 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A PA28 flying into san area, is given a command to change his vector heading and is slow to respond. Another aircraft passes close by which causes an near midair collision.
| Attributes | |
| ACN | 412619 |
| Time | |
| Date | 199808 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : mzb |
| State Reference | CA |
| Altitude | msl bound lower : 5000 msl bound upper : 5000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : san |
| Operator | general aviation : personal |
| Make Model Name | PA-28 Cherokee/Archer II/Dakota/Pillan/Warrior |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : instrument pilot : commercial |
| Experience | flight time last 90 days : 20 flight time total : 1000 flight time type : 200 |
| ASRS Report | 412619 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : private |
| Events | |
| Anomaly | conflict : nmac other anomaly other other anomaly other |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Miss Distance | horizontal : 200 vertical : 100 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Flying cherokee 235 on IFR flight in VMC, in contact with socal approach, was proceeding direct mzb at 5000 ft (at approximately location noted above). Was advised by ATC of 'VFR traffic, 12 O'clock, 2 mi, opposite direction, altitude indicates 4800 ft, recommend you turn right to heading 130 degrees.' I replied, 'negative contact, verify you want me to turn left to 130 degrees.' (current heading was approximately 145 degrees.) ATC then replied, 'turn right or left immediately.' I had already initiated a left turn to 130 degrees, then quickly saw the C172 approximately 100 ft below and 200 ft to left pass in the opposite direction. I am concerned that the turn advised to 130 degrees actually put me much closer to the VFR traffic than if I had been advised to maintain present heading of 145 degrees or a right turn to 180 degrees. Was the C172 in contact with socal approach either receiving VFR advisories or was the aircraft an intruder in class B airspace? If the C172 was VFR (whether or not in contact with socal) maintaining VFR cardinal altitude for that course (4500 ft or 6500 ft) rather than 4800-4900 ft would have allowed adequate vertical separation, making the whole incident's occurrence unlikely.
Original NASA ASRS Text
Title: A PA28 FLYING INTO SAN AREA, IS GIVEN A COMMAND TO CHANGE HIS VECTOR HDG AND IS SLOW TO RESPOND. ANOTHER ACFT PASSES CLOSE BY WHICH CAUSES AN NMAC.
Narrative: FLYING CHEROKEE 235 ON IFR FLT IN VMC, IN CONTACT WITH SOCAL APCH, WAS PROCEEDING DIRECT MZB AT 5000 FT (AT APPROX LOCATION NOTED ABOVE). WAS ADVISED BY ATC OF 'VFR TFC, 12 O'CLOCK, 2 MI, OPPOSITE DIRECTION, ALT INDICATES 4800 FT, RECOMMEND YOU TURN R TO HDG 130 DEGS.' I REPLIED, 'NEGATIVE CONTACT, VERIFY YOU WANT ME TO TURN L TO 130 DEGS.' (CURRENT HDG WAS APPROX 145 DEGS.) ATC THEN REPLIED, 'TURN R OR L IMMEDIATELY.' I HAD ALREADY INITIATED A L TURN TO 130 DEGS, THEN QUICKLY SAW THE C172 APPROX 100 FT BELOW AND 200 FT TO L PASS IN THE OPPOSITE DIRECTION. I AM CONCERNED THAT THE TURN ADVISED TO 130 DEGS ACTUALLY PUT ME MUCH CLOSER TO THE VFR TFC THAN IF I HAD BEEN ADVISED TO MAINTAIN PRESENT HDG OF 145 DEGS OR A R TURN TO 180 DEGS. WAS THE C172 IN CONTACT WITH SOCAL APCH EITHER RECEIVING VFR ADVISORIES OR WAS THE ACFT AN INTRUDER IN CLASS B AIRSPACE? IF THE C172 WAS VFR (WHETHER OR NOT IN CONTACT WITH SOCAL) MAINTAINING VFR CARDINAL ALT FOR THAT COURSE (4500 FT OR 6500 FT) RATHER THAN 4800-4900 FT WOULD HAVE ALLOWED ADEQUATE VERT SEPARATION, MAKING THE WHOLE INCIDENT'S OCCURRENCE UNLIKELY.
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.