 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A fairly new C560 blows an air conditioning duct in the tail and the crew starts an emergency descent based upon the noise created at FL370, with opposite direction traffic below at FL350 near gsp, sc.
| Attributes | |
| ACN | 527022 |
| Time | |
| Date | 200110 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : ztl.artcc |
| State Reference | GA |
| Altitude | msl bound lower : 36500 msl bound upper : 37000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Citation V |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : ztl.artcc |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise : level |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 60 flight time total : 15500 flight time type : 750 |
| ASRS Report | 527022 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : required legal separation non adherence : clearance |
| Independent Detector | other controllera other flight crewa other flight crewb |
| Resolutory Action | aircraft : equipment problem dissipated flight crew : returned to assigned altitude |
| Consequence | other |
| Miss Distance | horizontal : 30000 vertical : 1500 |
| Supplementary | |
| Problem Areas | Aircraft Airspace Structure Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
While in descent from FL430, we were stopped for traffic at FL370. During this time, we heard a loud noise and air/wind noise was extremely loud, we thought we had a rapid depressurization, but it was another problem in air conditioner system/tail vent duct. This was a new aircraft 70 hours, total time. We could not talk to each other as noise was so loud. After donning masks captain started down, center and TCASII called traffic. We stopped at 36500 ft and after seeing no cabin pressure drop climbed back to FL370. Noise stopped at this time, we continued on to destination and found ruptured line in tail cone area.
Original NASA ASRS Text
Title: A FAIRLY NEW C560 BLOWS AN AIR CONDITIONING DUCT IN THE TAIL AND THE CREW STARTS AN EMER DESCENT BASED UPON THE NOISE CREATED AT FL370, WITH OPPOSITE DIRECTION TFC BELOW AT FL350 NEAR GSP, SC.
Narrative: WHILE IN DESCENT FROM FL430, WE WERE STOPPED FOR TFC AT FL370. DURING THIS TIME, WE HEARD A LOUD NOISE AND AIR/WIND NOISE WAS EXTREMELY LOUD, WE THOUGHT WE HAD A RAPID DEPRESSURIZATION, BUT IT WAS ANOTHER PROB IN AIR CONDITIONER SYS/TAIL VENT DUCT. THIS WAS A NEW ACFT 70 HRS, TOTAL TIME. WE COULD NOT TALK TO EACH OTHER AS NOISE WAS SO LOUD. AFTER DONNING MASKS CAPT STARTED DOWN, CTR AND TCASII CALLED TFC. WE STOPPED AT 36500 FT AND AFTER SEEING NO CABIN PRESSURE DROP CLIMBED BACK TO FL370. NOISE STOPPED AT THIS TIME, WE CONTINUED ON TO DEST AND FOUND RUPTURED LINE IN TAIL CONE AREA.
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.