NTSB Identification: MIA86MA217.
The docket is stored on NTSB microfiche number 31927.
Nonscheduled 14 CFR
Accident occurred Tuesday, July 22, 1986 in ISLA VERDE
Aircraft: DOUGLAS DC-3, registration: N27PR
Injuries: 1 Fatal,1 Serious.

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

SHORTLY AFTER TAKEOFF, THE ACFT'S CLIMB PERFORMANCE BGN TO DETERIORATE & THE R ENG STARTED TO OVERHEAT. SUBSEQUENTLY, THE R ENG WAS FEATHERED & THE CREW ATTEMPTED TO RETURN TO THE ARPT. THE RADIO TRANSMITTER BCM UNINTELLIGIBLE, SO THE TOWER PSNL CLEARED THE ACFT TO LAND ON RWY 10 & ASKED THE CREW TO KEY THEIR MIKE TWICE, IF THEY UNDERSTOOD. THE MIKE WASKEYED TWICE. THE ACFT ENTERED A R DWNWND FOR RWY 10 AT A VERY LOW ALT. ACCORDING TO WITNESSES, THE ACFT WENT INTO A STEEP BANK AS IT WAS TURNING ONTO A BASE LEG OVER WATER, THE R WING TIP HIT THE WATER & THE ACFT CARTWHEELED & CRASHED. THE COPLT RPRTD THAT AFTER FEATHERING THE R ENG, THE VMC OF 84 KTS WAS MAINTAINED; HOWEVER, HE BELIEVED THE ACFT STALLEDJUST PRIOR TO IMPACT. A TEARDOWN OF THE R ENG REVEALED THE EDGE OF THE #8 PISTON & ITS PISTON RINGS HAD FAILED. METAL FILINGS WERE FOUND IN THE OIL & THE OIL PUMP WAS SCORED. THERE WAS EVIDENCE OF OIL STARVATION TO THE CRANKSHAFT JOURNAL,AS WELL AS PISTON SLAP ASSOCIATED WITH THE RING FAILURE.

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

AIRSPEED..INADEQUATE..PILOT IN COMMAND

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

AIRCRAFT HANDLING..IMPROPER..PILOT IN COMMAND


Contributing Factors

TERRAIN CONDITION..WATER,ROUGH


Contributing Factors

COMM/NAV EQUIPMENT,TRANSMITTER..FAILURE,TOTAL



Contributing Factors

ENGINE ASSEMBLY,RING..FAILURE,TOTAL


Contributing Factors

ENGINE ASSEMBLY,BEARING..FAILURE,TOTAL


Contributing Factors

ENGINE ASSEMBLY,MASTER ROD..FAILURE,TOTAL


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