An air carrier mdt crew lost all electrical power on taxi in, including its batteries.

Attributes
ACN	233506
Time
Date	199302
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ewr
State Reference	NJ
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : yyz
Operator	common carrier : air carrier
Make Model Name	Medium Transport
Flight Phase	ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : atp pilot : cfi pilot : commercial pilot : instrument
Experience	flight time last 90 days : 100 flight time total : 5200 flight time type : 200
ASRS Report	233506
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

During taxi in, #1 engine was shut down to conserve fuel. Upon doing so, all electrical power, including batteries, was lost. This left the aircraft without any radios or gyroscopes (including the standby horizon). All attempts to reset circuit breakers, restart engine, obtain emergency power, etc, were futile. Note: the APU was inoperative on MEL. With no radio communication possible, the aircraft was escorted to the gate with assistance from port authority of ny/nj. The aircraft was handed over to maintenance for repair. We were very fortunate that this situation occurred on the ground in day VFR. Had this happened during takeoff in night heavy IFR, the results could be disastrous. In an airplane there should never be a situation in which this can occur. I believe it is a design flaw and should be investigated further and we have stated this to our company.

Original NASA ASRS Text

Title: AN ACR MDT CREW LOST ALL ELECTRICAL PWR ON TAXI IN, INCLUDING ITS BATTERIES.

Narrative: DURING TAXI IN, #1 ENG WAS SHUT DOWN TO CONSERVE FUEL. UPON DOING SO, ALL ELECTRICAL PWR, INCLUDING BATTERIES, WAS LOST. THIS LEFT THE ACFT WITHOUT ANY RADIOS OR GYROSCOPES (INCLUDING THE STANDBY HORIZON). ALL ATTEMPTS TO RESET CIRCUIT BREAKERS, RESTART ENG, OBTAIN EMER PWR, ETC, WERE FUTILE. NOTE: THE APU WAS INOP ON MEL. WITH NO RADIO COM POSSIBLE, THE ACFT WAS ESCORTED TO THE GATE WITH ASSISTANCE FROM PORT AUTHORITY OF NY/NJ. THE ACFT WAS HANDED OVER TO MAINT FOR REPAIR. WE WERE VERY FORTUNATE THAT THIS SIT OCCURRED ON THE GND IN DAY VFR. HAD THIS HAPPENED DURING TKOF IN NIGHT HVY IFR, THE RESULTS COULD BE DISASTROUS. IN AN AIRPLANE THERE SHOULD NEVER BE A SIT IN WHICH THIS CAN OCCUR. I BELIEVE IT IS A DESIGN FLAW AND SHOULD BE INVESTIGATED FURTHER AND WE HAVE STATED THIS TO OUR COMPANY.

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.