Narrative:

I; the first officer; performed the pre-flight and post-flight walk arounds at all stations for this flight. I performed the walk around in ZZZ and did not note any damage. We completed the paperwork; and I made sure the main cargo door was secure as normal; and then closed the L1 door. We configured for de-ice and we took type I and type iv fluids; applied by a single open-bucket truck. During the de-ice process; I did not feel any jarring impact to the aircraft. We departed and flew to ZZZ1 without incident. Upon my post-flight walk around in ZZZ1; I noticed damage to the leading edge of the left horizontal stabilizer. I immediately went back to the flight deck and verbally notified the captain and the maintenance personnel who were present.the damage to the aircraft was caused by something impacting the leading edge of the stabilizer. I do not know if the damage was caused by an impact on the ground or in-flight. I did not notice any [debris/residue] or paint in the area of the damage that would give any clues as to the cause of the damage. The shape of the dent seems to indicate that the impact was caused by something horizontal as opposed to something vertical; possibly the bucket of a de-ice truck.I suggest that crews continue exercising vigilance in their pre and post-flight walk arounds; as well as during ground servicing of the aircraft. As a new crew member; I am very cautious during my walk around inspections; and this incident reinforces the need for continued vigilance. It is also important for all ground crew members to continue to notify flight crew members of any aircraft damage that they may notice.

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Original NASA ASRS Text

Title: Boeing 737 First Officer reported that during his post flight walk around; unreported damage to the leading edge of the horizontal stabilizer was discovered.

Narrative: I; the First Officer; performed the pre-flight and post-flight walk arounds at all stations for this flight. I performed the walk around in ZZZ and did not note any damage. We completed the paperwork; and I made sure the main cargo door was secure as normal; and then closed the L1 door. We configured for de-ice and we took Type I and Type IV fluids; applied by a single open-bucket truck. During the de-ice process; I did not feel any jarring impact to the aircraft. We departed and flew to ZZZ1 without incident. Upon my post-flight walk around in ZZZ1; I noticed damage to the leading edge of the left horizontal stabilizer. I immediately went back to the flight deck and verbally notified the Captain and the maintenance personnel who were present.The damage to the aircraft was caused by something impacting the leading edge of the stabilizer. I do not know if the damage was caused by an impact on the ground or in-flight. I did not notice any [debris/residue] or paint in the area of the damage that would give any clues as to the cause of the damage. The shape of the dent seems to indicate that the impact was caused by something horizontal as opposed to something vertical; possibly the bucket of a de-ice truck.I suggest that crews continue exercising vigilance in their pre and post-flight walk arounds; as well as during ground servicing of the aircraft. As a new crew member; I am very cautious during my walk around inspections; and this incident reinforces the need for continued vigilance. It is also important for all ground crew members to continue to notify flight crew members of any aircraft damage that they may notice.

Data retrieved from NASA's ASRS site 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.