Understanding LAHSO Clearances: Rules and Considerations for Pilots

Land and Hold Short Operations (LAHSO) is a crucial procedure adopted in modern airport operations to enhance safety and efficiency. This procedure involves landing an aircraft on a runway and holding it short of the intersection with another runway. This article will delve into the rules and considerations for pilots receiving a LAHSO clearance, providing a comprehensive guide to ensure safe and efficient operations.

What is a LAHSO Clearance?

A LAHSO clearance is issued to an arriving aircraft to land on a runway and hold short of a specified holding point, which is often the intersection with another runway. This clearance is typically given to reduce the potential for runway incursions and improve overall airport traffic flow. Pilots must strictly comply with the clearance to ensure safety and prevent any collisions with other aircraft.

Rule for Receiving a LAHSO Clearance

The primary rule for pilots receiving a LAHSO clearance is to land and stop before reaching the holding point specified in the clearance. This rule is crucial and must be adhered to without deviation. The runway holding position is marked by a series of runway holding position markings, which are typically shown with a painted word or symbol LAHOS (Land and Hold Short Operations).

Decision-Making Criteria for Accepting or Rejecting a LAHSO Clearance

While a LAHSO clearance is designed to optimize airport operations, pilots have the final say in whether to accept or reject the clearance based on their assessment of the situation. If the crew determines that the available runway is sufficient and the landing can be safely executed with a stop before the clearance limit, the clearance can be accepted.

To comply with the LAHSO clearance, pilots must ensure several key factors: The runway length and conditions are suitable for a safe landing and stop. Adequate visual references are available to assist in the approach and landing. The aircraft's performance (e.g., speed, weight, and brakes) is within acceptable limits. There are no adverse weather or runway conditions that could compromise safety (e.g., slippery runway surfaces, crosswinds).

Pilots can also reject a LAHSO clearance if the crew deems it unsafe based on their judgment. This can be due to various factors, such as poor weather conditions, runway or taxiway malfunctions, or even crew factors, such as a copilot having a bad day.

Case Study: Rejecting a LAHSO Clearance

One example of rejecting a LAHSO clearance involves a situation where a crew member was experiencing personal issues. In such instances, pilots are expected to prioritize safety and make the necessary decisions to ensure the operation is safe and controlled.

For instance, if the copilot was subject to personal circumstances that might affect their performance, such as being unwell or experiencing personal emergencies, the captain might decide to reject the LAHSO clearance to ensure a safe landing and a subsequent takeoff without any potential risks.

Similarly, if there are adverse weather conditions, such as snow, ice, or extreme crosswinds, the runway may become slippery, which can affect the aircraft's stopping capability. In such cases, the pilots may reject the LAHSO clearance and instead opt for a full stop on the runway, ensuring all safety measures are met.

Conclusion

LAHSO clearances are an essential tool in modern aviation, designed to improve safety and operational efficiency. However, pilots must remember that the ultimate responsibility lies with them to ensure that the landing and approach are conducted safely. By adhering to the rules and considering the factors that might affect the decision to accept or reject a LAHSO clearance, pilots can make informed decisions that protect both the crew and passengers.

Jet safe and happy flights!