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An medium large transport flying in ZNY airspace fails to copy altitude cleared to properly and descends below cleared altitude.
| Attributes | |
| ACN | 382280 |
| Time | |
| Date | 199710 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : bdl |
| State Reference | CT |
| Altitude | msl bound lower : 10000 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : atp pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 140 flight time total : 18000 flight time type : 1600 |
| ASRS Report | 382280 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance non adherence : published procedure other anomaly other |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
The controller (ZNY) gave us several instructions in one sentence which included fly direct to bdl VOR, descent to altitude, reduce to 250 KTS, cross DME at specified altitude, plus frequency change. The captain read back 10000 ft as the altitude. The frequency change was to bdl approach and he said he didn't clear us to 10000 ft, so why were we going down to 10000 ft? We said the previous controller had cleared us to 10000 ft. He told us to maintain 11000 ft, so we climbed back up (we had gone a little below 11000 ft when this happened). The captain had read back 10000 ft and the new york city controller hadn't caught the difference. The controllers shouldn't give multiple instructions in 1 transmission. But if they do, they should listen for an accurate readback.
Original NASA ASRS Text
Title: AN MLG FLYING IN ZNY AIRSPACE FAILS TO COPY ALT CLRED TO PROPERLY AND DSNDS BELOW CLRED ALT.
Narrative: THE CTLR (ZNY) GAVE US SEVERAL INSTRUCTIONS IN ONE SENTENCE WHICH INCLUDED FLY DIRECT TO BDL VOR, DSCNT TO ALT, REDUCE TO 250 KTS, CROSS DME AT SPECIFIED ALT, PLUS FREQ CHANGE. THE CAPT READ BACK 10000 FT AS THE ALT. THE FREQ CHANGE WAS TO BDL APCH AND HE SAID HE DIDN'T CLR US TO 10000 FT, SO WHY WERE WE GOING DOWN TO 10000 FT? WE SAID THE PREVIOUS CTLR HAD CLRED US TO 10000 FT. HE TOLD US TO MAINTAIN 11000 FT, SO WE CLBED BACK UP (WE HAD GONE A LITTLE BELOW 11000 FT WHEN THIS HAPPENED). THE CAPT HAD READ BACK 10000 FT AND THE NEW YORK CITY CTLR HADN'T CAUGHT THE DIFFERENCE. THE CTLRS SHOULDN'T GIVE MULTIPLE INSTRUCTIONS IN 1 XMISSION. BUT IF THEY DO, THEY SHOULD LISTEN FOR AN ACCURATE READBACK.
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.