DEN04CA054

NTSB accident investigation · Cessna T310R · Broomfield, CO · March 21, 2004

Accident · No injuriesData collectionFinal report
Date
March 21, 2004, 12:00 local (19:00 UTC)
Place
Broomfield, CO
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N3465GCessna T310R
Weather
Visual (VMC) · Day
Status
Completed · report June 30, 2004
Report
Approved by Office Director
Parties
FAA FSDO
FAA report
20040321008499A
Case key
58980

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

the pilot's improper in-flight planning/decision and his failure to verify the landing gear position. Factors contributing to the accident were the pilot's diverted attention due to the electrical failure.

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.

Wheels up landingLanding - flare/touchdown
In-flight planning/decision - improperPilot in commandCause
Gear extension - not verifiedPilot in commandCause
Diverted attentionPilot in commandFactor
Electrical system - failureFactor
Wheels up landing - inadvertentPilot in command

Analysis

According to the pilot, he had been experiencing electrical problems for the majority of his flight. The pilot reported that he entered a downwind for runway 29R, lowered his landing gear and set 15 degrees flaps. The pilot noticed that the flap indicator was not down so he raised the flaps lever to avoid problems later. The pilot did not visually verify that his gear was down. During the landing flare, both propellers came in contact with the ground and the airplane slid along the runway for several hundred feet, substantially damaging a bulkhead.

Factual narrative

On March 21, 2004, at approximately 1200 mountain standard time, a Cessna T310R, N3465G, was substantially damaged during a gear-up landing at Jefferson County Airport (BLC), Broomfield, Colorado. The private pilot, the sole occupant on board, was not injured. Visual meteorological conditions prevailed. A visual flight rules flight plan had been filed for the flight being conducted under the provisions of Title 14 CFR Part 91. The cross-country flight had departed Granby, Colorado, at approximately 1100.

According to the pilot, he had been experiencing electrical problems for the majority of his flight. Upon arriving at BJC, he was unable to communicate with the tower and entered a traffic pattern for runway 29R and began to look for light gun signals. He stated that he had extended the flaps to 15 degrees and verified via a checklist that the gear was down. When he turned final, he noticed an airplane on the runway and initiated a go-around.

The pilot said that he entered a downwind for runway 29R for a second time, "lowered his landing gear and set 15 [degrees] flaps." The pilot "noticed that the flap indicator was not down," so he raised the flaps lever to avoid problems later. The pilot did not visually verify that his gear was down. During the landing flare, both propellers came in contact with the runway and the airplane slid along the runway for several hundred feet, substantially damaging a bulkhead.

Aircraft

Registration
N3465G
Reported as
Cessna T310R
Category
Airplane
Serial number
310R0844
Airframe hours
3,014
Engines
Teledyne Continental TSIO-520-B-C, 300 horsepower, reciprocatingTeledyne Continental TSIO-520-B-C, 300 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Conn-Behr Aircraft LLK
Airworthiness certificate
Standard, Normal
Last inspection
Annual · February 12, 2004 · 29 hours before
Departed
GNB · Grandby, CO
Destination
BJC · Broomfield, CO
Flight plan
VFR
Airport
BJC · Jeffco, runway 29R, 9,000 × 100 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
50
Injuries
None
Certificate
Private
Airplane ratings
Multi-engine land, Single-engine sea, Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Last flight review
March 18, 2004
Seat
Left
Flight hours
310 total · 37 in this make and model · 199 as pilot in command · 82 in the last 90 days · 34 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Variable at 5 knots
Visibility
50 statute miles
Lowest ceiling
None
Temperature
52 °F, dew point 23 °F
Altimeter
30.32 inHg
Observed at
BJC, 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.