NTSB Identification: SEA90FA091.
The docket is stored on NTSB microfiche number 42500.
Accident occurred Saturday, June 02, 1990 in TACOMA, WA
Probable Cause Approval Date: 11/09/1992
Aircraft: CESSNA 172K, registration: N79931
Injuries: 1 Fatal.

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 A VFR FLIGHT, THE FLIGHTS INTENDED DESTINATION WAS REPORTING IFR CONDITINS. THE PILOT OPTED TO DIVERT TO ANOTHER AIRPORT THAT WAS REPORTING VFR. DURING THE DESCENT FOR LANDING ON FINAL APPROACH, THE AIRPLANE COLLIDED WITH TREES. POST CRASH INVESTIGATION DID NOT REVEAL ANY MECHANICAL FAILURES OR MALFUNCTIONS. THE COCKPIT INTRUMENT PANEL WAS DESTROYED DURING THE IMPACT SEQUENCE. THE FACE OF THE ALTIMETER, HOWEVER, WAS RETRIEVED. THE BAROMETRIC PRESSURE WINDOW DISPLAYED A SETTING OF 30.10 IN HG. THE LAST SETTING AIR TRAFFIC GAVE TO THE PILOT JUST PRIOR TO ACCIDENT WAS 30.02 IN HG, A DIFFERENCE OF .08 IN OR 80 FEET WHICH WOULD HAVE INDICATED THAT THE AIRPLANE WAS 80 FEET HIGHER THAN ITS ACTUAL ALTITUDE ABOVE GROUND LEVEL.

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

THE PILOT DID NOT ADEQUATELY MAINTAIN A PROPER GLIDE PATH FOR LANDING WHICH RESULTED IN AN INFLIGHT COLLISION WITH A TREE.

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