ANC90LA189

NTSB accident investigation · Maule M-4-210C · 60 E Of Bethel, AK · October 1, 1990

Accident · FatalLimited investigationFinal report
Date
September 30, 1990, 21:23 local (Oct 1, 1990, 05:23 UTC)
Place
60 E Of Bethel, AK
Injuries
1 fatal
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N51441Maule M-4-210C
Weather
Instrument (IMC) · Night/dark
Status
Completed · report September 11, 1992
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19900930046859A
Case key
5467

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

Continued VFR flight by the pilot into instrument meteorological conditions (IMC), and his failure to maintain altitude and clearance above mountainous terrain. Factors related to the accident were: darkness, adverse terrain and weather conditions, the pilot's lack of instrument experience, and the pilot becoming lost or disoriented.

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.

In flight encounter with weatherCruise - normal
Light condition - dark nightFactor
Terrain condition - high terrainFactor
Weather condition - cloudsFactor
Weather condition - low ceilingFactor
Weather condition - fogFactor
Vfr flight into imc - continuedPilot in commandCause
Lack of total instrument timePilot in commandFactor
In flight collision with terrain/waterManeuvering
Became lost/disoriented - inadvertentPilot in commandFactor
Df steer - not attained
Terrain condition - mountainous/hillyFactor
Proper altitude - not maintainedPilot in commandCause

Analysis

Bfr flt fm anchorage to bethel, AK, non-inst rated plt was adzd that VFR flt wasn't rcmdd. En route, he conversed with mcgrath fss while vfr-on-top & indcd he would dscnd thru hole in clds to lnd/refuel at lime, AK. At 1948 adt, he rprtd en route again, 150 mi east of bethel. At 2054, plt ctcd bethel fss for tfc & wx adzy & rprtd 40 mi east in 'a little bit of fog.' Abt 10 min ltr, he said he was getting disoriented, reqd assistance, then rprtd '60 mi out.' He indcd he couldn't see to set transponder to 7700 (at ngt). At 2106, he rprtd at 6000' & asked abt fcst cig & 'how hi can I go to get up out of this if I get some reference.' Rdo ctc was lost for abt 12 min, then plt said he was at 3700' & still 58 mi fm bethel. No df strobe or radar info was obtained, though a df steer was bgn at 2119, but was not attained. Acft impacted 45-50 deg rising trrn abt 100' blo mtn ridge at 3200' lvl. No preimpact part failure/malfunction was fnd. Exam revealed: eng RPM 2699, throttle/mixture full fwd, airspd 30 KTS. Prop was fnd 15' uphill fm wreckage with extsv dmg.

Aircraft

Registration
N51441
Reported as
Maule M-4-210C
Category
Airplane
Serial number
1103C
Airframe hours
9,329
Engine
Continental IO-360-A, 210 horsepower, reciprocating
Damage
Destroyed
Flight
Business · Part 91
Registered owner
Charles T. Gasta
Airworthiness certificate
Standard, Normal
Last inspection
Annual · September 8, 1990 · 9 hours before
Departed
23AK · Lime Village, AK
Destination
BET · Bethel, AK
Flight plan
VFR
Airport
NONE

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
47
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Left
Toxicology
Performed
Flight hours
435 total · 392 in this make and model · 379 as pilot in command

Weather

Conditions
Instrument (IMC) · Night/dark

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.