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An inspector/technician reports a metal cabin air mixture valve housing had chafed through a terminal boot on the 'positive' cable terminal stud at an auxiliary power receptacle creating smoke in the cabin of a navion rangemaster 'G' model aircraft. Pilot had to shut off electrical power with master switch while in controlled airspace.
| Attributes | |
| ACN | 1084684 |
| Time | |
| Date | 201304 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Rangemaster (Navion) |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Cruise |
| Component | |
| Aircraft Component | External Power |
| Person 1 | |
| Function | Inspector Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant Maintenance Inspection Authority |
| Experience | Maintenance Inspector 11 Maintenance Lead Technician 15 Maintenance Technician 25 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Landing Without Clearance Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor Inflight Event / Encounter Other / Unknown |
Narrative:
Cabin air mixture valve housing chafed above terminal boot against 'positive' cable terminal of aux power plug. The path to 'ground' was through actuator cable to instrument panel. Cable subsequently heated up; creating smoke in the cabin from internal lubricants in the cable and a very small area of an adjacent interior side panel. Aircraft in controlled airspace and had to shut-off electrical power; flight continued and landed without further incident at an uncontrolled field. Pilot contacted ATC via landline; no emergency or priority handling by ATC was given.
Original NASA ASRS Text
Title: An Inspector/Technician reports a metal Cabin Air Mixture Valve housing had chafed through a terminal boot on the 'Positive' cable terminal stud at an Auxiliary Power receptacle creating smoke in the cabin of a Navion Rangemaster 'G' model aircraft. Pilot had to shut off electrical power with Master Switch while in controlled airspace.
Narrative: Cabin Air Mixture Valve housing chafed above terminal boot against 'Positive' cable terminal of Aux Power plug. The path to 'Ground' was through actuator cable to instrument panel. Cable subsequently heated up; creating smoke in the cabin from internal lubricants in the cable and a very small area of an adjacent interior side panel. Aircraft in controlled airspace and had to shut-off electrical power; flight continued and landed without further incident at an uncontrolled field. Pilot contacted ATC via landline; no emergency or priority handling by ATC was given.
Data retrieved from NASA's ASRS site as of July 2013 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.