John Doherty AIA Co-Chair | Patrick Zaccaria AIA Co-Chair AIA Powerplant Indications Task Team Report AIA Powerplant Indications Task Team Report Abstract Airplanes, Commercial, Transport, Engines, Powerplant, Jet, Turbofan, Turboprop, Indications, Certification, Displays Disclaimer: The views expressed herein are endorsed by the members of the AIA Powerplant Indications Task Team (Appendix B) and do not necessarily reflect the views of the companies & agencies that they represent. Executive Summary The AIA Powerplant Indications Task Team was formed July 2001 in response to the FAA draft Harmonization Terms of Refer- ence (HTOR) 25.1305. The team was subsequently sanctioned by the AIA as the Powerplant Indications Task Team. The team includes representation from several Airframe Manufacturers, Engine Manufacturers and Regulatory Agencies. The AIA PITT was an active working group from late 2001 through mid-2006. After 2006 the team gradually prepared a team report via ad hoc team telecons. The team has provided: • A Powerplant Indications input to the Avionics Systems Harmonization Working Group (ASHWG) draft AC/AMC 25-11 Electronic Displays. Much of the AIA Powerplant Indications Task Team input was incorporated in revision AC25-11A released by the FAA in June, 2007 • A revision proposal to FAR/CS §25.1305 “Powerplant instruments”. The proposed §25.1305 allows for use of the exist- ing prescriptive list of powerplant indications (updated in some areas) or alternatively an objective-based approach for some or all powerplant indications. A notable addition to the prescriptive list is the requirement for an engine fail (sub- idle) indication. • Recommendations for a revision to FAR/CS §25.1549 “Powerplant and auxiliary power unit instruments”. §25.1549 requires revision to align with current accepted practices and to allow for alignment with crew alerting requirements of §25.1322. • Recommendations for a revision of AC20-88A, to align with current accepted practices and to allow for alignment with crew alerting requirements of §25.1322. AC20-88A is outdated relative to current design practice (i.e. glass flight decks). • Recommendations for a revision to FAR/CS §25.1337 “Powerplant instruments”. §25.1337 is in some cases redundant to other, existing regulations and in some cases outdated relative to current technology. In addition, §25.1337 is a mix of flammable fluid requirements, indications requirements and fire safety requirements. The AIA Powerplant Indications Task Team recommends that these different types of requirements be grouped appropriately within the Code of Federal Regulations. • A white paper intended for the FAA Engine and Propeller Directorate and EASA Engine Certification branch regarding “Engine Parameter Indication and Certification: The Integration of Engine TCDS Limits and Their Role in Aircraft Safety”. This paper addresses the current practice of treating all engine certification limits as safe operating limits and therefore marking their airplane indications with redlines and, in some cases, associating flight deck warnings lights or messages. This is often inconsistent with aircraft display philosophy and airplane certification requirements. • A response to HTOR 25.1305, and • A Team Report, which this document comprises. AIA Powerplant Indications Task Team Report Main Contributing Individuals and Organizations Individuals Organizations* Members Past & Present Pierre-Emmanuel Arnaud Airbus Arnaud Bonnet Airbus Patrick Zaccaria Airbus John Doherty Boeing Commercial Airplane Joseph Sikora Boeing Commercial Airplane Geof Armstrong Bombardier Braulio Medeiros Embraer Jairo Scherrer Embraer Sarah Knife General Electric Vladimir Lozovsky IAC AR Larry Carlisle Pratt & Whitney William Fletcher Rolls-Royce Barry Rohm (now retired) Rolls-Royce Yves Cousineau Transport Canada Robin Boning (now retired) UK Civil Aviation Authority Ann Azevedo US Federal Aviation Administration Bill Emmerling US Federal Aviation Administration Gary Horan US Federal Aviation Administration Hals Larsen (now retired) US Federal Aviation Administration Mike McRae (now retired) US Federal Aviation Administration Chip Queitzsch US Federal Aviation Administration Consultation Mike Young Pratt & Whitney Laurent Gruz European Aviation Safety Agency Ken Fontaine UK Civil Aviation Authority *Note: This list reflects the organization that the individual represented at the time during which they participated in the AIA Powerplant Indications Task Team. AIA Powerplant Indications Task Team Report Table of Contents Abstract ....................................................................................................................................................................................................................................................................................................1 Executive Summary .................................................................................................................................................................................................................................................................1 LIST OF APPENDICES ........................................................................................................................................................................................................................................................4 1. BACKGROUND: 5 1.1 Team Formation ........................................................................................................................................................................................................................................5 1.2 Ground Rules ................................................................................................................................................................................................................................................6 1.3 Safety Issue .....................................................................................................................................................................................................................................................7 1.4 Propulsion System Malfunction Plus Inappropriate Crew Response (PSM+ICR) .........................................8 1.5 Existing Regulations ........................................................................................................................................................................................................................10 1.6 Evolution of Technology .............................................................................................................................................................................................................10 1.7 Recommended Strategy ..........................................................................................................................................................................................................14 2. PROPOSALS 16 2.1 Proposed FAA and CS regulation §25.1305 Powerplant Indications ........................................................................16 2.2 Revise FAA and CS regulation §25.1549 and FAA AC 20-88A .........................................................................................20 2.3 Revise FAA and CS regulation §25.1337 Powerplant indications ..................................................................................22 2.4 Powerplant input to AC / AMC 25-11 ‘Electronic Displays’ ...................................................................................................22 2.5 Engine Limits and the Engine Type Certification Data Sheet (ETCDS) .....................................................................23 3. RECOMMENDATIONS 25 3.1 Response to FAA draft HTOR 25.1305 ...............................................................................................................................................................25 3.1.1 Low Fuel Indication ........................................................................................................................................................................................................25 3.1.2 Engine Failure Indication .........................................................................................................................................................................................25 3.1.3 Asymmetric Thrust/Power Indication ....................................................................................................................................................25 3.1.4 Additional Prescriptive Indications as Required by §25.1309(c) .....................................................................27 3.1.5 Engine Surge/Stall Indication ...........................................................................................................................................................................28 3.1.6 General, Modernization, and AC25-11”Electronic Displays” (1987) .........................................................29 3.2 Other Discussion Items ..............................................................................................................................................................................................................29 3.2.1 Auxiliary Power Unit Indications ...................................................................................................................................................................29