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Inbound large transport overshot altitude and came into close proximity with outbound medium large transport.
| Attributes | |
| ACN | 85399 |
| Time | |
| Date | 198804 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : sma airport : lax |
| State Reference | CA |
| Altitude | msl bound lower : 9000 msl bound upper : 9200 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : lax |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent other |
| Route In Use | arrival : profile descent |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude cruise other |
| Route In Use | departure sid : sid |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller military : 12 controller radar : 7 |
| ASRS Report | 85399 |
| Person 2 | |
| Function | controller : approach |
| Qualification | controller : developmental |
| Events | |
| Anomaly | altitude deviation : overshoot conflict : airborne less severe non adherence : clearance non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action other |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 6000 vertical : 200 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Large transport X inbound runway 24/25 profile over fillmore busted his profile altitude clearance of 10000' and passed dangerously close to a northbound departure (medium large transport Y) climbing to 9000'. Standard sep was definitely lost. Altitude sep deteriorated to as little as 300' and latitude sep 1-2 mi. The departure controller was the first to catch the deviation and corrective action by both the arrival controller and departure controller saved what could possibly have been a catastrophic situation. Callback conversation with reporter revealed the following: this incident was processed as a pilot deviation. The large transport flight crew thought they were cleared to 7000'. They were actually cleared to 10000'. The outbnd medium large transport was cleared to and was level at 9000' the inbound large transport went through his assigned altitude to 9200. C/a sounded and both the departure controller and approach controller gave traffic information and evasive instructions. The inbound large transport said he had the medium large transport in sight. Closest point of proximity was 1 mi and 200'. Controller's experience level was determined during conversation. Approach controller training was in progress with reporter acting as instrument.
Original NASA ASRS Text
Title: INBOUND LGT OVERSHOT ALT AND CAME INTO CLOSE PROX WITH OUTBOUND MLG.
Narrative: LGT X INBOUND RWY 24/25 PROFILE OVER FILLMORE BUSTED HIS PROFILE ALT CLRNC OF 10000' AND PASSED DANGEROUSLY CLOSE TO A NBOUND DEP (MLG Y) CLBING TO 9000'. STANDARD SEP WAS DEFINITELY LOST. ALT SEP DETERIORATED TO AS LITTLE AS 300' AND LAT SEP 1-2 MI. THE DEP CTLR WAS THE FIRST TO CATCH THE DEVIATION AND CORRECTIVE ACTION BY BOTH THE ARR CTLR AND DEP CTLR SAVED WHAT COULD POSSIBLY HAVE BEEN A CATASTROPHIC SITUATION. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: THIS INCIDENT WAS PROCESSED AS A PLTDEV. THE LGT FLT CREW THOUGHT THEY WERE CLRED TO 7000'. THEY WERE ACTUALLY CLRED TO 10000'. THE OUTBND MLG WAS CLRED TO AND WAS LEVEL AT 9000' THE INBOUND LGT WENT THROUGH HIS ASSIGNED ALT TO 9200. C/A SOUNDED AND BOTH THE DEP CTLR AND APCH CTLR GAVE TFC INFO AND EVASIVE INSTRUCTIONS. THE INBOUND LGT SAID HE HAD THE MLG IN SIGHT. CLOSEST POINT OF PROX WAS 1 MI AND 200'. CTLR'S EXPERIENCE LEVEL WAS DETERMINED DURING CONVERSATION. APCH CTLR TRNING WAS IN PROGRESS WITH RPTR ACTING AS INSTR.
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.