stator vane
27th Aug 2002, 13:43
i will try to describe what i have seen and ask if anyone knows a good explanation: will be difficult without drawing it, so bear with me.
Sept 27 northbound at FL330 over France on a flight from MAD to BRU. heading approximately 030 and using radar which is displayed on EHSI (lower EFIS screen which shows map and radar combined) just some light green returns scattered about the area. nothing worth avoiding.
everything normal until suddenly there appears a green streak in the radar presentation from bottom center of EHSI (aircraft position on map) extending in straight line, slightly expanding on a 055 "course" it stays there for three or four sweeps of the radar then disappears. just a few minutes later, it reappears in same position, this time intensified showing a streak of yellow and red still on a 055 "course.
again it disappears and then returns at what seems to be a random sequence but always on the same 055 "course" with varying intensities from time to time.
a few minutes later, we are cleared direct to AVROL and the aircraft turns to a heading of 050 and the streak retains the same "course" 055 as we turn and after stabilized.
i have seen it several times before and didn't know what it was, and surmised that it might have been an internal radar fault due to overheating etc.
i heard one person suggest that it might be some ground military radar "sighting" our aircraft, but said person had no reference or other supporting information.
any help would be appreciated and would prefer some references if possible. i have only seen it over europe while flying the brussel's based 737's with a slight red tint.
surely i am not the only one to have seen such a thing.
and while we are at it, what are those loud high pitched beeps that i hear on a regular basis while over France? reminds me of the hearing test sounds, but way too loud. makes me raise my finger in acknowledgment that i heard the sound.
please minimize the jokes to one or two pages each response!!!!
Sept 27 northbound at FL330 over France on a flight from MAD to BRU. heading approximately 030 and using radar which is displayed on EHSI (lower EFIS screen which shows map and radar combined) just some light green returns scattered about the area. nothing worth avoiding.
everything normal until suddenly there appears a green streak in the radar presentation from bottom center of EHSI (aircraft position on map) extending in straight line, slightly expanding on a 055 "course" it stays there for three or four sweeps of the radar then disappears. just a few minutes later, it reappears in same position, this time intensified showing a streak of yellow and red still on a 055 "course.
again it disappears and then returns at what seems to be a random sequence but always on the same 055 "course" with varying intensities from time to time.
a few minutes later, we are cleared direct to AVROL and the aircraft turns to a heading of 050 and the streak retains the same "course" 055 as we turn and after stabilized.
i have seen it several times before and didn't know what it was, and surmised that it might have been an internal radar fault due to overheating etc.
i heard one person suggest that it might be some ground military radar "sighting" our aircraft, but said person had no reference or other supporting information.
any help would be appreciated and would prefer some references if possible. i have only seen it over europe while flying the brussel's based 737's with a slight red tint.
surely i am not the only one to have seen such a thing.
and while we are at it, what are those loud high pitched beeps that i hear on a regular basis while over France? reminds me of the hearing test sounds, but way too loud. makes me raise my finger in acknowledgment that i heard the sound.
please minimize the jokes to one or two pages each response!!!!