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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Flight crew of an large transport failed to cross an arrival fix at assigned altitude (too high) and later, while on autoplt altitude hold, descended below assigned altitude. On each occasion, the reporter caught his mistake and corrected back to the assigned altitude.
| Attributes | |
| ACN | 391250 |
| Time | |
| Date | 199801 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : fjc airport : lga |
| State Reference | PA |
| Altitude | msl bound lower : 13000 msl bound upper : 13400 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : n90 |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Route In Use | arrival other arrival star : star enroute airway : zny enroute airway : n90 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 70 flight time total : 10000 flight time type : 200 |
| ASRS Report | 391250 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | altitude deviation : overshoot altitude deviation : crossing restriction not met non adherence : clearance non adherence : published procedure |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On a flight from ord to lga. The flight was cleared for the mip mip 1 arrival. Later the clearance was for a crossing at vibes intersection at 13000 ft. It was crossed at 13400 ft. Later on while being vectored by approach for an ILS to runway 24 at lga, which had an RVR of 1600-1800 ft RVR. 1800 ft was required for the approach. The controller cleared the flight to 7000 ft. The autoplt was on, and while getting set up for the actual approach, and looking at the option of going to an alternate, the aircraft descended to 6700 ft and the altitude alert on the aircraft sounded. The autoplt was immediately disconnected and the aircraft was climbed back up to 7000 ft. There was the distraction of looking for suitable airports because before takeoff from chicago the WX forecast at the ny area was for VFR or MVFR, and not IFR.
Original NASA ASRS Text
Title: FLC OF AN LGT FAILED TO CROSS AN ARR FIX AT ASSIGNED ALT (TOO HIGH) AND LATER, WHILE ON AUTOPLT ALT HOLD, DSNDED BELOW ASSIGNED ALT. ON EACH OCCASION, THE RPTR CAUGHT HIS MISTAKE AND CORRECTED BACK TO THE ASSIGNED ALT.
Narrative: ON A FLT FROM ORD TO LGA. THE FLT WAS CLRED FOR THE MIP MIP 1 ARR. LATER THE CLRNC WAS FOR A XING AT VIBES INTXN AT 13000 FT. IT WAS CROSSED AT 13400 FT. LATER ON WHILE BEING VECTORED BY APCH FOR AN ILS TO RWY 24 AT LGA, WHICH HAD AN RVR OF 1600-1800 FT RVR. 1800 FT WAS REQUIRED FOR THE APCH. THE CTLR CLRED THE FLT TO 7000 FT. THE AUTOPLT WAS ON, AND WHILE GETTING SET UP FOR THE ACTUAL APCH, AND LOOKING AT THE OPTION OF GOING TO AN ALTERNATE, THE ACFT DSNDED TO 6700 FT AND THE ALT ALERT ON THE ACFT SOUNDED. THE AUTOPLT WAS IMMEDIATELY DISCONNECTED AND THE ACFT WAS CLBED BACK UP TO 7000 FT. THERE WAS THE DISTR OF LOOKING FOR SUITABLE ARPTS BECAUSE BEFORE TKOF FROM CHICAGO THE WX FORECAST AT THE NY AREA WAS FOR VFR OR MVFR, AND NOT IFR.
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.