CATA Worklist Item (CWI) Decision Documents

Certification Authorities for Transport Airplanes (CATA)
The Certification Authorities for Transport Airplanes (CATA) comprises aircraft certification management representatives from ANAC (Brazil), EASA (EU), FAA (US), and TCCA (Canada). The CATA is tasked to identify and pursue, through collaborative activity, certification policy and guidance harmonization opportunities.

For further information, please contact the EASA CATA management representative:

Israel Navarro israel.navarro-santos-juanes [at] easa.europa.eu or Mathilde Labatut mathilde.labatut [at] easa.europa.eu (mathilde[dot]labatut[at]easa[dot]europa[dot]eu)

CATA Harmonization Decisions
CATA harmonization decisions are documented in closed CATA Worklist Item (CWI) forms, signed by the CATA principals from all four authorities. CATA closure decisions vary depending on the nature of the issue.

Most CATA CWI forms document an agreed compliance methodology for the subject certification issue. If an applicant follows the documented methodology, and their certificating authority endorses that methodology for a certification project, the other three CMT authorities will accept the methodology for validation. The objective is to offer to industry harmonized compliance approaches, which if adopted, will streamline the validation process. Typically, the subjects addressed in CATA decision documents are those that have required significant authority and industry resource expenditure to resolve in multiple projects.

CATA Worklist Item (CWI) Decision Documents

CATA Reference

Subject

Closure Date

ANAC-001 (PDF) Fuel Line installation – Crashworthiness 05/09/2024
TCCA-006 (PDF) Evacuation slide system installed in non-pressurized compartment 17/04/2024
TCCA-005 (PDF) MRB task interval escalation  20/10/2022
FAA-005 (PDF) Flight Control System - Operation Tests 
 
19/10/2022
EASA-003 (PDF) Installed systems and equipment for use by the flight crew (25.1302) 17/08/2022
EASA-005 (PDF) Proposed CWI for unusual landing operations Open
TCCA-002 (PDF)

In-Flight All-Engines-Out Restart Guidance

18/08/2020

FAA-003 (PDF)

Communication, Navigation, and Surveillance Harmonization

29/10/2019
(Interim Release)

TCCA-001 (PDF)

High Intensity Radiated Fields (HIRF) Testing

24/10/2019

FAA-001 (PDF)

Flightcrew Emergency Exits Proximity

24/09/2019

TCCA-003 (PDF)

Engine Rotor Lock Testing

29/11/2018

FAA-002 (PDF)

Software Guidance Harmonization

08/03/2018

TCCA-004 (PDF)

Aircraft Level Integration Testing

08/03/2018

CATA Decision Document Use

As noted previously, if an applicant proposes to adopt the compliance methodology documented in a CATA decision document, and their certificating authority endorses that methodology for a project, the other three CMT authorities will accept the methodology for validation.

As with any policy, if a CATA member-authority becomes aware of circumstances that make it apparent that following the documented approach would not result in compliance with the member-authority's applicable airworthiness standards, then the terms of the CATA document are non-binding and the member-authority may require additional substantiation or design changes as a basis for determining compliance. Compliance approaches described in CATA decision documents are also non-binding for applicants. Applicants are free to propose alternative approaches.