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Alternator malfunction caused radio, transponder and mode C failure. Reporter remained clear of class B airspace, but penetrated the 30 mi mode C veil in order to land at his destination airport.
| Attributes | |
| ACN | 323316 |
| Time | |
| Date | 199512 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : mco airport : ism |
| State Reference | FL |
| Altitude | msl bound lower : 2000 msl bound upper : 2000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : mco tower : bdl |
| Operator | general aviation : personal |
| Make Model Name | Experimental |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : approach descent other landing other |
| Route In Use | arrival other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : cfi pilot : commercial |
| Experience | flight time last 90 days : 2 flight time total : 8600 flight time type : 450 |
| ASRS Report | 323316 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : far other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : unable |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Alternator failure, consequently no power for radio and radio had very little power. Lights were on display, but no xmissions. Therefore, the mode 'C' didn't work also. I just didn't realize that the transponder was not working. Since I couldn't raise orlando I remained clear of class B airspace. I inadvertently went in the 30 mi circle without mode C transponder. Callback conversation with reporter revealed the following information: reporter stated that alternator failed en route from alabama and he did not realize it until he attempted to contact orlando approach control. Reporter states he remained clear of class B airspace and landed at ism using visual light signals from the tower. ATC has never contacted him regarding the incident.
Original NASA ASRS Text
Title: ALTERNATOR MALFUNCTION CAUSED RADIO, XPONDER AND MODE C FAILURE. RPTR REMAINED CLR OF CLASS B AIRSPACE, BUT PENETRATED THE 30 MI MODE C VEIL IN ORDER TO LAND AT HIS DEST ARPT.
Narrative: ALTERNATOR FAILURE, CONSEQUENTLY NO PWR FOR RADIO AND RADIO HAD VERY LITTLE PWR. LIGHTS WERE ON DISPLAY, BUT NO XMISSIONS. THEREFORE, THE MODE 'C' DIDN'T WORK ALSO. I JUST DIDN'T REALIZE THAT THE XPONDER WAS NOT WORKING. SINCE I COULDN'T RAISE ORLANDO I REMAINED CLR OF CLASS B AIRSPACE. I INADVERTENTLY WENT IN THE 30 MI CIRCLE WITHOUT MODE C XPONDER. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT ALTERNATOR FAILED ENRTE FROM ALABAMA AND HE DID NOT REALIZE IT UNTIL HE ATTEMPTED TO CONTACT ORLANDO APCH CTL. RPTR STATES HE REMAINED CLR OF CLASS B AIRSPACE AND LANDED AT ISM USING VISUAL LIGHT SIGNALS FROM THE TWR. ATC HAS NEVER CONTACTED HIM REGARDING THE INCIDENT.
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.