Narrative:

The entire flight was routine until we parked at the gate. Upon shutdown of the aircraft; the captain informed me that bleed leak detection test was not producing a duct test ok advisory message. He said something about the anti-ice test ok was not present either. He turned the duct mon switch to test and said we should be getting an advisory message. I ask him to turn the duct mon switch again while I selected the a/ice page on the EICAS control panel. All indications were red except the right wing. The captain calls maintenance and tells them he is not getting the anti-ice test ok advisory or the duct test ok advisory. Maintenance says they are on their way. I did the post flight and ran into the mechanic while doing so. The mechanic asked me why was the malfunction not written up in the log. I responded; I don't know but I can go find the captain that he is probably in operations. So; I ended up taking the maintenance log into operations were I found the captain and told him the mechanic requested that he write the aircraft up. He responded; 'why can't he write the damn thing up'. The captain filled in the log and I took it back to the mechanic. He said the plane was heading to the hanger and that it's right leading edge had to completely come off; something about 21 sensors had to be tested.thinking back; I realize now that the captain did not bring up any issue with the bleed leak detection test until we were at the gate. I know this is part of the originating check; but why was the captain checking it on the post flight; more importantly; why was the test failing. A big concern of mine is that the weather system that moved through overnight was strong and produced tornadoes. We flew through that same weather system on our way back; this bothers me. I don't know if the plane's anti-ice system was working properly or not. I read the originating checklist and the captain responded to all as being satisfactory.I just find it suspicious that the captain found the fault after the shutdown. And beyond that we could not MEL or continue with the plane. So was the plane flown faulty or not? I do not know the answer to this question. Am I assuming something about the captain that I should not? If so; I honestly hope my assumptions are wrong and safety was not compromised.

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Original NASA ASRS Text

Title: After the first flight of the day; a CRJ200 First Officer is informed by his Captain that the aircraft has failed a duct test and will need maintenance. Maintenance is called and the aircraft is taken out of service. The First Officer is suspicious since this test is normally only performed during the first preflight of the day.

Narrative: The entire flight was routine until we parked at the gate. Upon shutdown of the aircraft; the Captain informed me that Bleed Leak detection test was not producing a DUCT TEST OK advisory message. He said something about the anti-ice test ok was not present either. He turned the DUCT MON switch to TEST and said we should be getting an advisory message. I ask him to turn the DUCT MON switch again while I selected the A/ICE page on the EICAS control panel. All indications were red except the right wing. The Captain calls Maintenance and tells them he is not getting the anti-ice test ok advisory or the DUCT TEST OK advisory. Maintenance says they are on their way. I did the post flight and ran into the mechanic while doing so. The mechanic asked me why was the malfunction not written up in the log. I responded; I don't know but I can go find the Captain that he is probably in Operations. So; I ended up taking the maintenance log into Operations were I found the Captain and told him the mechanic requested that he write the aircraft up. He responded; 'why can't he write the damn thing up'. The Captain filled in the log and I took it back to the mechanic. He said the plane was heading to the hanger and that it's right leading edge had to completely come off; something about 21 sensors had to be tested.Thinking back; I realize now that the Captain did not bring up any issue with the Bleed Leak detection test until we were at the gate. I know this is part of the Originating Check; but why was the Captain checking it on the post flight; more importantly; why was the test failing. A big concern of mine is that the weather system that moved through overnight was strong and produced tornadoes. We flew through that same weather system on our way back; this bothers me. I don't know if the plane's anti-ice system was working properly or not. I read the originating checklist and the Captain responded to all as being satisfactory.I just find it suspicious that the Captain found the fault after the shutdown. And beyond that we could not MEL or continue with the plane. So was the plane flown faulty or not? I do not know the answer to this question. Am I assuming something about the Captain that I should not? If so; I honestly hope my assumptions are wrong and safety was not compromised.

Data retrieved from NASA's ASRS site as of April 2012 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.