Narrative:

During flight about 100 miles north of destination we started accumulating ice. After about 4 min. We realized we needed a descent to get out of the now moderate becoming severe ice. Upon descent we heard propeller ice being shed with the deice equipment being used. Upon landing I did not notice any damage on the aircraft fuselage from the shedding. On the remainder of my walk around I did not notice anything out of place on the rest of the aircraft. During a crew change; a replacement crewmember noted that the top part of the antenna on top of the aircraft in line with the prop was missing with residual damage on the right hand inside engine cowling. We did not have any radio problems on the second flight; but assume that the damage was a result of the icing encountered. The event occurred due to route of flight that was not known to have such heavy amounts of icing associated with it.

Related reports:

Google
 

Original NASA ASRS Text

Title: DHC-8 Captain reports encountering moderate to severe icing in cruise when only light to moderate was forecast. Crew descended out of icing conditions and landed safely at destination. Damage was later discovered from propeller ice to an antenna and the right inside engine cowl.

Narrative: During flight about 100 miles north of destination we started accumulating ice. After about 4 min. we realized we needed a descent to get out of the now moderate becoming severe ice. Upon descent we heard propeller ice being shed with the deice equipment being used. Upon landing I did not notice any damage on the aircraft fuselage from the shedding. On the remainder of my walk around I did not notice anything out of place on the rest of the aircraft. During a crew change; a replacement crewmember noted that the top part of the antenna on top of the aircraft in line with the prop was missing with residual damage on the right hand inside engine cowling. We did not have any radio problems on the second flight; but assume that the damage was a result of the icing encountered. The event occurred due to route of flight that was not known to have such heavy amounts of icing associated with it.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.