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Air carrier large transport slides off end of runway as it encounters ice covered surface under the snow.
| Attributes | |
| ACN | 134402 |
| Time | |
| Date | 199001 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : den |
| State Reference | CO |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : ord |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | ground other : taxi landing other |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : flight engineer pilot : cfi |
| Experience | flight time last 90 days : 200 flight time total : 18000 flight time type : 5000 |
| ASRS Report | 134402 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 130 flight time total : 11000 flight time type : 5500 |
| ASRS Report | 134531 |
| Events | |
| Anomaly | conflict : ground less severe non adherence : clearance other anomaly other anomaly other other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : unable |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Primary Problem | Ambiguous |
| Air Traffic Incident | Pilot Deviation other other |
| Situations | |
| ATC Facility | other physical facility procedure or policy : unspecified |
| Airport | procedure or policy : unspecified |
Narrative:
ILS approach was to runway 35L at den. WX was 3500' RVR, moderate snow (several inches accumulation). Wind 350 degrees, 7 KTS. Braking action 35L reported good. Aircraft weight for approach, 142000#. Approach speed was right on target (reference + 5). Captain called runway in sight at about 300' AGL. T/D was on centerline very near 1500' mark. Thrust reversers immediately deployed with about 85% N1 power. 80 KIAS reached no later than midfield. Captain assumed control and removed some of the reverse thrust. Supplemental information from acn 134528: the first officer had made the approach and landing, and at 80 KTS the captain took over control of the aircraft. The aircraft continued to decelerate as the captain stowed the thrust reversers. Continued information from acn 134402: at tower's request we were taxiing to end of runway. Approaching the end I thought we would be too fast to make the turn. Captain was having no response to braking, but neither second officer nor I had any knowledge of this. About 2 seconds before the end of the runway, F/east and I simultaneously said 'more reverse!' by this time it was too late for any physical assistance from me on the reversers. Thrust was not increased, and we went into the overrun. Transition to overrun was smooth; passenger thought we were at gate. Captain asked that they remain seated, I called tower. At this point the last 1500' of 35L was almost solid ice; braking action at end was now reported as nil. Supplemental information from acn 134531: after company maintenance and airport operations inspection, it was agreed with flight crew approval that a power back onto the runway would be attempted. This was done successfully. Normal taxi back to gate.
Original NASA ASRS Text
Title: ACR LGT SLIDES OFF END OF RWY AS IT ENCOUNTERS ICE COVERED SURFACE UNDER THE SNOW.
Narrative: ILS APCH WAS TO RWY 35L AT DEN. WX WAS 3500' RVR, MODERATE SNOW (SEVERAL INCHES ACCUMULATION). WIND 350 DEGS, 7 KTS. BRAKING ACTION 35L RPTED GOOD. ACFT WT FOR APCH, 142000#. APCH SPD WAS RIGHT ON TARGET (REF + 5). CAPT CALLED RWY IN SIGHT AT ABOUT 300' AGL. T/D WAS ON CENTERLINE VERY NEAR 1500' MARK. THRUST REVERSERS IMMEDIATELY DEPLOYED WITH ABOUT 85% N1 PWR. 80 KIAS REACHED NO LATER THAN MIDFIELD. CAPT ASSUMED CONTROL AND REMOVED SOME OF THE REVERSE THRUST. SUPPLEMENTAL INFO FROM ACN 134528: THE F/O HAD MADE THE APCH AND LNDG, AND AT 80 KTS THE CAPT TOOK OVER CONTROL OF THE ACFT. THE ACFT CONTINUED TO DECELERATE AS THE CAPT STOWED THE THRUST REVERSERS. CONTINUED INFORMATION FROM ACN 134402: AT TWR'S REQUEST WE WERE TAXIING TO END OF RWY. APCHING THE END I THOUGHT WE WOULD BE TOO FAST TO MAKE THE TURN. CAPT WAS HAVING NO RESPONSE TO BRAKING, BUT NEITHER S/O NOR I HAD ANY KNOWLEDGE OF THIS. ABOUT 2 SECONDS BEFORE THE END OF THE RWY, F/E AND I SIMULTANEOUSLY SAID 'MORE REVERSE!' BY THIS TIME IT WAS TOO LATE FOR ANY PHYSICAL ASSISTANCE FROM ME ON THE REVERSERS. THRUST WAS NOT INCREASED, AND WE WENT INTO THE OVERRUN. TRANSITION TO OVERRUN WAS SMOOTH; PAX THOUGHT WE WERE AT GATE. CAPT ASKED THAT THEY REMAIN SEATED, I CALLED TWR. AT THIS POINT THE LAST 1500' OF 35L WAS ALMOST SOLID ICE; BRAKING ACTION AT END WAS NOW RPTED AS NIL. SUPPLEMENTAL INFO FROM ACN 134531: AFTER COMPANY MAINT AND ARPT OPS INSPECTION, IT WAS AGREED WITH FLT CREW APPROVAL THAT A PWR BACK ONTO THE RWY WOULD BE ATTEMPTED. THIS WAS DONE SUCCESSFULLY. NORMAL TAXI BACK TO GATE.
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.