Aircraft Accident/Incident Report

Gurabo
Saturday, January 15, 1994 22:20 AST

NTSB Narrative Summary Released at Completion of Accident

THE PILOT STATED THAT DURING CRUISE FLIGHT DURING A DARK NIGHT OVER UNSUITABLE TERRAIN AT 1,800 FEET MSL, THE CLUTCH LIGHT FLICKERED MOMENTARILY THEN REMAINED ILLUMINATED. HE WAITED FOR 5 SECONDS THEN PULLED THE CLUTCH CIRCUIT BREAKER AND INITIATED AN EMERGENCY DESCENT FOR A FORCED LANDING. WHEN THE FLIGHT WAS ABOUT 50 FEET ABOVE GROUND LEVEL (AGL) THE PILOT INITIATED THE CYCLIC FLARE. THEN WHEN THE FLIGHT WAS ABOUT 10 FEET AGL, HE PULLED COLLECTIVE CONTROL BUT THE HELICOPTER LANDED HARD. EXAMINATION OF THE HELICOPTER REVEALED THAT ONE OF THE TWO VEE- BELTS HAD COMPLETELY SEPARATED AND 1/2 OF THE REMAINING BELT HAD ALSO COMPLETELY SEPARATED. REVIEW OF THE MAINTENANCE RECORDS REVEALED THAT THE TENSION OF THE BELTS WAS CHECKED ABOUT 42 HOURS BEFORE. THE VEE-BELTS WERE INSTALLED WHEN THE HELICOPTER WAS MANUFACTURED ABOUT 442 HOURS BEFORE THE ACCIDENT.

NTSB Probable Cause Narrative

COMPLETE SEPARATION OF ONE OF THE TWO VEE-BELTS, AND COMPLETE SEPARATION OF 1/2 OF THE REMAINING BELT. CONTRIBUTING TO THE ACCIDENT WAS THE DARK NIGHT CONDITION AND UNSUITABLE TERRAIN ENCOUNTERED DURING THE AUTOROTATIVE LANDING.

Event Information

Type of Event Accident
Event Date 1/15/1994
Event Day of the Week Saturday
Time of Event 2220
Event Time Zone Atlantic Standard Time
Event City GURABO
Event State PUERTO RICO
Event Country --
Zipcode of the event site 00778
Event Date Year 1994
Event Date Month 1
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude
Event Location Longitude
Event Location Airport
Event Location Nearest Airport ID
Indicates whether the acc/inc occurred off or on an airport Off Airport/Airstrip
Distance from airport in statute miles --
Degrees magnetic from airport --
Airport Elevation --
Weather Briefing Completeness Unknown
Investigator's weather source Weather Observation Facility
Time of the weather observation 2150 Atlantic Standard Time
Direction of event from weather observation facility (degrees) 5
Weather Observation Facility ID SJU
Elevation of weather observation facility 10
Distance of event from weather observation facility (units?) 11
Time Zone of the weather observation AST
Lighting Conditions Night/Dark
Lowest Ceiling Height 25000
Lowest Non-Ceiling Height 6500
Sky/Lowest/Cloud Conditions Scattered
Sky Condition for Lowest Ceiling Overcast
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 12
Air Temperature at event time (in degrees celsius) 23
Dew Point at event time (in degress fahrenheit) 22
Wind Direction (degrees magnetic) 180
Variable Wind Indicator Unknown
Wind Speed (knots) 3
Wind Velocity Indicator Unknown
Wind Gust Indicator Not Gusting
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) 30
Density Altitude (feet) --
Intensity of Precipitation Unknown
METAR weather report --
Event Highest Injury None
On Ground, Fatal Injuries 0
On Ground, Minor Injuries 0
On Ground, Serious Injuries 0
Injury Total Fatal --
Injury Total Minor --
Injury Total None 1
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 574
NTSB Notification Source --
NTSB Notification Date Jan 16 1994 12:00AM
NTSB Notification Time 1124
Fiche Number and/or location -used to find docket information IMAGE
Date of most recent change to record Dec 6 2000 10:25AM
User who most recently changed record dbo
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N193HC
NTSB Number MIA94LA054
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 None
Aircraft Explosion None
Aircraft Manufacturer's Full Name ROBINSON
Aircraft Model R22B
Aircraft Series Identifier R22B
Aircraft Serial Number 1924
Certified Max Gross Weight 1370
Aircraft Category Helicopter
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 2
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection Annual
Date of Last Inspection Sep 5 1993 12:00AM
Airframe hours since last inspection 27
Airframe Hours 442
ELT Installed No
ELT Activated Unknown
ELT Aided Location of Event Site Unknown
ELT Type --
Aircraft Owner Name INITIATIVE TRADE CORP.
Aircraft Owner Street Address BOX 1052
Aircraft Owner City SABANA SEDA
Aircraft Owner State PR
Aircraft Owner Country
Aircraft Owner Zipcode 00952
Operator is an individual? --
Operator Name
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address
Operator City
Operator State
Operator Country
Operator Zip code
Operator Code
Owner has at least one certificate None
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) Unknown
Second Pilot on Board No
Departure Point Same as Event Yes
Departure Airport Code
Departure City
Departure State
Departure Country
Departure Time 2115
Departure Time Zone AST
Destination Same as Local Flt --
Destination Airport Code SIG
Destination City SAN JUAN
Destination State PR
Destination Country
Specific Phase of Flight Cruise
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Jan 2 2001 10:34AM
User who most recently changed record dbo
Since inspection or accident --
Event Location Runway Number and Location 0
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --