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Captain of an light transport overshot descent altitude resulting in loss of standard separation with other traffic.
| Attributes | |
| ACN | 328373 |
| Time | |
| Date | 199602 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : cvg |
| State Reference | OH |
| Altitude | msl bound lower : 7700 msl bound upper : 8000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : lex |
| Operator | common carrier : air carrier |
| Make Model Name | Beech 1900 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | descent other |
| Route In Use | enroute airway : cvg |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | other : unknown |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 150 flight time total : 5000 flight time type : 175 |
| ASRS Report | 328373 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : overshoot conflict : airborne less severe non adherence : clearance non adherence : required legal separation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | unspecified : 700 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
While on a descent to 8000 ft we were handed off from one controller to another. At the same time we were accomplishing items on the in-range checklist. I was the PF, and I inadvertently descended below 8000 ft. Upon noticing this, I quickly returned to altitude of 8000 ft. Before landing, approach control asked us to call the tower (or ATC) supervisor on duty. I contacted this individual and he stated that their equipment alarm went off to show inadequate vertical separation between us and another aircraft. On our return flight, we did an operational check with the same approach facility of our encoding altimeters. One system appeared to be off by 150- 200 ft and the aircraft was subsequently written up for altimeter discrepancy. Contributing factors to a poor level off of altitude were trying to accomplish a checklist in a descent, aircraft is not equipped with autoplt or a flight director with altitude capture capability, and fatigue due to many flight segments/long hours, this was leg 25 out of 26 in a 4 day period.
Original NASA ASRS Text
Title: CAPT OF AN LTT OVERSHOT DSCNT ALT RESULTING IN LOSS OF STANDARD SEPARATION WITH OTHER TFC.
Narrative: WHILE ON A DSCNT TO 8000 FT WE WERE HANDED OFF FROM ONE CTLR TO ANOTHER. AT THE SAME TIME WE WERE ACCOMPLISHING ITEMS ON THE IN-RANGE CHKLIST. I WAS THE PF, AND I INADVERTENTLY DSNDED BELOW 8000 FT. UPON NOTICING THIS, I QUICKLY RETURNED TO ALT OF 8000 FT. BEFORE LNDG, APCH CTL ASKED US TO CALL THE TWR (OR ATC) SUPVR ON DUTY. I CONTACTED THIS INDIVIDUAL AND HE STATED THAT THEIR EQUIP ALARM WENT OFF TO SHOW INADEQUATE VERT SEPARATION BTWN US AND ANOTHER ACFT. ON OUR RETURN FLT, WE DID AN OPERATIONAL CHK WITH THE SAME APCH FACILITY OF OUR ENCODING ALTIMETERS. ONE SYS APPEARED TO BE OFF BY 150- 200 FT AND THE ACFT WAS SUBSEQUENTLY WRITTEN UP FOR ALTIMETER DISCREPANCY. CONTRIBUTING FACTORS TO A POOR LEVEL OFF OF ALT WERE TRYING TO ACCOMPLISH A CHKLIST IN A DSCNT, ACFT IS NOT EQUIPPED WITH AUTOPLT OR A FLT DIRECTOR WITH ALT CAPTURE CAPABILITY, AND FATIGUE DUE TO MANY FLT SEGMENTS/LONG HRS, THIS WAS LEG 25 OUT OF 26 IN A 4 DAY PERIOD.
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.