20060124000549A

Accident · Substantial damage

FAA accident report · Cessna T210N · Mariposa, CA · January 24, 2006

Date: January 24, 2006 · 11:40 local
Place: Mariposa, CA
Phase of flight: Fcd/Prec Ldg From Cruise
Operating rules: General operating rules (Part 91)
Damage: Substantial damage
Aircraft: N4791C
NTSB investigation: NTSBLAX06LA094
Reported as: Cessna T210N
Reported engine: Continental TSIO520R
People aboard: 1
Fatal injuries: 0
Pilot’s flight hours: 2,100 total1,000 in this make and model30 in the last 90 days

N4791CRegistration cancelled Apr 4, 2006 · Cessna T210NS/N 21063627 · Built 1979 Airframe modelCessna T210N Engine modelContinental TSIO-520 seriesReciprocating

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

(-23) On January 24, 2006, N4791C a Cessna T210N s/n 2106327 departed visalia muni (vis) airport at 0900 with the destination of sacramento exc (sac). At 0945 N4791C encountered an engine vibration with fluctuation on the engine condition instruments EGT, CHT, and oil leakage shown on the windshield. The aircraft was at 6500 ft AGL 12 miles south of Mariposa CA when the pilot declared the emergency. N4791C was substantially damaged during the attempt to land. Impacting an oak tree with the left wing of the aircraft veering to the left, the aircraft impacted a stock fence, the right wing and engine impacted a large out crop of rock. The engine was separated from the airframe and came to rest 25' from the main airframe. The remaining airframe and wings remained mostly intact, came to rest 50' from the left side of the road. The pilot had a small injury to his head with no injuries to the passenger.

As the FAA filed it

(-23) ON JANUARY 24, 2006, N4791C A CESSNA T210N S/N 2106327 DEPARTED VISALIA MUNI (VIS) AIRPORT AT 0900 WITH THE DESTINATION OF SACRAMENTO EXC (SAC). AT 0945 N4791C ENCOUNTERED AN ENGINE VIBRATION WITH FLUCTUATION ON THE ENGINE CONDITION INSTRUMENTS EGT, CHT, AND OIL LEAKAGE SHOWN ON THE WINDSHIELD. THE AIRCRAFT WAS AT 6500 FT AGL 12 MILES SOUTH OF MARIPOSA CA WHEN THE PILOT DECLARED THE EMERGENCY. N4791C WAS SUBSTANTIALLY DAMAGED DURING THE ATTEMPT TO LAND. IMPACTING AN OAK TREE WITH THE LEFT WING OF THE AIRCRAFT VEERING TO THE LEFT, THE AIRCRAFT IMPACTED A STOCK FENCE, THE RIGHT WING AND ENGINE IMPACTED A LARGE OUT CROP OF ROCK. THE ENGINE WAS SEPARATED FROM THE AIRFRAME AND CAME TO REST 25' FROM THE MAIN AIRFRAME. THE REMAINING AIRFRAME AND WINGS REMAINED MOSTLY INTACT, CAME TO REST 50' FROM THE LEFT SIDE OF THE ROAD. THE PILOT HAD A SMALL INJURY TO HIS HEAD WITH NO INJURIES TO THE PASSENGER.

NTSB investigation

The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.

NTSB LAX06LA094Accident · Minor injuriesLimited investigationFinal reportMariposa, CAThe failure of the maintenance personnel to follow the procedures in the TCM maintenance manual and adequately torque the engine through-bolts, which led to the separation of the No. 6 cylinder and the catastrophic failure of the engine.Jan 24, 2006 · Substantial damage