NTSB Identification: CHI84FA148.
The docket is stored on NTSB microfiche number 24551.
Accident occurred Wednesday, April 04, 1984 in PONTIAC, MI
Aircraft: PIPER AEROSTAR 600, registration: N3645T
Injuries: 1 Uninjured.

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.

DURING AN ILS APCH, THE ACFT COLLIDED WITH TREETOPS WHILE IT WAS SLIGHTLY LEFT OF THE APCH COURSE NEAR THE MIDDLE MARKER. THE PLT CONTINUED TO FLY THE ACFT TO THE RWY & THE PLANE TOUCHED DOWN ABOUT 1000 FT BEYOND THE THRESHOLD. AT TOUCHDOWN, THE ACFT VEERED TO THE RIGHT & SKIDDED TO A STOP BETWEEN THE RWY & A TAXIWAY. AN EXAM REVEALED THAT THE LEADING EDGES OF THE WINGS & THE RIGHT MAIN GEAR WERE DAMAGED DURING IMPACT WITH THE TREES. SCRAPE MARKS WERE FOUND ON THE TREAD OF THE RIGHT MAIN TIRE WHICH SHOWED THAT IT HAD SKIDDED ABOUT 90 DEG TO THE PLANE OF ROTATION AS IF IT HAD BEEN COCKED AT TOUCHDOWN. THE PLT STATED THAT SHE WAS CHASING THE NEEDLE DEFLECTION WHILE ON THE ILS APCH & WAS NOT PROPERLY OBSERVING THE ALTIMETER WHEN THE ACFT HIT THE TREES. THE DECISION HEIGHT FOR THE ILS APCH WAS 1180 FT MSL. THE ARPT ELEVATION WAS 980 FT MSL.

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

IFR PROCEDURE..IMPROPER..PILOT IN COMMAND

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

DECISION HEIGHT..NOT IDENTIFIED..PILOT IN COMMAND


Contributing Factors

WEATHER CONDITION..LOW CEILING




Contributing Factors

WEATHER CONDITION..FOG


Contributing Factors

WEATHER CONDITION..RAIN


Contributing Factors

WEATHER CONDITION..BELOW APPROACH/LANDING MINIMUMS


Contributing Factors

OBJECT..TREE(S)

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