FTW87FA059

NTSB accident investigation · Sikorsky S-76A · Angleton, TX · February 5, 1987

Accident · FatalField investigationFinal report
Date
February 4, 1987, 20:00 local (Feb 5, 1987, 02:00 UTC)
Place
Angleton, TX
Injuries
2 fatal
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N767ALSikorsky S-76A
Weather
Instrument (IMC) · Night/dark
Status
Completed · report October 25, 1988
Report
Approved by Office Director
FAA report
19870204001699A
Case key
22231

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

In flight encounter with weatherClimb
Weather condition - low ceilingFactor
Weather condition - fogFactor
Weather condition - haze/smokeFactor
Vfr flight into imc - inadvertentPilot in commandCause
Loss of control - in flightApproach - iaf to faf/outer marker (ifr)
Initiated
Approach charts - unavailableFactor
Preflight planning/preparation - inadequatePilot in commandFactor
Information - dispatchedCompany/operator management
Planned approach - attemptedPilot in command
Aircraft handling - not maintainedPilot in commandCause
Spatial disorientationPilot in commandCause
Airframe/component/system failure/malfunctionDescent - uncontrolled
Design stress limits of aircraft - exceededPilot in commandCause
Rotor system,main rotor blade - cracked
Rotor system,main rotor blade - overload
Rotor system,main rotor blade - separation
In flight collision with terrain/waterDescent - uncontrolled

Analysis

Shortly after tkof, the plt contacted his company (opns) & said he had inadvertently enctrd IFR conds. He asked opns to relay info to him fm the apch plate for the ILS rwy 17 apch to brazoria county arpt. After rcvg the info, he contacted houston apch ctl & asked for the ILS. Vectors were provided & he was clrd for the ILS; however, he was unable to get established on the apch. Three atmts were made with the last being a no-gyro apch. Drg this time, simultaneous radio contact was maintd with apch ctl & opns. His gnd speed varied fm 106 to 28 KTS. Just bfr the acdnt, he said, '. . . I'vegot an altitude problem,' then after a short delay, he stated '. . . I am going to crash.' The wreckage was fnd aprx 1 mi nw of the outer marker, scattered ovr a 2445' area. There was evidence the main rotor blades had hit the tail boom & radome & sepd in flt. One blade had a preexisting crack, but blue paint matching the tail boom was fnd on the blade. THE1950 CDT wx at galveston (32 mi ene), was in part: 400' ovc, 3 mi vis with fog & haze, wind fm 080 deg at 18KTS.

Aircraft

Registration
N767AL
Reported as
Sikorsky S-76A
Category
Helicopter
Serial number
760030
Airframe hours
5,589
Engine
Allison 250-C30S, 650 horsepower, turbo shaft
Damage
Destroyed
Fire
On-Ground
Flight
Other work use · Part 91
Operator
Air Logistics,Inc.
Registered owner
First Security Bank Of Utah
Airworthiness certificate
Standard, Normal
Last inspection
Annual · January 26, 1987 · 6 hours before
Departed
TA86 · Freeport, TX
Destination
LBX · Angleton, TX
Flight plan
IFR
Airport
LBX · Brazoria County, runway 17, 6,000 × 100 ft, asphalt

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
50
Certificates
Airline transport, Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Helicopter, Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Right
Toxicology
Performed
Flight hours
6,468 total · 1,245 in this make and model · 6,468 as pilot in command

Weather

Conditions
Instrument (IMC) · Night/dark
Wind
80° at 18 knots
Visibility
3 statute miles
Lowest ceiling
400 ft overcast
Temperature
57 °F, dew point 54 °F
Altimeter
30.00 inHg
Observed at
GLS, 32 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.