MIA84LA028

NTSB accident investigation · Grumman American AA-5B · Okeechobee, FL · November 11, 1983

Accident · No injuriesLimited investigationFinal report
Date
November 10, 1983, 21:40 local (Nov 11, 1983, 02:40 UTC)
Place
Okeechobee, FL
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N123EFGrumman American AA-5B
Weather
Visual (VMC) · Night/dark
Status
Completed
Report
Approved by Office Director
FAA report
19831110057289A
Case key
31061

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

On this page

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 power(partial) - mech failure/malfCruise
Engine assembly,valve,intake - failure,totalCause
Forced landingApproach
AttemptedPilot in command
In flight collision with objectApproach - vfr pattern - final approach
Light condition - dark nightFactor
Object - wire,transmissionFactor
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The plt reported that during flt, the eng had a partial loss of power. He attempted to divert to an arpt. He was able to get on final apch, but when he saw he could not reach the runway, he turned away from the lights & a building for an emergency landing. However, before landing, the acft collided with power lines, then impacted the ground. An exam of the eng revealed that the exhaust valve head of the #1 cylinder had separated. With continued operation of the eng, debris entered the #1 cylinder causing further damage & loss of power. The sodium cooled exhaust valve, pn 74541 ah-ed, had aprx 300 hrs in service.

Aircraft

Registration
N123EF
Reported as
Grumman American AA-5B
Category
Airplane
Serial number
AA5B-0018
Airframe hours
2,231
Engine
Lycoming O-360, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 135
Registered owner
Air Trek, Inc.
Airworthiness certificate
Standard, Normal
Departed
PBI · West Palm Beach, FL
Destination
TPA · Tampa, FL
Airport
OBE · Okeechobee, runway 4, 5,000 × 150 ft, asphalt

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
26
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Right
Flight hours
2,903 total · 302 in this make and model · 2,703 as pilot in command · 450 in the last 90 days · 15 in the last 24 hours

Weather

Conditions
Visual (VMC) · Night/dark
Wind
210° at 6 knots
Visibility
10 statute miles
Lowest ceiling
25,000 ft broken
Temperature
73 °F, dew point 64 °F
Altimeter
29.00 inHg
Observed at
VRB, 33 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.