# NTSB BFO92LA049: Robinson R-22B, N133MB, Phillipsburg, OH, March 28, 1992

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: March 28, 1992, 15:15 local (20:15 UTC)
- Place: Phillipsburg, OH
- Coordinates: 39.910457, -84.399658 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=39.9105&lon=-84.3997&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor, 1 uninjured
- Status: Completed, report June 11, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 11777
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=BFO92LA049
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/11777/pdf
- Page: https://openairdocs.org/ntsb/BFO92LA049

## Probable cause

THE LOSS OF CONTROL DUE TO INADEQUATE ROTOR RPM.

## Sequence of events

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

- Loss of control - in flight, maneuvering - turn to reverse direction
  - rotor rpm - improper, pilot in command (contributing factor)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

THE PILOT WAS GIVING A DEMONSTRATION FLIGHT TO THE PASSENGER.  HE DID AN APPROACH TO AN OPEN FIELD NEXT TO RUNWAY 3 AND HE ENDED THE APPROACH WITH A QUICK STOP.  THE PILOT THEN HOVERED THE HELICOPTER AND TURNED IT 180 DEGREES.  SHORTLY AFTER HE TURNED, THE PILOT NOTICED THE MAIN ROTOR RPM WAS TOO LOW.  HE WAS UNABLE TO INCREASE ROTOR RPM AND THE HELICOPTER DESCENDED AND IMPACTED THE GROUND.  THE HELICOPTER CAME TO REST ON ITS RIGHT SIDE.  THE PILOT REPORTED NO MECHANICAL MALFUNCTION.

## Aircraft

- Registration: [N133MB](https://openairdocs.org/deregistered/N133MB-1994-02-07), registration cancelled 1994-02-07, S/N 1133 (OpenAirDocs)
- Reported make and model: ROBINSON R-22B
- Registry model: [Robinson Helicopter R22 BETA](https://openairdocs.org/model/robinson-helicopter-r22-beta) (registry code 7640110) (OpenAirDocs)
- Category: Helicopter
- Serial number: 1133
- Airframe hours: 1943
- Engines: LYCOMING O-320 160 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 91
- Operator: M.G. Helicopters, Inc
- Registered owner: M.G. Helicopters, Inc
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, March 10, 1992, 1 hours before
- Departed: 930H, MILLERSBURG HP, OH
- Airport: 3I7, Phillipsburg

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 34; flight instructor, commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 1,575 total, 478 in this make and model, 1,385 as pilot in command, 49 in the last 90 days, 49 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 10° at 7 knots
- Visibility: 10 statute miles
- Lowest ceiling: 25,000 ft broken
- Temperature: 48 °F, dew point -0 °F
- Altimeter: 30.00 inHg
- Observed at: DAY, 15 nm away

## 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 19920328007679A](https://openairdocs.org/incident/19920328007679A), Mar 28, 1992: Robsin R22BETA, Phillipsburg, OH, Substantial damage. Giving passenger demo of quick stop manuever and 180 pedal turn. Lost rotor RPM. Impacted slide landing and rolled

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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