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Flight crew descended 400 ft below assigned altitude of 13000 ft to 12600 ft before returning to assigned altitude. Altitude deviation altitude overshot.
| Attributes | |
| ACN | 306820 |
| Time | |
| Date | 199506 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : scy airport : dfw |
| State Reference | TX |
| Altitude | msl bound lower : 12600 msl bound upper : 13000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zfw |
| Operator | common carrier : air carrier |
| Make Model Name | B737-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Route In Use | arrival other arrival star : star enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 16000 flight time type : 10000 |
| ASRS Report | 306820 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
During descent towards scy VOR ZFW gave us several heading changes, and several step down altitudes. We were never advised of conflicting traffic, nor did I see any on TCASII. In the meantime I asked the first officer to contact company and give an 'in range call' and talk to maintenance about a problem we had. We were cleared to 13000 ft and I descended to 12600 ft. I was concerned about making a 7000 ft crossing restr, 6 mi northwest of scy VOR. We had just swapped airplanes, after flying a B737/300 with automatic level off to a B737/200 without automatic leveloff. The first officer was distracted by the company radio. ZFW seemed confused giving several level off altitudes and heading changes.
Original NASA ASRS Text
Title: FLC DSNDED 400 FT BELOW ASSIGNED ALT OF 13000 FT TO 12600 FT BEFORE RETURNING TO ASSIGNED ALT. ALTDEV ALT OVERSHOT.
Narrative: DURING DSCNT TOWARDS SCY VOR ZFW GAVE US SEVERAL HDG CHANGES, AND SEVERAL STEP DOWN ALTS. WE WERE NEVER ADVISED OF CONFLICTING TFC, NOR DID I SEE ANY ON TCASII. IN THE MEANTIME I ASKED THE FO TO CONTACT COMPANY AND GIVE AN 'IN RANGE CALL' AND TALK TO MAINT ABOUT A PROB WE HAD. WE WERE CLRED TO 13000 FT AND I DSNDED TO 12600 FT. I WAS CONCERNED ABOUT MAKING A 7000 FT XING RESTR, 6 MI NW OF SCY VOR. WE HAD JUST SWAPPED AIRPLANES, AFTER FLYING A B737/300 WITH AUTO LEVEL OFF TO A B737/200 WITHOUT AUTO LEVELOFF. THE FO WAS DISTRACTED BY THE COMPANY RADIO. ZFW SEEMED CONFUSED GIVING SEVERAL LEVEL OFF ALTS AND HDG CHANGES.
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.