A C650 flight crew experiences a runway excursion when they fail to stop on a wet runway at lnk, nor...

Attributes
ACN	399941
Time
Date	199804
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lnk
State Reference	NE
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : corporate
Make Model Name	Citation III, VI, VII
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	landing other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time total : 16300
ASRS Report	399941
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 96 flight time total : 6653 flight time type : 72
ASRS Report	399852
Events
Anomaly	inflight encounter : weather non adherence other other anomaly other anomaly other other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Consequence	Other
Supplementary
Primary Problem	Weather
Air Traffic Incident	Pilot Deviation other

Narrative:

The approach was in light rain that ended on short final. The runway was wet from a previous shower. I landed approximately 1500 ft down the runway. I tested the brakes, they were ok. I deployed thrust reversers, spoilers, and I increased the braking pressure. Nearing the last taxiway, the aircraft was decelerating normally until the aircraft rolled on the painted threshold markings at which time the deceleration rate of aircraft stopped. Later we could see from the tire tracks that there was very little rubber on the painted areas as compared with unpainted surface. Preventive measures: 1) mix sand with paint to increase the braking friction on painted surfaces. 2) use maximum thrust reversers for full effectiveness. 3) use maximum brakes for minimum stopping distance. 4) land on first 1000 ft of runway. Supplemental information from acn 399852: the PIC was unable to stop on the hard surface and continued off the runway a few ft and stopped. Several factors contributed to this occurrence. 1) the wet runway surface. 2) the weight of the aircraft (minimum required fuel and no passenger) reducing braking effectiveness. 3) the possibility of hydroplaning the tires. 4) wet painted surfaces on the runway (threshold markings and numbering for runway 17L) that further decreased braking effectiveness at the end of runway 35R. To correct this occurrence a more aggressive use of reverse thrust upon touchdown and decelerating more rapidly to low speed using reverse thrust, before reaching the runway end.

Original NASA ASRS Text

Title: A C650 FLC EXPERIENCES A RWY EXCURSION WHEN THEY FAIL TO STOP ON A WET RWY AT LNK, NE. SCENARIO DEPICTS LATE DEPLOYMENT OF SPOILERS AND THRUST REVERSERS.

Narrative: THE APCH WAS IN LIGHT RAIN THAT ENDED ON SHORT FINAL. THE RWY WAS WET FROM A PREVIOUS SHOWER. I LANDED APPROX 1500 FT DOWN THE RWY. I TESTED THE BRAKES, THEY WERE OK. I DEPLOYED THRUST REVERSERS, SPOILERS, AND I INCREASED THE BRAKING PRESSURE. NEARING THE LAST TXWY, THE ACFT WAS DECELERATING NORMALLY UNTIL THE ACFT ROLLED ON THE PAINTED THRESHOLD MARKINGS AT WHICH TIME THE DECELERATION RATE OF ACFT STOPPED. LATER WE COULD SEE FROM THE TIRE TRACKS THAT THERE WAS VERY LITTLE RUBBER ON THE PAINTED AREAS AS COMPARED WITH UNPAINTED SURFACE. PREVENTIVE MEASURES: 1) MIX SAND WITH PAINT TO INCREASE THE BRAKING FRICTION ON PAINTED SURFACES. 2) USE MAX THRUST REVERSERS FOR FULL EFFECTIVENESS. 3) USE MAX BRAKES FOR MINIMUM STOPPING DISTANCE. 4) LAND ON FIRST 1000 FT OF RWY. SUPPLEMENTAL INFO FROM ACN 399852: THE PIC WAS UNABLE TO STOP ON THE HARD SURFACE AND CONTINUED OFF THE RWY A FEW FT AND STOPPED. SEVERAL FACTORS CONTRIBUTED TO THIS OCCURRENCE. 1) THE WET RWY SURFACE. 2) THE WT OF THE ACFT (MINIMUM REQUIRED FUEL AND NO PAX) REDUCING BRAKING EFFECTIVENESS. 3) THE POSSIBILITY OF HYDROPLANING THE TIRES. 4) WET PAINTED SURFACES ON THE RWY (THRESHOLD MARKINGS AND NUMBERING FOR RWY 17L) THAT FURTHER DECREASED BRAKING EFFECTIVENESS AT THE END OF RWY 35R. TO CORRECT THIS OCCURRENCE A MORE AGGRESSIVE USE OF REVERSE THRUST UPON TOUCHDOWN AND DECELERATING MORE RAPIDLY TO LOW SPD USING REVERSE THRUST, BEFORE REACHING THE RWY END.

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.

A C650 flight crew experiences a runway excursion when they fail to stop on a wet runway at lnk, northeast. Scenario depicts late deployment of spoilers and thrust reversers.