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Attributes | |
ACN | 817567 |
Time | |
Date | 200812 |
Local Time Of Day | 1201 To 1800 |
Place | |
Locale Reference | airport : zzz.airport |
State Reference | US |
Altitude | agl single value : 0 |
Environment | |
Flight Conditions | VMC |
Light | Daylight |
Aircraft 1 | |
Operator | common carrier : air taxi |
Make Model Name | Gulfstream 200 [G200] (IAI 1126 Galaxy) |
Operating Under FAR Part | Part 135 |
Flight Phase | landing : roll ground : maintenance |
Flight Plan | IFR |
Person 1 | |
Affiliation | company : air taxi |
Function | flight crew : captain oversight : pic |
Qualification | pilot : atp |
ASRS Report | 817567 |
Events | |
Anomaly | aircraft equipment problem : critical other anomaly |
Independent Detector | other flight crewa |
Resolutory Action | flight crew : took precautionary avoidance action |
Consequence | other |
Supplementary | |
Problem Areas | Aircraft Weather |
Primary Problem | Aircraft |
Narrative:
We prepared for a flight from ZZZ to ZZZ1. At the time of preflight; precipitation in the form of very light snow was in existence. The runway at ZZZ was reported to be contaminated with patchy snow. Our passenger arrived and the precipitation began to increase in intensity to heavy snow. Having deemed it necessary to de-ice; we began to taxi from our company ramp to the de-icing area for the de-ice procedure. While awaiting our turn in the de-ice sequence; the runway had accumulated additional precipitation causing further contamination and putting us beyond our balance field length. We received word that the airport would be closing shortly for snow removal; so we elected to shut down and delay de-icing until operations resumed. While we were waiting the heavy snow changed over to light rain as the temperature climbed to +2C. At approximately XC15 the airport resumed operations. We immediately de-iced and commenced taxi for departure at XC45. Our taxi route took us through mostly wet snow approximately 1 inch in depth with occasional areas of slush and some isolated areas of deeper accumulation probably less than 2 inches in depth. The newly plowed runway was much improved -- mostly wet with occasional thin patches of snow and slush. Per the aircraft cold weather operating procedures; the engine anti-ice was on and flap/slat configuration was delayed until we were in position for takeoff. We were cleared for takeoff which was uneventful. Per the manufacturer's cold recommendation following taxi/takeoff on a contaminated taxiway or runway; we left the landing gear extended for approximately 30 seconds after takeoff. The enroute segment of the flight was uneventful as was the approach segment. At touched down I immediately felt a drag as though the brakes had been applied though they had not. The airplane must have skidded straight ahead for a few hundred feet before the right wheel broke free and began to spin normally; the left main wheels remained locked. Shortly thereafter both left tires blew and the airplane veered sharply to the left coming very near though not beyond the edge of the runway. Using a combination of full right thrust reverser and nosewheel steering we were able to recover to within 5 ft of centerline before coming to a stop. The aircraft was secured; passenger disembarked; and the aircraft was removed from the runway without further incident. To the best of my knowledge we followed the manufacturer's recommendations for operations within and after departing from contaminated surface conditions. In the course of my career; I believe I have operated in similar conditions without incident. The only speculation I can offer is that perhaps carbon fiber brakes possess absorption characteristics in excess of that which we are presently aware or have procedures to address.callback conversation with reporter revealed the following information: post flight analysis of the brakes has not found any defects. The reporter has flown this type aircraft with the carbon brakes through several winter seasons with no problems.
Original NASA ASRS Text
Title: G200 CAPTAIN REPORTS LANDING WITH LOCKED BRAKES AFTER DEPARTURE FROM AIRPORT WITH SLUSHY TAXIWAY AND RUNWAY CONDITIONS.
Narrative: WE PREPARED FOR A FLIGHT FROM ZZZ TO ZZZ1. AT THE TIME OF PREFLIGHT; PRECIPITATION IN THE FORM OF VERY LIGHT SNOW WAS IN EXISTENCE. THE RUNWAY AT ZZZ WAS REPORTED TO BE CONTAMINATED WITH PATCHY SNOW. OUR PAX ARRIVED AND THE PRECIPITATION BEGAN TO INCREASE IN INTENSITY TO HEAVY SNOW. HAVING DEEMED IT NECESSARY TO DE-ICE; WE BEGAN TO TAXI FROM OUR COMPANY RAMP TO THE DE-ICING AREA FOR THE DE-ICE PROCEDURE. WHILE AWAITING OUR TURN IN THE DE-ICE SEQUENCE; THE RUNWAY HAD ACCUMULATED ADDITIONAL PRECIPITATION CAUSING FURTHER CONTAMINATION AND PUTTING US BEYOND OUR BALANCE FIELD LENGTH. WE RECEIVED WORD THAT THE AIRPORT WOULD BE CLOSING SHORTLY FOR SNOW REMOVAL; SO WE ELECTED TO SHUT DOWN AND DELAY DE-ICING UNTIL OPERATIONS RESUMED. WHILE WE WERE WAITING THE HEAVY SNOW CHANGED OVER TO LIGHT RAIN AS THE TEMPERATURE CLIMBED TO +2C. AT APPROX XC15 THE AIRPORT RESUMED OPERATIONS. WE IMMEDIATELY DE-ICED AND COMMENCED TAXI FOR DEPARTURE AT XC45. OUR TAXI ROUTE TOOK US THROUGH MOSTLY WET SNOW APPROX 1 INCH IN DEPTH WITH OCCASIONAL AREAS OF SLUSH AND SOME ISOLATED AREAS OF DEEPER ACCUMULATION PROBABLY LESS THAN 2 INCHES IN DEPTH. THE NEWLY PLOWED RUNWAY WAS MUCH IMPROVED -- MOSTLY WET WITH OCCASIONAL THIN PATCHES OF SNOW AND SLUSH. PER THE AIRCRAFT COLD WEATHER OPERATING PROCEDURES; THE ENGINE ANTI-ICE WAS ON AND FLAP/SLAT CONFIGURATION WAS DELAYED UNTIL WE WERE IN POSITION FOR TAKEOFF. WE WERE CLEARED FOR TAKEOFF WHICH WAS UNEVENTFUL. PER THE MANUFACTURER'S COLD RECOMMENDATION FOLLOWING TAXI/TAKEOFF ON A CONTAMINATED TAXIWAY OR RUNWAY; WE LEFT THE LANDING GEAR EXTENDED FOR APPROX 30 SECONDS AFTER TAKEOFF. THE ENROUTE SEGMENT OF THE FLIGHT WAS UNEVENTFUL AS WAS THE APPROACH SEGMENT. AT TOUCHED DOWN I IMMEDIATELY FELT A DRAG AS THOUGH THE BRAKES HAD BEEN APPLIED THOUGH THEY HAD NOT. THE AIRPLANE MUST HAVE SKIDDED STRAIGHT AHEAD FOR A FEW HUNDRED FEET BEFORE THE RIGHT WHEEL BROKE FREE AND BEGAN TO SPIN NORMALLY; THE LEFT MAIN WHEELS REMAINED LOCKED. SHORTLY THEREAFTER BOTH LEFT TIRES BLEW AND THE AIRPLANE VEERED SHARPLY TO THE LEFT COMING VERY NEAR THOUGH NOT BEYOND THE EDGE OF THE RUNWAY. USING A COMBINATION OF FULL RIGHT THRUST REVERSER AND NOSEWHEEL STEERING WE WERE ABLE TO RECOVER TO WITHIN 5 FT OF CENTERLINE BEFORE COMING TO A STOP. THE AIRCRAFT WAS SECURED; PAX DISEMBARKED; AND THE AIRCRAFT WAS REMOVED FROM THE RUNWAY WITHOUT FURTHER INCIDENT. TO THE BEST OF MY KNOWLEDGE WE FOLLOWED THE MANUFACTURER'S RECOMMENDATIONS FOR OPERATIONS WITHIN AND AFTER DEPARTING FROM CONTAMINATED SURFACE CONDITIONS. IN THE COURSE OF MY CAREER; I BELIEVE I HAVE OPERATED IN SIMILAR CONDITIONS WITHOUT INCIDENT. THE ONLY SPECULATION I CAN OFFER IS THAT PERHAPS CARBON FIBER BRAKES POSSESS ABSORPTION CHARACTERISTICS IN EXCESS OF THAT WHICH WE ARE PRESENTLY AWARE OR HAVE PROCEDURES TO ADDRESS.CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: POST FLIGHT ANALYSIS OF THE BRAKES HAS NOT FOUND ANY DEFECTS. THE REPORTER HAS FLOWN THIS TYPE AIRCRAFT WITH THE CARBON BRAKES THROUGH SEVERAL WINTER SEASONS WITH NO PROBLEMS.
Data retrieved from NASA's ASRS site as of May 2009 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.