Light transport propeller hits ground power unit in ramp operation aircraft parking procedure.

Attributes
ACN	215552
Time
Date	199207
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sbn
State Reference	IN
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : csg
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	ground : parked ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 240 flight time total : 6400 flight time type : 4000
ASRS Report	215552
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 250 flight time total : 4993 flight time type : 1986
ASRS Report	215914
Events
Anomaly	conflict : ground critical non adherence other other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Taxied to gate after normal landing. I followed the marshaller's instructions and stopped the aircraft upon his command. I set the parking brake (1 click) then reached and looked up to the overhead panel to complete the shutdown checklist. The first officer's left hand was over the avionics master switches to prevent me from turning them off, because the cabin briefer was still operating (I was not aware of the cabin briefer still running). I looked at him, waiting for him to turn off the avionics master. Then I heard the noise of the left propeller striking the ground power unit. I immediately dropped my hand to the power levers, pulled them into reverse, grabbed the parking brake, pulled it (it came up 1 click) then pressed the engine stop buttons. I also pushed on the toe brakes as I started this reverse, brake stop button sequence. There was no sensation of motion forward or stopping after I initially set the parking brake. Supplemental information from acn 215914: one problem was the ground power unit was in the aircraft safe area prior to shutdown. In the future, prepositioning of ground equipment in the vicinity of aircraft should not be allowed.

Original NASA ASRS Text

Title: LTT PROP HITS GND PWR UNIT IN RAMP OP ACFT PARKING PROC.

Narrative: TAXIED TO GATE AFTER NORMAL LNDG. I FOLLOWED THE MARSHALLER'S INSTRUCTIONS AND STOPPED THE ACFT UPON HIS COMMAND. I SET THE PARKING BRAKE (1 CLICK) THEN REACHED AND LOOKED UP TO THE OVERHEAD PANEL TO COMPLETE THE SHUTDOWN CHKLIST. THE FO'S L HAND WAS OVER THE AVIONICS MASTER SWITCHES TO PREVENT ME FROM TURNING THEM OFF, BECAUSE THE CABIN BRIEFER WAS STILL OPERATING (I WAS NOT AWARE OF THE CABIN BRIEFER STILL RUNNING). I LOOKED AT HIM, WAITING FOR HIM TO TURN OFF THE AVIONICS MASTER. THEN I HEARD THE NOISE OF THE L PROP STRIKING THE GND PWR UNIT. I IMMEDIATELY DROPPED MY HAND TO THE PWR LEVERS, PULLED THEM INTO REVERSE, GRABBED THE PARKING BRAKE, PULLED IT (IT CAME UP 1 CLICK) THEN PRESSED THE ENG STOP BUTTONS. I ALSO PUSHED ON THE TOE BRAKES AS I STARTED THIS REVERSE, BRAKE STOP BUTTON SEQUENCE. THERE WAS NO SENSATION OF MOTION FORWARD OR STOPPING AFTER I INITIALLY SET THE PARKING BRAKE. SUPPLEMENTAL INFO FROM ACN 215914: ONE PROBLEM WAS THE GND PWR UNIT WAS IN THE ACFT SAFE AREA PRIOR TO SHUTDOWN. IN THE FUTURE, PREPOSITIONING OF GND EQUIP IN THE VICINITY OF ACFT SHOULD NOT BE ALLOWED.

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.