What is the maximum airspeed limit when extending the Landing Light?

What is the maximum airspeed limit when extending the Landing Light?

• A. 130 knots
• B. 120 knots
• C. 140 knots
• D. 150 knots

Answer: (A)

Extending a landing light changes the front-end aerodynamics and introduces extra loads on the light housing and wiring. The system is rated to handle these loads up to a maximum indicated airspeed of 130 knots. Exceeding that speed increases dynamic pressure and vibration, which can lead to structural damage, light assembly failure, or electrical faults, and it can affect reliability of the light during critical phases of flight. So, the safe limit is 130 knots IAS; keep the light extended no faster than that. Operating at 120 knots is below the limit and thus safe, while 140 or 150 knots would exceed it and are not permitted.

Extending a landing light changes the front-end aerodynamics and introduces extra loads on the light housing and wiring. The system is rated to handle these loads up to a maximum indicated airspeed of 130 knots. Exceeding that speed increases dynamic pressure and vibration, which can lead to structural damage, light assembly failure, or electrical faults, and it can affect reliability of the light during critical phases of flight. So, the safe limit is 130 knots IAS; keep the light extended no faster than that. Operating at 120 knots is below the limit and thus safe, while 140 or 150 knots would exceed it and are not permitted.