The report describes the results obtained from a Mode 'C' data collection conducted at CRNA Sud-Est, Aix-en-Provence, to assess aircraft height-keeping stability at high altitudes over mountainous areas. A total of 1072 different flights were monitored by a dedicated task observer provided with facilities for monitoring and interviewing aircraft. 65 flights were observed with assigned altitude deviations (AAD) of 300ft or more; Flight Technical Error (FTE) was responsible, or partially responsible, for a large proportion of these deviations. Statistical analysis of the total data collected (monitored and unmonitored flights operating at FL 290 and above), based on more than 9600 different flights, shows a good general overall quality of height-keeping, with Mode 'C' within the range CFL + 100ft for 98% of total flight time and within the range CFL + or - 200ft for more than 99% of total flight time.
Aircraft Height-Keeping Stability at High Altitudes over Mountainous Areas: Mode 'C' Data Collection at CRNA Sud-EST, Aix-en-Provence
1987
124 pages
Report
No indication
English
Stability and control of piloted aircraft at high altitudes
Engineering Index Backfile | 1956
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