Plane Crash List

Aerospatiale AS-355F-1 N5796T

18 June 1986 · Galveston, Texas, United States · No injuries

Summary

On 18 June 1986 at about 15:55 local time, a Aerospatiale AS-355F-1 registered N5796T was involved in an accident near Galveston, Texas, United States. One person was on board and nobody was injured. The aircraft was substantially damaged. No probable cause statement is available for this record.

The record

Date
at 15:55
Classification
Accident
Location
Galveston, Texas, United States
Nearest airport
High Island 571 Platform
Coordinates
29.3006, -94.7896
Aircraft
Aerospatiale AS-355F-1
Registration
N5796T
Category
Helicopter
Engines
1
Operator
Not recorded
Operating rule
Part 91: General Aviation
Purpose of flight
Positioning
Phase of flight
Not recorded
Route
High Island 571 → Unknown
Aircraft damage
Substantial
Weather
VMC
Light
Day
NTSB number
LAX86MA268

People

Nobody was injured.

On board Died Serious Minor Uninjured
1 0 0 0 1

Probable cause

The NTSB has not published a probable cause for this record. No probable cause statement is present in the source data.

Nothing about the cause is stated here that is not in the source record.

Read the full NTSB narrative

THE PLT RPRTD THAT WHILE APCHG AN OIL DRILLING PLATFORM FOR A LNDG, HE OBSERVED THE MAIN ROTOR BLADES GO OUT OF TRACK ABOUT 8 TO 10 INCHES. HE ALSO RPRTD THE HELICOPTER DEVELOPED A 1:1 VERTICAL VIBRATION. DRG THE LNDG, THE HELICOPTER ENTERED INTO GROUND RESONANCE & THE PLT IMMEDIATELY SHUT DOWN BOTH ENGINES. AN EXAM OF THE HELICOPTER REVEALED THE LEFT FORWARD TRANSMISSION SUPPORT BAR (TSB) WAS BUCKLED & CRACKED AT MIDSPAN. A METALLURGICAL EXAM OF THE FRACTURE AREA ON THE TSB REVEALED EXTENSIVE, LOW CYCLE, HIGH AMPLITUDE, FATIGUE CRACKING. THERE WAS EVIDENCE THAT THE PROPAGATION TIME OFTHE FATIGUE OCCURRED OVR ABOUT 5 HRS OF OPN. THE INV DID NOT REVEAL WHEN THE ORIGINAL BUCKLING OF THE TSB OCCURRED. NO HISTORY OF A PREV HARD LNDG OR GND REASONANCE WAS FND. ALSO, THE RED ARM OF THE STARFLEX HAD FAILED; AN EXAM INDCD IT HAD RUPTURED EITHER UNDER STATIC LOADS, OR VERY RAPIDLY UNDER HI DYNAMIC LOADS. WHEN TESTED, EXTN & RETRACTION TIMES OF LNDG GEAR DAMPERS WERE 8.34 TO 10.38 SEC; AFTER ACDNT, TIME LMTS ESTABLISHED AT 6 TO 13 SEC, PREVIOUSLY 11.1 TO 13.1 SEC

Quoted verbatim from the NTSB record.

Other Aerospatiale AS-355F accidents

Date Aircraft Location Operator Outcome Died
31 May 1986 Aerospatiale AS-355F-1
N909CH
Kameula, Hawaii, United States Hemmeter Aviation, Inc. Minor injuries -
18 Jul 1986 Aerospatiale AS-355F-1
N57967
Morgan City, Louisiana, United States Mobil Oil Corp. No injuries -
4 Feb 1985 Aerospatiale AS 355F-1
N5796A
Sabine Pass, Texas, United States - No injuries -
4 Aug 1985 Aerospatiale AS-355F
N299FE
Chamblee, Georgia, United States - Serious injuries -
19 Aug 1987 Aerospatiale AS-355F-1
N359E
Ship Shoal 214C
no coordinates
- Serious injuries -
4 Jan 1984 Aerospatiale AS-355F
N5792X
Morgan City, Louisiana, United States - Fatal 2

All 13 records for this type

Other accidents in this area

Date Aircraft Location Operator Outcome Died
17 Aug 1986 Cessna U206F
N147ED
Matagorda Is., Texas, United States Systems Plumbing, Inc. Minor injuries -
20 Aug 1986 Hughes 369-500D
N4493M
Fort Stockton, Texas, United States William O. Bowers No injuries -
25 Aug 1986 Cessna 172A
N7261T
Gainesville, Texas, United States Michael D. Allison No injuries -
29 Aug 1986 Boeing A75N1
N7711J
Addison, Texas, United States - No injuries -
1 Sep 1986 Boeing A75N1
N44WR
Laporte, Texas, United States - No injuries -
2 Sep 1986 Boeing E75
N4563N
Sweetwater, Texas, United States - No injuries -

All 170,864 records in United States