distance or safely continue. These accelerate-stop and accelerate-go calculations mirror the decision-making used in airline operations and instil a planning discipline you carry forward.

Single-engine climb

A light twin's ability to climb on one engine is limited and depends heavily on weight, altitude and temperature. Understanding and respecting single-engine climb performance is essential, and it teaches the performance awareness that airline flying demands every day.

Drag, Feathering and Configuration

Managing drag is central to keeping a twin flying after an engine failure, and the propeller is the key.

Feathering the propeller

A windmilling dead propeller creates enormous drag. Feathering it — turning the blades edge-on to the airflow — dramatically reduces that drag and is what makes continued flight on one engine possible. Prompt, correct feathering is a life-saving skill.

Clean configuration

Retracting the gear and flaps and flying at the right speed minimises drag and gives the remaining engine the best chance of maintaining height. Configuration management under pressure is a core part of the rating and a habit that serves you throughout your career.

Requirements for the Rating

The multi-engine rating is unusual in that it is based on demonstrated proficiency rather than a fixed number of hours under the FAA.

Trained to proficiency

There is no minimum hour requirement for the FAA multi-engine rating; you train until you can fly the aircraft and handle engine failures safely, then pass a checkride. In practice this takes a number of focused hours, but the emphasis is on competence, not clocking time. EASA folds the rating into structured commercial training with its own requirements.

Often combined with the IR

Career pilots usually earn the multi-engine rating together with the instrument rating as a multi-engine instrument rating, because airlines need both. Training them together is efficient and reflects how the skills are used.

The Multi-Engine Checkride

The rating ends with a practical test focused heavily on engine-failure handling at every stage of flight.

What is tested

Expect to demonstrate normal twin operations plus engine failures on the ground, on takeoff, in the climb, in the cruise and during approach, along with single-engine handling and a single-engine approach. The examiner wants to see prompt identification, correct control and sound decisions.

Calm, methodical handling

Success comes from a calm, drilled response rather than speed alone. Candidates who have practised the failure drills until they are automatic handle the checkride well, because the procedures carry them through the pressure.

Multi-Engine Instrument and Commercial

For airline-bound pilots, the multi-engine rating rarely stands alone; it combines with instrument and commercial training into the package airlines expect.

The MEIR package

A multi-engine instrument rating qualifies you to fly twins on instruments, which is the standard requirement for airline operations. Holding it signals that you can operate complex aircraft in the conditions airlines fly in.

Commercial multi-engine

Completing the commercial licence in a multi-engine aircraft demonstrates higher-standard handling of a twin and is a strong position from which to seek airline employment. See how the licences relate in our ATPL vs CPL guide.

Why Airlines Require It

From an airline's perspective, the multi-engine rating is simply a prerequisite, because their aircraft are all multi-engine.

The minimum expectation

No airline will employ a pilot who cannot operate multi-engine aircraft, so the rating is a baseline rather than a differentiator. What sets candidates apart is the quality of their multi-engine and turbine experience and how they perform in the selection process.

Foundation for the type rating

The asymmetric handling, performance awareness and systems management the rating teaches are exactly the skills your eventual jet type rating will build upon. Learning them well now makes the step up to an airliner far smoother.

Tips for the Rating

The multi-engine rating is short but intense, and a focused approach makes it efficient and rewarding.

Master the memory drills

Engine-failure responses must be automatic, so rehearse the identify-verify-feather flow until you can perform it without thinking. Chair-flying the drills between lessons is free and highly effective.

Understand the numbers

Know your Vmc, your single-engine climb performance and your aircraft's limitations cold. Strong understanding of the performance numbers turns the rating from a memory exercise into genuine competence, and tools like our aviation calculators help you study the underlying figures.

Staying Proficient in a Twin

Like instrument flying, multi-engine handling is a perishable skill, and the engine-failure drills in particular fade without practice. Holding the rating is not the same as being ready to use it safely.

Recency matters

If you do not fly twins regularly, your asymmetric handling and your memory drills will dull, and an engine failure is the worst possible moment to discover that. Pilots who fly twins occasionally are wise to refresh the failure drills with an instructor before carrying passengers, and to rehearse the procedures mentally between flights.

Currency into the airlines

This emphasis on recency is exactly the mindset airline operations are built around, where pilots undergo recurrent simulator checks every few months precisely to keep emergency handling sharp. Building the habit of staying current in a light twin prepares you for the professional discipline that defines an airline career, where proficiency is never taken for granted.

Light Twins Versus Airliners

The twin you train in is small and simple compared with an airliner, yet the principles you learn transfer directly to the largest jets. Understanding the link motivates the effort.

Same principles, bigger scale

An airliner manages an engine failure with far greater performance margins, sophisticated systems and a second pilot to share the workload, but the underlying physics — asymmetric thrust, minimum control speed, the need to reduce drag and maintain control — are identical to those in a light twin. Master them in the trainer and you understand them in the jet.

Why training in a light twin matters

A light twin is, in some ways, less forgiving than an airliner because it has so little spare performance on one engine. Learning to handle that demanding environment builds precise, disciplined habits that make the better-performing airliner feel manageable. The respect for performance and speed you develop here lasts your whole career.

Engine-Failure Drills in Detail

The heart of multi-engine training is the engine-failure drill, practised until it is automatic. It is worth understanding what that drill actually involves.

The sequence

When an engine fails, you first maintain control with rudder and a slight bank toward the live engine, then maintain a safe speed, then identify the failed engine — “dead leg, dead engine” — verify it by closing the corresponding throttle, and finally feather its propeller and secure it. Only then do you address the cause and plan your next move.

Why it must be automatic

An engine failure on takeoff gives you very little time, so the drill has to be reflexive rather than considered. This is why instructors repeat it relentlessly and why chair-flying the sequence at home is so valuable. The same disciplined, drilled response to emergencies is exactly what airlines train and test in the simulator throughout a career.

Cost, Time and Next Steps

Because it is trained to proficiency, the multi-engine rating is usually one of the shorter and more affordable additions to your qualifications, though twin aircraft cost more per hour.

Budgeting

The higher hourly cost of a twin is offset by the relatively small number of hours the rating typically takes. Combining it with the instrument rating, as most career pilots do, is the efficient approach. Plan it within the overall sequence in our how to become an airline pilot guide.

What comes next

With multi-engine, instrument and commercial qualifications in hand, the next milestones are building the hours toward the airline licence — often by working as a flight instructor — and preparing for airline selection.

Frequently Asked Questions