# NTSB CHI84LA274: Hughes 269B, N9487F, Eden Prairie, MN, July 3, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 3, 1984, 14:30 local (19:30 UTC)
- Place: Eden Prairie, MN
- Coordinates: 44.909828, -93.290847 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.9098&lon=-93.2908&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 12681
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI84LA274
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/12681/pdf
- Page: https://openairdocs.org/ntsb/CHI84LA274

## Sequence of events

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

- In flight collision with terrain/water, hover
  - cyclic - excessive, dual student (cause)
  - remedial action - not possible, pilot in command(cfi) (contributing factor)
- Roll over, hover

## Analysis

THE CFI STATED THAT WHILE PRACTICING A PEDAL TURN THE STUDENT PILOT SUDDENLY APPLIED BACK CYLIC CAUSING THE TAIL ROTOR TO CONTACT THE GROUND. THE MAIN ROTOR THEN CONTACTED THE GROUND AND THE HELICOPTER ROLLED OVER.

## Aircraft

- Registration: [N9487F](https://openairdocs.org/deregistered/N9487F-2023-01-20), registration cancelled 2023-01-20, S/N 270313, built 1967 (OpenAirDocs)
- Reported make and model: HUGHES 269B
- Registry model: [Hughes 269B](https://openairdocs.org/model/hughes-269b) (registry code 4470502) (OpenAirDocs)
- Registry engine: [Lycoming I0360 series](https://openairdocs.org/engine/lycoming-i0360-series) (registry code 41515, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Serial number: 270313
- Airframe hours: 2219
- Engines: LYCOMING HIO-360-A1A 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Registered owner: Paul Dagnon
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, June 29, 1984, 15 hours before
- Departed: FCM, EDEN PRAIRE, MN
- Airport: FMC, Flying Cloud, runway 36, 2,991 × 75 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 26; commercial, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: right; flight hours: 791 total, 219 in this make and model, 620 as pilot in command, 113 in the last 90 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 350° at 10 knots
- Visibility: 15 statute miles
- Lowest ceiling: 3,000 ft broken
- Altimeter: 29.00 inHg
- Observed at: FCM

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19840703029839A](https://openairdocs.org/incident/19840703029839A), Jul 3, 1984: Hughes 269B, Eden Praire, MN, Substantial damage. Student made a sudden pull back on the cylic causing a tail rotor and main rotor strikes. Helicopter rolled over.

## Other investigations on N9487F (4)

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.

- [NTSB CHI88LA108](https://openairdocs.org/ntsb/CHI88LA108), May 7, 1988: Hughes 269B (N9487F), Minneapolis, MN, substantial damage
- [NTSB MKC75FCD22](https://openairdocs.org/ntsb/MKC75FCD22), Oct 30, 1974: Hughes 269B (N9487F), Waterloo, IA, substantial damage
- [NTSB MKC71DDM18](https://openairdocs.org/ntsb/MKC71DDM18), May 2, 1970: Hughes 269B (N9487F), Crosby, MN, substantial damage
- [NTSB MKC68F0506](https://openairdocs.org/ntsb/MKC68F0506), Mar 28, 1968: Hughes 269B (N9487F), St Paul, MN, substantial damage

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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