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CL65 captured a false lga 22 localizer and GS causing altitude and as deviations as the aircraft pitched up and accelerated.
| Attributes | |
| ACN | 808745 |
| Time | |
| Date | 200810 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : lga.airport |
| State Reference | NY |
| Altitude | msl single value : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : lax.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet 200 ER&LR |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 22 |
| Flight Phase | descent : approach ground : maintenance |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 10000 flight time type : 8000 |
| ASRS Report | 808745 |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude other anomaly |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : regained aircraft control |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
ATC had vectored us onto a right dogleg/base to intercept the localizer and had cleared us for the ILS runway 22 at lga. Approximately 2 NM southwest of the localizer; we had a false and simultaneous capture of the localizer and GS. The GS quickly went from centered to a well below GS indication. The autoplt abruptly pitched up and began to climb above our assigned altitude of 3000 ft. I disengaged the autoplt and pitched over arresting our climb just below 3300 ft and descended to 3000 ft. During the recovery; our airspeed increased about 10 KTS above assigned but was corrected. TCAS was not a factor.
Original NASA ASRS Text
Title: CL65 CAPTURED A FALSE LGA 22 LOC AND GS CAUSING ALT AND AS DEVS AS THE ACFT PITCHED UP AND ACCELERATED.
Narrative: ATC HAD VECTORED US ONTO A R DOGLEG/BASE TO INTERCEPT THE LOC AND HAD CLRED US FOR THE ILS RWY 22 AT LGA. APPROX 2 NM SW OF THE LOC; WE HAD A FALSE AND SIMULTANEOUS CAPTURE OF THE LOC AND GS. THE GS QUICKLY WENT FROM CTRED TO A WELL BELOW GS INDICATION. THE AUTOPLT ABRUPTLY PITCHED UP AND BEGAN TO CLB ABOVE OUR ASSIGNED ALT OF 3000 FT. I DISENGAGED THE AUTOPLT AND PITCHED OVER ARRESTING OUR CLB JUST BELOW 3300 FT AND DSNDED TO 3000 FT. DURING THE RECOVERY; OUR AIRSPD INCREASED ABOUT 10 KTS ABOVE ASSIGNED BUT WAS CORRECTED. TCAS WAS NOT A FACTOR.
Data retrieved from NASA's ASRS site as of May 2009 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.