NTSB Identification: LAX85FA076.
The docket is stored on NTSB microfiche number 26937.
Accident occurred Sunday, December 16, 1984 in MAMMOTH LAKES, CA
Aircraft: PIPER PA-60-601P, registration: N601FP
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.

THE ACFT TOOKOFF FROM AN ARPT WHOSE RWYS HAD BEEN CLOSED FOR SNOW REMOVAL. A NOTAM HAD BEEN FILED WITH THE FRESNO FSS BY THE MAMMOTH LAKE ARPT MGR AT 0900 HRS FOR TAXI AND RWY SNOW REMOVAL. THE PLT WAS AWARE OF THE NOTAM BECAUSE THE MGR AND A LINEMAN BOTH SAID THEY ADVISED HIM OF IT. SEVERAL WITNESSES SAW THE PLT ENTER THE ACFT AFTER DECLINING ENG PRE-HEAT OR ACFT DE-ICING. WHEN ADVISED BY THE LINEMAN THAT THE 2 QTS OF OIL THAT THE PLT REQUESTED DID NOT 'REGISTER ONTHE DIP-STICK.' THE PLT ORDERED ANOTHER QT TO BE 'THROWN' IN & 'HURRY UP.' NO PRE-FLT OR WARM UP OR BEFORE TAKEOFF CHECK WAS NOTED BY OBSERVERS. TURNING IMMEDIATELY ONTO THE RWY AND ROLLING FOR TAKEOFF THE PLT PASSED A SNOW PLOW. THE ACFT USED 7000 FT (ALL OF THE RWY) AND LEFT THE GROUND IN A NOSE HIGH ATTITUDE. THE ARPT ELEVATION IS 7128 FT MSL. THE ACFT FIRST STRUCK A DIRT MOUND 3/4 OF A MILE AFTER TAKEOFF. AFTER MAINTAINING FURTHER FLT FOR APRX 280 FT WHICH CROSSED A SMALL RAVINE THE ACFT COLLIDED WITH THE FAR SIDE OF THE RAVINE & STARTED TO BREAK APART, STOPPING 144 FT FURTHER EAST.

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

PREFLIGHT PLANNING/PREPARATION..IMPROPER..PILOT IN COMMAND

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

ICE/FROST REMOVAL FROM AIRCRAFT..INADEQUATE..PILOT IN COMMAND

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

AIRPORT SNOW REMOVAL..NOT IDENTIFIED..PILOT IN COMMAND

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

PROPER CLIMB RATE..NOT POSSIBLE..PILOT IN COMMAND

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

CHECKLIST..IMPROPER..PILOT IN COMMAND

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

JUDGMENT..POOR..PILOT IN COMMAND

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

NOTAMS..DISREGARDED..PILOT IN COMMAND

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

ROTATION..DELAYED..PILOT IN COMMAND

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

STALL/MUSH..NOT UNDERSTOOD..PILOT IN COMMAND


Contributing Factors

NOTAMS..ISSUED..AIRPORT PERSONNEL


Contributing Factors

WING..ICE


Contributing Factors

MISC EQPT/FURNISHINGS,SHOULDER HARNESS..NOT ENGAGED


Contributing Factors

AIRCRAFT PERFORMANCE,CLIMB CAPABILITY..DISABLED

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