Dominicci Airport
Aircraft Accident/Incident Report

Dorado
Thursday, October 31, 1996 3:30 AST

NTSB Narrative Summary Released at Completion of Accident

After takeoff from runway 9, a climbing left turn was made. At about 1,000 feet, the #2 (right) engine backfired, emitted flames, & lost power. The captain instructed the copilot to feather the #2 propeller, which the copilot initiated with the feathering button. When the captain requested gear & flap extension, the copilot released the feathering button which did not remain engaged, contrary to system design. The airplane had arrived on a left downwind abeam the landing area at 500 feet & 95 to 100 kts. The captain turned toward the runway, then he ordered the gear & flaps to be retracted & initiated a go-around by increasing the left throttle without increasing propeller speed. A right turn was then made, & the airplane eventually crashed about 3 miles from the runway. During a postaccident examination, the propellers were found unfeathered, & the right engine fuel selector was in the main tank position. The emergency procedure listed the best single engine speed as 85 kts. The procedure for engine fire/failure was to feather the propeller & to move the respective fuel selector to 'OFF.' Examination revealed the number 11 cylinder on the right engine was cracked. There was evidence of fire, adjacent to the cylinder on the cowling, which consisted of scorching, sooting, & a burned through area of the underside of the right engine cowling. The copilot indicated a previous problem with the feathering system, but maintenance records did not contain any previous discrepancies regarding this anomaly.

NTSB Probable Cause Narrative

failure of the #11 cylinder on the right (#2) engine, which resulted in an in-flight fire and loss of power in that engine; and a malfunction/failure of the #2 feathering system, which led to a subsequent forced landing before the flight crew could return to the airport. A factor related to the accident was failure of the flight crew to increase the left (#1) engine rpm (in accordance with emergency procedures) after loss of power in the #2 engine.

Event Information

Type of Event Accident
Event Date 10/31/1996
Event Day of the Week Thursday
Time of Event 330
Event Time Zone Atlantic Standard Time
Event City DORADO
Event State PUERTO RICO
Event Country --
Zipcode of the event site 00936
Event Date Year 1996
Event Date Month 10
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude
Event Location Longitude
Event Location Airport DOMINICCI
Event Location Nearest Airport ID SIG
Indicates whether the acc/inc occurred off or on an airport Off Airport/Airstrip
Distance from airport in statute miles 4
Degrees magnetic from airport 260
Airport Elevation 10
Weather Briefing Completeness Unknown
Investigator's weather source Weather Observation Facility
Time of the weather observation 458 Atlantic Standard Time
Direction of event from weather observation facility (degrees) 280
Weather Observation Facility ID SJU
Elevation of weather observation facility 10
Distance of event from weather observation facility (units?) 10
Time Zone of the weather observation AST
Lighting Conditions Night/Bright
Lowest Ceiling Height 0
Lowest Non-Ceiling Height 0
Sky/Lowest/Cloud Conditions Clear
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 10
Air Temperature at event time (in degrees celsius) 23
Dew Point at event time (in degress fahrenheit) 23
Wind Direction (degrees magnetic) 0
Variable Wind Indicator Unknown
Wind Speed (knots) 0
Wind Velocity Indicator Calm
Wind Gust Indicator Not Gusting
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) 29
Density Altitude (feet) --
Intensity of Precipitation Unknown
METAR weather report --
Event Highest Injury Serious
On Ground, Fatal Injuries 0
On Ground, Minor Injuries 0
On Ground, Serious Injuries 0
Injury Total Fatal --
Injury Total Minor 1
Injury Total None --
Injury Total Serious 2
Injury Total All 3
Investigating Agency NTSB
NTSB Docket Number (internal use) 1575
NTSB Notification Source --
NTSB Notification Date Oct 31 1996 12:00AM
NTSB Notification Time 558
Fiche Number and/or location -used to find docket information IMAGE
Date of most recent change to record Dec 8 2000 10:24AM
User who most recently changed record dbo
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N37AP
NTSB Number ATL97LA012
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? --
Damage Substantial
Aircraft Fire In-flight
Aircraft Explosion None
Aircraft Manufacturer's Full Name Douglas
Aircraft Model C-47
Aircraft Series Identifier C-47
Aircraft Serial Number 4430
Certified Max Gross Weight 26000
Aircraft Category Airplane
Aircraft Registration Class U.S. Registered/U.S. Soil
Aircraft is a homebuilt? No
Flight Crew Seats --
Cabin Crew Seats --
Passenger Seats --
Total number of seats on the aircraft 3
Number of Engines 2
Fixed gear or retractable gear Retractable
Aircraft, Type of Last Inspection AAIP
Date of Last Inspection Oct 28 1996 12:00AM
Airframe hours since last inspection 7
Airframe Hours 16179
ELT Installed Yes
ELT Activated Yes
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name AIR CHARTER, INC
Aircraft Owner Street Address POST OFFICE BOX 1208
Aircraft Owner City TRUJILLO ALTO
Aircraft Owner State PR
Aircraft Owner Country
Aircraft Owner Zipcode 00760
Operator is an individual? --
Operator Name FLAMENCO AIRWAYS, INC
Operator Same as Owner? No
Operator Is Doing Business As --
Operator Address Same as Owner? No
Operator Street Address POST OFFICE BOX 224
Operator City CULEBRA
Operator State PR
Operator Country
Operator Zip code 00755
Operator Code FLMA
Owner has at least one certificate Yes - certificate holder
Other Operator of large aircraft? No
Certified for Part 133 or 137 Operation Unknown
Operator Certificate Number --
Indicates whether an air carrier operation was scheduled or not --
Indicates Domestic or International Flight --
Operator carrying Pax/Cargo/Mail --
Type of Flying (Per_Bus / Primary) Positioning
Second Pilot on Board Yes
Departure Point Same as Event No
Departure Airport Code SIG
Departure City SAN JUAN
Departure State PR
Departure Country
Departure Time 330
Departure Time Zone AST
Destination Same as Local Flt dest & departure same, accident can occur anywhere
Destination Airport Code SJU
Destination City
Destination State PR
Destination Country
Specific Phase of Flight Emergency landing
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Jan 2 2001 10:30AM
User who most recently changed record dbo
Since inspection or accident --
Event Location Runway Number and Location 27
Runway Length 4820
Runway Width 100
Sight Seeing flight No
Air Medical Flight No
Medical Flight --