MIA91LA126

NTSB accident investigation · Rudolph Zeller Lancair · Titusville, FL · April 22, 1991

Accident · FatalLimited investigationFinal report
Date
April 22, 1991, 10:53 local (14:53 UTC)
Place
Titusville, FL
Injuries
1 fatal, 1 minor
Damage
Destroyed
Phase of flight
Approach
Aircraft
N360RRudolph Zeller Lancair
Weather
Visual (VMC) · Day
Status
Completed · report January 25, 1993
Report
Approved by Office Director
FAA report
19910422011739A
Case key
32853

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 use of improper materials for construction of the alternate air door by the aircraft owner/builder resulting in failure and separation of the door which resulted in blockage of air flow to the carburetor and loss of all engine power.

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(total) - mech failure/malfApproach - vfr pattern - downwind
Induction air control,alternate air/door - improperCause
Maintenance,design change - performedManufacturerCause
Material inadequate,improperManufacturerCause
Induction air control,alternate air/door - fatigueCause
Induction air control,alternate air/door - separationCause
Induction air control/system - blocked(partial)Cause
Forced landingDescent - emergency
In flight collision with terrain/waterDescent - emergency
Terrain condition - berm

Analysis

Flt experienced total loss of engine power and crashed while attempting a forced landing. Proper fuel quantity was present in acft and engine and there was no evidence to indicate precrash mechanical failure or malfunction of the engine assembly. The carburetor air box alternate air door was found broken off in the air box after the accident and was in a position to block air flow to the carburetor. The door was made by the acft owner/builder out of .032 inch thick metal with a sharp 90 degree bend at the point of failure. The acft plans call for .040 inch metal. The carburetor air box had no impact damage which would have caused the door to fail and marks in the box indicated the door had moved around in the box for sometime.

Aircraft

Registration
N360R
Reported as
Rudolph Zeller Lancair
Category
Airplane, amateur-built
Serial number
354
Airframe hours
7
Engine
Lycoming O-360-A1A, 180 horsepower, reciprocating
Damage
Destroyed
Flight
Instructional · Part 91
Operator
Zeller, Rudolph
Registered owner
Zeller, Rudolph
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · March 18, 1991 · 7 hours before
Departed
COI · Cocoa Beach, FL
Airport
TIX · Space Center Executive, runway 36, 6,001 × 150 ft

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
62
Certificates
Flight instructor, Airline transport
Airplane ratings
Multi-engine land, Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Right
Flight hours
31,500 total · 4 in this make and model · 28,500 as pilot in command · 90 in the last 90 days · 30 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
40° at 3 knots
Visibility
4 statute miles
Lowest ceiling
None
Temperature
70 °F
Altimeter
29.00 inHg
Observed at
TIX, 1 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.