A C208 instructor and student noticed tks fluid streaming into the cabin air vent intake during a tk...

Attributes
ACN	1163193
Time
Date	201404
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	Caravan Undifferentiated
Operating Under FAR Part	Part 135
Flight Phase	Cruise Parked
Component
Aircraft Component	Aerofoil Ice System
Person 1
Function	Instructor Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Total 7000 Flight Crew Type 3200
Events
Anomaly	Aircraft Equipment Problem Less Severe Flight Deck / Cabin / Aircraft Event Illness Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

Narrative:

Preflighted tks anti-ice system earlier. Noticed tks fluid streaming into cabin air vent intake at preflight. During training flight; pilots decided to land and take a break due to both having bad headaches. Both pilots noticed subtle tks odor; both pilots had bad headaches; and both pilots noticed hands were sticky. Tks fluid is contaminating the aircraft cockpit ventilation system. Aircraft has a sticky film inside and out from tks fluid. An msds I've seen for tks fluid; mentions wearing eye protection; gloves; etc. It warns against breathing tks fumes and coming in contact with fluid. Mentions tks fluid exposure can cause headaches; eye irritation; symptoms of intoxication; kidney damage; brain damage; etc. Also mentions fluid is flammable. Not sure how an aircraft covered in a flammable liquid that is dangerous to humans was certified for use.

Original NASA ASRS Text

Title: A C208 instructor and student noticed TKS fluid streaming into the cabin air vent intake during a TKS system preflight. Later during the training flight; both pilots developed headaches so they landed for a mid session break.

Narrative: Preflighted TKS anti-ice system earlier. Noticed TKS fluid streaming into cabin air vent intake at preflight. During training flight; pilots decided to land and take a break due to both having bad headaches. Both pilots noticed subtle TKS odor; both pilots had bad headaches; and both pilots noticed hands were sticky. TKS fluid is contaminating the aircraft cockpit ventilation system. Aircraft has a sticky film inside and out from TKS fluid. An MSDS I've seen for TKS fluid; mentions wearing eye protection; gloves; etc. It warns against breathing TKS fumes and coming in contact with fluid. Mentions TKS fluid exposure can cause headaches; eye irritation; symptoms of intoxication; kidney damage; brain damage; etc. Also mentions fluid is flammable. Not sure how an aircraft covered in a flammable liquid that is dangerous to humans was certified for use.

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.

A C208 instructor and student noticed tks fluid streaming into the cabin air vent intake during a tks system preflight. Later during the training flight; both pilots developed headaches so they landed for a mid session break.