Passenger masks drop on air carrier aircraft due flight crew failing to turn on pressurization packs...

Attributes
ACN	463331
Time
Date	200002
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : dqn.vortac
State Reference	OH
Altitude	msl bound lower : 10000 msl bound upper : 13500
Environment
Flight Conditions	IMC
Weather Elements	Fog Ice
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Operating Under FAR Part	Part 119
Flight Phase	climbout : intermediate altitude
Route In Use	departure : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : multi engine
Experience	flight time last 90 days : 250 flight time total : 4500 flight time type : 750
ASRS Report	463331
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 240 flight time total : 9500 flight time type : 1200
ASRS Report	463328
Events
Anomaly	aircraft equipment problem : less severe non adherence : published procedure
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : overcame equipment problem
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

The aircraft failed to pressurize. We took off out of cincinnati international airport and at 10000 ft realized something was wrong with the pressurization. We stopped our climb and began a descent running through our checklists and leveling off at 10000 ft. There was no emergency declared and everyone was fine. The oxygen masks did deploy in-flight. After going through all the checklists we realized the packs were still left off. We turned them on and everything went back to normal. There was no injuries and no damage to the aircraft except for deployment of the oxygen masks. The aircraft was reconfigured differently than what was briefed and the packs were missed as they are not in the checklist. Supplemental information from acn 463328: aircraft air supply set up by first officer as an APU inoperative situation after briefed on using APU air for the air supply. First officer unable to stop climb before 13000 ft and passenger oxygen mask deployed. After completion of checklist noticed that #1 and #2 packs were not on. Turned packs on and pressurization was normal. First factor that must have had an effect on the situation was the first officer setting up the air supply not as briefed. The checklist, specifically the after takeoff checklist, does not have the packs referred to.

Original NASA ASRS Text

Title: PAX MASKS DROP ON ACR ACFT DUE FLC FAILING TO TURN ON PRESSURIZATION PACKS.

Narrative: THE ACFT FAILED TO PRESSURIZE. WE TOOK OFF OUT OF CINCINNATI INTL ARPT AND AT 10000 FT REALIZED SOMETHING WAS WRONG WITH THE PRESSURIZATION. WE STOPPED OUR CLB AND BEGAN A DSCNT RUNNING THROUGH OUR CHKLISTS AND LEVELING OFF AT 10000 FT. THERE WAS NO EMER DECLARED AND EVERYONE WAS FINE. THE OXYGEN MASKS DID DEPLOY INFLT. AFTER GOING THROUGH ALL THE CHKLISTS WE REALIZED THE PACKS WERE STILL LEFT OFF. WE TURNED THEM ON AND EVERYTHING WENT BACK TO NORMAL. THERE WAS NO INJURIES AND NO DAMAGE TO THE ACFT EXCEPT FOR DEPLOYMENT OF THE OXYGEN MASKS. THE ACFT WAS RECONFIGURED DIFFERENTLY THAN WHAT WAS BRIEFED AND THE PACKS WERE MISSED AS THEY ARE NOT IN THE CHKLIST. SUPPLEMENTAL INFO FROM ACN 463328: ACFT AIR SUPPLY SET UP BY FO AS AN APU INOP SIT AFTER BRIEFED ON USING APU AIR FOR THE AIR SUPPLY. FO UNABLE TO STOP CLB BEFORE 13000 FT AND PAX OXYGEN MASK DEPLOYED. AFTER COMPLETION OF CHKLIST NOTICED THAT #1 AND #2 PACKS WERE NOT ON. TURNED PACKS ON AND PRESSURIZATION WAS NORMAL. FIRST FACTOR THAT MUST HAVE HAD AN EFFECT ON THE SIT WAS THE FO SETTING UP THE AIR SUPPLY NOT AS BRIEFED. THE CHKLIST, SPECIFICALLY THE AFTER TKOF CHKLIST, DOES NOT HAVE THE PACKS REFERRED TO.

Data retrieved from NASA's ASRS site as of July 2007 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.