|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1201 To 1800|
|Locale Reference||airport : sql|
|Altitude||msl bound lower : 4000|
msl bound upper : 4000
|Controlling Facilities||tracon : oak|
|Operator||general aviation : personal|
|Make Model Name||Small Transport, Low Wing, 2 Recip Eng|
|Flight Phase||climbout : intermediate altitude|
|Route In Use||enroute : direct|
enroute : on vectors
|Function||instruction : instructor|
oversight : pic
|Qualification||pilot : cfi|
pilot : flight engineer
pilot : atp
|Experience||flight time last 90 days : 100|
flight time total : 8500
flight time type : 20
|Function||flight crew : single pilot|
|Qualification||pilot : commercial|
pilot : instrument
|Anomaly||aircraft equipment problem : critical|
|Independent Detector||other flight crewa|
|Resolutory Action||flight crew : overcame equipment problem|
|Air Traffic Incident||other|
I was serving as PIC/instructor flying with the owner who is not multi-engine rated. Small transport aircraft had both engines replaced with zero-time engines and maintenance requested 25 hours operation prior to 'fine-tuning.' planned flight was sql-sck-sac-sql. We blocked out at PM35 local time, did an extensive runup, and took off at PM55. On climb out, everything was looking good. While climbing through 4000 ft, both of us thought we smelled something burning and asked the other to confirm our suspicions. It was an electrical burning smell. About 15 seconds later smoke began coming out from between the top of the instrument panel and the glare shield, right behind the RPM gauge. 10 seconds after the smoke was noticed, it began pouring out rapidly. Immediately, we shut off the avionics power, both alternators and the battery/master power. We began a descent and turned back towards sql. The smoke stopped within 10 seconds. (We opted to return to sql for ease of maintenance, knowing if conditions worsened we could divert to hwd). After 3 mins, we turned the electrical equipment back on 1 switch at a time. We descended to 2000 ft and called bay approach for transition and to advise them of our situation. We did not declare an emergency. Bay cleared us direct to sql and advised sql tower we were en route. We landed without incident. I forgot to mention earlier that we also depressurized the cabin during descent to quickly clear the smoke. The source of the smoke is being investigated.
Original NASA ASRS Text
Title: RETURN LAND MANDATED FOR SMT AFTER FLC DISTR SMOKE IN COCKPIT.
Narrative: I WAS SERVING AS PIC/INSTRUCTOR FLYING WITH THE OWNER WHO IS NOT MULTI-ENG RATED. SMT ACFT HAD BOTH ENGS REPLACED WITH ZERO-TIME ENGS AND MAINT REQUESTED 25 HRS OP PRIOR TO 'FINE-TUNING.' PLANNED FLT WAS SQL-SCK-SAC-SQL. WE BLOCKED OUT AT PM35 LCL TIME, DID AN EXTENSIVE RUNUP, AND TOOK OFF AT PM55. ON CLB OUT, EVERYTHING WAS LOOKING GOOD. WHILE CLBING THROUGH 4000 FT, BOTH OF US THOUGHT WE SMELLED SOMETHING BURNING AND ASKED THE OTHER TO CONFIRM OUR SUSPICIONS. IT WAS AN ELECTRICAL BURNING SMELL. ABOUT 15 SECONDS LATER SMOKE BEGAN COMING OUT FROM BTWN THE TOP OF THE INST PANEL AND THE GLARE SHIELD, RIGHT BEHIND THE RPM GAUGE. 10 SECONDS AFTER THE SMOKE WAS NOTICED, IT BEGAN POURING OUT RAPIDLY. IMMEDIATELY, WE SHUT OFF THE AVIONICS PWR, BOTH ALTERNATORS AND THE BATTERY/MASTER PWR. WE BEGAN A DSCNT AND TURNED BACK TOWARDS SQL. THE SMOKE STOPPED WITHIN 10 SECONDS. (WE OPTED TO RETURN TO SQL FOR EASE OF MAINT, KNOWING IF CONDITIONS WORSENED WE COULD DIVERT TO HWD). AFTER 3 MINS, WE TURNED THE ELECTRICAL EQUIP BACK ON 1 SWITCH AT A TIME. WE DSNDED TO 2000 FT AND CALLED BAY APCH FOR TRANSITION AND TO ADVISE THEM OF OUR SIT. WE DID NOT DECLARE AN EMER. BAY CLRED US DIRECT TO SQL AND ADVISED SQL TWR WE WERE ENRTE. WE LANDED WITHOUT INCIDENT. I FORGOT TO MENTION EARLIER THAT WE ALSO DEPRESSURIZED THE CABIN DURING DSCNT TO QUICKLY CLR THE SMOKE. THE SOURCE OF THE SMOKE IS BEING INVESTIGATED.
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.