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C560 flight crew execute an emergency descent from FL330 after ZFW advises they are unable to issue further descent due to proximity of other traffic.
| Attributes | |
| ACN | 522905 |
| Time | |
| Date | 200108 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| State Reference | TX |
| Altitude | msl single value : 39000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zfw.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Citation V |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : enroute altitude change descent : intermediate altitude |
| Route In Use | arrival star : ns |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zfw.artcc |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 75 flight time total : 4000 flight time type : 408 |
| ASRS Report | 522905 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 6000 flight time type : 160 |
| ASRS Report | 522681 |
| Events | |
| Anomaly | aircraft equipment problem : critical conflict : airborne less severe |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | aircraft : equipment problem dissipated flight crew : took evasive action flight crew : declared emergency |
| Supplementary | |
| Problem Areas | Environmental Factor Aircraft ATC Human Performance |
| Primary Problem | Aircraft |
Narrative:
En route from msy (new orleans) to ads (dallas-addison) at FL390, we had an indication of a pressurization problem during the initiation of a descent to FL330. We informed ZFW of the problem and requested a lower altitude. Center was unable to clear us below FL330. I declared an emergency with ATC while performing the emergency descent checklist. Oxygen masks were donned and an emergency descent was commenced to 10000 ft MSL. At 10000 ft MSL, we canceled the emergency and continued to destination airport ads. With the noise of the oxygen masks and emergency pressurization, it was difficult to communicate to ATC as well as hear ATC's communications and clrncs. Supplemental information from acn 522681: came 3 SM within another while executing an emergency descent.
Original NASA ASRS Text
Title: C560 FLC EXECUTE AN EMER DSCNT FROM FL330 AFTER ZFW ADVISES THEY ARE UNABLE TO ISSUE FURTHER DSCNT DUE TO PROX OF OTHER TFC.
Narrative: ENRTE FROM MSY (NEW ORLEANS) TO ADS (DALLAS-ADDISON) AT FL390, WE HAD AN INDICATION OF A PRESSURIZATION PROB DURING THE INITIATION OF A DSCNT TO FL330. WE INFORMED ZFW OF THE PROB AND REQUESTED A LOWER ALT. CTR WAS UNABLE TO CLR US BELOW FL330. I DECLARED AN EMER WITH ATC WHILE PERFORMING THE EMER DSCNT CHKLIST. OXYGEN MASKS WERE DONNED AND AN EMER DSCNT WAS COMMENCED TO 10000 FT MSL. AT 10000 FT MSL, WE CANCELED THE EMER AND CONTINUED TO DEST ARPT ADS. WITH THE NOISE OF THE OXYGEN MASKS AND EMER PRESSURIZATION, IT WAS DIFFICULT TO COMMUNICATE TO ATC AS WELL AS HEAR ATC'S COMS AND CLRNCS. SUPPLEMENTAL INFO FROM ACN 522681: CAME 3 SM WITHIN ANOTHER WHILE EXECUTING AN EMER DSCNT.
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.