 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Flight crew misinterp of ARTCC radar controller's clearance creates a potential conflict with opposite direction traffic.
| Attributes | |
| ACN | 135443 |
| Time | |
| Date | 199001 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : ind |
| State Reference | IN |
| Altitude | msl bound lower : 31000 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other cruise other descent other |
| Route In Use | enroute other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : commercial pilot : flight engineer pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 120 flight time total : 16000 flight time type : 737 |
| ASRS Report | 135443 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance non adherence : required legal separation other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action other |
| Consequence | Other |
| Miss Distance | horizontal : 30000 vertical : 800 |
| Supplementary | |
| Primary Problem | Ambiguous |
| Air Traffic Incident | Pilot Deviation |
Narrative:
While at 35,000' en route to ord, on ZID (radio frequency 134.27), center called and said 'air carrier flight X, start descent to 280 for traffic.' we started down at 1000 FPM and within a minute or so ZID came back with 'air carrier flight X make an immediate turn left to 250 and descend to 310, I told you to slow to 280.' we had read back the center clearance as stated.
Original NASA ASRS Text
Title: FLT CREW MISINTERP OF ARTCC RADAR CTLR'S CLRNC CREATES A POTENTIAL CONFLICT WITH OPPOSITE DIRECTION TRAFFIC.
Narrative: WHILE AT 35,000' ENRTE TO ORD, ON ZID (RADIO FREQ 134.27), CENTER CALLED AND SAID 'ACR FLT X, START DSCNT TO 280 FOR TFC.' WE STARTED DOWN AT 1000 FPM AND WITHIN A MINUTE OR SO ZID CAME BACK WITH 'ACR FLT X MAKE AN IMMEDIATE TURN LEFT TO 250 AND DSND TO 310, I TOLD YOU TO SLOW TO 280.' WE HAD READ BACK THE CENTER CLRNC AS STATED.
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.