LAX93LA051

NTSB accident investigation · Cessna 421C · Santa Maria, CA · November 22, 1992

Accident · Serious injuriesLimited investigationFinal report
Date
November 22, 1992, 13:21 local (21:21 UTC)
Place
Santa Maria, CA
Injuries
1 serious, 2 uninjured
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N52AKCessna 421C
Weather
Visual (VMC) · Day
Status
Completed · report September 14, 1993
Report
Approved by Office Director
FAA report
19921122047569A
Case key
27873

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

1) The internal failure of the left engine, left magneto due to inadequate maintenance and non compliance with the manufacturers service bulletins and recommendations, and 2) the failure of the pilot to attain the proper touchdown point during the landing attempt. Factors in the accident were the inability of the pilot to shut off the left magneto and the false landing gear indications, both for undetermined reasons.

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/malfCruise - normal
1 engine
Ignition system,magneto - disintegratedCause
Maintenance,service bulletin/letter - not followedCompany maintenance personnelCause
Maintenance,inspection - inadequateCompany maintenance personnelCause
Airframe/component/system failure/malfunctionCircling (ifr)
Landing gear,gear warning system - false indicationFactor
Reason for occurrence undetermined
Go-around - initiatedPilot in command
UndershootApproach - vfr pattern - final approach
Proper touchdown point - not attainedPilot in commandCause
On ground/water encounter with terrain/waterLanding - roll
Terrain condition - ditch
On ground/water collision with objectLanding - roll
Object - fence

Analysis

Twelve minutes after departure, the left engine began to run rough & vibrate. The pilot said he could not correct the problem & shut the left engine down. No emergency was declared & the pilot told ATC that he would continue to his destination, 210 NM & 1.5 hours away. The pilot overflew 5 airports with runways over 5,000 ft long & a mountain range. The pilot executed a VOR approach & entered an extended downwind pattern. On short final the pilot executed a go around because he did not get any gear down indications. He then maneuvered for a downwind landing on runway 12. The aircraft hit the ground 100 yards short of the runway, then collided with a ditch & the airport fence. An FAA inspector said there were three clear tire tracks from the point of touchdown to the ditch, where the gear was sheared off. He found no problems with the gear system. Exam of the left engine revealed a left magneto internal failure due to lack of lubrication & wear, which caused cylinder cross firing.

Aircraft

Registration
N52AK
Reported as
Cessna 421C
Category
Airplane
Serial number
421C0204
Airframe hours
4,384
Engine
Continental GTSIO-520-L1B, 375 horsepower, reciprocating
Damage
Destroyed
Flight
Executive/Corporate · Part 91
Operator
Farroll Equipment Compnany
Registered owner
Farroll Equipment Compnany
Airworthiness certificate
Standard, Normal
Last inspection
Annual · July 16, 1992 · 128 hours before
Departed
TVL · Lake Tahoe, CA
Flight plan
IFR
Airport
SMX · Santa Maria Public, runway 3, 6,300 × 150 ft, asphalt

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
41
Certificates
Airline transport, Flight instructor
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
4,512 total · 503 in this make and model · 2,452 as pilot in command · 101 in the last 90 days · 36 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
290° at 13 knots
Visibility
15 statute miles
Lowest ceiling
3,300 ft broken
Temperature
61 °F, dew point 54 °F
Altimeter
29.00 inHg
Observed at
SMX, 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.