Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe
Flight Crew Diverted; Flight Crew Landed As Precaution
Aircraft
While cruising at 28;000 feet and an estimated 300 KIAS; the left wing rubber seal located on the top of the wing root came loose causing a loud and rapid onset vibration. I immediately reduced power to slow and we determined that a divert was the best course of action to take. I made a slow speed (approximately 200 KIAS) and mild rate of descent which resulted in an uneventful landing.The post flight inspection initially did not reveal any damage to the rubber seal; only after fairly close inspection were we able to see the seal had come loose about half way back from the leading edge. The seal separated for an estimated 3 feet; but without airflow over the wing; it appeared nearly normal.My suggestion is to pass along to other Hawker crew members that a very close inspection of the seal may be in order to determine if it is still entirely secured to the wing.
HS-125-800XPC Captain reported the left wing rubber wing root seal came loose in flight.