Narrative:

I was sitting in the back of the aircraft while our training/check airman captain was in left seat of learjet with a new copilot in right seat. They were checking out the new guy -- VFR landing after a practice ILS. The copilot was flying -- on final the aircraft began to dutch roll. It became severe and by the time the captain recovered we had struck both tip tanks on the runway. Aircraft was slightly damaged, so the captain made the decision it was flyable and we took the aircraft home to yip to change aircraft and crew. On this leg I acted as copilot in the right seat, not realizing the severity of our actions by flying the aircraft under part 135 after the incident. Supplemental information from acn 309225: we were set up for normal landing slightly to the right of centerline and reference plus 10. First officer initiated a flare at approximately 6 ft AGL, then immediately said 'I have the airplane' but I had to then say 'let go of the controls' before I was able to initiate right roll corrective action. We touched down in a left wing low attitude then rolled to a right wing low attitude at which time I rolled the wings level and initiated a go around. I then brought the aircraft around to a normal landing. After exiting the aircraft, we discovered that we had scraped both tip tanks. I called dispatch and advised them of the incident. Dispatch asked if I was able to bring the aircraft back to yip and I felt the damage was not severe and the aircraft was structurally sound, so I agreed to reposition the aircraft home. The freight arrived and we departed ptk for yip on a tower en route. The remainder of the flight was uneventful. I have been flying lears for about 10 yrs now and have had occasions in the past where a copilot has started to drop the wing in the flare. Each time I have been able to correct this error. In this case, however, I was unable to correct this wing low condition in sufficient time to avoid this incident. Callback conversation with reporter acn 309225 revealed the following information: the reporter is an instructor pilot for a far part 135 freight air carrier. His trnee was a low time pilot with no previous jet experience. The aircraft rolled 30 degrees or more side-to-side with the main gear on the runway, scraping the bottom of the tanks and bending up the tiptank winglets. The tank paint was touched up and the winglets were replaced. The trnee froze on the controls making it difficult for the reporter to take control of the aircraft. The FAA awarded the reporter a letter in his file for 2 yrs and he had to take his recurrent simulator training early. The issue was flying the aircraft far part 135 with freight aboard without an inspection.

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Original NASA ASRS Text

Title: LEARJET ACFT DAMAGED WHILE TRAINING IN PROGRESS. ACFT FLOWN BACK TO HOME BASE, DAMAGED, IN A PART 135 OP.

Narrative: I WAS SITTING IN THE BACK OF THE ACFT WHILE OUR TRAINING/CHK AIRMAN CAPT WAS IN L SEAT OF LEARJET WITH A NEW COPLT IN R SEAT. THEY WERE CHKING OUT THE NEW GUY -- VFR LNDG AFTER A PRACTICE ILS. THE COPLT WAS FLYING -- ON FINAL THE ACFT BEGAN TO DUTCH ROLL. IT BECAME SEVERE AND BY THE TIME THE CAPT RECOVERED WE HAD STRUCK BOTH TIP TANKS ON THE RWY. ACFT WAS SLIGHTLY DAMAGED, SO THE CAPT MADE THE DECISION IT WAS FLYABLE AND WE TOOK THE ACFT HOME TO YIP TO CHANGE ACFT AND CREW. ON THIS LEG I ACTED AS COPLT IN THE R SEAT, NOT REALIZING THE SEVERITY OF OUR ACTIONS BY FLYING THE ACFT UNDER PART 135 AFTER THE INCIDENT. SUPPLEMENTAL INFO FROM ACN 309225: WE WERE SET UP FOR NORMAL LNDG SLIGHTLY TO THE R OF CTRLINE AND REF PLUS 10. FO INITIATED A FLARE AT APPROX 6 FT AGL, THEN IMMEDIATELY SAID 'I HAVE THE AIRPLANE' BUT I HAD TO THEN SAY 'LET GO OF THE CTLS' BEFORE I WAS ABLE TO INITIATE R ROLL CORRECTIVE ACTION. WE TOUCHED DOWN IN A L WING LOW ATTITUDE THEN ROLLED TO A R WING LOW ATTITUDE AT WHICH TIME I ROLLED THE WINGS LEVEL AND INITIATED A GAR. I THEN BROUGHT THE ACFT AROUND TO A NORMAL LNDG. AFTER EXITING THE ACFT, WE DISCOVERED THAT WE HAD SCRAPED BOTH TIP TANKS. I CALLED DISPATCH AND ADVISED THEM OF THE INCIDENT. DISPATCH ASKED IF I WAS ABLE TO BRING THE ACFT BACK TO YIP AND I FELT THE DAMAGE WAS NOT SEVERE AND THE ACFT WAS STRUCTURALLY SOUND, SO I AGREED TO REPOSITION THE ACFT HOME. THE FREIGHT ARRIVED AND WE DEPARTED PTK FOR YIP ON A TWR ENRTE. THE REMAINDER OF THE FLT WAS UNEVENTFUL. I HAVE BEEN FLYING LEARS FOR ABOUT 10 YRS NOW AND HAVE HAD OCCASIONS IN THE PAST WHERE A COPLT HAS STARTED TO DROP THE WING IN THE FLARE. EACH TIME I HAVE BEEN ABLE TO CORRECT THIS ERROR. IN THIS CASE, HOWEVER, I WAS UNABLE TO CORRECT THIS WING LOW CONDITION IN SUFFICIENT TIME TO AVOID THIS INCIDENT. CALLBACK CONVERSATION WITH RPTR ACN 309225 REVEALED THE FOLLOWING INFO: THE RPTR IS AN INSTRUCTOR PLT FOR A FAR PART 135 FREIGHT ACR. HIS TRNEE WAS A LOW TIME PLT WITH NO PREVIOUS JET EXPERIENCE. THE ACFT ROLLED 30 DEGS OR MORE SIDE-TO-SIDE WITH THE MAIN GEAR ON THE RWY, SCRAPING THE BOTTOM OF THE TANKS AND BENDING UP THE TIPTANK WINGLETS. THE TANK PAINT WAS TOUCHED UP AND THE WINGLETS WERE REPLACED. THE TRNEE FROZE ON THE CTLS MAKING IT DIFFICULT FOR THE RPTR TO TAKE CTL OF THE ACFT. THE FAA AWARDED THE RPTR A LETTER IN HIS FILE FOR 2 YRS AND HE HAD TO TAKE HIS RECURRENT SIMULATOR TRAINING EARLY. THE ISSUE WAS FLYING THE ACFT FAR PART 135 WITH FREIGHT ABOARD WITHOUT AN INSPECTION.

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.