NTSB Identification: ATL87LA149.
The docket is stored on NTSB microfiche number 34095.
Accident occurred Monday, May 25, 1987 in DAHLONEGA, GA
Probable Cause Approval Date: 08/31/1988
Aircraft: CESSNA 150M, registration: N704YK
Injuries: 2 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE ACFT IMPACTED TREES AND A HILLSIDE SHORTLY AFTER A NIGHT TAKEOFF FROM RWY 33 WHILE THE CFI WAS FLYING THE ACFT FROM THE RT SEAT. THE CFI REPORTED THAT HE INTENDED TO FLY THE PATTERN TO DEMONSTRATE A LDG TO HIS STUDENT. DURING INITIAL CLIMB, HE LOST SIGHT OF THE TERRAIN AHEAD OF THE ACFT AND SUBSEQUENTLY FLEW A HDG OF 300 DEGREES USING THE DG. THE ACFT SUBSEQUENTLY HIT TREES AND CAME TO REST NOSE-DOWN ON A HILL ABOUT 1/2 MILE DUE NORTH OF THE ARPT. THE CFI REPORTED THAT HE KNEW THE DG HAD A TENDENCY TO PRECESS EXCESSIVELY AND THAT HE HAD RESET IT PRIOR TO TAKEOFF. POST-CRASH TESTING OF THE DG REVEALED THAT IT FAILED TO OPERATE WITHIN MFR SPECS. TOTAL REPORTED OPERATING TIME ON THE UNIT SINCE NEW WAS 1460 HRS. THE ARPT WAS OBSERVED TO BE EQUIPPED WITH LIGHTS ALONG ONLY THE FIRST 1000 FT OF THE RWY. THE CFI REPORTED THAT IT WAS ACCEPTED LOCAL PRACTICE TO DEPART ONLY ON RWY 15 AT NIGHT DUE TO THE LACK OF VISUAL CUES IN THE HILLY TERRAIN TO THE NORTH OF THE ARPT.

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

WRONG RUNWAY..SELECTED..PILOT IN COMMAND(CFI)

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

VISUAL LOOKOUT..NOT POSSIBLE..PILOT IN COMMAND(CFI)

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

OPERATION WITH KNOWN DEFICIENCIES IN EQUIPMENT..ATTEMPTED..PILOT IN COMMAND(CFI)

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

DIRECTIONAL CONTROL..NOT MAINTAINED..PILOT IN COMMAND(CFI)

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

SPATIAL DISORIENTATION..PILOT IN COMMAND(CFI)




Contributing Factors

LIGHT CONDITION..DARK NIGHT


Contributing Factors

FLIGHT/NAV INSTRUMENTS,DIRECTIONAL GYRO..UNMARKED


Contributing Factors

FLIGHT/NAV INSTRUMENTS,DIRECTIONAL GYRO..FALSE INDICATION

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