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LET L-410/420

From SKYbrary Wiki

Name L-410/420
Manufacturer LET
Body Narrow
Wing Fixed Wing
Position High wing
Tail Regular tail, high set
WTC Light
Type code L2T
Engine Turboprop
Engine count Multi
Position (Front) Wing leading mounted
Landing gear Tricycle retractable
Mass group 3

Manufacturered as:

LET L-420 Turbolet
LET L-410 Turbolet
LET Turbolet

LET L-410/420

LET L-410/420 LET L-410/420 3D


Twin turboprop commuter airliner. First flight in 1969, in service since 1971 (L-420 since 1998). Czech successful commuter aircraft development. Built in a few versions. L-420 improved version with more powerful engines and higher weight. Also used by military as light tactical and utility transport aircraft. AYRES was owner of LET from 1998 until 2013.

Since 2013 the manufacturer Aircraft Industries s.a. is owned by the Russian industrial holding UGMK. The aircraft is still in production with the current model being L 410 UVP-E20 with an EASA/FAA type certificate issued as the L 410 NG.

L-420: MTOW 6,600kg14,550.509 lbs <br />6.6 tonnes <br />.

Technical Data

Wing span 20 m65.617 ft <br />
Length 14.4 m47.244 ft <br />
Height 5.8 m19.029 ft <br />
Powerplant Variants:
  • 410: 2 x 750 SHP Motorlet Walter M 601E turboprops with five blade propellers.
  • 420: 2 x 775 SHP Motorlet Walter M 601F turboprops with five blade propellers.
Engine model Motorlet M-601

Performance Data

Take-Off Initial Climb
(to 5000 ft)
Initial Climb
(to FL150)
Initial Climb
(to FL240)
MACH Climb Cruise Initial Descent
(to FL240)
(to FL100)
Descent (FL100
& below)
V2 (IAS) 85 kts IAS 115 kts IAS 160 kts IAS 160 kts MACH TAS 205 kts MACH IAS 200 kts IAS kts Vapp (IAS) 85 kts
Distance 445 m ROC 1000 ft/min ROC 500 ft/min ROC ft/min ROC ft/min MACH ROD ft/min ROD 800 ft/min MCS kts Distance 240 m
MTOW 64006,400 kg <br />6.4 tonnes <br /> kg Ceiling FL210 ROD ft/min APC A
WTC L Range 744744 nm <br />1,377,888 m <br />1,377.888 km <br />4,520,629.925 ft <br /> NM

Accidents & Serious Incidents involving L410

  • L410, Dubrovnik Croatia, 2018 (On 29 November 2018, a Let 410 landed on a temporarily closed section of the runway at Dubrovnik after a visual approach in benign weather conditions. The Investigation found that the flight crew had not carried out a sufficient pre-flight review of current and available information about a major multi-phase runway reconstruction there which they were familiar with. The opportunity for better advance and real time communication with aircraft operators and their flight crew and the benefit of the recommended ‘X’ marking at the beginning of any temporarily closed part of a runway, omitted in this case, was noted.)
  • L410, Isle of Man, 2017 (On 23 February 2017, a Czech-operated Let-410 departed from Isle of Man into deteriorating weather conditions and when unable to land at its destination returned and landed with a crosswind component approximately twice the certified limit. The local Regulatory Agency instructed ATC to order the aircraft to immediately stop rather than attempt to taxi and the carrier’s permit to operate between the Isle of Man and the UK was subsequently withdrawn. The Investigation concluded that the context for the event was a long history of inadequate operational safety standards associated with its remote provision of flights for a Ticket Seller.)
  • L410, vicinity Lukla Nepal, 2017 (On 27 May 2017, a Let 410 attempting to complete a visual approach to Lukla in rapidly deteriorating visibility descended below threshold altitude and impacted terrain close to the runway after stalling when attempting to climb in landing configuration. The aircraft was destroyed by the impact and two of the three occupants fatally injured. The Investigation concluded that the Captain had lost situational awareness at a critical time and had been slow to respond to the First Officer’s alert that the aircraft was too low. Safety Recommendations included the establishment of an independent and permanent Air Accident Investigation Agency.)