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ATC local controller failed to inform flight crew reason for cancellation of takeoff clearance. Operational deviation.
| Attributes | |
| ACN | 131384 |
| Time | |
| Date | 198912 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : cle |
| State Reference | OH |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : pwa |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : takeoff |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 8000 flight time type : 1300 |
| ASRS Report | 131384 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : non radar |
| Events | |
| Anomaly | non adherence : published procedure |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Deviation |
Narrative:
Air carrier X cle-stl was cleared for takeoff on runway 5L, since longer runway 5R in process of being plowed. WX at time: snowing, obscured ceiling, 1/2-3/4 mi visibility, approximately 3500' RVR. Report just given that landing runway 28 braking action was poor to nil. Runway 5L 7096' was covered with packed snow and ice. First officer in left seat for purposed of captain upgrade training making takeoff. At approximately 120 KTS (V1 135, vr 140), tower said, 'air carrier X cancel takeoff clearance.' tower was told that air carrier was already committed. At about rotation an aircraft was seen on left side, probably holding short of runway on a taxiway. At this point, however, it was difficult to ascertain its exact position and if it was indeed holding short. Takeoff continued normally. No reason given for 'cancel takeoff;' it is suspected that this was due to cle center losing slot at that time. It is felt that the tower exercised extremely poor judgement by: 1) failing to ascertain air carrier X position first, 2) giving ambiguous clearance, and 3) not providing purpose of clearance.
Original NASA ASRS Text
Title: ATC LCL CTLR FAILED TO INFORM FLT CREW REASON FOR CANCELLATION OF TKOF CLRNC. OPERATIONAL DEVIATION.
Narrative: ACR X CLE-STL WAS CLRED FOR TKOF ON RWY 5L, SINCE LONGER RWY 5R IN PROCESS OF BEING PLOWED. WX AT TIME: SNOWING, OBSCURED CEILING, 1/2-3/4 MI VISIBILITY, APPROX 3500' RVR. RPT JUST GIVEN THAT LNDG RWY 28 BRAKING ACTION WAS POOR TO NIL. RWY 5L 7096' WAS COVERED WITH PACKED SNOW AND ICE. F/O IN LEFT SEAT FOR PURPOSED OF CAPT UPGRADE TRNING MAKING TKOF. AT APPROX 120 KTS (V1 135, VR 140), TWR SAID, 'ACR X CANCEL TKOF CLRNC.' TWR WAS TOLD THAT ACR WAS ALREADY COMMITTED. AT ABOUT ROTATION AN ACFT WAS SEEN ON LEFT SIDE, PROBABLY HOLDING SHORT OF RWY ON A TXWY. AT THIS POINT, HOWEVER, IT WAS DIFFICULT TO ASCERTAIN ITS EXACT POS AND IF IT WAS INDEED HOLDING SHORT. TKOF CONTINUED NORMALLY. NO REASON GIVEN FOR 'CANCEL TKOF;' IT IS SUSPECTED THAT THIS WAS DUE TO CLE CENTER LOSING SLOT AT THAT TIME. IT IS FELT THAT THE TWR EXERCISED EXTREMELY POOR JUDGEMENT BY: 1) FAILING TO ASCERTAIN ACR X POS FIRST, 2) GIVING AMBIGUOUS CLRNC, AND 3) NOT PROVIDING PURPOSE OF CLRNC.
Data retrieved from NASA's ASRS site as of August 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.