MIA99LA068

NTSB accident investigation · Cessna 310N · Clearwater, FL · January 25, 1999

Accident · No injuriesLimited investigationFinal report
Date
January 25, 1999, 15:13 local (20:13 UTC)
Place
Clearwater, FL
Injuries
3 uninjured
Damage
Substantial damage
Phase of flight
Taxi
Aircraft
N5080QCessna 310N
Weather
Visual (VMC) · Day
Status
Completed · report April 19, 2001
Report
Approved by Office Director
FAA report
19990125000739A
Case key
45668

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

a ground fire in the left wing due to an undetermined ignition source.

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.

FireTaxi - from landing
Fluid,fuel - leakFactor
Wing - undetermined

Analysis

After landing on runway 17L and turning onto taxiway 'L,' the left wing caught fire. CFR (Crash, Fire, Rescue) personnel responded and the fire was extinguished. The pilot told the FAA that after he turned onto the taxiway he heard a 'bang.' He attempted to turn the airplane to see if anything was on the taxiway, but he saw smoke. He stopped the airplane, shut off the engines, and all the occupants evacuated the airplane out the right door. Examination of the airplane's left wing revealed that soot was found in the wing bay outboard of the auxiliary fuel cell, soot was found on the stall warning switch, near an unused open terminal. Fuel stains were found on the bottom of the fuel cell bay liner and on the lower wing skin in the fuel cell area. The wing access panel, outboard of the APU plug receptacle in the engine exhaust trail area was found not sealed, as was the flap bell crank bolt access panel also located in the engine exhaust trail area. The battery positive cable was an automotive type cable. The relay end of the cable had melted. The battery ground lead had numerous broken wire strands at the battery end terminal. The fuel pump resistor and wire bundle from the left wing were sent to the NTSB Materials Laboratory, Washington, D.C., in an attempt to determine if they were the source of ignition. Examination of the wires revealed they were sooted and displayed heat damage consistent with exposure to a fire. Most of the insulation on the individual wires were missing, exposing the conductors. Where the insulation was present, the insulation varied in condition from slightly sooted to completely charred and crumbling. The inspection of individual wires with a stereo microscope revealed, the copper conductors were heat damaged but remained intact. No indication of arcing or electrical shorting were found on the wire surfaces. No determination of an ignition source, for the ground fire, was determined.

Factual narrative

On January 25, 1999, about 1513 eastern standard time, a Cessna 310N, N5080Q, registered to an individual caught fire while taxiing after landing at the St. Petersburg/Clearwater Airport, Clearwater, Florida. Visual meteorological conditions prevailed at the time, and no flight plan was filed for the 14 CFR Part 91 personal flight. The airplane sustained substantial damage. The commercial-rated pilot, and two passengers reported no injuries. The flight had departed from the same airport at 1400.

After landing on runway 17L and turning onto taxiway "L," the left wing caught fire. CFR (Crash, Fire, Rescue) personnel responded and the fire was extinguished. The pilot told the FAA that after he turned onto the taxiway he heard a "bang." He attempted to turn the airplane to see if anything was on the taxiway, but he saw smoke. He stopped the airplane, shut off the engines, and all the occupants evacuated the airplane out the right door.

Examination of the airplane's left wing, after it was removed from the airframe, revealed that soot was found in the wing bay outboard of the auxiliary fuel cell, and soot was found on the stall warning switch, near an unused open terminal. Fuel stains were found on the bottom of the fuel cell bay liner and on the lower wing skin in the fuel cell area. The wing access panel, outboard of the APU plug receptacle in the engine exhaust trail area was found not sealed, as was the flap bell crank bolt access panel also located in the engine exhaust trail area. The battery positive cable was an automotive type cable. The relay end of the cable had melted. The battery ground lead had numerous broken wire strands at the battery end terminal.

The fuel pump resistor and wire bundle from the left wing were sent to the NTSB Materials Laboratory, Washington, D.C., in an attempt to determine if they were the source of ignition. According to the NTSB Materials Laboratory Factual Report, the resistor and wires were sooted and displayed heat damage "consistent with exposure to a fire." Most of the insulation on the individual wires was missing, exposing the conductors. Where the insulation was present, the insulation varied in condition from slightly sooted to completely "charred and crumbling." The inspection of individual wires with a stereo microscope revealed "...the copper conductors were heat damaged but remained intact. No indication of arcing or electrical shorting were found on the wire surfaces." No determination of an ignition source, for the ground fire, was determined.

Aircraft

Registration
N5080Q
Reported as
Cessna 310N
Category
Airplane
Serial number
310N-0180
Airframe hours
4,281
Engine
Continental IO-470V, 260 horsepower, reciprocating
Damage
Substantial damage
Fire
On-Ground
Flight
Personal · Part 91
Registered owner
Carl Fromhagen
Airworthiness certificate
Standard, Normal
Last inspection
Annual · September 1, 1998 · 20 hours before
Departed
PIE
Airport
PIE · St. Petersburg/Clearwater, runway 17L, 8,500 × 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
72
Certificates
Airline transport, Flight engineer
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
16,000 total · 1,600 in this make and model · 16,000 as pilot in command · 30 in the last 90 days · 5 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
330° at 12 knots
Visibility
7 statute miles
Lowest ceiling
2,600 ft broken
Temperature
63 °F, dew point 54 °F
Altimeter
30.00 inHg
Observed at
PIE

FAA reports on this event · 1

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