A piper arrow pilot reported experiencing strong exhaust fumes while flying with an instructor. The ...

Narrative:

My flight instructor and I were south east of the airport during a cool afternoon. We turned on the cabin heat and almost instantly we could smell exhaust. We turned off the cabin heat and cracked a window for a short while to clear out the smell; however we did leave the heat off for the remainder of the flight.we later decided to work on touch and goes. During the first two laps in the pattern; every time I pulled the throttle idle; we would smell exhaust. We left the window open and decided to call it a night. On the 3rd and final landing of the night; when I pulled the throttle to idle; the smell of exhaust was overwhelming and sickening. We taxied with the door; windows and any source of fresh air open all the way to parking. I wasn't feeling very well when I exited the aircraft so I walked over to the grass and dry heaved for about a minute. My instructor put the plane away; so I went to gather all my stuff. I was confused; felt nauseous as well as just simply felt weird. I ended up going to the hospital later that night to confirm what was making me feel weird. They drew my blood three hours after I got out of the plane and when they gave me my test results back; my blood had 2% carbon monoxide. Turns out there was a tiny exhaust leak (not even 1mm in diameter) in the heating shroud of the aircraft.

Original NASA ASRS Text

Title: A Piper Arrow pilot reported experiencing strong exhaust fumes while flying with an instructor. The flight was safely terminated; however; post flight; the pilot exhibited symptoms of carbon monoxide poisoning.

Narrative: My flight instructor and I were south east of the airport during a cool afternoon. We turned on the cabin heat and almost instantly we could smell exhaust. We turned off the cabin heat and cracked a window for a short while to clear out the smell; however we did leave the heat off for the remainder of the flight.We later decided to work on touch and goes. During the first two laps in the pattern; every time I pulled the throttle idle; we would smell exhaust. We left the window open and decided to call it a night. On the 3rd and final landing of the night; when I pulled the throttle to idle; the smell of exhaust was overwhelming and sickening. We taxied with the door; windows and any source of fresh air open all the way to parking. I wasn't feeling very well when I exited the aircraft so I walked over to the grass and dry heaved for about a minute. My instructor put the plane away; so I went to gather all my stuff. I was confused; felt nauseous as well as just simply felt weird. I ended up going to the hospital later that night to confirm what was making me feel weird. They drew my blood three hours after I got out of the plane and when they gave me my test results back; my blood had 2% carbon monoxide. Turns out there was a tiny exhaust leak (not even 1mm in diameter) in the heating shroud of the aircraft.

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	1486299
Time
Date	201709
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Dusk
Aircraft 1
Make Model Name	PA-28R Cherokee Arrow All Series
Operating Under FAR Part	Part 91
Component
Aircraft Component	Exhaust Manifold
Person 1
Function	Pilot Flying
Qualification	Flight Crew Private Flight Crew Instrument
Experience	Flight Crew Last 90 Days 31 Flight Crew Total 171 Flight Crew Type 1
Events
Anomaly	Aircraft Equipment Problem Critical Flight Deck / Cabin / Aircraft Event Illness Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

A piper arrow pilot reported experiencing strong exhaust fumes while flying with an instructor. The flight was safely terminated; however; post flight; the pilot exhibited symptoms of carbon monoxide poisoning.