EASA Regulations for Viking Air DHC-3 Otter

5 airworthiness directives and regulations affecting Viking Air DHC-3 Otter.

EASA AD 2026-0123

Time Limits / Maintenance Checks – Airworthiness Limitations Section – Amendment

EASA Airworthiness Directive 2026-0123 is an amendment concerning time limits and maintenance checks in the Airworthiness Limitations Section for GE Aviation Czech H75, H80, and H85 engine models. This directive applies to these engines installed on aircraft such as the Aircraft Industries L410-UVP-E20, L410-NG, Do 28 series, Thrush S-2R series, and Viking Air DHC-3 Otter. It mandates compliance with updated maintenance tasks and life limits to ensure continued airworthiness.

Jul 3, 2026

Airworthiness DirectiveMaintenanceSafety MgmtGe Aviation Czech H75, H80, H85Aircraft Industries L410-UVP-E20Aircraft Industries L410-NGDornier Do 28Thrush S-2RViking Air DHC-3 Otter

EASA AD 2021-0264R1

Engine — Critical Parts — Replacement

EASA Airworthiness Directive 2021-0264R1 is a regulatory update addressing critical parts replacement for GE Aviation Czech M601 series engines installed on various aircraft including the Aircraft Industries L-410 and L-420, Air Tractor AT series, Allied Ag Cat G-164, Thrush S-2R, and Viking Air DHC-3 Otter. The directive focuses on ensuring the replacement and proper identification of affected compressor cases and drums to prevent engine failures. It mandates compliance with specific life limits and logbook corrections to maintain engine airworthiness.

Mar 28, 2023

Airworthiness DirectiveMaintenanceSafety MgmtGe Aviation Czech M601Aircraft Industries L-410Aircraft Industries L-420Air Tractor AT seriesAllied Ag Cat G-164Thrush S-2RViking Air DHC-3 Otter

EASA AD 2022-0034

Engine — Outer Liner Dilution Tube — Inspection

EASA Airworthiness Directive 2022-0034 is an airworthiness directive addressing the inspection of the outer liner dilution tube on GE Aviation Czech M601 and H-series engines. It applies to multiple engine models including M601D, M601E, M601F, M601Z, H75, H80, and H85 series, which are installed on various aircraft such as the Air Tractor AT-400 and AT-500 series, Grumman G-164 series, and Viking Air DHC-3 Otter among others. The directive mandates repetitive borescope inspections of specific outer liner parts to detect cracks and prevent potential engine power loss.

Mar 4, 2022

Airworthiness DirectiveMaintenanceSafety MgmtGe Aviation Czech H75, H80, H85Ge Aviation Czech M601Air Tractor AT-400Air Tractor AT-500Grumman G-164Viking Air DHC-3 Otter

EASA AD 2022-0008

SUPERSEDED BY EASA AD 2023-0021

EASA Airworthiness Directive 2022-0008 is an airworthiness directive issued by the European Union Aviation Safety Agency affecting GE Aviation Czech H75, H80, and H85 engine models installed on various aircraft including the Aircraft Industries L410-UVP-E20 and L410-NG, RUAG Aerospace Do 28 series, Thrush Aircraft 510G and S-2R series, and Viking Air DHC-3 Otter aeroplanes. The directive mandates compliance with updated airworthiness limitations published in the GEAC Engine Maintenance Manual to ensure continued safe operation of these engines.

Jan 19, 2022

Airworthiness DirectiveMaintenanceSafety MgmtGe Aviation Czech H75, H80, H85Aircraft Industries L410-UVP-E20Aircraft Industries L410-NGRUAG Aerospace Do 28Thrush Aircraft 510GThrush Aircraft S-2RViking Air DHC-3 Otter

EASA AD 2020-0201R2

Engine Fuel & Control — Fuel Control Unit — Replacement

EASA Airworthiness Directive 2020-0201R2 is an update addressing the replacement of fuel control units (FCU) on GE Aviation Czech M601 and H80 series engines installed on various aircraft including the Aircraft Industries L-410, Air Tractor AT series, Allied Ag Cat G-164, PZL-106 Kruk, RUAG Do 28, Thrush S-2R, and Viking Air DHC-3 Otter. The directive mandates replacement of affected FCUs due to improperly installed rubber cuff sealings that can cause engine power fluctuations and potential loss of control. It applies to all serial numbers of the listed engine models with specific affected FCU part and serial numbers detailed in the directive.

Jan 14, 2021

Airworthiness DirectiveMaintenanceSafety MgmtGe Aviation Czech H75, H80, H85Ge Aviation Czech M601Aircraft Industries L-410Air Tractor AT seriesAllied Ag Cat G-164PZL-106 KrukRUAG Do 28Thrush S-2RViking Air DHC-3 Otter