Emb-175 first officer reported the aircraft had been flown for a week with damage caused by a tailst...

Narrative:

I was informed that the aircraft had been operating in an unairworthy condition for a week; when the damage was first observed. The damage was to a wi-fi antenna and fuel drain mast in the rear of the aircraft. The crew that initially [experienced] the tailstrike did not recognize the strike.the original cause of the event was a tailstrike that went unnoticed by the crew. The aircraft went 7 days in operation before the damage was noticed. Contributing factors might include cold weather operations leading to rushed pre and post flights; subtle damage which was difficult to notice; and post flight inspection complacency.emphasis of pre and post flight diligence and duties during training. Tailstrike training and training focused on how to recognize the potential subtle cues and specific ways to identify antenna damage which could be a symptom of a tailstrike. Possible required inspections if the aircraft was flared during landing past a specific angle; where tailstrike possibility increases significantly.

Original NASA ASRS Text

Title: EMB-175 First Officer reported the aircraft had been flown for a week with damage caused by a tailstrike event. Reportedly; the original flight crew involved in the tailstrike was not aware of the event.

Narrative: I was informed that the aircraft had been operating in an unairworthy condition for a week; when the damage was first observed. The damage was to a wi-fi antenna and fuel drain mast in the rear of the aircraft. The crew that initially [experienced] the tailstrike did not recognize the strike.The original cause of the event was a tailstrike that went unnoticed by the crew. The aircraft went 7 days in operation before the damage was noticed. Contributing factors might include cold weather operations leading to rushed pre and post flights; subtle damage which was difficult to notice; and post flight inspection complacency.Emphasis of pre and post flight diligence and duties during training. Tailstrike training and training focused on how to recognize the potential subtle cues and specific ways to identify antenna damage which could be a symptom of a tailstrike. Possible required inspections if the aircraft was flared during landing past a specific angle; where tailstrike possibility increases significantly.

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.

Attributes
ACN	1598728
Time
Date	201811
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	EMB ERJ 170/175 ER/LR
Operating Under FAR Part	Part 121
Flight Phase	Parked
Flight Plan	IFR
Component
Aircraft Component	Fuel Drain
Person 1
Function	First Officer
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural FAR Deviation - Procedural Published Material / Policy Ground Event / Encounter Ground Strike - Aircraft

Emb-175 first officer reported the aircraft had been flown for a week with damage caused by a tailstrike event. Reportedly; the original flight crew involved in the tailstrike was not aware of the event.