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SA227 pilot and dispatcher reported the flight returned to departure airport after noticing smoke in the cockpit that was later traced to boxes placed near bleed heat vents.
| Attributes | |
| ACN | 1309503 |
| Time | |
| Date | 201511 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.TRACON |
| State Reference | UT |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | SA-227 AC Metro III |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | Dispatcher |
| Qualification | Dispatch Dispatcher |
| Events | |
| Anomaly | Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor |
Narrative:
Climbing out of [departure airport at] 14;000 feet. Notice a smell of smoke; started looking around feeling circuit board panels. Then smoke started to fill the cockpit just enough to see it. It did not smell like gas or exhaust more like paper burning. I was unable to hear approach climbing out moments early on the number two radio and had to switch to number one. So immediately though it was smoke coming from the avionics so I turned the avionic master off. No change after a minute; more smoke in the cockpit; looking out the copilot's window is hazy. Turned avionic master back on; contacted center that I would like to cancel IFR and return to departure airport. Once descending and direct [departure airport] troubleshot more; turning heat off and bleed valves. Contacted dispatch; advised situation and coordinated where to park. 8;000 feet direct runway 17. Smoke has now dissipated and cockpit clear; advised tower no more smoke. Landed runway 17. While unloading discovered 3 boxes; one styrofoam two cardboard on the floor next to bleed heat vents. Scorching [observed] on the labels of the two cardboard and on the side of the styrofoam box. No other defects found.keep styrofoam and labels from direct contact with bleed air heat vents and [do] not turn bleed air heat to max heat.
Original NASA ASRS Text
Title: SA227 pilot and dispatcher reported the flight returned to departure airport after noticing smoke in the cockpit that was later traced to boxes placed near bleed heat vents.
Narrative: Climbing out of [departure airport at] 14;000 feet. Notice a smell of smoke; started looking around feeling circuit board panels. Then smoke started to fill the cockpit just enough to see it. It did not smell like gas or exhaust more like paper burning. I was unable to hear Approach climbing out moments early on the number two radio and had to switch to number one. So immediately though it was smoke coming from the avionics so I turned the avionic master off. No change after a minute; more smoke in the cockpit; looking out the copilot's window is hazy. Turned avionic master back on; contacted Center that I would like to cancel IFR and return to departure airport. Once descending and direct [departure airport] troubleshot more; turning heat off and bleed valves. Contacted Dispatch; advised situation and coordinated where to park. 8;000 feet direct Runway 17. Smoke has now dissipated and cockpit clear; advised Tower no more smoke. Landed Runway 17. While unloading discovered 3 boxes; one Styrofoam two cardboard on the floor next to bleed heat vents. Scorching [observed] on the labels of the two cardboard and on the side of the styrofoam box. No other defects found.Keep styrofoam and labels from direct contact with bleed air heat vents and [do] not turn bleed air heat to max heat.
Data retrieved from NASA's ASRS site 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.