LAX97LA275

NTSB accident investigation · Grumman American AA-5 · Monterey, CA · August 8, 1997

Accident · FatalLimited investigationFinal report
Date
August 7, 1997, 20:00 local (Aug 8, 1997, 03:00 UTC)
Place
Monterey, CA
Injuries
2 fatal
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N6086LGrumman American AA-5
Weather
Visual (VMC) · Day
Status
Completed · report April 10, 1998
Report
Approved by Office Director
Case key
29864

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

the pilot's failure to maintain adequate clearance from surrounding 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.

In flight collision with terrain/waterCruise
Altitude/clearance - not maintainedPilot in commandCause

Analysis

The aircraft departed Monterey Airport on a local flight and was reported overdue on the day of the flight. It was subsequently found approximately 18 miles southeast of the airport where it had impacted mountainous terrain. The pilot and one passenger were fatally injured and the aircraft was consumed by a postimpact fire.

Factual narrative

On August 7, 1997, at approximately 2000 hours Pacific daylight time, a Grumman American AA-5, N6086L, was destroyed when it impacted mountainous terrain approximately 18 miles southeast of Monterey, California. The pilot and one passenger were fatally injured. The aircraft was owned and operated by the pilot, and had departed Monterey Airport at 1900 on the day of the accident for a local personal flight. Visual meteorological conditions prevailed at the time of the accident and no flight plan had been filed.

On September 24, 1997, a teardown inspection of the aircraft engine was performed by a Lycoming accident investigator and witnessed by an Federal Aviation Administration (FAA) inspector. The engine had incurred extensive fire damage and the magnetos were destroyed by heat. The Lycoming representative stated that there was no evidence of incorrect assembly, internal failure, or excessively worn parts. The exhaust muffler was opened and no evidence of collapsed baffles or other flow restrictions were found. The Lycoming representative stated that the engine appeared to have been serviceable at the time of the accident.

The remainder of the aircraft was destroyed by impact and fire and it was not possible to verify fuel state or control system continuity. The FAA inspector who surveyed the crash site stated that there was no evidence of in-flight structural failure. There was no damage to ground structures or injuries to ground personnel, however, all of the undergrowth in the immediate area of the impact site had been destroyed by the postaccident fire.

Aircraft

Registration
N6086L
Reported as
Grumman American AA-5
Category
Airplane
Serial number
AA5-0186
Engine
Lycoming O-320-A2G, 150 horsepower, reciprocating
Damage
Destroyed
Fire
On-Ground
Flight
Personal · Part 91
Registered owner
Samuel G. Rhea
Airworthiness certificate
Standard, Normal
Departed
MRY · CA

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
31
Certificate
Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Left
Toxicology
Performed
Flight hours
4,000 total · 150 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
270° at 9 knots
Visibility
20 statute miles
Lowest ceiling
None
Temperature
59 °F, dew point 55 °F
Altimeter
30.00 inHg
Observed at
KMR, 18 nm away