 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Loss of separation when SF34 goes through the localizer and conflicts with other SF34 on approach to a parallel runway. Reporter claims no approach clearance was issued.
| Attributes | |
| ACN | 389961 |
| Time | |
| Date | 199801 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : dfw |
| State Reference | TX |
| Altitude | msl bound lower : 4000 msl bound upper : 4000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : dfw tower : anc |
| Operator | common carrier : air carrier |
| Make Model Name | SF 340B |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | cruise other descent : approach |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | SF 340B |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | cruise other descent : approach |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 12 flight time total : 9000 flight time type : 5500 |
| ASRS Report | 389961 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action other |
| Consequence | Other |
| Miss Distance | horizontal : 3000 vertical : 200 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft #1 was being vectored by approach and was told to expect ILS runway 17L at dfw. Aircraft #1 did not receive clearance to intercept the localizer runway 17L or clearance for the approach, ie, ILS runway 17L. No clearance for the approach was acknowledged by aircraft #1. Consequently, aircraft #1 flew through the final course inbound for ILS runway 17L at dfw. Aircraft #1 soon afterwards (10 seconds) had a conflict with aircraft #2. Aircraft #1 was heading 250 degrees and aircraft #2 was heading approximately 160 degrees to intercept on another approach ILS, runway unknown. Aircraft #1 received an RA and descended 300 ft to 3700 ft MSL and turned right to 360 degrees. The heading of 360 degrees was assigned by approach, the descent was initiated by aircraft #1. Aircraft #2 remained on course and at 4100 ft MSL as displayed on aircraft #1 TCASII display. Approach control stated that aircraft #1 had previously been cleared to intercept the localizer runway 17L at 4000 ft and was cleared for ILS runway 17L at dfw. Neither crew man of aircraft #1 heard or acknowledged such a clearance. The TCASII proved vital in avoiding a midair.
Original NASA ASRS Text
Title: LOSS OF SEPARATION WHEN SF34 GOES THROUGH THE LOC AND CONFLICTS WITH OTHER SF34 ON APCH TO A PARALLEL RWY. RPTR CLAIMS NO APCH CLRNC WAS ISSUED.
Narrative: ACFT #1 WAS BEING VECTORED BY APCH AND WAS TOLD TO EXPECT ILS RWY 17L AT DFW. ACFT #1 DID NOT RECEIVE CLRNC TO INTERCEPT THE LOC RWY 17L OR CLRNC FOR THE APCH, IE, ILS RWY 17L. NO CLRNC FOR THE APCH WAS ACKNOWLEDGED BY ACFT #1. CONSEQUENTLY, ACFT #1 FLEW THROUGH THE FINAL COURSE INBOUND FOR ILS RWY 17L AT DFW. ACFT #1 SOON AFTERWARDS (10 SECONDS) HAD A CONFLICT WITH ACFT #2. ACFT #1 WAS HDG 250 DEGS AND ACFT #2 WAS HDG APPROX 160 DEGS TO INTERCEPT ON ANOTHER APCH ILS, RWY UNKNOWN. ACFT #1 RECEIVED AN RA AND DSNDED 300 FT TO 3700 FT MSL AND TURNED R TO 360 DEGS. THE HDG OF 360 DEGS WAS ASSIGNED BY APCH, THE DSCNT WAS INITIATED BY ACFT #1. ACFT #2 REMAINED ON COURSE AND AT 4100 FT MSL AS DISPLAYED ON ACFT #1 TCASII DISPLAY. APCH CTL STATED THAT ACFT #1 HAD PREVIOUSLY BEEN CLRED TO INTERCEPT THE LOC RWY 17L AT 4000 FT AND WAS CLRED FOR ILS RWY 17L AT DFW. NEITHER CREW MAN OF ACFT #1 HEARD OR ACKNOWLEDGED SUCH A CLRNC. THE TCASII PROVED VITAL IN AVOIDING A MIDAIR.
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.