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China Eagle Soars into the Sky — Expected airworthiness demonstration flight of ARJ21-700

China Eagle Soars into the Sky — Expected airworthiness demonstration flight of ARJ21-700. Aircraft Airworthiness Dept. of CAAC Zhao Yuerang, Deputy Director Sep. 2007. Outline. Preface Airworthiness demonstration flights challenge limit First-class facilities ensure successful test flight

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China Eagle Soars into the Sky — Expected airworthiness demonstration flight of ARJ21-700

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  1. ChinaEagle Soars into the Sky— Expected airworthiness demonstration flight of ARJ21-700 Aircraft Airworthiness Dept. of CAAC Zhao Yuerang, Deputy Director Sep. 2007

  2. Outline • Preface • Airworthiness demonstration flights challenge limit • First-class facilities ensure successful test flight • Test flight on plateau show ARJ features • Following international general requirement to avoid test flight risk • Prospect CAAC-AAD

  3. Preface • Aircraft ARJ21-700 is now intensively under its assembly, debug and ground test demonstration. Subject to strict correlated requirements of Airworthiness Standard for Transport Aircraft of China civil aviation regulations CCAR Part 25 which is in accordance with international level, it will start its airworthiness demonstration flight in the 1st quarter of next year. CAAC-AAD

  4. Outline • Preface • Airworthiness demonstration flights challenge limit • First-class facilities ensure successful test flight • Test flight on plateau show ARJ features • Following international general requirement to avoid test flight risk • Prospect CAAC-AAD

  5. Airworthiness demonstration flights challenge limit • By Aug. 2007, over 60 CP around aircraft ARJ21-700 has been basically completed, and reached a consensus with representative of FAA Shanghai Office. • In order to improve the test flight efficiency and shorten the test flight time, series works such as manufacturing experimental aircraft, manufacture conformance check, analysis of fundamental flight data, functionality and reliability test of ground system, modification and preparation of test flight equipment have been highly intersected between authority and applier. • There are totally 3 experimental ARJ21-700s applied to the airworthiness demonstration flight for testing performance, power plant and load strength, and aircraft system separately. • There will be over 40 flight test subjects which lasted around 2 years. CAAC-AAD

  6. Airworthiness demonstration flights challenge limit • In order to make sure conformity with airworthiness requirement and flight safety requirement after entering into service, it must make flight test demonstrating that ARJ-700 could continue flying safely and landing under all expected limit conditions and all possible boundary failure status. ARJ21 test flight will challenge many limits and high dangerous flight subjects. • Flutter test flight, single-engine shutdown test flight • Stalling speed determination and stalling feature demonstration, minimum flight speed control, and minimum takeoff speed • FCS (flight control system) control rate evaluation and automatic flight failure • Air intake stability test at big thrust / high angles of attack • High speed performance test at max. crossing control VM0/MM0 • PIO (pilot-induced oscillations) feature study,test for incorrect operation during taking off • Evaluate of control quality for point, angle or sensitive area of flight envelop, and natural icing flight • Abnormal status and combined with engine failure flight test based on system and configuration • Each of all the above-mentioned flight test subjects is a big challenge for any applicant and CAAC participant in flight test. CAAC-AAD

  7. Outline • Preface • Airworthiness demonstration flights challenge limit • First-class facilities ensure successful test flight • Test flight on plateau show ARJ features • Following international general requirement to avoid test flight risk • Prospect CAAC-AAD

  8. First-class facilities ensuresuccessful test flight • In order to complete airworthiness demonstration flight, it will use several sets of test systems for ARJ21, including collector, front-end sensor, adjuster, airborne real-time data processing system, telemetry parameter generation equipment and telemetry system. Flight test control center will realize real-time monitoring. • Both fixed and mobile telemetry ground station systems will be equipped during ARJ test flight • Fixed station can monitor the air zone with surrounding area of 400 km around the control center and operating altitude of 15,000m • Mobile station will be used for test flight under the situation of high cold and plateau conditions • ARJ21 can download and analyze for more than 6000 estimated data links in real-time through these powerful equipment, therefore to improve test efficiency and safety CAAC-AAD

  9. First-class facilities ensuresuccessful test flight • For determining data such as stalling speed, referring to FAA Flight Test Guide for Transport Aircraft Certification Review AC25-7A, all tests are required to utilize strict-calibrated instruments, some tests are required sole experimental measure systems. • In airspeed system calibration and stalling speed determination, it will additionally equip drag cone system and nose airspeed strut as well as reverse spin umbrella. • In order to dispatch center of gravity, it will equip water trimming system • In test flight of flutter, control surface stimulating system and inertial stimulating system, will be equipped • Test flight at natural icing condition, atmospheric parameter measure system will be equipped additionally • In engine experiment, vibration parameter test system will be equipped • These international first-class facilities will strongly guarantee the success of ARJ21-700 airworthiness demonstration flight. CAAC-AAD

  10. Outline • Preface • Airworthiness demonstration flights challenge limit • First-class facilities ensure successful test flight • Test flight on plateau show ARJ features • Following international general requirement to avoid test flight risk • Prospect CAAC-AAD

  11. Test flight on plateau show ARJ features • One advantage of ARJ21-700 is its strong adaptability to plateau and it can fly at plateau without reducing load • For this purpose, in the process of design, special attention is given to the utilization under plateau and high temperature condition. • In accordance with regulation, max. allowable extension limit for basic taking off test data are higher than 6000 feet standard altitude of test airport and lower than 3000 feet standard altitude of test airport. • For airport over 8,000 feet, it will be required to finish functionability test demonstration of cabin pressure system • At the same time, the extension data will be constrained by engine data extension scale • In order to satisfy the requirement of regulation and show the plateau performance of ARJ21-700, ARJ21 will complete quite a lot of task of airworthiness evaluation test flight at plateau airport, which is seldom seen in global civil aircraft research and manufacture. CAAC-AAD

  12. Outline • Preface • Airworthiness demonstration flights challenge limit • First-class facilities ensure successful test flight • Test flight on plateau show ARJ features • Following international general requirement to avoid test flight risk • Prospect CAAC-AAD

  13. Following international general requirementto avoid risk of flight test • According to the world statistics collected in the past 25 years, one aircraft of transport category has had an accident in flight test every three to four year. • Therefore authority asked the ARJ21 flight test should follow the management principles of FAA Order 4040.26A in terms of danger distinguish, risk assessment, risk management process and risk control, flight team capability improvement and any other managements; as well as enforcement in flight test organization and flight task arrangement. • Apart from that, flight test pilot either from applicant or from CAAC will be asked to train at aboard in respect of FAA requirements. CAAC-AAD

  14. Outline • Preface • Airworthiness demonstration flights challenge limit • First-class facilities ensure successful test flight • Test flight on plateau show ARJ features • Following international general requirement to avoid test flight risk • Prospect CAAC-AAD

  15. Prospect • Distinguished leaders, comrades and friends, as an ordinary worker of ARJ21-700 project, I am looking forward to the challenging airworthiness demonstration flight of ARJ21-700. My colleague and I will cooperate sincerely with applicant to enable ARJ21-700 airworthiness demonstration flight to succeed and China eagle to sores into the sky! CAAC-AAD

  16. Thank You！ CAAC-AAD

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