LAX98LA232

NTSB accident investigation · Beech A36TC · Boulder City, NV · July 14, 1998

Accident · No injuriesLimited investigationFinal report
Date
July 14, 1998, 09:45 local (16:45 UTC)
Place
Boulder City, NV
Injuries
1 uninjured
Damage
Destroyed
Phase of flight
Approach
Aircraft
N999AJBeech A36TC
Weather
Visual (VMC) · Day
Status
Completed · report March 31, 2000
Report
Approved by Office Director
Case key
43188

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

On this page

Probable cause

loss of engine power for undetermined reasons over unsuitable terrain.

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.

Loss of engine powerApproach - vfr pattern - downwind
Reason for occurrence undetermined
Forced landingEmergency descent/landing
Terrain condition - none suitable
On ground/water encounter with terrain/waterLanding - flare/touchdown

Analysis

The pilot was inbound to land after a cross-country flight. While on final approach, and due to a possible conflict with parachutists, he changed runways at the uncontrolled airport. As he was maneuvering at low altitude he lost engine power. The aircraft was over unfavorable terrain at the time, and the pilot chose to land in one of three sewage treatment ponds. The damage after landing in the pond appeared to be substantial; however, during the recovery of the aircraft it was destroyed. When the Safety Board viewed the aircraft it was disassembled with the engine missing.

Factual narrative

On July 14, 1998, about 0945 hours Pacific daylight time, a Beech A36TC, N999AJ, was destroyed following a forced landing at Boulder City, Nevada. The forced landing was precipitated by a total loss of power while the aircraft was maneuvering in the traffic pattern for landing. The pilot reported no injuries. Visual meteorological conditions prevailed for the personal cross-country flight under the provisions of 14 CFR Part 91. No flight plan was filed. The flight originated at La Verne, California, on the morning of the accident at 0755.

The pilot, who had owned the aircraft for several years, was inbound for landing on runway 27. Due to a possible conflict with parachutists, he changed to runway 33. As he was maneuvering to land on runway 33, the engine lost all power. The pilot was low over unfavorable terrain and chose to land in one of the three sewage treatment ponds.

The damage after landing in the pond appeared to be substantial; however, during the recovery the aircraft was destroyed and sources of evidence were limited. The Safety Board inspected the fuel cell reservoirs of both wing fuel tanks at the recovery yard in Phoenix, Arizona, and they both appeared to have operational flapper doors.

A maintenance technician at Boulder City reportedly drained about 15 gallons from the left fuel tank and about 10 gallons from the right. All fuel lines reportedly had water inside the lines.

Reports of smoke signatures trailing down the left side of the fuselage from the engine compartment were unsubstantiated. When the Safety Board viewed the aircraft it was disassembled and the engine was not present.

Aircraft

Registration
N999AJ
Reported as
Beech A36TC
Category
Airplane
Serial number
EA-417
Airframe hours
1,642
Engine
Continental IO-520-UB, 300 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Registered owner
Allen J. Sheerin
Airworthiness certificate
Standard, Normal
Last inspection
Annual · March 6, 1998 · 17 hours before
Departed
POC · La Verne, CA
Destination
61B · Boulder City, NV

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
70
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
4,000 total

Weather

Conditions
Visual (VMC) · Day