ATL88LA190

NTSB accident investigation · Sikorsky S-55C · Coaling, AL · June 7, 1988

Accident · Minor injuriesLimited investigationFinal report
Date
June 6, 1988, 19:45 local (Jun 7, 1988, 00:45 UTC)
Place
Coaling, AL
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N883Sikorsky S-55C
Weather
Visual (VMC) · Day
Status
Completed · report October 3, 1989
Report
Approved by Office Director
Case key
7772

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

On this page

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.

Loss of control - in flightApproach - vfr pattern - final approach
Rotorcraft flight control,tail rotor control - loss,totalCause
Rotor system,tail rotor hub pitch link - looseCause
Maintenance,major repair - improperCompany/operator managementCause
Hard landingDescent - emergency

Analysis

The helo was approaching a helipad for landing after the last aerial application flight of the day when there was a pop and tail rotor control was lost. After several rotations about the vertical axis, the PIC landed the helo hard, collapsing the landing gear. The pic/owner said the tail rotor pitch change link bolt and nut were absent. There was no other damage to the tail rotor. The pic/owner said he had changed the tail rotor hub and the pitch change links during the winter, about 50 flight hours prior to the accident.

Aircraft

Registration
N883
Reported as
Sikorsky S-55C
Category
Helicopter
Serial number
551015
Engine
Wright R-1300-D, 800 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Morris, Roy L.
Registered owner
Roy L Morris
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · April 6, 1988 · 50 hours before
Airport
Helicopter Pad

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
58
Certificates
Commercial, Private
Airplane ratings
Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Right
Flight hours
14,350 total · 600 in this make and model · 100 in the last 90 days · 50 in the last 30 days · 10 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
7 statute miles
Lowest ceiling
25,000 ft broken
Temperature
84 °F, dew point 57 °F
Altimeter
29.00 inHg
Observed at
TCL, 8 nm away