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Small aircraft Y non adherence to ATC instruction flew wrong heading had near midair collision less than standard separation from small aircraft X. System error.
| Attributes | |
| ACN | 266050 |
| Time | |
| Date | 199403 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : bal |
| State Reference | MD |
| Altitude | msl bound lower : 2000 msl bound upper : 2000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : bwi |
| Operator | general aviation : personal |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | other personnel other |
| Qualification | pilot : instrument pilot : cfi |
| Experience | flight time last 90 days : 25 flight time total : 1750 flight time type : 250 |
| ASRS Report | 266050 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Events | |
| Anomaly | conflict : nmac non adherence : published procedure non adherence : required legal separation non adherence : clearance other spatial deviation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 50 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Operational Error Pilot Deviation |
Narrative:
Small aircraft X conducting the third in a series of 4 ILS (practice) approachs to runway 28 at bwi. X had been told to descend to 2000 ft, intercept the localizer and had been cleared for the approach. Immediately after getting established on the localizer, I noticed another ordinal Y at 12 O'clock position, at our altitude, approximately 1/2 - 1 mi away. I took control of the aircraft and initiated a right turn to avoid the other aircraft. I did not see the other aircraft alter course. Approach was calling traffic for us during this maneuver. I informed approach of the other aircraft heading and altitude and we completed the approach. A phone call to approach after landing indicated the other pilot seemed to be having a problem with headings. He was heading approximately 100 degrees when he passed us and had been given a 010 degree heading. This points out the necessity for diligence even in class B airspace.
Original NASA ASRS Text
Title: SMA Y NON ADHERENCE TO ATC INSTRUCTION FLEW WRONG HDG HAD NMAC LTSS FROM SMA X. SYS ERROR.
Narrative: SMA X CONDUCTING THE THIRD IN A SERIES OF 4 ILS (PRACTICE) APCHS TO RWY 28 AT BWI. X HAD BEEN TOLD TO DSND TO 2000 FT, INTERCEPT THE LOC AND HAD BEEN CLRED FOR THE APCH. IMMEDIATELY AFTER GETTING ESTABLISHED ON THE LOC, I NOTICED ANOTHER ORDINAL Y AT 12 O'CLOCK POS, AT OUR ALT, APPROX 1/2 - 1 MI AWAY. I TOOK CTL OF THE ACFT AND INITIATED A R TURN TO AVOID THE OTHER ACFT. I DID NOT SEE THE OTHER ACFT ALTER COURSE. APCH WAS CALLING TFC FOR US DURING THIS MANEUVER. I INFORMED APCH OF THE OTHER ACFT HDG AND ALT AND WE COMPLETED THE APCH. A PHONE CALL TO APCH AFTER LNDG INDICATED THE OTHER PLT SEEMED TO BE HAVING A PROB WITH HDGS. HE WAS HDG APPROX 100 DEGS WHEN HE PASSED US AND HAD BEEN GIVEN A 010 DEG HDG. THIS POINTS OUT THE NECESSITY FOR DILIGENCE EVEN IN CLASS B AIRSPACE.
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.