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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Large transport aircraft cleared to back taxi on partially closed runway to displaced threshold, flight crew taxied past the poorly marked threshold. Tower advised them and they returned aircraft to threshold for takeoff.
| Attributes | |
| ACN | 372735 |
| Time | |
| Date | 199706 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : mdt |
| State Reference | PA |
| 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 | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground other : taxi |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 240 flight time total : 14000 flight time type : 3000 |
| ASRS Report | 372735 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 200 flight time total : 6500 flight time type : 200 |
| ASRS Report | 372750 |
| Events | |
| Anomaly | non adherence : clearance other anomaly other other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Airport |
| Air Traffic Incident | other |
Narrative:
During taxi out for takeoff on runway 31 at mdt, tower cleared us to back taxi on runway 31 which is partially closed for construction. Airport NOTAM xx states 'when southeast 2500 ft of runway 13/31 is closed, northwest 7000 ft available all operations except 6000 ft available for runway 13 landing to the displaced threshold. Back taxi and 180 degree turn may be required for runway 31 takeoff.' current commercial chart airport diagram page 21-1 does not depict construction area. We back taxied on runway 31 per tower instructions. During 180 degree turn around tower advised that we had taxied beyond runway temporary threshold. The portion of runway 31 that we were on at that time was completely paved and we observed numerous tire marks from previous aircraft that had performed 180 degree turns in this area. We performed 180 degree turn near the cones which we interpreted as the end of available runway with power at idle. We taxied back down runway 31 to the point of actual temporary threshold which is poorly marked. Takeoff from this point was uneventful. Airport NOTAMS, diagrams and actual runway markings do not clearly depict useable portion of runway 31/13.
Original NASA ASRS Text
Title: LGT ACFT CLRED TO BACK TAXI ON PARTIALLY CLOSED RWY TO DISPLACED THRESHOLD, FLC TAXIED PAST THE POORLY MARKED THRESHOLD. TWR ADVISED THEM AND THEY RETURNED ACFT TO THRESHOLD FOR TKOF.
Narrative: DURING TAXI OUT FOR TKOF ON RWY 31 AT MDT, TWR CLRED US TO BACK TAXI ON RWY 31 WHICH IS PARTIALLY CLOSED FOR CONSTRUCTION. ARPT NOTAM XX STATES 'WHEN SE 2500 FT OF RWY 13/31 IS CLOSED, NW 7000 FT AVAILABLE ALL OPS EXCEPT 6000 FT AVAILABLE FOR RWY 13 LNDG TO THE DISPLACED THRESHOLD. BACK TAXI AND 180 DEG TURN MAY BE REQUIRED FOR RWY 31 TKOF.' CURRENT COMMERCIAL CHART ARPT DIAGRAM PAGE 21-1 DOES NOT DEPICT CONSTRUCTION AREA. WE BACK TAXIED ON RWY 31 PER TWR INSTRUCTIONS. DURING 180 DEG TURN AROUND TWR ADVISED THAT WE HAD TAXIED BEYOND RWY TEMPORARY THRESHOLD. THE PORTION OF RWY 31 THAT WE WERE ON AT THAT TIME WAS COMPLETELY PAVED AND WE OBSERVED NUMEROUS TIRE MARKS FROM PREVIOUS ACFT THAT HAD PERFORMED 180 DEG TURNS IN THIS AREA. WE PERFORMED 180 DEG TURN NEAR THE CONES WHICH WE INTERPRETED AS THE END OF AVAILABLE RWY WITH PWR AT IDLE. WE TAXIED BACK DOWN RWY 31 TO THE POINT OF ACTUAL TEMPORARY THRESHOLD WHICH IS POORLY MARKED. TKOF FROM THIS POINT WAS UNEVENTFUL. ARPT NOTAMS, DIAGRAMS AND ACTUAL RWY MARKINGS DO NOT CLRLY DEPICT USEABLE PORTION OF RWY 31/13.
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.