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Captain of an light transport executive jet failed to maintain assigned altitude when he started descending on the GS resulting in descending into class D airspace before being cleared for the approach.
| Attributes | |
| ACN | 378930 |
| Time | |
| Date | 199709 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : pie |
| State Reference | FL |
| Altitude | msl bound lower : 2200 msl bound upper : 2600 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : pie |
| Operator | general aviation : corporate |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 8600 flight time type : 180 |
| ASRS Report | 378930 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance non adherence : far |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
While being vectored for the ILS runway 17R approach at pie, fl, we were given instructions to intercept the localizer inbound. We were also told to maintain 2600 ft and that we should expect to be vectored off the approach due to a slower aircraft that we were following. We intercepted the localizer inbound. At GS intercept, the captain started to descend. I told the captain that we were to maintain 2600 ft and that we were not yet cleared for the approach. The captain argued that we had been cleared and continued to descend. I called approach to verify our clearance. Approach verified that we were to maintain 2600 ft. At this point we broke out of the overcast. The captain called airport in sight. I informed approach. Approach angrily informed us that we were below our assigned altitude and to contact the tower. The landing was without incident.
Original NASA ASRS Text
Title: CAPT OF AN LTT EXECUTIVE JET FAILED TO MAINTAIN ASSIGNED ALT WHEN HE STARTED DSNDING ON THE GS RESULTING IN DSNDING INTO CLASS D AIRSPACE BEFORE BEING CLRED FOR THE APCH.
Narrative: WHILE BEING VECTORED FOR THE ILS RWY 17R APCH AT PIE, FL, WE WERE GIVEN INSTRUCTIONS TO INTERCEPT THE LOC INBOUND. WE WERE ALSO TOLD TO MAINTAIN 2600 FT AND THAT WE SHOULD EXPECT TO BE VECTORED OFF THE APCH DUE TO A SLOWER ACFT THAT WE WERE FOLLOWING. WE INTERCEPTED THE LOC INBOUND. AT GS INTERCEPT, THE CAPT STARTED TO DSND. I TOLD THE CAPT THAT WE WERE TO MAINTAIN 2600 FT AND THAT WE WERE NOT YET CLRED FOR THE APCH. THE CAPT ARGUED THAT WE HAD BEEN CLRED AND CONTINUED TO DSND. I CALLED APCH TO VERIFY OUR CLRNC. APCH VERIFIED THAT WE WERE TO MAINTAIN 2600 FT. AT THIS POINT WE BROKE OUT OF THE OVCST. THE CAPT CALLED ARPT IN SIGHT. I INFORMED APCH. APCH ANGRILY INFORMED US THAT WE WERE BELOW OUR ASSIGNED ALT AND TO CONTACT THE TWR. THE LNDG WAS WITHOUT INCIDENT.
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.