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A small air carrier aircraft suffers the dual loss of both inverters, experiencing an altitude and course deviation in the process near lyh, va.
| Attributes | |
| ACN | 530366 |
| Time | |
| Date | 200111 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : lyh.airport |
| State Reference | VA |
| Altitude | msl single value : 16000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : lyh.tower tower : fxe.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial pilot : cfi |
| Experience | flight time last 90 days : 24 flight time total : 850 flight time type : 24 |
| ASRS Report | 530366 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : excursion from assigned altitude non adherence : far non adherence : clearance other spatial deviation |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Aircraft |
Narrative:
While en route, we experienced a dual inverter failure, resulting in the loss of all primary navigation instruments. The problem was that we lost our primary, heading data, attitude and altitude information. While troubleshooting the problem. We may have deviated from our assigned altitude, and course, thus violating an far.
Original NASA ASRS Text
Title: A SMALL ACR ACFT SUFFERS THE DUAL LOSS OF BOTH INVERTERS, EXPERIENCING AN ALT AND COURSE DEV IN THE PROCESS NEAR LYH, VA.
Narrative: WHILE ENRTE, WE EXPERIENCED A DUAL INVERTER FAILURE, RESULTING IN THE LOSS OF ALL PRIMARY NAV INSTS. THE PROB WAS THAT WE LOST OUR PRIMARY, HDG DATA, ATTITUDE AND ALT INFO. WHILE TROUBLESHOOTING THE PROB. WE MAY HAVE DEVIATED FROM OUR ASSIGNED ALT, AND COURSE, THUS VIOLATING AN FAR.
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.