Narrative:

Prior to this flight; the captain said he hadn't flown since june; except for a training event at the training center. I had the previous month off; with the exception of a ZZZ2 turn; in which I flew one leg. The aircraft had a complicated description of the deferred number two engine cowl valve stuck open write up. Due to this write up; the number two bleed valve was placarded. Since this was the first ETOPS flight in many months for both the captain and myself; I handled all the pre-flight duties while the captain questioned ZZZ station maintenance about the write up. He did this on comm 2; which I had tuned on speaker; so I could try and stay in the loop. The captain questioned station maintenance twice as to leaving the number two bleed off for flight; and then he instructed me as such. We departed and climbed normally to cruise flight. During the climb I was busy as pm; preparing all that is required for the ETOPS segment; and was having difficulty contacting ZZZ radio on HF (bad HF day). We eventually re-established radio contact with ZZZ [TRACON] to ask for current HF frequencies; after trying all comm frequencies on the jepp enroute comm section. During this time; an ACARS message came across the printer concerning the bleed configuration. I was very busy; and tore it from the printer and handed it directly to the captain.once we established cruise flight and handled all the ETOPS requirements; I again reviewed the limitations section of the FM; the ACARS message; and the maintenance release. The maintenance release printed off the ACARS printer (at the gate) such that the four sections of it were not sequential. With two separate; but related write ups; this made reading the maintenance release difficult and confusing. Once I realized that we had configured the bleed system incorrectly; I immediately brought it to the captain's attention. At first he was hesitant to reconfigure the system. When I showed him the limitation section and cross referenced it with the maintenance release; the logic of reconfiguring the system was clear; and we did so.we continued the flight uneventfully and de-briefed per SOP.

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Original NASA ASRS Text

Title: Air Carrier flight crew reported they had configured the bleed air system incorrectly before takeoff.

Narrative: Prior to this flight; the Captain said he hadn't flown since June; except for a training event at the training center. I had the previous month off; with the exception of a ZZZ2 turn; in which I flew one leg. The aircraft had a complicated description of the deferred number two engine cowl valve stuck open write up. Due to this write up; the number two bleed valve was placarded. Since this was the first ETOPS flight in many months for both the Captain and myself; I handled all the pre-flight duties while the Captain questioned ZZZ station maintenance about the write up. He did this on comm 2; which I had tuned on speaker; so I could try and stay in the loop. The Captain questioned station maintenance twice as to leaving the number two bleed off for flight; and then he instructed me as such. We departed and climbed normally to cruise flight. During the climb I was busy as PM; preparing all that is required for the ETOPS segment; and was having difficulty contacting ZZZ Radio on HF (bad HF day). We eventually re-established radio contact with ZZZ [TRACON] to ask for current HF frequencies; after trying all comm frequencies on the Jepp enroute Comm section. During this time; an ACARS message came across the printer concerning the bleed configuration. I was very busy; and tore it from the printer and handed it directly to the Captain.Once we established cruise flight and handled all the ETOPS requirements; I again reviewed the limitations section of the FM; the ACARS message; and the maintenance release. The maintenance release printed off the ACARS printer (at the gate) such that the four sections of it were not sequential. With two separate; but related write ups; this made reading the maintenance release difficult and confusing. Once I realized that we had configured the bleed system incorrectly; I immediately brought it to the Captain's attention. At first he was hesitant to reconfigure the system. When I showed him the limitation section and cross referenced it with the maintenance release; the logic of reconfiguring the system was clear; and we did so.We continued the flight uneventfully and de-briefed per SOP.

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.