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A return land mandated when air carrier large transport loses control over cabin pressurization. Weight and balance considerations in overweight landing.
| Attributes | |
| ACN | 245948 |
| Time | |
| Date | 199307 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : bce |
| State Reference | UT |
| Altitude | msl bound lower : 28000 msl bound upper : 30000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zlc tower : pit |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude landing other other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 18000 flight time type : 210 |
| ASRS Report | 245948 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 225 flight time total : 14000 flight time type : 5000 |
| ASRS Report | 245946 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
On climb out to cruise altitude, we lost control of pressurization. We tried everything in our manual to keep cabin altitude from exceeding 10000 ft. When it was apparent that this was going to be impossible, I called dispatch and got released to las. My landing weight was 153700 lbsþan overweight landing. However, since this model was originally certified to land 154500, I felt it was a better decision to land at this weight than to dump fuel. Supplemental information from acn 245946: en route we discussed whether to make a 3000 pound overweight landing or dump fuel. To save fuel and time, the captain decided to do the overweight landing into las, which was uneventful. No emergency was declared due to not being in a state of emergency.
Original NASA ASRS Text
Title: A RETURN LAND MANDATED WHEN ACR LGT LOSES CTL OVER CABIN PRESSURIZATION. WT AND BAL CONSIDERATIONS IN OVERWT LNDG.
Narrative: ON CLBOUT TO CRUISE ALT, WE LOST CTL OF PRESSURIZATION. WE TRIED EVERYTHING IN OUR MANUAL TO KEEP CABIN ALT FROM EXCEEDING 10000 FT. WHEN IT WAS APPARENT THAT THIS WAS GOING TO BE IMPOSSIBLE, I CALLED DISPATCH AND GOT RELEASED TO LAS. MY LNDG WT WAS 153700 LBSþAN OVERWT LNDG. HOWEVER, SINCE THIS MODEL WAS ORIGINALLY CERTIFIED TO LAND 154500, I FELT IT WAS A BETTER DECISION TO LAND AT THIS WT THAN TO DUMP FUEL. SUPPLEMENTAL INFO FROM ACN 245946: ENRTE WE DISCUSSED WHETHER TO MAKE A 3000 LB OVERWT LNDG OR DUMP FUEL. TO SAVE FUEL AND TIME, THE CAPT DECIDED TO DO THE OVERWT LNDG INTO LAS, WHICH WAS UNEVENTFUL. NO EMER WAS DECLARED DUE TO NOT BEING IN A STATE OF EMER.
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.