Circular 181
Accident/Incident Reporting (ADREP): Annual Statistics - 1981
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CIRCULAR 1 h ACCIDENT/INCIDENT REPORTING ADREP ANNUAL STATISTICS -- 1981 Approved by the Secretary General and published under his authority lNT ERNATUONAL I CIVIL AVlATlON ORGANIZATION MONTREAL CANADA
Published ln seprna English, French and Spanish edirfons by the International Civil Aviation Organbarion. A II correspondence, except orders and subscriptions, should be addressed to the Secmtary General. Orders for this publication should be sent to one of the following addresses, together with the appropriate remittance by bank draft or post office money order in U.S. doflm or the currency of the country in which the order is placed. Document Sales Unit International Civil Aviation Organization 1000 Shetbrooke Street West, Suite 400 Montreal, Quebec Canada H3A 2R2 Argentina. El Atenm, Pedro Garcia S.A.L.E. e I., Dpto. Compras - irnprtacibn, Patagones 2463, 1282 Buenos Aires. pt. ICAO Represenutive, Middle East and Eastern African OFfice. 16 Hassan Sabri, Zamalek, Cairo. France. Representant de I'OACI, Bureau Europe, 3bis, villa Emile-Bergerat, 92522 Neuilly-sur-Seine, Cedex. India. Oxford Book and Stationery Co., Scindia House, New Delhi or 17 Park Street, Calcutta. Japan. Japan Civil Aviation Promotion Foundation, 15-12. I-chome, Toranomon, Minato-Ku. Tokyo. Mexico. Representante de la OACI, Oficina Norteamkrica y Carib, Apartado postal 5-377, Ukxico 5, D.F. Peru. Representante de la OACI, Oficina Sudamkrica, Apartado 4127, Lima 100. Snegal. Representant de I'OACI, Bureau Afrique, bite postale 2356, Dakar. Spain. Libreria cle Aeradutica y Astrodutica Surnaas, Desengaiia, 12-393, Wid 23. Thailand. ICAO Representative, Asia and Pacific OMice, P.O. Box 614, Bangkok, United Kingdom. Civil Aviation Authority, Printing and Publications Services, Greville House, 37 Gratton Road, Cheltenham, Glos., GL50 2BN. Do you receive the ICAO BULLETIN The ICAO Bullatin contains a concise account of the activities of the Organization as well as articles of interest to the aeronautic Wd The Bulletin will also keep you up to date on the latest ICAO puWic8- tims. their contents, amendments, supplements, cdgenb, WI prim. Available in thrw separate ditims English. French and Spanish. Annual subsaiptlon U.S. 1 5.00 surface mail U.S. 20.00 lair mail.
CONTENTS ................................... Introduction TABLE I - Accidents and Incidents by Type of Operation ..................... and Aircraft Weight 1981 TABLE I1 - Accidents and Incidents to Aeroplanes by Type of Operation ....................... and Powerplant 1981 PART I ACCIDENTS TO AEROPLANES .......................... Scheduled Airline Operations ........................ Non-scheduled Airline Operations ............................ Other Airline Operations GeneralAviation................................ PART I1 ACCIDENTS TO HELICOPTERS AirlineOperations. .............................. GeneralAviation................................ PART I11 INCIDENTS .............................. AirlineOperations. GeneralAviation... ............................. Page 1
INTRODUCTION General This is the fifth publication of statistics from the ICAO AccidentIIncident Reporting ADREP System. These statistics are based on 775 accidents and incidents which occurred in 1981 to aircraft of a maximum take-off weight of more than 2 250 kg 5 000 lb. The statistics were compiled in December 1983. Purpose The purpose of the ADREP statistics is to provide simple data which may be useful for general safety studies and accident prevention. For more specific needs the ADREP system provides information in response to specific ADREP requests. Data Base These statistics are based on 775 reported occurrences. Of these, 695 were - Data Reports. Unfortunately 80 occurrences were reported only as Preliminary Reports, which do not include factors and cannot be used for statistics on factors. Limitations When considering the information presented, the reader must be aware of the following limitations a Only occurrences reported to ICAO on the ADREP system are included b The ADREP Manual contains specific coding instructions. Nonetheless there may be some unintentional bias on the part of persons coding since ultimately the coding must be done by humans one cannot assume that judgemental bias has been totally eliminated in the ADREP reporting forms, particularly with respect to the coding of factors c ac'tors statistics are based only on the 695 AccidentIIncident Data Reports received from States d Some accidents are reported to ICAO on computer tapes and are processed through a conversion programme before they are entered in the ADREP data bank. Since the data so reported may not be fully compatible with the ADREP system recording precision is not attainable in all cases. For example, the ADREP system for type of occurrence subdivides "Gear Collapsed" into "Nose gear, Main gear, Complete gear and Other gear" with a specific code for each. However, the information received on a computer tape may indicate only "Gear collapsed".
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