Air carrier large transport made a takeoff without turning on the air conditioning pacs. Cabin altit...

Attributes
ACN	80641
Time
Date	198801
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : msp
State Reference	MN
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zmp tower : msp
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : takeoff climbout : intermediate altitude ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 12800 flight time type : 800
ASRS Report	80641
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : flight engineer pilot : instrument pilot : cfi
Experience	flight time last 90 days : 200 flight time total : 6000 flight time type : 700
ASRS Report	80859
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

Flight engineer had forgotten to put on air conditioning packs on the ground before takeoff. Climbing through 10000' we received the intermittent horn. We checked items up front and found nothing. Looking back we noticed the packs were not on. I told flight engineer to put one on immediately. Copilot was flying, I told him to level off. We were at 11000', clrd to climb to 17000'. I informed center that we would be maintaining 11000' for a minute or so. They said to keep them informed if we had a problem. I chose to keep radio talk to a minimum as we still had the horn blasting in our ears. I believe that I was given a radio change. I turned around and asked the flight engineer to silence the horn. We were more concerned with solving the problem itself as we should have been, but next time the horn will come sooner. The flight engineer was proceeding with pack reinstatement. As we approached safe cabin altitude I told the flight engineer to squeak down the rate. I handled it in this manner because we were right at the edge of our parameters. I saw no need to make an emergency des down to 10000', shooting off my foot to step on an ant. The reinstated packs were bringing it down. We wanted to proceed calmly and did not want to bust eardrums in the cabin with no cause. Supplemental information from acn 80995: 2 mins prior to takeoff, just after starting the last engine and prior to completing takeoff checks, load information arrived via ACARS. The aircraft was 8000 pounds, lighter than planned. A lengthy discussion occurred about takeoff power and whether or not we were legal or needed new takeoff information (v-spds). The aircraft was now #1 for takeoff and the remaining checklist was rushed, missing pressurization. Crew allowed itself to be rushed through checklist and failed to doublechk when time permitted.

Original NASA ASRS Text

Title: ACR LGT MADE A TKOF WITHOUT TURNING ON THE AIR CONDITIONING PACS. CABIN ALT WARNING HORN SOUNDED AT 10000' AND THE FLT CREW LEVELED THE ACFT UNTIL THE CABIN COULD BE PRESSURIZED. ARTCC WAS NOTIFIED THAT A TEMPORARY LEVEL OFF WAS NECESSARY.

Narrative: FE HAD FORGOTTEN TO PUT ON AIR CONDITIONING PACKS ON THE GND BEFORE TKOF. CLBING THROUGH 10000' WE RECEIVED THE INTERMITTENT HORN. WE CHKED ITEMS UP FRONT AND FOUND NOTHING. LOOKING BACK WE NOTICED THE PACKS WERE NOT ON. I TOLD FE TO PUT ONE ON IMMEDIATELY. COPLT WAS FLYING, I TOLD HIM TO LEVEL OFF. WE WERE AT 11000', CLRD TO CLB TO 17000'. I INFORMED CENTER THAT WE WOULD BE MAINTAINING 11000' FOR A MINUTE OR SO. THEY SAID TO KEEP THEM INFORMED IF WE HAD A PROB. I CHOSE TO KEEP RADIO TALK TO A MINIMUM AS WE STILL HAD THE HORN BLASTING IN OUR EARS. I BELIEVE THAT I WAS GIVEN A RADIO CHANGE. I TURNED AROUND AND ASKED THE FE TO SILENCE THE HORN. WE WERE MORE CONCERNED WITH SOLVING THE PROB ITSELF AS WE SHOULD HAVE BEEN, BUT NEXT TIME THE HORN WILL COME SOONER. THE FE WAS PROCEEDING WITH PACK REINSTATEMENT. AS WE APCHED SAFE CABIN ALT I TOLD THE FE TO SQUEAK DOWN THE RATE. I HANDLED IT IN THIS MANNER BECAUSE WE WERE RIGHT AT THE EDGE OF OUR PARAMETERS. I SAW NO NEED TO MAKE AN EMER DES DOWN TO 10000', SHOOTING OFF MY FOOT TO STEP ON AN ANT. THE REINSTATED PACKS WERE BRINGING IT DOWN. WE WANTED TO PROCEED CALMLY AND DID NOT WANT TO BUST EARDRUMS IN THE CABIN WITH NO CAUSE. SUPPLEMENTAL INFORMATION FROM ACN 80995: 2 MINS PRIOR TO TKOF, JUST AFTER STARTING THE LAST ENG AND PRIOR TO COMPLETING TKOF CHKS, LOAD INFO ARRIVED VIA ACARS. THE ACFT WAS 8000 LBS, LIGHTER THAN PLANNED. A LENGTHY DISCUSSION OCCURRED ABOUT TKOF PWR AND WHETHER OR NOT WE WERE LEGAL OR NEEDED NEW TKOF INFO (V-SPDS). THE ACFT WAS NOW #1 FOR TKOF AND THE REMAINING CHKLIST WAS RUSHED, MISSING PRESSURIZATION. CREW ALLOWED ITSELF TO BE RUSHED THROUGH CHKLIST AND FAILED TO DOUBLECHK WHEN TIME PERMITTED.

Data retrieved from NASA's ASRS site as of August 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.

Air carrier large transport made a takeoff without turning on the air conditioning pacs. Cabin altitude warning horn sounded at 10000' and the flight crew leveled the aircraft until the cabin could be pressurized. ARTCC was notified that a temporary level off was necessary.