<< >> NASA ASRS Report 1173626, May 2014

On the first flight for aircraft after maintenance was performed; a B737-700 first officer experiences a cabin altitude warning horn passing through 10;000 ft. The aircraft is leveled and the pressurization control switch is found in the manual position. After restoring pressurization and switching to auto; the flight continues to destination.

Attributes
ACN	1173626
Time
Date	201405
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.TRACON
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	Pressurization Control System
Person 1
Function	First Officer
Experience	Flight Crew Last 90 Days 88
Events
Anomaly	Deviation - Procedural Published Material / Policy

Narrative:

It was first flight for aircraft after maintenance was performed. On climbout and passing through 10;000 ft; received auditory warning for cabin pressurization. Looked at pressurization readout and saw cabin altitude was 10;000 ft. Performed immediate action items: donned oxygen masks: on 100% and crew communications: established. Ran through the checklist and saw switch was in manual. Manually closed outflow and closed outflow valve to get cabin altitude below 10;000 ft and then switched to auto. Cabin pressurized normally and continued flight. We momentarily leveled off at 10;000 ft while running checklist and pressurizing cabin. After checklist complete and pressurization complete climbed to cruise altitude. Better checklist adherence and confirmation of items during checklist challenge and response.

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Original NASA ASRS Text

Title: On the first flight for aircraft after maintenance was performed; a B737-700 First Officer experiences a cabin altitude warning horn passing through 10;000 FT. The aircraft is leveled and the pressurization control switch is found in the manual position. After restoring pressurization and switching to auto; the flight continues to destination.

Narrative: It was first flight for aircraft after maintenance was performed. On climbout and passing through 10;000 FT; received auditory warning for cabin pressurization. Looked at pressurization readout and saw cabin altitude was 10;000 FT. Performed immediate action items: donned oxygen masks: On 100% and crew communications: Established. Ran through the checklist and saw switch was in manual. Manually closed outflow and closed outflow valve to get cabin altitude below 10;000 FT and then switched to auto. Cabin pressurized normally and continued flight. We momentarily leveled off at 10;000 FT while running checklist and pressurizing cabin. After checklist complete and pressurization complete climbed to cruise altitude. Better checklist adherence and confirmation of items during checklist challenge and response.

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.