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A challenger CL601ER during a high speed reverser test run at 100 KTS on deploying the reversers the aircraft pitched up. In regaining control the aircraft incurred extensive damage.
| Attributes | |
| ACN | 436398 |
| Time | |
| Date | 199905 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : zzz.tower |
| Operator | general aviation : corporate |
| Make Model Name | Challenger CL601 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | ground : takeoff roll |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : corporate |
| Function | maintenance : lead technician observation : observer |
| Qualification | technician : airframe technician : powerplant |
| Experience | maintenance lead technician : 20 |
| ASRS Report | 436398 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | observation : observer oversight : supervisor |
| Qualification | technician : powerplant technician : airframe |
| Experience | maintenance technician : 27 |
| ASRS Report | 436397 |
| Events | |
| Anomaly | aircraft equipment problem : critical excursion : runway non adherence : far non adherence : published procedure other anomaly |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took precautionary avoidance action |
| Consequence | faa : investigated other other other |
| Factors | |
| Maintenance | contributing factor : engineering procedure performance deficiency : testing performance deficiency : inspection performance deficiency : fault isolation |
| Supplementary | |
| Problem Areas | Aircraft Flight Crew Human Performance Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
Pilots reported right thrust reverser tried to stow during landing rollout. Manufacturer's representative was consulted. He advised to try to duplicate the problem and try to detect any abnormal indications. The thrust reversers were operated several times during low speed tax. Clearance was obtained for a high speed taxi test. The pilot selected 20 degrees flaps and trimmed elevators for takeoff. He advanced throttles to takeoff N1 and achieved 100 KIAS. When the thrust reversers were deployed, the nose of the aircraft pitched up. The pilot pushed the yoke forward causing the nose to hit the ground, breaking the nose landing gear. The aircraft rocked from side-to-side breaking the right main gear and skidded off the runway. Wing and fuselage damage was extensive. Personnel on board sustained minor injuries. Callback conversation with reporter revealed the following information: the reporter stated the FAA classified this event as an incident. The reporter said this airplane had no maintenance history on thrust reverser malfunctions. The reporter said the CL601-3R type has no maintenance history of thrust reverser problems. The reporter said the FAA is still investigating but has suspended the pilot for 60 days.
Original NASA ASRS Text
Title: A CHALLENGER CL601ER DURING A HIGH SPD REVERSER TEST RUN AT 100 KTS ON DEPLOYING THE REVERSERS THE ACFT PITCHED UP. IN REGAINING CTL THE ACFT INCURRED EXTENSIVE DAMAGE.
Narrative: PLTS RPTED R THRUST REVERSER TRIED TO STOW DURING LNDG ROLLOUT. MANUFACTURER'S REPRESENTATIVE WAS CONSULTED. HE ADVISED TO TRY TO DUPLICATE THE PROB AND TRY TO DETECT ANY ABNORMAL INDICATIONS. THE THRUST REVERSERS WERE OPERATED SEVERAL TIMES DURING LOW SPD TAX. CLRNC WAS OBTAINED FOR A HIGH SPD TAXI TEST. THE PLT SELECTED 20 DEGS FLAPS AND TRIMMED ELEVATORS FOR TKOF. HE ADVANCED THROTTLES TO TKOF N1 AND ACHIEVED 100 KIAS. WHEN THE THRUST REVERSERS WERE DEPLOYED, THE NOSE OF THE ACFT PITCHED UP. THE PLT PUSHED THE YOKE FORWARD CAUSING THE NOSE TO HIT THE GND, BREAKING THE NOSE LNDG GEAR. THE ACFT ROCKED FROM SIDE-TO-SIDE BREAKING THE R MAIN GEAR AND SKIDDED OFF THE RWY. WING AND FUSELAGE DAMAGE WAS EXTENSIVE. PERSONNEL ON BOARD SUSTAINED MINOR INJURIES. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE FAA CLASSIFIED THIS EVENT AS AN INCIDENT. THE RPTR SAID THIS AIRPLANE HAD NO MAINT HISTORY ON THRUST REVERSER MALFUNCTIONS. THE RPTR SAID THE CL601-3R TYPE HAS NO MAINT HISTORY OF THRUST REVERSER PROBS. THE RPTR SAID THE FAA IS STILL INVESTIGATING BUT HAS SUSPENDED THE PLT FOR 60 DAYS.
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.