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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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An small transport flight crew on a government contract descends below their assigned altitude. The ARTCC radar controller apparently misheard their readback.
| Attributes | |
| ACN | 348460 |
| Time | |
| Date | 199609 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : acy |
| State Reference | NJ |
| Altitude | msl bound lower : 6500 msl bound upper : 8000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc tracon : acy |
| Operator | common carrier : air taxi |
| Make Model Name | Gates Learjet Corp Undifferentiated or Other Model |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 5000 flight time type : 3500 |
| ASRS Report | 348460 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : far non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
En route descent into acy. ZDC clears us out of 14000 ft for 8000 ft. I responded the instruction. A few mins later ZDC clears us down to 6000 ft. I responded to the instruction over the radio and continued descent. ZDC sent us to acy approach control. Approach control asked our altitude. I told them I was out of 6500 ft for 6000 ft. Approach asked if we were cleared to 6000 ft. I told them center had cleared us to 6000 ft and I had read back the instruction. The approach controller said center had only cleared us to 8000 ft.
Original NASA ASRS Text
Title: AN SMT FLC ON A GOV CONTRACT DSNDS BELOW THEIR ASSIGNED ALT. THE ARTCC RADAR CTLR APPARENTLY MISHEARD THEIR READBACK.
Narrative: ENRTE DSCNT INTO ACY. ZDC CLRS US OUT OF 14000 FT FOR 8000 FT. I RESPONDED THE INSTRUCTION. A FEW MINS LATER ZDC CLRS US DOWN TO 6000 FT. I RESPONDED TO THE INSTRUCTION OVER THE RADIO AND CONTINUED DSCNT. ZDC SENT US TO ACY APCH CTL. APCH CTL ASKED OUR ALT. I TOLD THEM I WAS OUT OF 6500 FT FOR 6000 FT. APCH ASKED IF WE WERE CLRED TO 6000 FT. I TOLD THEM CTR HAD CLRED US TO 6000 FT AND I HAD READ BACK THE INSTRUCTION. THE APCH CTLR SAID CTR HAD ONLY CLRED US TO 8000 FT.
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.