# Incident 19980609030389I: Aerosp AS355F1, Gulf Mexico, LA, June 9, 1998

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: June 9, 1998, 10:15 local time
- Place: Gulf Mexico, LA
- Damage: Minor damage
- Phase of flight: Pwr On Vertical Ldng/Rtrcrft
- Operating rules: Air taxi and commuter (Part 135)
- Operator: ALGA
- Aircraft: N5775H, a cancelled registration (https://openairdocs.org/deregistered/N5775H-2002-02-19) (OpenAirDocs)
- Registry model: Aerospatiale AS 355 F ECUREUIL (registry code 8680806, https://openairdocs.org/model/aerospatiale-as-355-f-ecureuil) (OpenAirDocs)
- Registry engine: Allison 250 SER 250HP (registry code 03002, https://openairdocs.org/engine/allison-250-ser-250hp) (OpenAirDocs)
- Reported make and model: AEROSP AS355F1
- People aboard: 1
- Fatal injuries: 0
- Pilot flight hours: 1,602 total, 361 in this make and model, 90 in the last 90 days
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19980609030389I

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

ON JUNE 9, 1998, AT 1015 CENTRAL DAYLIGHT TIME (CDT), AN AEROSPATIALE, AS-355-F1, HELICOPTER, N5775H, OWNED AND OPERATED BY AIR LOGISTICS L.L.C. EXPERIENCED A SEVERE VIBRATION ON TOUCHDOWN AT AN OFFSHORE OIL PLATFORM. SUBSEQUENT INVESTIGATION REVEALED SUSPECTED DIVERGENT DYNAMIC EXCITATION (GROUND RESONANCE) TO HAVE OCCURRED. HELICOPTER WAS INSPECTED FOR CAUSAL MECHANICAL ANOMALIES PER AEROSPATIALE BULLETIN 01.14A ALTHOUGH WEAR WAS NOTED ON THE MGB SUSPENSION, IT WAS WITHIN MANUFACTURERS TOLERANCES. VISUAL METEOROLOGICAL CONDITIONS PREVAILED AT THE TIME AND COMPANY FLIGHT FOLLOWING PROCEDURES WERE IN EFFECT. THE COMMERCIALLY RATED PILOT WAS NOT INJURED. THERE WERE NO PASSENGERS ON BOARD. THE FLIGHT ORIGINATED AT HIGH ISLAND BLOCK 264A, GULF OF MEXICO, ON JUNE 9, 1998, AT 1010 CDT.

## Other reports on N5775H (2)

Matched to the same aircraft by N-number and date.

- [Incident 19901211063839I](https://openairdocs.org/incident/19901211063839I), Dec 11, 1990: Aerosp AS355F (N5775H), Houma, LA. NR1 engine power loss. Landed safely. Rotary actuator had electrically failed internally.
- [Incident 19900612034639I](https://openairdocs.org/incident/19900612034639I), Jun 12, 1990: Aerosp AS355F (N5775H), Houma, LA. NR1 engine failure. Single engine landing at destination. Spur adapter shaft had sheared.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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