ATR42 hits CPU after engine start up. Ground incident. Aircraft maintenance discrepancy.

Attributes
ACN	309171
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
Controlling Facilities	tower : tus
Operator	common carrier : air carrier
Make Model Name	ATR 42
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	ground : parked ground : preflight
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : cfi pilot : atp
Experience	flight time last 90 days : 100 flight time total : 8000 flight time type : 160
ASRS Report	309171
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical non adherence : published procedure other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	other Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

After start-up propeller levers were advanced, aircraft rolled forward and struck gpu. All checklists performed, yet parking brake lever was not in park position when aircraft rolled. Further investigation found brake lever cam broken (piece which holds parking brake in parked position). Parking brake cam should be checked regularly by maintenance or crews!

Original NASA ASRS Text

Title: ATR42 HITS CPU AFTER ENG START UP. GND INCIDENT. ACFT MAINT DISCREPANCY.

Narrative: AFTER START-UP PROP LEVERS WERE ADVANCED, ACFT ROLLED FORWARD AND STRUCK GPU. ALL CHKLISTS PERFORMED, YET PARKING BRAKE LEVER WAS NOT IN PARK POS WHEN ACFT ROLLED. FURTHER INVESTIGATION FOUND BRAKE LEVER CAM BROKEN (PIECE WHICH HOLDS PARKING BRAKE IN PARKED POS). PARKING BRAKE CAM SHOULD BE CHKED REGULARLY BY MAINT OR CREWS!

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.