AW139 question
I am currently in Vergiate conducting the acceptance on our first AW139 (long nose) for Saudi Aramco. On our first flight I noticed an "in and out" roaring / vibration coming from the front of the aircraft. The test pilot also commented on it. The next day, we installed the FLIR, which is mounted in front of the nose landing gear and noticed that the roaring / vibration was not present. We were flying at the same airspeeds.
I was wondering if anyone else has noticed this. We do have the nose landing gear doors removed. It starts at around 130 KIAS and gets worse as speed increases.
Any comments would be appreciated.
Rennie