The first officer of a cargo flight noticed his carbon monoxide monitor alerting at a 0.5 to 0.7 lev...

Attributes
ACN	1135196
Time
Date	201312
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Make Model Name	Widebody Transport
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Component
Aircraft Component	Air Conditioning Distribution System
Person 1
Function	Pilot Not Flying First Officer
Events
Anomaly	Deviation - Procedural Published Material / Policy Flight Deck / Cabin / Aircraft Event Other / Unknown Ground Event / Encounter Other / Unknown

Narrative:

[We were] required to wear C02 monitor due to dry ice waiver. During de-icing operations with packs off; the monitor alarm began to chirp. I donned the O2 mask and noticed the level on the monitor as 0.5 and climbing to 0.7. Both the captain and I stayed on O2 for approximately 20 minutes during the duration of de-icing. After confirmation from ground support that the deicing procedure was complete; I turned the packs on per the QRH and the CO2 alarm subsided approximately 1 minute later. The captain called the duty officer for protocol guidance regarding the event and we were advised that we were 'probably ok' to continue. We resumed the flight. Unfortunately; we have no idea to determine the levels of CO2 in the cockpit and our exposure levels. We followed the published bulletin relating to the CO2. Better guidance and knowledge from flight safety regarding our susceptibility of the types of exposure risks pertaining to hazardous materials.

Original NASA ASRS Text

Title: The First Officer of a cargo flight noticed his carbon monoxide monitor alerting at a 0.5 to 0.7 level during de-ice operations with the Packs OFF and dry ice onboard. The crew used oxygen for about 20 minutes until the Packs were ON again.

Narrative: [We were] required to wear C02 monitor due to dry ice waiver. During de-icing operations with packs off; the monitor alarm began to chirp. I donned the O2 mask and noticed the level on the monitor as 0.5 and climbing to 0.7. Both the Captain and I stayed on O2 for approximately 20 minutes during the duration of de-icing. After confirmation from ground support that the deicing procedure was complete; I turned the packs on per the QRH and the CO2 alarm subsided approximately 1 minute later. The Captain called the Duty Officer for protocol guidance regarding the event and we were advised that we were 'probably OK' to continue. We resumed the flight. Unfortunately; we have no idea to determine the levels of CO2 in the cockpit and our exposure levels. We followed the published bulletin relating to the CO2. Better guidance and knowledge from flight safety regarding our susceptibility of the types of exposure risks pertaining to hazardous materials.

Data retrieved from NASA's ASRS site as of July 2013 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.

The first officer of a cargo flight noticed his carbon monoxide monitor alerting at a 0.5 to 0.7 level during de-ice operations with the packs off and dry ice onboard. The crew used oxygen for about 20 minutes until the packs were on again.