NTSB Identification: ANC83FA080.
The docket is stored on NTSB microfiche number 21314.
Nonscheduled 14 CFR
Accident occurred Saturday, May 21, 1983 in KING SALMON, AK
Aircraft: CURTISS-WRIGHT C-46F, registration: N1822M
Injuries: 2 Uninjured.

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 COPLT REPORTED THAT THE ACFT HAD BEEN IN LEVEL CRUISE FLT APRX 1 MIN WHEN THEY FELT A VIBRATION, FOLLOWED BY A LOUD BANG. THE AIRCREW SAW FIRE & SMOKE COMING FROM THE LEFT ENG, SO THEY SHUT DOWN THE ENG & FEATHERED THE PROPELLER. THE PLT ALSO ACTIVATED THE FIRE WALL CUTOFF SYS & THE FIRE EXTINGUISHER, WHICH HE SAID, EXTINGUISHED THE FIRE. THE AIRCREW DIVERTED BACK TO THE DEPARTURE AIRPORT, BUT WHEN THEY TRIED TO EXTEND THE GEAR, THE LEFT MAIN FAILED TO EXTEND & THE RIGHT MAIN ONLY PARTIALLY EXTENDED. THE RIGHT MAIN COULD NOT BE RETRACTED, SO THE ACFT WAS LANDED WITH THE GEAR IN THAT POSITION. AFTER A CRASH LANDING, AIR FORCE CRASH/RESCUE PERSONNEL EXTINGUISHED AN ON-GOING FIRE IN THE LEFT ENG. AN INVESTIGATION REVEALED THAT THE #8 CYLINDER, PN 113149, HAD FAILED. SUBSEQUENTLY; FIRE HAD BURNT THE HYDRAULIC OPERATED COWL FLAPS & HYDRAULIC FLUID WAS PUMPED OVERBOARD. THE MANUAL/HYDRAULICALLY OPERATED GEAR UPLOCKS ON THE RIGHT MAIN GEAR OPERATED, BUT HYDRAULIC FLUID IN THE RESERVOIR BECAME DEPLETED.

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

ENGINE ASSEMBLY,CYLINDER..FAILURE,TOTAL


Contributing Factors

PERFORMED..PILOT IN COMMAND


Contributing Factors

FIRE EXTINGUISHING EQUIPMENT..SELECTED..PILOT IN COMMAND


Contributing Factors

HYDRAULIC SYSTEM..BURNED


Contributing Factors

WHEELS UP LANDING..PERFORMED..PILOT IN COMMAND


Contributing Factors

PROPELLER FEATHERING..PERFORMED..PILOT IN COMMAND


Contributing Factors

HYDRAULIC SYSTEM..LEAK


Contributing Factors

FLUID,HYDRAULIC..EXHAUSTION


Contributing Factors

LANDING GEAR..INOPERATIVE

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