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Air carrier medium large transport altitude deviation overshot during descent causing less than standard separation with company aircraft in climb.
| Attributes | |
| ACN | 138486 |
| Time | |
| Date | 199003 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : lny |
| State Reference | HI |
| Altitude | msl bound lower : 20000 msl bound upper : 22000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zhn |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other descent other |
| Route In Use | enroute : direct |
| 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 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 180 flight time total : 12000 flight time type : 4800 |
| ASRS Report | 138486 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 255 flight time total : 3000 |
| ASRS Report | 138659 |
| 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 |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 10500 vertical : 750 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation Operational Error |
Narrative:
First officer copied clearance to descend from FL240 to FL200, and then initiated descent. I was off #1 VHF copying ATIS, returned to center frequency to hear center calling 'traffic alert, turn left heading 230 degrees.' we looked up to see an airliner pass our 3 O'clock, approximately 2 mi and slightly higher. Called center once on the ground and initiated inquiry. Suspect we were cleared to FL220, read back FL20 and it was not caught. Classic readback/hearback problem. Lesson: don't leave ATC frequencys to 1 crew member.
Original NASA ASRS Text
Title: ACR MLG ALT DEVIATION OVERSHOT DURING DESCENT CAUSING LESS THAN STANDARD SEPARATION WITH COMPANY ACFT IN CLIMB.
Narrative: F/O COPIED CLRNC TO DSND FROM FL240 TO FL200, AND THEN INITIATED DSCNT. I WAS OFF #1 VHF COPYING ATIS, RETURNED TO CENTER FREQ TO HEAR CENTER CALLING 'TFC ALERT, TURN LEFT HDG 230 DEGS.' WE LOOKED UP TO SEE AN AIRLINER PASS OUR 3 O'CLOCK, APPROX 2 MI AND SLIGHTLY HIGHER. CALLED CENTER ONCE ON THE GND AND INITIATED INQUIRY. SUSPECT WE WERE CLRED TO FL220, READ BACK FL20 AND IT WAS NOT CAUGHT. CLASSIC READBACK/HEARBACK PROB. LESSON: DON'T LEAVE ATC FREQS TO 1 CREW MEMBER.
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.