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An air carrier large transport crew reports that they had a 10 KT difference between their airspeed indicators on final approach.
| Attributes | |
| ACN | 247475 |
| Time | |
| Date | 199307 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : clt |
| State Reference | NC |
| Altitude | agl bound lower : 0 agl bound upper : 30 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : clt |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach landing : go around |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer observation : company check pilot oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 50 flight time total : 25000 flight time type : 800 |
| ASRS Report | 247475 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain instruction : trainee |
| Qualification | pilot : flight engineer pilot : instrument pilot : commercial pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 80 flight time total : 13000 flight time type : 21 |
| ASRS Report | 247474 |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
As instructor pilot, I was conducting an initial operating experience. On this approach, we were cleared visually to runway 23. At 500 ft called speed as being 5 KTS slow. Aircraft accelerated slightly at 200 ft. Called 7 KTS slow. Captain said looked normal. Just after 50 ft, right airspeed indicator showed 10 KTS slow. I called for go around, thrust applied, wheels touched, go around continued and went around to land on south runway. Left airspeed indicated normal, but right was still slow on next approach. Aircraft discrepancy noted in log.
Original NASA ASRS Text
Title: AN ACR LGT CREW RPTS THAT THEY HAD A 10 KT DIFFERENCE BTWN THEIR AIRSPD INDICATORS ON FINAL APCH.
Narrative: AS INSTRUCTOR PLT, I WAS CONDUCTING AN INITIAL OPERATING EXPERIENCE. ON THIS APCH, WE WERE CLRED VISUALLY TO RWY 23. AT 500 FT CALLED SPD AS BEING 5 KTS SLOW. ACFT ACCELERATED SLIGHTLY AT 200 FT. CALLED 7 KTS SLOW. CAPT SAID LOOKED NORMAL. JUST AFTER 50 FT, R AIRSPD INDICATOR SHOWED 10 KTS SLOW. I CALLED FOR GAR, THRUST APPLIED, WHEELS TOUCHED, GAR CONTINUED AND WENT AROUND TO LAND ON S RWY. L AIRSPD INDICATED NORMAL, BUT R WAS STILL SLOW ON NEXT APCH. ACFT DISCREPANCY NOTED IN LOG.
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.