# NTSB FTW86LRD07: MBB BO-105-CBS, N425EH, Lake Charles, LA, February 20, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: February 20, 1986, 16:15 local (22:15 UTC)
- Place: Lake Charles, LA
- Location: 30.1261° N, 93.2234° W: Placed by OpenAirDocs at LAKE CHARLES RGNL (LCH), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=30.1261&lon=-93.2234&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 22133
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW86LRD07
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/22133/pdf
- Page: https://openairdocs.org/ntsb/FTW86LRD07

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Hard landing, landing - flare/touchdown
  - flare - misjudged, dual student (cause)
  - aircraft performance,landing capability - exceeded (cause)
  - design stress limits of aircraft - exceeded, dual student (cause)
  - landing gear,main gear attachment - distorted
  - emergency procedure - simulated, pilot in command(cfi)
  - remedial action - misjudged, pilot in command(cfi) (cause)

## Analysis

THE HELICOPTER WAS SIMULATING A SINGLE ENG LANDING ON AN AREA MARKED TO THE SIZE OF AN OFFSHORE HELIDECK. THE ACFT TOUCHED DOWN HARD ENOUGH TO ATTRACT THE ATTENTION OF SEVERAL WITNESSES. THE CREW CONTINUED WITH THE TRAINING BUT LATER ON POST FLT EXAM THEY DISCOVERED STRUCTURAL DAMAGE HAD BEEN DONE TO THE STRINGERS AND SKIN NEAR THE LNDG SKID ATTACH POINTS.

## Aircraft

- Registration: [N425EH](https://openairdocs.org/deregistered/N425EH-1995-04-12), registration cancelled 1995-04-12, S/N S551 (OpenAirDocs)
- Reported make and model: MBB BO-105-CBS
- Registry model: [Messerschmitt-Boelkow-Blohm-Gm BO-105C](https://openairdocs.org/model/messerschmitt-boelkow-blohm-gm-bo-105c) (registry code 5626005) (OpenAirDocs)
- Category: Helicopter
- Serial number: 551
- Airframe hours: 3331
- Engines: ALLISON C-20B 420 horsepower turbo shaft
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Registered owner: Era Helicopters, Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: AAIP, January 10, 1986, 85 hours before
- Departed: LCH
- Flight plan: Company VFR
- Airport: LCH, Lake Charles

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 39; airline transport, commercial; airplane ratings: single-engine land; instrument ratings: airplane, helicopter; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 7,979 total, 1,000 in this make and model, 7,593 as pilot in command, 3 in the last 30 days, 9 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 170° at 9 knots
- Visibility: 5 statute miles
- Lowest ceiling: 1,600 ft overcast
- Temperature: 72 °F, dew point 63 °F
- Altimeter: 29.00 inHg
- Observed at: LCH, 1 nm away

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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