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Air carrier X declared an emergency with flap problem. Asked for and received descent to occupied altitude and had less than standard separation from small aircraft Y. System error.
| Attributes | |
| ACN | 177112 |
| Time | |
| Date | 199104 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : ord |
| State Reference | IL |
| Altitude | msl bound lower : 4000 msl bound upper : 5000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : ord |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Retractable Gear |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller non radar : 8 controller radar : 3 |
| ASRS Report | 177112 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other other : unspecified atc |
| Resolutory Action | flight crew : declared emergency none taken : anomaly accepted |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 9000 vertical : 600 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier X an emergency was no approach to ILS 9R. At 5000' air carrier X requested lower altitude immediately on initial contact. I cleared air carrier X for ILS 9R at 4000'. I complied with air carrier X's request due to my knowledge he was an emergency and not being fully aware of his statue. Small aircraft Y off of dupage airport was climbing to 4000' and became a confliction with air carrier X. Traffic was issued to both aircraft. The small aircraft Y reported air carrier X in sight, but not before standard sep was lost. Callback conversation with reporter revealed the following: reporter stated his experience as 3 yrs radar and 8 yrs non radar. Miss distance 9000' horizontal, 600' vertical. The reporter stated he applied visibility sep at 2 3/4 mi, air carrier X emergency was a flap problem.
Original NASA ASRS Text
Title: ACR X DECLARED AN EMERGENCY WITH FLAP PROBLEM. ASKED FOR AND RECEIVED DESCENT TO OCCUPIED ALT AND HAD LESS THAN STANDARD SEPARATION FROM SMA Y. SYSTEM ERROR.
Narrative: ACR X AN EMER WAS NO APCH TO ILS 9R. AT 5000' ACR X REQUESTED LOWER ALT IMMEDIATELY ON INITIAL CONTACT. I CLRED ACR X FOR ILS 9R AT 4000'. I COMPLIED WITH ACR X'S REQUEST DUE TO MY KNOWLEDGE HE WAS AN EMER AND NOT BEING FULLY AWARE OF HIS STATUE. SMA Y OFF OF DUPAGE ARPT WAS CLBING TO 4000' AND BECAME A CONFLICTION WITH ACR X. TFC WAS ISSUED TO BOTH ACFT. THE SMA Y RPTED ACR X IN SIGHT, BUT NOT BEFORE STANDARD SEP WAS LOST. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: RPTR STATED HIS EXPERIENCE AS 3 YRS RADAR AND 8 YRS NON RADAR. MISS DISTANCE 9000' HORIZ, 600' VERT. THE RPTR STATED HE APPLIED VIS SEP AT 2 3/4 MI, ACR X EMER WAS A FLAP PROB.
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.