ERA12LA217

NTSB accident investigation · Cessna 310K · Olive Branch, MS · March 7, 2012

Accident · No injuriesLimited investigationFinal report
Date
March 7, 2012, 08:43 local (14:43 UTC)
Place
Olive Branch, MS
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Standing
Aircraft
N6974LCessna 310K
Defining event
Standing-engine(s) start-up: Fire/smoke (non-impact)
Weather
Visual (VMC) · Day
Status
Completed · report September 13, 2012
Report
Approved by Office Director
NTSB office
Eastern Region Aviation
Parties
FAA/FSDO
FAA report
20120307002919A
Case key
83073

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

Fuel leaking from the left engine fuel strainer onto electrical connections after engine start, which resulted in a fire.

Findings · 1

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Fuel system: fuel filter-strainerAircraft › Aircraft systems · MalfunctionCessna 310K: 1 caseAll aircraft: 52 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

Shortly after starting the left engine, the pilot observed smoke coming from the left engine nacelle. Smoke was then observed in the area of the pilot's rudder pedals. The pilot shut down both engines and exited the airplane. Local personnel responded and extinguished the fire. An examination of the airplane revealed that the left engine and forward wing area were heavily damaged by fire. The most extensive damage was centered around the left engine fuel strainer that was mounted on the engine firewall. Due to the fire damage, the fuel system was not pressurized during the examination. A review of the airplane records revealed no recent maintenance in the area of the fuel strainer. It is likely that fuel leaking from the strainer contacted adjacent electrical connections resulting in the fire.

Factual narrative

On March 7, 2012, about 0843 central standard time, a Cessna 310K, N6974L, was substantially damaged following an engine fire on the ramp at Olive Branch Airport (OLV), Olive Branch, Mississippi. The certificated commercial pilot was not injured. The airplane was registered to a corporation and operated by the pilot under the provisions of 14 Code of Federal Regulations Part 91 as a personal flight. Visual meteorological conditions prevailed and no flight plan was filed. The flight was originating at the time of the accident. According to the pilot, following an uneventful pre-flight inspection, both engines started normally and all indications were "in the green." He began to smell an odor of "burned paint" and looked outside the cockpit. He observed smoke in the area of the left engine nacelle. He shut down the engines and observed smoke coming from the area of the rudder pedals. He was exiting the cockpit when he heard a loud "pop." The left engine became engulfed in flames. Local personnel responded with fire extinguishers and put out the fire. An inspector with the Federal Aviation Administration responded to the accident site and examined the wreckage. The left engine was extensively damaged by the fire. A row of rivets was popped at wing structure near the fire damage. The wreckage was secured so that a subsequent examination could be performed. A follow-up examination by the FAA inspector revealed that the most intense part of the heat damage was located near and around the fuel strainer on the left engine firewall. The battery and starter solenoids were also located in this area. The inspector elected not to pressurize the fuel lines due to the heat and fire damage. The FAA inspector reported that no maintenance was performed on the airplane since a 100-hour inspection in November, 2011. The last annual inspection was performed in July, 2011.

Aircraft

Registration
N6974L
Reported as
Cessna 310K
Category
Airplane
Serial number
310K0074
Airframe hours
2,574
Engines
Cont Motor I0-470 SERIES, 260 horsepower, reciprocatingCont Motor I0-470 SERIES, 260 horsepower, reciprocating
Damage
Substantial damage
Fire
On-Ground
Flight
Personal · Part 91
Operator
Jordan B. Straub
Registered owner
Cp Aviation Services Co
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · November 3, 2011
Departed
OLV · Olive Branch, MS
Destination
ABI · Abilene, TX
Airport
OLV · Olive Branch Airport

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
22
Injuries
None
Certificate
Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Without waivers/limitations
Last flight review
June 30, 2011
Seat
Left
Flight hours
711 total · 25 in this make and model · 650 as pilot in command · 200 in the last 90 days · 100 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
170° at 12 knots, gusting 23
Visibility
10 statute miles
Lowest ceiling
25,000 ft broken
Temperature
59 °F, dew point 39 °F
Altimeter
30.29 inHg
Observed at
OLV

Docket · 5

The files NTSB released with the investigation on July 20, 2012, on NTSB’s docket system: statements, records, photos and specialists’ reports. 5.5 MB in all.

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.