HazelNuts39 The BEA Interim report mentions that the probes are inspected and cleaned at C-checks. Does anyone know the frequency of C-checks?
LeandroSecundo +/- 18 months
There is a big difference between checking the hole in an external pitot isn't blocked and a full check of the probe system. Is there a schedule for doing the former?
Performing a full probe check can require access to inaccessible places (see attached entry from the pitot tube thread). Leaving this to C-check time seems understandable.
Regards, Peter
(
permalink)
JRBarrett
I recently had a G-IV which had developed a serious in-flight data miscompare between the L/H and R/H air data computers. Ground testing quickly revealed a major leak in the static line feeding the #2 ADC.
We eventually found the leak to be caused by a cracked plastic B nut at the point where the static line feeding the #2 ADC connected to the R/H static port.
Fixing the actual problem took less than 30 minutes. Getting access to the point of failure however was another matter entirely. Six man-hours to remove the overhead ceiling panels in the entranceway to gain access to the tee fitting where the L/H and R/H static port lines joined together, (in order to isolate which side was leaking) - then an additional 35 man-hours of labor time to disassemble and remove the forward lav and galley, and then put it all back together afterward.