Narrative:

The airplane had the rh pack deferred per MEL 21-51-01-2. While climbing through 15;000 ft we received the left bleed duct red warning message; followed by the left bleed duct caution message. We stopped our climb and ran the QRH procedure; which required us to shut down the lh pack. This put us in a unpressurized flight situation. We followed the pressurization-unpressurized flight procedure of the QRH. We descended back to 10;000 ft. We contacted mtx control and dispatch through operations. They requested we continue to destination and sent us flight planning performance numbers for a cruise altitude of 10;000 ft. After conferring with the crew we deemed it safe to continue. This problem caused some confusion because of the way the poh and QRH deal with unpressurized flight procedures. MEL 21-51-01-2 should also reference this possible situation; it says 'note' for a one pack operation; if the remaining pack causes the presentation of the left(right) pack temperature and/or left(right) pack caution message on the EICAS primary display; perform unpressurized flight procedure as per the QRH. Furthermore if a reference is made to the QRH it should at least name the correct procedure. In QRH messages; there is no 'unpressurized flight procedure'; it is under pressurization- unpressurized flight procedure. To make matters more confusing; there are unpressurized take off and landing procedures in the poh that are not mentioned at all in the QRH procedure. The QRH pressurization-unpressurized flight procedure should at least reference the supplemental procedures in the poh and vice versa. We shouldn't have to look in 3 different places (while flying) to determine if we are following all company procedures and policy for one unplanned flight situation.

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Original NASA ASRS Text

Title: Regional Jet Captain laments the difficulty of locating unpressurized flight procedures after being dispatched with one pack inoperative and having a bleed air fault requiring this procedure.

Narrative: The airplane had the RH Pack deferred per MEL 21-51-01-2. While climbing through 15;000 ft we received the L BLEED DUCT Red Warning MSG; followed by the L BLEED DUCT Caution MSG. We stopped our climb and ran the QRH procedure; which required us to shut down the LH pack. This put us in a unpressurized flight situation. We followed the Pressurization-Unpressurized Flight procedure of the QRH. We descended back to 10;000 ft. We contacted MTX control and Dispatch through operations. They requested we continue to destination and sent us flight planning performance numbers for a cruise altitude of 10;000 ft. After conferring with the crew we deemed it safe to continue. This problem caused some confusion because of the way the POH and QRH deal with unpressurized flight procedures. MEL 21-51-01-2 Should also reference this possible situation; it says 'Note' for a one pack operation; if the remaining pack causes the presentation of the L(R) PACK TEMP and/or L(R) PACK Caution message on the EICAS primary display; perform unpressurized flight procedure as per the QRH. Furthermore if a Reference is made to the QRH it should at least name the correct procedure. In QRH messages; there is no 'unpressurized flight procedure'; it is under Pressurization- unpressurized flight procedure. To make matters more confusing; there are unpressurized take off and landing procedures in the POH that are not mentioned at all in the QRH procedure. The QRH Pressurization-unpressurized flight procedure should at least reference the supplemental procedures in the POH and vice versa. We shouldn't have to look in 3 different places (while flying) to determine if we are following all company procedures and policy for one unplanned flight situation.

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.