EASA Regulations for Pratt & Whitney Canada PT6A-67

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

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New ADs and bulletins for Pratt & Whitney Canada PT6A-67, summarized like the ones below, every Monday.

EASA AD CF-2024-33

Sep 19, 2024

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.

Airworthiness Directive
  • Pratt & Whitney Canada PT6A-67

EASA AD CF-2024-05

Feb 15, 2024

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.

Airworthiness Directive
  • Pratt & Whitney Canada PT6A-67
  • Pratt & Whitney Canada PT6A-68

EASA AD CF-2022-26

May 18, 2022

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.

Airworthiness Directive
  • Pratt & Whitney Canada PT6A-67

EASA AD CF-2021-37

Nov 9, 2021

Engine Bleed Air – Bleed-Off Valve (BOV) Failure to Close

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.

Airworthiness DirectiveSuperseded
  • Pratt & Whitney Canada PT6A-67

EASA AD CF-2021-20

May 19, 2021

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.

Airworthiness Directive
  • Pratt & Whitney Canada PT6A-67