37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Attributes | |
ACN | 584324 |
Time | |
Date | 200306 |
Day | Mon |
Local Time Of Day | 1801 To 2400 |
Place | |
State Reference | TX |
Altitude | msl single value : 37000 |
Environment | |
Flight Conditions | IMC |
Weather Elements | Thunderstorm Turbulence other |
Light | Dusk |
Aircraft 1 | |
Controlling Facilities | artcc : zab.artcc tower : cae.tower |
Operator | common carrier : air carrier |
Make Model Name | A319 |
Operating Under FAR Part | Part 121 |
Flight Phase | cruise : level |
Flight Plan | IFR |
Person 1 | |
Affiliation | company : air carrier |
Function | flight crew : first officer |
Qualification | pilot : multi engine pilot : instrument pilot : commercial pilot : atp |
Experience | flight time last 90 days : 240 flight time total : 6000 flight time type : 3000 |
ASRS Report | 584324 |
Person 2 | |
Affiliation | company : air carrier |
Function | flight crew : captain oversight : pic |
Events | |
Anomaly | aircraft equipment problem : critical altitude deviation : excursion from assigned altitude inflight encounter : turbulence inflight encounter : weather inflight encounter other other anomaly other anomaly |
Independent Detector | aircraft equipment other aircraft equipment : radar other flight crewa other flight crewb |
Resolutory Action | flight crew : exited adverse environment flight crew : took precautionary avoidance action flight crew : regained aircraft control |
Consequence | other other |
Supplementary | |
Problem Areas | Environmental Factor Flight Crew Human Performance Weather Company Airspace Structure |
Primary Problem | Weather |
Narrative:
About 200 NM west of fst (ft stockton, tx) we were contacted by dispatch and informed of a narrow line of thunderstorms over fst several hundred mi long extending to the north and south. According to the captain (who spoke to dispatch), the line had some breaks in it around fst and we should be able to cross it there. We asked ATC what other aircraft were doing and were told that people were crossing the line in the general area that we were headed with little difficulty. To better see the WX we asked for wrong way FL390 and were denied due to opposite traffic conflicts. The tops were somewhat obscured by other clouds, but we felt as though we could top them seeing as how the opposite direction FL390 traffic was doing it apparently without trouble. The captain instructed the cabin crew to clean up and get seated. A short time later he confirmed they were seated as well as the passenger. The captain made at least 2 PA's to the passenger to inform them of the possibility of turbulence ahead and to keep them informed of our progress. When we got closer to the WX it was looking less likely that we would stay above it in VMC. We asked again for FL390 and, once again, were denied. We naved towards the best place to cross the line and slowed the aircraft to 0.76 mach. We also turned on the engine anti-ice before we entered the WX. When we entered IMC conditions we initially experienced only moderate turbulence and rain. The conditions then degraded to severe turbulence with hail. Airspeed fluctuated +/-20-30 KTS and altitude varied +300 to -700 ft. The aircraft oversped for a short time. Within a short period of time we exited the WX. We lost the WX radar while in the WX. Once clear we noticed unusual wind noise and suspected damage to the nose cone. The captain contacted dispatch and maintenance control to apprise them of the situation. After checking all system on the aircraft it was decided that we should continue to iah. I concurred. The captain checked with the cabin crew and we were told that everyone in the back was okay. We continued to iah at a slower than normal airspeed as a precaution and landed without incident. The postflt inspection revealed a severely damaged nose cone. No other damage was apparent. However, the next day maintenance personnel discovered that the plane had been struck by lightning. As PF, I had some trepidation as to the decision to cross the line in the area we did. I agreed only after considering the input from dispatch, ATC and the captain's experience. I wish now that I would have disagreed more strongly with all the data and trusted myself. It is apparent that everyone sees WX differently. In the future, I will be more willing to return to the departure city or divert rather than give in to poor advice and judgement to meet a schedule.
Original NASA ASRS Text
Title: FLT CREW OF A319 ENCOUNTERED SEVERE TURB AND HAIL WHILE ATTEMPTING TO OVERFLY LINE OF TSTMS NEAR FST AT FL370. ACFT DAMAGED BY HAIL AND LIGHTNING STRIKE.
Narrative: ABOUT 200 NM W OF FST (FT STOCKTON, TX) WE WERE CONTACTED BY DISPATCH AND INFORMED OF A NARROW LINE OF TSTMS OVER FST SEVERAL HUNDRED MI LONG EXTENDING TO THE N AND S. ACCORDING TO THE CAPT (WHO SPOKE TO DISPATCH), THE LINE HAD SOME BREAKS IN IT AROUND FST AND WE SHOULD BE ABLE TO CROSS IT THERE. WE ASKED ATC WHAT OTHER ACFT WERE DOING AND WERE TOLD THAT PEOPLE WERE XING THE LINE IN THE GENERAL AREA THAT WE WERE HEADED WITH LITTLE DIFFICULTY. TO BETTER SEE THE WX WE ASKED FOR WRONG WAY FL390 AND WERE DENIED DUE TO OPPOSITE TFC CONFLICTS. THE TOPS WERE SOMEWHAT OBSCURED BY OTHER CLOUDS, BUT WE FELT AS THOUGH WE COULD TOP THEM SEEING AS HOW THE OPPOSITE DIRECTION FL390 TFC WAS DOING IT APPARENTLY WITHOUT TROUBLE. THE CAPT INSTRUCTED THE CABIN CREW TO CLEAN UP AND GET SEATED. A SHORT TIME LATER HE CONFIRMED THEY WERE SEATED AS WELL AS THE PAX. THE CAPT MADE AT LEAST 2 PA'S TO THE PAX TO INFORM THEM OF THE POSSIBILITY OF TURB AHEAD AND TO KEEP THEM INFORMED OF OUR PROGRESS. WHEN WE GOT CLOSER TO THE WX IT WAS LOOKING LESS LIKELY THAT WE WOULD STAY ABOVE IT IN VMC. WE ASKED AGAIN FOR FL390 AND, ONCE AGAIN, WERE DENIED. WE NAVED TOWARDS THE BEST PLACE TO CROSS THE LINE AND SLOWED THE ACFT TO 0.76 MACH. WE ALSO TURNED ON THE ENG ANTI-ICE BEFORE WE ENTERED THE WX. WHEN WE ENTERED IMC CONDITIONS WE INITIALLY EXPERIENCED ONLY MODERATE TURB AND RAIN. THE CONDITIONS THEN DEGRADED TO SEVERE TURB WITH HAIL. AIRSPD FLUCTUATED +/-20-30 KTS AND ALT VARIED +300 TO -700 FT. THE ACFT OVERSPED FOR A SHORT TIME. WITHIN A SHORT PERIOD OF TIME WE EXITED THE WX. WE LOST THE WX RADAR WHILE IN THE WX. ONCE CLR WE NOTICED UNUSUAL WIND NOISE AND SUSPECTED DAMAGE TO THE NOSE CONE. THE CAPT CONTACTED DISPATCH AND MAINT CTL TO APPRISE THEM OF THE SIT. AFTER CHKING ALL SYS ON THE ACFT IT WAS DECIDED THAT WE SHOULD CONTINUE TO IAH. I CONCURRED. THE CAPT CHKED WITH THE CABIN CREW AND WE WERE TOLD THAT EVERYONE IN THE BACK WAS OKAY. WE CONTINUED TO IAH AT A SLOWER THAN NORMAL AIRSPD AS A PRECAUTION AND LANDED WITHOUT INCIDENT. THE POSTFLT INSPECTION REVEALED A SEVERELY DAMAGED NOSE CONE. NO OTHER DAMAGE WAS APPARENT. HOWEVER, THE NEXT DAY MAINT PERSONNEL DISCOVERED THAT THE PLANE HAD BEEN STRUCK BY LIGHTNING. AS PF, I HAD SOME TREPIDATION AS TO THE DECISION TO CROSS THE LINE IN THE AREA WE DID. I AGREED ONLY AFTER CONSIDERING THE INPUT FROM DISPATCH, ATC AND THE CAPT'S EXPERIENCE. I WISH NOW THAT I WOULD HAVE DISAGREED MORE STRONGLY WITH ALL THE DATA AND TRUSTED MYSELF. IT IS APPARENT THAT EVERYONE SEES WX DIFFERENTLY. IN THE FUTURE, I WILL BE MORE WILLING TO RETURN TO THE DEP CITY OR DIVERT RATHER THAN GIVE IN TO POOR ADVICE AND JUDGEMENT TO MEET A SCHEDULE.
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.