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EASA Regulations for Pratt & Whitney Canada PT6A-67

5 airworthiness directives and regulations affecting Pratt & Whitney Canada PT6A-67.

EASA AD CF-2024-33

Engine — First-Stage Power Turbine (PT1) Blade Failure

The Canadian Airworthiness Directive CF-2024-33 addresses a failure risk in the first-stage power turbine (PT1) blades of Pratt & Whitney Canada PT6A series engines, including models PT6A-64 through PT6A-67T. This directive mandates inspection and replacement of suspect PT1 blades identified by specific part and heat codes to prevent potential engine power loss or in-flight shutdown. The directive applies to all serial numbers of the affected engines and aims to ensure continued airworthiness and flight safety.

Sep 19, 2024
Airworthiness DirectiveMaintenanceSafety MgmtPratt & Whitney Canada PT6A-67

EASA AD CF-2024-05

Engine — Second-Stage Power Turbine (PT2) Blade Failure

Canadian Airworthiness Directive CF-2024-05 is an emergency directive addressing second-stage power turbine (PT2) blade failures in Pratt & Whitney Canada PT6A and PT6E engine models. It applies to multiple PT6A-64 through PT6E-66XT variants equipped with suspect PT2 blades, part number 3056693-01. The directive mandates removal and replacement of affected blades to prevent potential engine power loss or in-flight shutdown.

Feb 15, 2024
Airworthiness DirectiveMaintenanceSafety MgmtPratt & Whitney Canada PT6A-67Pratt & Whitney Canada PT6A-68

EASA AD CF-2022-26

Engine Bleed Air — Bleed-Off Valve Failure to Close

Airworthiness Directive CF-2022-26 addresses a safety issue with Pratt & Whitney Canada PT6E-67XP engines, specifically those with serial numbers HP0194 and earlier. The directive focuses on the failure of engine bleed air bleed-off valves (BOVs) to close properly, which can cause engines to fail to achieve required power during high power applications. This directive supersedes previous AD CF-2021-37 and mandates inspections, cleaning, and design modifications to improve valve reliability.

May 18, 2022
Airworthiness DirectiveMaintenanceSafety MgmtPratt & Whitney Canada PT6A-67

EASA AD CF-2021-37

SUPERSEDED BY TCCA AD CF-2022-26

The Canadian Airworthiness Directive CF-2021-37 addresses issues with Pratt & Whitney Canada PT6E-67XP engines, specifically those with serial number HP0138 and earlier. It mandates inspections and replacements of engine bleed air bleed-off valves (BOVs) to prevent failure to close due to contamination. This directive supersedes previous AD CF-2021-20 and related alternative means of compliance.

Nov 9, 2021
Airworthiness DirectiveMaintenanceSafety MgmtPratt & Whitney Canada PT6A-67

EASA AD CF-2021-20

SUPERSEDED BY TCCA AD CF-2021-37

The Canadian Airworthiness Directive CF-2021-20 mandates inspection and cleaning of the air bleed shutoff valves (BOV) on Pratt & Whitney Canada PT6E-67XP engines, serial number HP0138 and earlier. This directive addresses a failure of the BOV to fully close at high power settings due to contamination from glass beads used in the gas generator case manufacturing process. The directive aims to ensure engines produce required power during high-demand maneuvers.

May 19, 2021
Airworthiness DirectiveMaintenanceSafety MgmtPratt & Whitney Canada PT6A-67