Originally Posted by
DaveReidUK
Are you sure about that ?
I haven't seen any FDR traces for the two flights where problems were reported that occurred prior to the AoA sensor replacement. Nor
AFAIK has there been any report on the condition of the removed sensor.
No FDR but Maint log in prelim report shows the following AOA errors
before sensor replacement:
AOA SIGNAL FAIL (34-21023)
34-21107 (AIR DATA SIGNAL INVALID)
34-21123 (AOA SIGNAL OUT OF RANGE)
We also know the problems were intermittent because I think it's already been shown in these threads that there was at least one uneventful sector in between.
IMHO it's entirely possible that neither sensor was faulty and both were correctly installed, i.e. the fault was farther downstream and replacing the sensor made no difference.
Agree - I think far more likely one fault elsewhere than two faulty sensors. However, replacing the sensor
did make
a difference: an intermittent signal corruption / loss changed into a constant signal corruption...