Engines are certified to resist selected component egression through the engine cases. Kevlar banding around the Fan section has been very successful in coping with catastrophic fan blade failure. The engine cores are a different story however, although compressor blade failures do not normally...
I would want to know if the remains show more than one bird per engine. I would be concerned if one bird per engine caused shutdown. Does anyone know the weight of the bird used for the Cert test (5 or 10 Lbs)?
80 deg C Margin??? Is there any info related to hours in service? Is this only happening on climb-out under certain ambient conditions below ten thousand (250 Knot Restriction)? I’m a little curious about how an AD gets issued on this problem without these particular engines being removed, torn...
The engines on this aircraft are result of the engineering and manufacturing expertise of P&W and Rolls Royce. Both of these companies have a reputation for building robust engines that take “Compressor Stalls” in stride. By the way a Compressor stall is generally associated with inlet airflow...
“If the FIM says to Megger, then there should be a corresponding AMM or other reference on preparing the tank for such an operation (maybe even referenced in the FIM?) such that the safety issues are addressed.[eng300]”
The above says it all. Nitrogen purge during the test should be mandatory...
You really might want to consider an optical method. Most of these leaks take place at the V-band clamp joints, the reason being that mechanics over tighten the band clamps and the working high temperature environment cause the v-band clamp to take a set or stretch if you will. When these clamps...
My two cents… I think your making a big mistake! You might be decreasing the elastic response behavior of the wing as a whole which may in turn increase the local stresses where the other wing shape components attach to the spar system. Who designed this aircraft and what is their background! I...
