# NTSB MIA87IA081: Enstrom F28C, N8627H, Boca Raton, FL, January 31, 1987

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: January 31, 1987, 15:00 local (20:00 UTC)
- Place: Boca Raton, FL
- Coordinates: 26.339635, -80.079673 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=26.3396&lon=-80.0797&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report July 10, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 31791
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA87IA081
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/31791/pdf
- Page: https://openairdocs.org/ntsb/MIA87IA081

## Sequence of events

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

- Airframe/component/system failure/malfunction, landing
  - rotorcraft flight control,tail rotor control - inadequate (cause)
  - rotorcraft flight control,tail rotor cable - disabled (cause)
- Loss of control - on ground/water, landing
  - directional control - not possible

## Analysis

THE HELICOPTER SPUN UNCONTROLLABLY ON THE GROUND AFTER THE RIGHT ANTI-TORQUE PEDAL CABLE WAS SEVERED WHILE LANDING. EXAMINATION OF THE HELICOPTER REVEALED THAT THE TETER STOP FAILED TO LIMIT THE TRAVEL OF THE TAIL ROTOR SPINDLE ASSY THEREBY REDUCING THE CLEARANCE BETWEEN THE BLADES AND THE CABLE. AFTER CONTACT WITH THE STOP THE BLADES THEN FLEXED, CONTACTED THE CABLE, & DURING ROTATION, SEVERED IT WHERE IT EXITS THE TAIL BOOM ASSY.

## Aircraft

- Registration: N8627H (not matched to a registry record)
- Reported make and model: ENSTROM F28C
- Category: Helicopter
- Serial number: 746
- Airframe hours: 66
- Engines: LYCOMING HIO-360-F1AD 225 horsepower reciprocating
- Damage: Minor damage
- Flight: Personal, Part 91
- Registered owner: Mw Aviation
- Airworthiness certificate: Standard, Normal
- Airport: BCT, Boca Raton

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 45; private; airplane ratings: single-engine sea, multi-engine land, single-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 3,500 total

## Weather

- Conditions: Visual (VMC), Day
- Wind: 310° at 14 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Altimeter: 30.00 inHg
- Observed at: PMP, 8 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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