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Altitude deviation altitude overshot by a B737-800 flight crew with an improperly set altimeter during a change in holding on the korry 1 STAR into lga, ny.
| Attributes | |
| ACN | 546000 |
| Time | |
| Date | 200204 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | intersection : holey |
| State Reference | NJ |
| Altitude | msl bound lower : 12600 msl bound upper : 13300 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Turbulence Thunderstorm Rain |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other vortac |
| Flight Phase | descent : holding descent : intermediate altitude |
| Route In Use | arrival star : korry 1 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 240 flight time total : 8000 flight time type : 2600 |
| ASRS Report | 546000 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : atp pilot : flight engineer pilot : multi engine |
| Experience | flight time last 90 days : 210 flight time total : 15000 flight time type : 10000 |
| ASRS Report | 545818 |
| Events | |
| Anomaly | altitude deviation : overshoot inflight encounter : weather non adherence : clearance other anomaly other |
| Independent Detector | atc equipment other atc equipment : radar other controllera other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance controller : issued advisory flight crew : exited adverse environment flight crew : returned to assigned altitude flight crew : overrode automation flight crew : became reoriented other |
| Consequence | faa : reviewed incident with flight crew other |
| Supplementary | |
| Problem Areas | Environmental Factor Flight Crew Human Performance Weather Chart Or Publication Airspace Structure ATC Human Performance |
| Primary Problem | Weather |
| Air Traffic Incident | Pilot Deviation |
Narrative:
During arrival on the korry 1 to lga at night, IFR, with severe thunderstorms, we were issued holding at holey intersection and cleared to descend to and hold at 17000 ft from FL270. While entering the hold at holey still descending and slowing to holding speed, ATC issued a new hold over stefe intersection due to thunderstorm approaching holey. Had trouble finding stefe since it is not on any lga arrs nor on the new york area chart that we had out. Also, the clearance was unclr as to when to go to stefe and hold due to high controller workload. It took some time to clarify the location of stefe and the proper holding procedure adding to the confusion of typing all of this into the FMC. ATC tried to help us by giving us another hold at the dqo 053 degree radial at 25 DME, but this actually caused more workload due to reprogramming the FMC. We were also cleared to expedite to 13000 ft. Note: there is only some 20 air mi between holey and stefe, so time was compressed. Raw data was used. With all of this happening, we missed the in-range checklist and our altimeters were set to 29.92 when they should have been at 29.54. This put us 380 ft low at approximately 12620 ft. ATC called to confirm our altitude and the error was discovered. During correction, aircraft overshoot of 300 ft occurred before leveling at 13000 ft. ATC called to confirm our level, which at that point had been corrected back to 13000 ft. The remainder of flight was uneventful. A high workload in deteriorating/severe WX conditions along with the desire to properly program/employ the FMC in a time compressed period presented a distraction.
Original NASA ASRS Text
Title: ALTDEV ALT OVERSHOT BY A B737-800 FLC WITH AN IMPROPERLY SET ALTIMETER DURING A CHANGE IN HOLDING ON THE KORRY 1 STAR INTO LGA, NY.
Narrative: DURING ARR ON THE KORRY 1 TO LGA AT NIGHT, IFR, WITH SEVERE TSTMS, WE WERE ISSUED HOLDING AT HOLEY INTXN AND CLRED TO DSND TO AND HOLD AT 17000 FT FROM FL270. WHILE ENTERING THE HOLD AT HOLEY STILL DSNDING AND SLOWING TO HOLDING SPD, ATC ISSUED A NEW HOLD OVER STEFE INTXN DUE TO TSTM APCHING HOLEY. HAD TROUBLE FINDING STEFE SINCE IT IS NOT ON ANY LGA ARRS NOR ON THE NEW YORK AREA CHART THAT WE HAD OUT. ALSO, THE CLRNC WAS UNCLR AS TO WHEN TO GO TO STEFE AND HOLD DUE TO HIGH CTLR WORKLOAD. IT TOOK SOME TIME TO CLARIFY THE LOCATION OF STEFE AND THE PROPER HOLDING PROC ADDING TO THE CONFUSION OF TYPING ALL OF THIS INTO THE FMC. ATC TRIED TO HELP US BY GIVING US ANOTHER HOLD AT THE DQO 053 DEG RADIAL AT 25 DME, BUT THIS ACTUALLY CAUSED MORE WORKLOAD DUE TO REPROGRAMMING THE FMC. WE WERE ALSO CLRED TO EXPEDITE TO 13000 FT. NOTE: THERE IS ONLY SOME 20 AIR MI BTWN HOLEY AND STEFE, SO TIME WAS COMPRESSED. RAW DATA WAS USED. WITH ALL OF THIS HAPPENING, WE MISSED THE IN-RANGE CHKLIST AND OUR ALTIMETERS WERE SET TO 29.92 WHEN THEY SHOULD HAVE BEEN AT 29.54. THIS PUT US 380 FT LOW AT APPROX 12620 FT. ATC CALLED TO CONFIRM OUR ALT AND THE ERROR WAS DISCOVERED. DURING CORRECTION, ACFT OVERSHOOT OF 300 FT OCCURRED BEFORE LEVELING AT 13000 FT. ATC CALLED TO CONFIRM OUR LEVEL, WHICH AT THAT POINT HAD BEEN CORRECTED BACK TO 13000 FT. THE REMAINDER OF FLT WAS UNEVENTFUL. A HIGH WORKLOAD IN DETERIORATING/SEVERE WX CONDITIONS ALONG WITH THE DESIRE TO PROPERLY PROGRAM/EMPLOY THE FMC IN A TIME COMPRESSED PERIOD PRESENTED A DISTR.
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.