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Failure of electrical equipment cooling system, followed by failure of first officer's ADI followed by smell of electrical smoke leads to precautionary return to departure field for landing.
| Attributes | |
| ACN | 436296 |
| Time | |
| Date | 199905 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : sat.airport |
| State Reference | TX |
| Altitude | msl single value : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sat.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : initial |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : commercial pilot : cfi pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 200 flight time total : 8000 flight time type : 200 |
| ASRS Report | 436296 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 2000 flight time total : 12000 flight time type : 8000 |
| ASRS Report | 436206 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly |
| Independent Detector | aircraft equipment other aircraft equipment : equip.cooling lights |
| Resolutory Action | flight crew : landed as precaution |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
During initial climb out from sat, the equipment cooling supply and exhaust fan off lights illuminated. Switches were moved from normal to alternate, but both off lights remained illuminated and at one point alternately flashing. Checklists were run but lights stayed illuminated along with master caution illuminated. The first officer's ADI went blank and a strong odor was reported by the lead flight attendant. Odor was then evident in cockpit (plastic burning). Electrical fire/smoke checklist run and odor stopped. Discussion using CRM was used and a return to sat was accomplished in the interest of safety. Overweight landing was uneventful. Aircraft was turned over to maintenance for checks and inspections.
Original NASA ASRS Text
Title: FAILURE OF ELECTRICAL EQUIP COOLING SYS, FOLLOWED BY FAILURE OF FO'S ADI FOLLOWED BY SMELL OF ELECTRICAL SMOKE LEADS TO PRECAUTIONARY RETURN TO DEP FIELD FOR LNDG.
Narrative: DURING INITIAL CLBOUT FROM SAT, THE EQUIP COOLING SUPPLY AND EXHAUST FAN OFF LIGHTS ILLUMINATED. SWITCHES WERE MOVED FROM NORMAL TO ALTERNATE, BUT BOTH OFF LIGHTS REMAINED ILLUMINATED AND AT ONE POINT ALTERNATELY FLASHING. CHKLISTS WERE RUN BUT LIGHTS STAYED ILLUMINATED ALONG WITH MASTER CAUTION ILLUMINATED. THE FO'S ADI WENT BLANK AND A STRONG ODOR WAS RPTED BY THE LEAD FLT ATTENDANT. ODOR WAS THEN EVIDENT IN COCKPIT (PLASTIC BURNING). ELECTRICAL FIRE/SMOKE CHKLIST RUN AND ODOR STOPPED. DISCUSSION USING CRM WAS USED AND A RETURN TO SAT WAS ACCOMPLISHED IN THE INTEREST OF SAFETY. OVERWT LNDG WAS UNEVENTFUL. ACFT WAS TURNED OVER TO MAINT FOR CHKS AND INSPECTIONS.
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.