Air carrier mdt rolls forward and hits ground power unit after engine start.

Attributes
ACN	304989
Time
Date	199505
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ord
State Reference	IL
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	ground : preflight
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi pilot : instrument pilot : commercial
Experience	flight time last 90 days : 200 flight time total : 2600 flight time type : 40
ASRS Report	304989
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical conflict : ground critical non adherence : published procedure other anomaly other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Consequence	other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

After completing before starting engines checklist, as called for by the captain, the engine(south) starts were accomplished again as per the checklist. I then began my duties of computing weight and balance and the desired bug speeds. In my peripheral vision, I saw the captain advance the condition levers to bring the propellers out of feather. As the RPM spooled up, I sensed the aircraft began to roll forward. I yelled 'we're moving,' at which time we fully depressed the toe brakes. However, in this aircraft, there is no hydraulic power at low RPM settings. Consequently the aircraft rolled forward enough to strike a ground power unit, tearing a hole on the outer right forward lower side, below the first officer's window. The parking brake had not been set, which was called out by me, the captain confirmed it was set. As per our flight manual, the captain sets and releases our parking brake.

Original NASA ASRS Text

Title: ACR MDT ROLLS FORWARD AND HITS GND PWR UNIT AFTER ENG START.

Narrative: AFTER COMPLETING BEFORE STARTING ENGS CHKLIST, AS CALLED FOR BY THE CAPT, THE ENG(S) STARTS WERE ACCOMPLISHED AGAIN AS PER THE CHKLIST. I THEN BEGAN MY DUTIES OF COMPUTING WT AND BAL AND THE DESIRED BUG SPDS. IN MY PERIPHERAL VISION, I SAW THE CAPT ADVANCE THE CONDITION LEVERS TO BRING THE PROPS OUT OF FEATHER. AS THE RPM SPOOLED UP, I SENSED THE ACFT BEGAN TO ROLL FORWARD. I YELLED 'WE'RE MOVING,' AT WHICH TIME WE FULLY DEPRESSED THE TOE BRAKES. HOWEVER, IN THIS ACFT, THERE IS NO HYD PWR AT LOW RPM SETTINGS. CONSEQUENTLY THE ACFT ROLLED FORWARD ENOUGH TO STRIKE A GND PWR UNIT, TEARING A HOLE ON THE OUTER R FORWARD LOWER SIDE, BELOW THE FO'S WINDOW. THE PARKING BRAKE HAD NOT BEEN SET, WHICH WAS CALLED OUT BY ME, THE CAPT CONFIRMED IT WAS SET. AS PER OUR FLT MANUAL, THE CAPT SETS AND RELEASES OUR PARKING BRAKE.

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.