NTSB Identification: ATL86FA020.
The docket is stored on NTSB microfiche number 29837.
Accident occurred Thursday, November 07, 1985 in SPARTA, TN
Aircraft: HAWKER SIDDELEY DH 125-400A, registration: N100HF
Injuries: 1 Serious,4 Minor.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

TEN MINUTES PRIOR TO LANDING HEAVY RAIN FELL ON AIRPORT.ACFT MAD NORMAL TOUCHDOWN,SPOILERS & LIFT DUMP ACTIVATED.PIC DELAYED BRAKE APPLICATION AS USUAL AND DID NOT GET THRUST LEVERS IN IDLE.AFTER ACFT PASSED MID-FIELD TAXIWAY PIC REPORTED BRAKES BECAME INEFFECTIVE.ACFT HYDROPLANED ON WATER-COVERED RUNWAY AND OVERRAN DEPARTURE END,DOWN AND EMBANKMENT, & HIT A DITCH.RUNWAY HAD AN OFF CENTER CROWN, GRASS WAS ABOUT TWO FEET TALL AT RUNWAY EDGE, AND A DAM HAD FORMED FROM PREVIOUSLY CUT GRASS WHICH PREVENTED WATER DRAINAGE.AIRPORT MANAGER SAID HE WAS NOT AWARE WATER WOULD STAND ON RUNWAY.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

AIRPORT FACILITIES,RUNWAY/LANDING AREA CONDITION..FOREIGN SUBSTANCE COVERED

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

INFORMATION..NOT IDENTIFIED..AIRPORT PERSONNEL

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

UNSAFE/HAZARDOUS CONDITION WARNING..NOT ISSUED..AIRPORT PERSONNEL

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

TERRAIN CONDITION..WET

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

RUNWAY MAINTENANCE..INADEQUATE..AIRPORT PERSONNEL

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

AIRCRAFT PERFORMANCE,HYDROPLANING CONDITION..WATER

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

BRAKES(NORMAL)..DELAYED..PILOT IN COMMAND





Contributing Factors

LANDING GEAR,TIRE..PRESSURE TOO LOW

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