<< >> NASA ASRS Report 1153530, February 2014

B737 flight crew reports a loud banging noise and electrical fumes as ground power is connected to the aircraft at the gate. Ground power is quickly disconnected and the aircraft is taken out of service for maintenance.

Attributes
ACN	1153530
Time
Date	201402
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Flight Phase	Parked
Component
Aircraft Component	External Power
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 200 Flight Crew Total 15000 Flight Crew Type 3500
Person 2
Function	Pilot Not Flying First Officer
Experience	Flight Crew Last 90 Days 205 Flight Crew Total 10980 Flight Crew Type 3275
Events
Anomaly	Aircraft Equipment Problem Less Severe Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor Ground Event / Encounter Other / Unknown

Narrative:

While deplaning at the gate; ramp personal plugged external power into the aircraft. Pilots heard a loud banging noise and followed by a burnt electrical smell. The first officer and I both opened our windows to evaluate the situation. I told ramp to immediately disconnect the external power. He replied it is already disconnected. I noticed a maintenance technician already waiting at the gate; when we arrived. He immediately inspected aircraft. Pilots later noticed some smoke enter flight deck; either through first officer's open window or right side floor panels. Maintenance opened east and east compartment and reported no fire. I confirmed no fire with maintenance and verbally with mechanic. I made a log book write up and aircraft was removed from service.

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Original NASA ASRS Text

Title: B737 flight crew reports a loud banging noise and electrical fumes as ground power is connected to the aircraft at the gate. Ground power is quickly disconnected and the aircraft is taken out of service for maintenance.

Narrative: While deplaning at the gate; ramp personal plugged external power into the aircraft. Pilots heard a loud banging noise and followed by a burnt electrical smell. The First Officer and I both opened our windows to evaluate the situation. I told ramp to immediately disconnect the external power. He replied it is already disconnected. I noticed a Maintenance Technician already waiting at the gate; when we arrived. He immediately inspected aircraft. Pilots later noticed some smoke enter flight deck; either through First Officer's open window or right side floor panels. Maintenance opened E and E compartment and reported no fire. I confirmed no fire with Maintenance and verbally with Mechanic. I made a log book write up and aircraft was removed from service.

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.