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The improper operation monitoring of the autoplt altitude function led to an air carrier's excursion from assigned altitude.
| Attributes | |
| ACN | 297380 |
| Time | |
| Date | 199502 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : stx |
| State Reference | PR |
| Altitude | msl bound lower : 11000 msl bound upper : 11450 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude cruise other |
| Route In Use | enroute airway : mjzs |
| 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 : 150 flight time total : 6500 flight time type : 2500 |
| ASRS Report | 297380 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 5000 flight time type : 4000 |
| ASRS Report | 297384 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
This report is regarding a flight from sju to stx. A clearance was received from sju center to climb to and maintain 11000 ft. Approaching 10000 ft, the captain engaged autoplt, and subsequently began level off at 11000 ft several moments later, altitude alert sounded followed, shortly by a comment from the controller. Captain initiated a correction, immediately, upon hearing altitude alert warning, and returned to 11000 ft. Controller stated that deviation was 'no problem.' supplemental information from acn 297384: I might not have clicked the autoplt switch on all the way.
Original NASA ASRS Text
Title: THE IMPROPER OP MONITORING OF THE AUTOPLT ALT FUNCTION LED TO AN ACR'S EXCURSION FROM ASSIGNED ALT.
Narrative: THIS RPT IS REGARDING A FLT FROM SJU TO STX. A CLRNC WAS RECEIVED FROM SJU CTR TO CLB TO AND MAINTAIN 11000 FT. APCHING 10000 FT, THE CAPT ENGAGED AUTOPLT, AND SUBSEQUENTLY BEGAN LEVEL OFF AT 11000 FT SEVERAL MOMENTS LATER, ALT ALERT SOUNDED FOLLOWED, SHORTLY BY A COMMENT FROM THE CTLR. CAPT INITIATED A CORRECTION, IMMEDIATELY, UPON HEARING ALT ALERT WARNING, AND RETURNED TO 11000 FT. CTLR STATED THAT DEV WAS 'NO PROB.' SUPPLEMENTAL INFO FROM ACN 297384: I MIGHT NOT HAVE CLICKED THE AUTOPLT SWITCH ON ALL THE WAY.
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.