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Altitude deviation on visual approach. Flight crew distraction with a comparator (compass pitch and roll) warning. Aircraft lost 450 ft, but flight crew returned aircraft back to altitude immediately.
| Attributes | |
| ACN | 332958 |
| Time | |
| Date | 199604 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : lga |
| State Reference | NY |
| Altitude | msl bound lower : 3150 msl bound upper : 3500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : lga |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 19000 flight time type : 7000 |
| ASRS Report | 332958 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : cfi pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 6900 |
| ASRS Report | 333498 |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude non adherence : clearance |
| 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 vector for river visual runway 13 at lga.) on being cleared for river visual we were told to hold 3500 ft until abeam central park. 1 mi before that we got an alert for a comparator (pitch and roll). While looking for the problem we descended to 3150 ft and then corrected back to 3500 ft. This also was when we were handed off to tower and no one said anything and landing/approach was normal. Our attention was distracted by several items and copilot was hand-flying approach and became busy with these other distractions. The correction was made immediately.
Original NASA ASRS Text
Title: ALTDEV ON VISUAL APCH. FLC DISTR WITH A COMPARATOR (COMPASS PITCH AND ROLL) WARNING. ACFT LOST 450 FT, BUT FLC RETURNED ACFT BACK TO ALT IMMEDIATELY.
Narrative: (ON VECTOR FOR RIVER VISUAL RWY 13 AT LGA.) ON BEING CLRED FOR RIVER VISUAL WE WERE TOLD TO HOLD 3500 FT UNTIL ABEAM CENTRAL PARK. 1 MI BEFORE THAT WE GOT AN ALERT FOR A COMPARATOR (PITCH AND ROLL). WHILE LOOKING FOR THE PROB WE DSNDED TO 3150 FT AND THEN CORRECTED BACK TO 3500 FT. THIS ALSO WAS WHEN WE WERE HANDED OFF TO TWR AND NO ONE SAID ANYTHING AND LNDG/APCH WAS NORMAL. OUR ATTN WAS DISTRACTED BY SEVERAL ITEMS AND COPLT WAS HAND-FLYING APCH AND BECAME BUSY WITH THESE OTHER DISTRACTIONS. THE CORRECTION WAS MADE IMMEDIATELY.
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.