Propeller strike on tug by sms in ramp operation aircraft parking procedure.

Attributes
ACN	228270
Time
Date	199212
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ggg
State Reference	TX
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Small Aircraft
Flight Phase	ground other : taxi
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : student
Experience	flight time last 90 days : 34 flight time total : 34 flight time type : 26
ASRS Report	228270
Person 2
Affiliation	Other
Function	other personnel other personnel other
Qualification	other other : other
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	other
Miss Distance	horizontal : 0 vertical : 0
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Taxi to park across apron under lineman's direction. Upon his request for right hand pivot, the right brake would not respond. This aircraft has a free casting nose wheel. Throttle was at idle and speed was minimal. Approximately 20 ft at my 12 O'clock, tug parked. Immediately upon brake failure, I pulled mixture to cutoff. Began working my left brake enough to slow but not to pivot due to lack of clearance (would have struck the tug with right wing). Ground roll continued and struck tug. Propeller still in motion but had wind milled down. This plane's right brake drags. It is possible that it heated and caused failure. The right disc was very hot to the touch even though the brake was not used before this failure. Left brake was cool. Upon landing, the tower requested a quick taxi so as to clear the runway for following traffic. My taxi route required no right turns, therefore the right brake was never used.

Original NASA ASRS Text

Title: PROP STRIKE ON TUG BY SMS IN RAMP OP ACFT PARKING PROC.

Narrative: TAXI TO PARK ACROSS APRON UNDER LINEMAN'S DIRECTION. UPON HIS REQUEST FOR R HAND PIVOT, THE R BRAKE WOULD NOT RESPOND. THIS ACFT HAS A FREE CASTING NOSE WHEEL. THROTTLE WAS AT IDLE AND SPD WAS MINIMAL. APPROX 20 FT AT MY 12 O'CLOCK, TUG PARKED. IMMEDIATELY UPON BRAKE FAILURE, I PULLED MIXTURE TO CUTOFF. BEGAN WORKING MY L BRAKE ENOUGH TO SLOW BUT NOT TO PIVOT DUE TO LACK OF CLRNC (WOULD HAVE STRUCK THE TUG WITH R WING). GND ROLL CONTINUED AND STRUCK TUG. PROP STILL IN MOTION BUT HAD WIND MILLED DOWN. THIS PLANE'S R BRAKE DRAGS. IT IS POSSIBLE THAT IT HEATED AND CAUSED FAILURE. THE R DISC WAS VERY HOT TO THE TOUCH EVEN THOUGH THE BRAKE WAS NOT USED BEFORE THIS FAILURE. L BRAKE WAS COOL. UPON LNDG, THE TWR REQUESTED A QUICK TAXI SO AS TO CLR THE RWY FOR FOLLOWING TFC. MY TAXI RTE REQUIRED NO R TURNS, THEREFORE THE R BRAKE WAS NEVER USED.

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.