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An MD80 in cruise had chattering relay sound behind captain's seat with windshield heat and drain mast circuit breaker trip. Reset windshield heat breakers and operation normal. Drain mast heater breaker not reset.
| Attributes | |
| ACN | 573733 |
| Time | |
| Date | 200302 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : fmn.airport |
| State Reference | NM |
| Aircraft 1 | |
| Controlling Facilities | artcc : zab.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 573733 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : multi engine |
| ASRS Report | 573735 |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : circuit breaker trip other flight crewa other flight crewb |
| Resolutory Action | flight crew : overcame equipment problem |
| Consequence | other other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Weather Aircraft |
| Primary Problem | Aircraft |
Narrative:
Chattering relay noise heard behind captain's seat -- then found 3 windshield anti-ice circuit breakers tripped as well as both drain mast heater circuit breakers. Reviewed QRH window anti-ice inoperative and circuit breaker reset procedures. Contacted dispatch and we both agreed that being in icing conditions that it would be prudent for one reset attempt of the windshield anti-ice circuit breakers for safety of flight considerations. They reset and stayed in for remainder of flight. Did not reset drain mast circuit breakers.
Original NASA ASRS Text
Title: AN MD80 IN CRUISE HAD CHATTERING RELAY SOUND BEHIND CAPT'S SEAT WITH WINDSHIELD HEAT AND DRAIN MAST CIRCUIT BREAKER TRIP. RESET WINDSHIELD HEAT BREAKERS AND OP NORMAL. DRAIN MAST HEATER BREAKER NOT RESET.
Narrative: CHATTERING RELAY NOISE HEARD BEHIND CAPT'S SEAT -- THEN FOUND 3 WINDSHIELD ANTI-ICE CIRCUIT BREAKERS TRIPPED AS WELL AS BOTH DRAIN MAST HEATER CIRCUIT BREAKERS. REVIEWED QRH WINDOW ANTI-ICE INOP AND CB RESET PROCS. CONTACTED DISPATCH AND WE BOTH AGREED THAT BEING IN ICING CONDITIONS THAT IT WOULD BE PRUDENT FOR ONE RESET ATTEMPT OF THE WINDSHIELD ANTI-ICE CIRCUIT BREAKERS FOR SAFETY OF FLT CONSIDERATIONS. THEY RESET AND STAYED IN FOR REMAINDER OF FLT. DID NOT RESET DRAIN MAST CIRCUIT BREAKERS.
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.