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A learjet 25B on landing rollout exited the runway to the left and stopped 800 ft before the end of the runway. Caused by antiskid system failure and poor preflight planning.
| Attributes | |
| ACN | 555723 |
| Time | |
| Date | 200208 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| 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 | Learjet 25 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | landing : roll |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air taxi |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 80 flight time total : 2000 flight time type : 12 |
| ASRS Report | 555723 |
| Person 2 | |
| Affiliation | company : air taxi |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : critical excursion : runway non adherence : far non adherence : published procedure other anomaly |
| Independent Detector | aircraft equipment other aircraft equipment : anti-skid warning light other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : reviewed incident with flight crew other other |
| Supplementary | |
| Problem Areas | Chart Or Publication Aircraft Flight Crew Human Performance |
| Primary Problem | Aircraft |
Narrative:
At about XA00 on base to final, I had completed the final checklist. Called out vref on final which was computed by the captain PF. Vref 122 KIAS. Short final, I called out vref +8 KTS (130 KIAS). No action taken by captain. Touchdown with fairly high speed. Spoilers and thrust reversers employed as soon as main gear on ground. At about 80 KIAS, I was ready to call out 80 KTS but the airplane started drifting to the left. I tried to counteract and used right rudder and brake with no effect. No actions taken by captain at this point or comments. No communication. Then we went off the runway at about 800 ft before the end to the left, where we skidded onto the grass and took 1 runway light out. Airplane came to a stop in a sideways position. Captain remained silent. Then he shut down both engines and realized that the antiskid light was on, which indicated a failure of the system. Nobody hurt, no damage to aircraft. FAA showed up and interviewed both me and the captain. Conclusion: weight and balance performed by captain was wrong, used not actual weights of passenger (6) -- he guessed. Conclusion: landing distance was too short for our weight and far part 135. No actions taken yet through FAA personnel. This was my first flight with this captain and first part 135 flight since training in the learjet. Captain stated that all planning including weight and balance, fuel, landing and takeoff data, was computed prior to flight, which turned out to be wrong. He started doing this en route on this flight to my surprise.
Original NASA ASRS Text
Title: A LEARJET 25B ON LNDG ROLLOUT EXITED THE RWY TO THE L AND STOPPED 800 FT BEFORE THE END OF THE RWY. CAUSED BY ANTISKID SYS FAILURE AND POOR PREFLT PLANNING.
Narrative: AT ABOUT XA00 ON BASE TO FINAL, I HAD COMPLETED THE FINAL CHKLIST. CALLED OUT VREF ON FINAL WHICH WAS COMPUTED BY THE CAPT PF. VREF 122 KIAS. SHORT FINAL, I CALLED OUT VREF +8 KTS (130 KIAS). NO ACTION TAKEN BY CAPT. TOUCHDOWN WITH FAIRLY HIGH SPD. SPOILERS AND THRUST REVERSERS EMPLOYED AS SOON AS MAIN GEAR ON GND. AT ABOUT 80 KIAS, I WAS READY TO CALL OUT 80 KTS BUT THE AIRPLANE STARTED DRIFTING TO THE L. I TRIED TO COUNTERACT AND USED R RUDDER AND BRAKE WITH NO EFFECT. NO ACTIONS TAKEN BY CAPT AT THIS POINT OR COMMENTS. NO COM. THEN WE WENT OFF THE RWY AT ABOUT 800 FT BEFORE THE END TO THE L, WHERE WE SKIDDED ONTO THE GRASS AND TOOK 1 RWY LIGHT OUT. AIRPLANE CAME TO A STOP IN A SIDEWAYS POS. CAPT REMAINED SILENT. THEN HE SHUT DOWN BOTH ENGS AND REALIZED THAT THE ANTISKID LIGHT WAS ON, WHICH INDICATED A FAILURE OF THE SYS. NOBODY HURT, NO DAMAGE TO ACFT. FAA SHOWED UP AND INTERVIEWED BOTH ME AND THE CAPT. CONCLUSION: WT AND BAL PERFORMED BY CAPT WAS WRONG, USED NOT ACTUAL WTS OF PAX (6) -- HE GUESSED. CONCLUSION: LNDG DISTANCE WAS TOO SHORT FOR OUR WT AND FAR PART 135. NO ACTIONS TAKEN YET THROUGH FAA PERSONNEL. THIS WAS MY FIRST FLT WITH THIS CAPT AND FIRST PART 135 FLT SINCE TRAINING IN THE LEARJET. CAPT STATED THAT ALL PLANNING INCLUDING WT AND BAL, FUEL, LNDG AND TKOF DATA, WAS COMPUTED PRIOR TO FLT, WHICH TURNED OUT TO BE WRONG. HE STARTED DOING THIS ENRTE ON THIS FLT TO MY SURPRISE.
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.