DEN01LA077

NTSB accident investigation · Bell UH-1H · Zuni, NM · March 25, 2001

Accident · No injuriesLimited investigationFinal report
Date
March 25, 2001, 13:30 local (20:30 UTC)
Place
Zuni, NM
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N56CFBell UH-1H
Weather
Visual (VMC) · Day
Status
Completed · report November 1, 2001
Report
Approved by Office Director
Parties
FAA FSDO
FAA report
20010325005539A
Case key
51975

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

a hard landing due to the pilot's failure to maintain aircraft control during autorotation/flare. A factor was the total loss of engine power due to mechanical failure.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

FireCruise - normal
Turboshaft engine,free(power) turbine - fire
Loss of engine power(total) - mech failure/malfDescent - emergency
Autorotation - initiatedPilot in command
Turbine assembly,seal - failure,totalFactor
Hard landingEmergency landing
Flare - not maintainedPilot in commandCause
Terrain condition - open fieldFactor
Landing gear,skid assembly - collapsedFactor

Analysis

While in cruise flight, the pilot noticed an illuminated master caution light and high engine oil temperature. A few moments later, he received a report from a pilot in a second helicopter telling him that his engine was on fire. The pilot then noticed an engine chip light. He shut down the engine and "initiated an autorotation." The engine seized at approximately 200 feet above ground level (AGL) and the helicopter hit the ground hard. The skids grabbed in the soft dirt and collapsed. The helicopter sustained substantial damage to the skids, bottom of fuselage and fire damage to the engine. The fire extinguished prior to landing. An examination of the engine at a helicopter repair station in Redding, California, identified that the "engine's number three and four bearing pack seal had failed." The failure resulted in "high engine oil temperature, which led to the engine fire and subsequent failure of the engine."

Factual narrative

On March 25, 2001, at approximately 1330 mountain standard time, a Bell UH-1H helicopter, N56CF, was substantially damaged when it collided with the terrain during an emergency landing near Zuni, New Mexico. The commercial pilot and sole occupant was not injured. Visual meteorological conditions prevailed for this ferry flight being conducted under Title 14 CFR Part 91. The flight originated from Double Eagle II Airport, Albuquerque, New Mexico, at approximately 1230.

According to the pilot, he noticed an illuminated master caution light and high engine oil temperature. A few moments later, he received a report from a pilot in a second helicopter telling him that his engine was on fire. The pilot then noticed an engine chip light. He shut down the engine and "initiated an autorotation." The engine seized at approximately 200 feet above ground level (AGL) and the helicopter hit the ground hard. The pilot stated that he "elected to run the A/C on because of the altitude (7,800') and being downwind. The landing worked out fine until the skids grabbed in the soft dirt and collapsed." The helicopter sustained substantial damage to the skids, bottom of fuselage and fire damage to the engine. The fire extinguished prior to landing.

An examination of the engine at a helicopter repair station in Redding, California, identified that the "engine's number three and four bearing pack seal had failed." The failure resulted in "high engine oil temperature, which led to the engine fire and subsequent failure of the engine."

Aircraft

Registration
N56CF
Reported as
Bell UH-1H
Category
Helicopter
Serial number
64-13880
Airframe hours
13,297
Engine
Lycoming T53-13, 1,100 horsepower, turbo shaft
Damage
Substantial damage
Fire
In-Flight
Flight
Ferry · Part 91
Registered owner
Vertol Systems Inc.
Airworthiness certificate
Standard, Utility
Last inspection
100 hour · March 20, 2001 · 6 hours before
Departed
AEG · Albuquerque, NM
Destination
INW · Winslow, AZ

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
49
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Helicopter, Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Last flight review
February 22, 2001
Seat
Front
Flight hours
17,000 total · 13,557 as pilot in command · 173 in the last 90 days · 24 in the last 30 days · 8 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
240° at 15 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
68 °F, dew point 16 °F
Altimeter
30.06 inHg
Observed at
KGUP, 30 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.