The Air Canada Express incident — in which a captain apparently suffered a seizure and had to be removed from the cockpit, leaving the first officer to declare an emergency, divert, and execute a solo landing — has focused fresh attention on a procedural and ergonomic challenge that receives relatively little emphasis in standard line training: what happens after touchdown when the handling pilot does not have access to the nose wheel steering tiller. The question is not hypothetical. On a number of regional jets and turboprops common to the North American express carrier market, including the Bombardier CRJ series and the Dash 8 Q400, the tiller is installed only on the captain's side of the cockpit. An FO who has just hand-flown a divert to an unfamiliar airport, likely under significant stress, suddenly faces the problem of maneuvering a transport-category aircraft on the ground with no direct nose wheel steering authority from the right seat.
Tiller configurations vary considerably across the commercial fleet. Wide-body and narrowbody jets operated by major carriers — the Boeing 737 NG and MAX, the 757, 767, 777, 787, and the Airbus A320 and A330 families — typically provide tillers on both sides of the cockpit, giving the PM or PF access to nose wheel steering regardless of seat position. Regional aircraft present a more complicated picture. The CRJ-200, CRJ-700, and CRJ-900 have the tiller positioned only on the left side, a design characteristic that was a known ergonomic limitation even under normal operations when the captain is taxiing and the FO is operating the radio and other systems. On the Q400, a similar single-tiller arrangement places the steering control exclusively within the captain's reach. Differential braking and rudder input can substitute for tiller authority at higher ground speeds, but precise low-speed maneuvering on a narrow taxiway, or into a gate, becomes substantially more difficult without it.
The more immediate question raised by the incident concerns whether the FO is permitted — or expected — to relocate to the left seat when the captain is physically incapacitated. Most major carrier and regional airline operations specifications and standard operating procedures include a captain-incapacitation checklist, and many explicitly address the question of seat transfer. The general framework recognizes that the FO assumes command authority upon captain incapacitation, but the physical act of moving to the left seat depends on several factors: whether the captain can be secured safely in the right seat or in a jump seat position, whether the cockpit layout permits safe movement, and whether doing so is operationally necessary given the specific aircraft's systems layout. On aircraft where critical controls — including the tiller, but also certain engine start systems, nosewheel steering disconnect, or brake system controls — are accessible only from the left side, transitioning seats becomes a more compelling option. Airlines operating single-tiller aircraft should have explicit guidance on this point, and the absence of such guidance in an operations manual represents a gap that this incident will likely prompt some carriers to examine.
The broader training implication here is significant for both regional and business aviation operators. Captain incapacitation is addressed in recurrent simulator training, but the curriculum emphasis typically falls on the aviate-navigate-communicate-declare sequence and the approach and landing itself — not on the subsequent ground handling challenge in an aircraft that was designed around a two-pilot crew where one pilot controls nosewheel steering and the other manages communications. For corporate and charter operators flying aircraft like the Phenom 300, Citation family, or Challenger 300/350 — many of which also feature a single tiller or limited right-seat nose wheel steering authority — the same vulnerability exists. The realistic training scenario should extend past touchdown to include a full taxi-in and gate arrival with the single pilot managing communications, braking, differential thrust, and any available rudder deflection to maintain directional control without the tiller. Incidents like the Air Canada Express event serve as a reminder that emergency procedures are not complete at the point of landing.