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NTSB Report

May 16, 2001 · Parker Rotorway 162F · N311RM

Minneapolis, MN

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
May 16, 2001
Injury Outcomes
No injuries (1 uninjured)
Location
Minneapolis, MN
Aircraft
Parker Rotorway 162F
Tail Number
N311RM
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CHI01LA141

The student pilot said that he was returning to Rogers, Minnesota, when he heard a "pop" and then the helicopter yawed left. The student pilot said that he lost pedal control and entered a turning autorotation. He said that at approximately 35 feet above the ground, he introduced some aft cyclic in an attempt to perform a run on landing. He said that the helicopter "spun violently to [the] right". The student pilot said he added full left [control pedal] and down cyclic. The helicopter dropped to the ground. An examination of the helicopter's belt drive system revealed that the lower shaft bearing in the secondary drive unit to the tail rotor was loose and the tail rotor drive belt had come off.

NTSB Probable Cause

The tail rotor drive belt coming off in cruise flight and it not being possible for the student pilot to maintain aircraft control during the emergency landing attempt. Factors relating to the accident were the loose bearing in the secondary drive unit to the tail rotor, the attempted autorotation and run on landing by the student pilot, and the low altitude.

Full Narrative

On May 16, 2001, at 1110 central daylight time, a Parker Rotorway 162F helicopter, N311RM, operated by a student pilot, sustained substantial damage when it impacted into a field 15 miles northwest of Minneapolis, Minnesota, during an emergency landing. Prior to the emergency landing attempt, the helicopter experienced a tail rotor malfunction. Visual meteorological conditions prevailed at the time of the accident. The personal flight was being conducted under the provisions of 14 CFR Part 91. There was no flight plan on file. The student pilot operating the helicopter reported no injuries. The local flight originated from the pilot's residence at Rogers, Minnesota, at 1045. In his written statement, the student pilot said that he was returning to Rogers, Minnesota, when he heard a "pop" and then the helicopter yawed left. The student pilot said that he lost pedal control and entered a turning autorotation. He said that at approximately 35 feet above the ground, he introduced some aft cyclic in an attempt to perform a run on landing. He said that the helicopter "spun violently to [the] right". The student pilot said he added full left [control pedal] and down cyclic. The helicopter dropped to the ground. A Federal Aviation Administration inspector examined the helicopter at the student pilot's residence. The inspector observed that both skids were collapsed, the tail boom was bent upward, the bottom vertical stabilizer was crushed upward, and the tail rotor was bent aft. Control continuity was confirmed. An examination of the helicopter's belt drive system revealed that the lower shaft bearing in the secondary drive unit to the tail rotor was loose and the tail rotor drive belt had come off.

Flight

Event TypeAccident
Event Time11:10 CDT
Nearest Airport0nm
Flight Plan FiledNone
Flight Plan ActivatedNo

Aircraft

AircraftParker Rotorway 162F
Tail NumberN311RM
Aircraft CategoryHeli
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsRotorway · 162 · Reciprocating · 150
Seats2

People & Injuries

Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 47 · Third Class · None

Conditions

ConditionsVMC
LightDaylight
Wind300° @ 8 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point46
Altimeter29.70 inHg
Observation Time15:53
Weather SourceWFAC

Appendix: Source Data