LET L-410 UVP-E Turbolet — Technical Documentation and Engineering Dossier

This living collection consolidates surviving primary-source technical documentation for the LET L-410 UVP-E Turbolet family — one of the most operationally significant short-haul twin-turboprops of the Soviet and post-Soviet era. From regional commuter routes across Siberia to mountain strips in Central Europe, the L-410 UVP-E earned its reputation through rugged STOL capability, twin-turboprop reliability, and a design envelope that tolerated extremes from −50 °C to +50 °C.

This dossier documents the UVP-E variant — the stretched, upgraded evolution featuring increased wingspan, dihedral refinements, Walter M601E (and M601E-21) powerplants, and the later GE H80-200 transition in the E20 sub-variant.

Understanding What This Documentation Is — and Is Not

These are original factory-issued technical publications produced by LET Kunovice (Aircraft Industries), not simplified guides, RC plans, or reconstructed data.

• They are written for licensed engineers, maintenance professionals, restoration specialists, and serious researchers — not for casual readers.
• No airworthiness-complete documentation set for any Cold War-era commuter aircraft exists in a single archive. This dossier represents the deepest known surviving layer of primary-source documentation for the L-410 UVP-E family, drawn from multiple source streams.
• Documents are fixed at their original publication dates and carry the signatures, stamps, and authority marks of the issuing bodies — GosNII GA, GosNII AN, UPLG GVS FS VT Russia, and the Civil Aviation Inspection of the Czech Republic.
• If you are looking for simplified plans to build a replica or an RC model, this is not the right product for you.
• If you are a researcher, restorer, museum professional, MRO engineer, or type club member who needs access to the deepest available layer of surviving primary-source factory documentation — this is it.

Documents Included in This Dossier

• Do-L410-2011.3 — Руководство по Профилактическому Техническому Обслуживанию Самолёта (РПТО) / Preventive Maintenance Manual — L 410 UVP-Э (November 25, 1999). Approved by LET Chief Designer M. Pešak; countersigned by GosNII GA and GosNII AN; introduced by UPLG GVS FS VT Russia.
• Do-L410-1222.2 — Регламент Технического Обслуживания / Maintenance Schedule — L 410 UVP-Э без капитального ремонта (Without Overhaul) (November 25, 1999). Multi-authority approval: LET, GosNII GA, GosNII AN, and Russian aviation authority.
• Do-L410-1223.2 — Maintenance Schedule for the L410 UVP-E20 Aeroplane Without Overhaul. Chapter 9.7 approved by the Civil Aviation Inspection of the Czech Republic in Prague (August 31, 1995).
• Do-L410-1242.2 — Wiring Manual for the L410 UVP-E, E9, and E20 Aeroplanes — Book 1. Originally issued April 30, 1987; reissued August 5, 1992 and February 28, 1995. LET Kunovice / Aircraft Industries.
• Do-L410-1214.2 — Airplane Flight Manual for the L 410 UVP-E20 — Book 1 (Sections 0 to 5). Certified to FAR 23 Amendment 34. Approved by the Civil Aviation Inspectorate of the Czech Republic (May 13, 1998). Serial No. 912533 / Registration D-CLED / Type Certificate 90-03.
• ms-r05 — Checklist of Emergency, Abnormal and Normal Procedures — L 410 UVP-E20. LET Kunovice.
• Do-L410-1215.2 — Airplane Flight Manual (additional flight manual document, L 410 UVP-E series).

Aircraft Technical Overview

Airframe & Aerodynamics

• All-metal high-wing twin-turboprop STOL commuter
• Stretched fuselage with increased wingspan and dihedral modifications for spanwise lift optimisation
• Double-slotted trailing edge flaps, automatic flaps, and spoilers for steep STOL approach profiles
• Fixed wingtip fuel tanks reducing induced drag and extending stage range
• Equivalent fuselage diameter (de): approximately 2.04 m (6 ft 8.2 in)
• Horizontal tailplane MAC (cht): 1.48 m (4 ft 10.3 in)

Powerplant

• Walter M601E (or M601E-21 for hot-and-high operations) free power turbine turboprops — 750 SHP / 559 kW MTOP per engine
• Avia V510 five-blade constant-speed, fully feathering, reversible propellers (2.3 m diameter) with autofeather
• UVP-E20 sub-variant: General Electric H80-200 engines — 597 kW driving AV-725 propellers

Handling & Systems

• Strict CG discipline required — aft CG shift is a documented terminal stall risk on final approach
• Climatic envelope: −50 °C to +50 °C
• Dual-locking aileron, elevator, and rudder trim tab controls (ref. SB 006b)
• Certified for known icing: pneumatic de-icing boots + electro-thermal propeller de-icing

Performance (EASA TCDS A.026)

• MTOW: 6,400–6,600 kg (14,109–14,550 lbs, variant dependent)
• Max Payload: 1,650–1,800 kg (3,637–3,968 lbs)
• Max Cruise Speed: 380 km/h (205 KIAS / 219 KTAS)
• Range: 1,380–1,500 km (745–810 NM)
• Service Ceiling (two engines): 4,200–6,320 m (14,000–20,735 ft)
• Single Engine Ceiling: 4,755 m (15,600 ft at 95% MTOW)
• Fuel Consumption: ~280 kg/hour cruise

Document Reference Index

• Do-L410-2011.3 — Preventive Maintenance Manual (РПТО)
• Do-L410-1222.2 — Maintenance Schedule (Without Overhaul, Russian approval)
• Do-L410-1223.2 — Maintenance Schedule (Without Overhaul, Czech approval, UVP-E20)
• Do-L410-1242.2 — Wiring Manual, Book 1 (UVP-E / E9 / E20)
• Do-L410-1214.2 — Airplane Flight Manual, Book 1 (UVP-E20, FAR 23 Am.34)
• Do-L410-1215.2 — Airplane Flight Manual (UVP-E series)
• ms-r05 — Emergency, Abnormal and Normal Procedures Checklist

⚠️ Regulatory Notice: Under FAA 14 CFR § 43.13 and EASA Part-M, any mechanic performing maintenance on an active aircraft must use current, manufacturer-approved revision-controlled data. This archival document does not satisfy that requirement.

This is an archival, static-copy edition fixed at its original publication date. Intended for historical reference, flight simulation, museum restoration, and educational use only. Not approved for active airworthiness maintenance under FAA 14 CFR § 43.13, EASA Part-M, or equivalent international regulations. Operators of active aircraft must use current, revision-controlled publications from the Type Certificate holder or an authorised distributor.

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