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Captain of an large transport air carrier aircraft hit the tailskid during takeoff due an early speed rotation caused by incorrect aircraft weight and balance data.
| Attributes | |
| ACN | 247084 |
| Time | |
| Date | 199307 |
| 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 | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : takeoff |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 272 flight time total : 14000 flight time type : 10500 |
| ASRS Report | 247084 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 230 flight time total : 16000 flight time type : 9000 |
| ASRS Report | 247675 |
| Events | |
| Anomaly | aircraft equipment problem : less severe conflict : ground less severe other anomaly other |
| Independent Detector | other other : unspecified |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
After normal preflight, used den runway 35R for a 5 degree flaps takeoff. On takeoff roll, airspeed hesitated at 100 KTS and then continued to accelerate. Winds were reported light and variable prior to takeoff. Used normal rotation rate and noticed liftoff was sluggish. Raised gear and noticed tailskid light remained on. Executed abnormal procedure for tailskid light and flew to destination. Upon investigation, found takeoff bugs were set for 144000 pounds takeoff vice 158000 pounds required. (Actual 156800 pounds.) takeoff cards were dropped by so prior to handing to first officer and discrepancy was not caught prior to takeoff. Skid pad was polished and honeycomb slightly crushed. Low bug speeds (9 KTS) and possible tailwind contributed to mushy takeoff performance. Wind reported calm awy 35L, 090/08 for runway 35R. Crew must pay critical attention to takeoff weights at high density altitudes.
Original NASA ASRS Text
Title: CAPT OF AN LGT ACR ACFT HIT THE TAILSKID DURING TKOF DUE AN EARLY SPD ROTATION CAUSED BY INCORRECT ACFT WT AND BAL DATA.
Narrative: AFTER NORMAL PREFLT, USED DEN RWY 35R FOR A 5 DEG FLAPS TKOF. ON TKOF ROLL, AIRSPD HESITATED AT 100 KTS AND THEN CONTINUED TO ACCELERATE. WINDS WERE RPTED LIGHT AND VARIABLE PRIOR TO TKOF. USED NORMAL ROTATION RATE AND NOTICED LIFTOFF WAS SLUGGISH. RAISED GEAR AND NOTICED TAILSKID LIGHT REMAINED ON. EXECUTED ABNORMAL PROC FOR TAILSKID LIGHT AND FLEW TO DEST. UPON INVESTIGATION, FOUND TKOF BUGS WERE SET FOR 144000 LBS TKOF VICE 158000 LBS REQUIRED. (ACTUAL 156800 LBS.) TKOF CARDS WERE DROPPED BY SO PRIOR TO HANDING TO FO AND DISCREPANCY WAS NOT CAUGHT PRIOR TO TKOF. SKID PAD WAS POLISHED AND HONEYCOMB SLIGHTLY CRUSHED. LOW BUG SPDS (9 KTS) AND POSSIBLE TAILWIND CONTRIBUTED TO MUSHY TKOF PERFORMANCE. WIND RPTED CALM AWY 35L, 090/08 FOR RWY 35R. CREW MUST PAY CRITICAL ATTN TO TKOF WTS AT HIGH DENSITY ALTS.
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.