NTSB Identification: DEN86MA241.
The docket is stored on NTSB microfiche number 33067.
Nonscheduled 14 CFR
Accident occurred Thursday, August 28, 1986 in LANDER, WY
Probable Cause Approval Date: 03/07/1988
Aircraft: CESSNA 441, registration: N2727A
Injuries: 7 Fatal.

NTSB investigators traveled in support of this investigation and used data obtained from various sources to prepare this aircraft accident report.

ON 5/1/86, THE PLT HAD AN ACOUSTIC TUMOR REMOVED FM HIS RGT EAR WHICH INCLUDED THE REMOVAL OF THE 8TH NERVE (BALANCE NERVE). HIS ATTENDING PHYSICIAN SUGGESTED APRX A 1 YR PERIOD OF RECUPERATION DUE TO EQUILIBRIUM PROBLEMS ASSOCIATED WITH THIS TYPE OF SURGERY. ON 7/12/86, HE HAD A 1ST CLASS MEDICAL EXAM & RECEIVED A MEDICAL CERTIFICATE WHICH WAS VALID FOR FLT TEST ONLY. ON 8/28/86, WHILE TAKING OFF AT NGT, THE ACFT COLLIDED WITH RISING TERRAIN APRX 1.5 MI FM THE END OF THE RWY AT AN ELEV OF ABOUT 5600'. THE ARPT ELEV WAS 5586'. A WITNESS STATED THAT HE SAW THE ACFT TAKEOFF, BUT IT DID NOT CLIMB AFTER TAKEOFF. AN INVESTIGATION REVEALED THAT THE ACDNT OCCURRED IN AN AREA THAT WAS ISOLATED FM GND LGTS. A POST CRASH EXAM REVEALED NO EVIDENCE OF A MECHANICAL FAILURE OR MALFUNCTION OF THE ACFT STRUCTURE, FLT CONTROLS, ENG OR PROPELLERS. ACCORDING TO THE PLT'S LOG BOOK, HIS LAST NGT FLT WAS ON 3/22/85. HE HAD BEEN ON DUTY FOR APRX 14 HRS WHEN THE ACDNT OCCURRED.

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

PROCEDURES/DIRECTIVES..NOT FOLLOWED..PILOT IN COMMAND

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

PHYSICAL IMPAIRMENT..PILOT IN COMMAND

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

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

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

SPATIAL DISORIENTATION..PILOT IN COMMAND

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

CLEARANCE..NOT MAINTAINED..PILOT IN COMMAND


Contributing Factors

QUALIFICATION..PILOT IN COMMAND


Contributing Factors

LACK OF RECENT EXPERIENCE IN TYPE OPERATION..PILOT IN COMMAND


Contributing Factors

LIGHT CONDITION..DARK NIGHT


Contributing Factors

FATIGUE..PILOT IN COMMAND


Contributing Factors

VISUAL/AURAL PERCEPTION..PILOT IN COMMAND


Contributing Factors

TERRAIN CONDITION..MOUNTAINOUS/HILLY

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