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The pilot of a C208 reported that while operating in icing conditions; became physically affected by the use of the tks anti-ice system.
| Attributes | |
| ACN | 1340303 |
| Time | |
| Date | 201603 |
| Local Time Of Day | 1201-1800 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Caravan Undifferentiated |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Cruise |
| Component | |
| Aircraft Component | Ice/Rain Protection System |
| Person 1 | |
| Function | Pilot Flying |
| Qualification | Flight Crew Commercial Flight Crew Multiengine Flight Crew Instrument Flight Crew Flight Instructor |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Flight Deck / Cabin / Aircraft Event Illness Inflight Event / Encounter Weather / Turbulence |
Narrative:
While on climb out; I began to rapidly accumulate moderate rime icing at 6500 feet MSL at IMC conditions that continued on up to 9000 feet MSL. I activated the tks system on high to address the airframe icing after reconfirming cabin heat/defog was off.about 5 minutes after turning on tks; I noticed a burning sensation in both eyes and felt slightly disoriented as though under the effect of alcohol. Although I had checked all cabin airflow sources prior to takeoff due to anticipation of icing conditions; I immediately rechecked them and noticed the overhead air vent was not fully closed; producing a slight airflow directed towards my head. I closed the vent and coordinated a descent to MVA to get below the freezing level once clear of the restricted airspace. The burning sensation in my eyes cleared up about 5 minutes after closing the vent with the disorientation clearing about 10-15 minutes later. No other issues were noted once cabin airflow sources were cut off.modify tks system so airflow tainted with tks from either the propeller or wings is not allowed to flow into the cockpit.
Original NASA ASRS Text
Title: The pilot of a C208 reported that while operating in icing conditions; became physically affected by the use of the TKS anti-ice system.
Narrative: While on climb out; I began to rapidly accumulate moderate rime icing at 6500 feet MSL at IMC conditions that continued on up to 9000 feet MSL. I activated the TKS system on high to address the airframe icing after reconfirming cabin heat/defog was off.About 5 minutes after turning on TKS; I noticed a burning sensation in both eyes and felt slightly disoriented as though under the effect of alcohol. Although I had checked all cabin airflow sources prior to takeoff due to anticipation of icing conditions; I immediately rechecked them and noticed the overhead air vent was not fully closed; producing a slight airflow directed towards my head. I closed the vent and coordinated a descent to MVA to get below the freezing level once clear of the restricted airspace. The burning sensation in my eyes cleared up about 5 minutes after closing the vent with the disorientation clearing about 10-15 minutes later. No other issues were noted once cabin airflow sources were cut off.Modify TKS system so airflow tainted with TKS from either the propeller or wings is not allowed to flow into the cockpit.
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.