EASA Regulations for Grumman G-164

5 airworthiness directives and regulations affecting Grumman G-164.

EASA AD 2024-0040-E

SUPERSEDED BY EASA AD 2024-0194

EASA Airworthiness Directive 2024-0040-E is an emergency directive addressing a potential unsafe condition in GE Aviation Czech M601 series engines installed on various aircraft including the LET L-410, Air Tractor AT series, Grumman G-164, and others. The directive mandates inspection of the centrifugal compressor case for cracks and restricts installation of affected parts. It applies to engines with specific part numbers M601-154.55 and M601-154.65 unless previously inspected and cleared.

Feb 8, 2024

Airworthiness DirectiveMaintenanceSafety MgmtGe Aviation Czech M601LET L-410Air Tractor AT seriesGrumman G-164

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 2021-0154

SUPERSEDED BY EASA AD 2023-0020

EASA Airworthiness Directive 2021-0154 is an airworthiness directive addressing GE Aviation Czech M601 series engines installed on various aircraft including Aircraft Industries L-410 and L-420, Air Tractor AT series, Grumman G-164, PZL-106, Dornier Do 28, Thrush S-2R, Viking DHC-3 Otter, Zlin Z-37T, and PAC FU-24. The directive mandates replacement and life limit implementation for propeller shafts with specific part numbers to ensure continued airworthiness and prevent potential propeller shaft failure.

Jul 1, 2021

Airworthiness DirectiveMaintenanceSafety MgmtGe Aviation Czech M601Aircraft Industries L-410Aircraft Industries L-420Air Tractor AT seriesGrumman G-164PZL-106Dornier Do 28Thrush S-2RViking DHC-3 OtterZlin Z-37TPAC FU-24

EASA AD 2021-0052

SUPERSEDED BY EASA AD 2021-0154

EASA Airworthiness Directive 2021-0052 is an airworthiness directive addressing GE Aviation Czech M601 series engines installed on various aircraft including the LET L-410 series, Air Tractor AT series, Grumman G-164, PZL-106, Dornier Do 28, Thrush S-2R, DHC-3 Otter, Zlin Z-37T, and PAC FU-24. The directive focuses on the replacement and life limit implementation of propeller shafts, specifically part numbers M601-6081.2, M601-6081.4, and M601-6081.6. It mandates compliance to ensure continued airworthiness and prevent propeller shaft failure.

Feb 24, 2021

Airworthiness DirectiveMaintenanceSafety MgmtGe Aviation Czech M601LET L-410Air Tractor ATGrumman G-164PZL-106Dornier Do 28Thrush S-2RDHC-3 OtterZlin Z-37TPAC FU-24

EASA SIB SAFO15007

Pratt & Whitney R-985 (Wasp Junior) Engines — Flyweight Hardware Failures

SAFO 15007 is a Safety Alert for Operators issued by the FAA regarding Pratt & Whitney R-985-AN-14B (Wasp Junior) engines. It addresses failures caused by fatigued flyweight screws and improperly modified or under-torqued expanders, which have led to in-flight engine failures and forced landings. The alert also applies to other Pratt & Whitney Wasp Jr (R-985 Series) and Wasp (R-1340 Series) engines used in various aircraft including Air Tractor AT-301 and 401, Ayres Thrush, Beechcraft D17 and 18 series, Boeing-Stearman 75, de Havilland DHC-2 and DHC-3, Gee Bee, Grumman G-21 and G-164, Howard DGA-6, -11, -15, North American T-6, and Weatherly 201 and 620.

Jul 15, 2015

Safety Information BulletinMaintenanceSafety MgmtAir Tractor AT-301Air Tractor AT-401Ayres ThrushBeechcraft D17Beechcraft 18Boeing-Stearman 75de Havilland DHC-2de Havilland DHC-3Gee BeeGrumman G-21Grumman G-164Howard DGA-6Howard DGA-11Howard DGA-15North American T-6Weatherly 201Weatherly 620