NTSB Identification: SEA85FA056.
The docket is stored on NTSB microfiche number 27336.
Nonscheduled 14 CFR
Accident occurred Saturday, February 09, 1985 in CENTRAL POINT, OR
Aircraft: Gulfstream AC-680F, registration: N233W
Injuries: 4 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 PLT REPORTED A LOSS OF POWER ON BOTH ENGS DURING DESCENT TO LAND. APRX 3 MINS PRIOR, TWR GAVE PLT OPTION OF 'STRAIGHT-IN' TO RWY 14 OR REG PATTERN TO RWY 32. THE PLT HESITATED & SAID 'JUST A MINUTE' & TWR OFFERED WIND INFO AS '210 AT 13.' PLT REPLIED, 'KAY.' APRX 1 MIN LATER PLT SAID '33W WILL MAKE A LEFT BASE FOR 14.' TWR CLEARED HIM & DECLARED VISUAL CONTACT. PLT ACKNOWLEDGED '3WHISKEY.' ONE MIN & 54 SECS LATER, PLT DECLARED PWR LOSS & EMERG. TWR ROGERED. SEVEN SECS LATER, PLT SAID 'GONNA HIT IT' FOLLOWED 2 SECS LATER WITH AN UNITELLIGIBLE COMMENT. WITNESSES SAW THE ACFT GLIDING WINGS LVL TOWARD RWY WHEN A LOUD 'REV' WAS HEARD, THE ACFT PITCHED UP & ROLLED LEFT TO AN INVERTED POSITION BEFORE GROUND CONTACT & EXPLOSION. POST ACCIDENT INVESTIGATION DID NOT DISCLOSE ANY ENG OR FUEL SYSTEM MALFUNCTION. THIS ACFT HAD EXPERIENCED A PWR LOSS AFTER DESCENDING FROM 15500 TO 12000 FT MSL ON 2/2/85 WITH THE SAME PLT AS REPORTED BY THE CO-PLT ON THAT FLT. AFTER APRX 1 1/2 MINUTES PWR WAS RESTORED.

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:

EMERGENCY PROCEDURE..MISJUDGED..PILOT IN COMMAND

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

AIRSPEED(VMC)..NOT MAINTAINED..PILOT IN COMMAND

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

DIRECTIONAL CONTROL..NOT MAINTAINED..PILOT IN COMMAND

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

PERFORMANCE DATA..NOT UNDERSTOOD..PILOT IN COMMAND

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

REMEDIAL ACTION..NOT UNDERSTOOD..PILOT IN COMMAND

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

THROTTLE/POWER CONTROL..NOT CORRECTED..PILOT IN COMMAND

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

MANEUVER..UNCONTROLLED..PILOT IN COMMAND

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

IMPROPER USE OF EQUIPMENT/AIRCRAFT..PILOT IN COMMAND



Contributing Factors

ANXIETY/APPREHENSION..PILOT IN COMMAND


Contributing Factors

ACFT/EQUIP,INADEQUATE AIRCRAFT MANUALS..MANUFACTURER


Contributing Factors

FUEL SYSTEM..UNDETERMINED

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