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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Close proximity air carrier-medium large transport unk-small transport, both working day approach control.
| Attributes | |
| ACN | 128189 |
| Time | |
| Date | 198911 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : rid airport : day |
| State Reference | IN |
| Altitude | msl bound lower : 6000 msl bound upper : 6000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : day |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Small Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | climbout : intermediate altitude |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 130 flight time total : 7000 flight time type : 2000 |
| ASRS Report | 128189 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : overshoot conflict : airborne less severe non adherence : clearance other anomaly other |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action other |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 1500 vertical : 200 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation Operational Deviation |
Narrative:
We were assigned 6000 ft. Day approach called traffic at 2 O'clock and 5000 ft. When we picked him up visually, he appeared to be above us, not below. Shortly thereafter, we heard the controller advise the traffic that he had been assigned 5000 ft. The traffic, an small transport, stated that he thought he had been given 8000 ft and was descending back to 5000 ft. At that point he was slightly above us and heading right for us from our 1 O'clock position at 1 1/2-2 mi. He never changed course, and we were forced to make a 45 degree right bank turn and lose approximately 400 ft to avoid the small transport. A follow-up phone call to day approach revealed that controller training was in progress. The small transport pilot had by mistake taken a clearance meant for another aircraft and read back the clearance with his call sign. The controllers, however, both missed the readback and didn't know anything was wrong until the small transport was well above his assigned altitude. Apparently this was a case of either the controller working more than just our frequency, very busy controllers, or a training situation which resulted in a simple but very dangerous mistake!
Original NASA ASRS Text
Title: CLOSE PROX ACR-MLG UNK-SMT, BOTH WORKING DAY APCH CTL.
Narrative: WE WERE ASSIGNED 6000 FT. DAY APCH CALLED TFC AT 2 O'CLOCK AND 5000 FT. WHEN WE PICKED HIM UP VISUALLY, HE APPEARED TO BE ABOVE US, NOT BELOW. SHORTLY THEREAFTER, WE HEARD THE CTLR ADVISE THE TFC THAT HE HAD BEEN ASSIGNED 5000 FT. THE TFC, AN SMT, STATED THAT HE THOUGHT HE HAD BEEN GIVEN 8000 FT AND WAS DSNDING BACK TO 5000 FT. AT THAT POINT HE WAS SLIGHTLY ABOVE US AND HDG RIGHT FOR US FROM OUR 1 O'CLOCK POS AT 1 1/2-2 MI. HE NEVER CHANGED COURSE, AND WE WERE FORCED TO MAKE A 45 DEG R BANK TURN AND LOSE APPROX 400 FT TO AVOID THE SMT. A FOLLOW-UP PHONE CALL TO DAY APCH REVEALED THAT CTLR TRNING WAS IN PROGRESS. THE SMT PLT HAD BY MISTAKE TAKEN A CLRNC MEANT FOR ANOTHER ACFT AND READ BACK THE CLRNC WITH HIS CALL SIGN. THE CTLRS, HOWEVER, BOTH MISSED THE READBACK AND DIDN'T KNOW ANYTHING WAS WRONG UNTIL THE SMT WAS WELL ABOVE HIS ASSIGNED ALT. APPARENTLY THIS WAS A CASE OF EITHER THE CTLR WORKING MORE THAN JUST OUR FREQ, VERY BUSY CTLRS, OR A TRNING SIT WHICH RESULTED IN A SIMPLE BUT VERY DANGEROUS MISTAKE!
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.