SEA04LA094

NTSB accident investigation · Beech P-35 · Havre, MT · May 29, 2004

Accident · No injuriesLimited investigationFinal report
Date
May 29, 2004, 11:35 local (17:35 UTC)
Place
Havre, MT
Injuries
4 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N7DRBeech P-35
Weather
Visual (VMC) · Day
Status
Completed · report October 28, 2004
Report
Approved by Office Director
Parties
FAA-FSDO
FAA report
20040529011079A
Case key
59365

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 loss of engine power due to fuel starvation during the initial climb after takeoff as a result of an unsecured fuel sender unit which resulted in a false fuel quantity indication.

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 powerTakeoff - initial climb
Fluid,fuel - starvationCause
Fuel system,fuel quantity float/sensor - not securedCause
Engine instruments,fuel quantity gage - false indicationCause
Forced landingEmergency descent/landing
In flight collision with terrain/waterEmergency descent/landing
Terrain condition - runway

Analysis

The pilot reported that just after lift-off from runway 25, he verified a positive rate of climb and retracted the landing gear. Shortly thereafter, the pilot felt a slight hesitation in the engine. The pilot switched the fuel selector when the engine suddenly lost power. The pilot initiated a forced landing on the remaining runway. The aircraft touched down and the right main gear collapsed. The right wing contacted the runway surface and the aircraft spun around coming to rest near the end of the runway. Post-accident inspection of the engine found no evidence of a mechanical malfunction. Both fuel tanks were inspected for fuel and a trace amount of fuel was found in each fuel bladder. Inspection of the right wing inboard fuel sender found that the unit was unsecured. The left wings sender unit was secured. Both sender units were checked for cockpit indications. Both indicated empty when the float was extended to the bottom of the tanks and indicated fuel levels throughout the movement of the float from top to bottom. Approximately three gallons of fuel was put in the right side fuel tank to inspect for leaks. None were detected. The left wings piping structure had pulled out of the bladder connector during the accident sequence which allowed fuel to drain from the left fuel tank therefore fuel quantity could not be determined. The left and right side fuel tanks are not interconnected.

Factual narrative

On May 29, 2004, approximately 1310 mountain daylight time, a Beech P-35, N7DR, registered to and operated by the pilot as a 14 CFR Part 91 local flight, experienced a loss of engine power shortly after takeoff from Havre, Montana. During the emergency landing, the aircraft was substantially damaged. Visual meteorological conditions prevailed at the time and no flight plan was filed. The commercial pilot and his three passengers were not injured.

During a telephone interview and subsequent written statement, the pilot reported that just after lift-off from runway 25, he verified a positive rate of climb and retracted the landing gear. Shortly thereafter, the pilot felt a slight hesitation in the engine. The pilot switched the fuel selector when the engine suddenly lost power. The pilot noted that at this time the aircraft had drifted about 200 feet off of runway centerline. He immediately lowered the nose to maintain airspeed and extended the landing gear to re-land on the remaining runway. The aircraft touched down and the right main gear collapsed. The right wing contacted the runway surface and the aircraft spun around coming to rest near the end of the runway.

After the aircraft was removed from the runway and placed in a secured location, a Federal Aviation Administration Inspector from the Helena, Montana, Flight Standards District Office, and a certified Airframe & Powerplant, Inspection Authorization mechanic inspected the aircraft. The mechanic reported that during the engine inspection, no evidence of a mechanical malfunction was noted. No fuel leaks were detected. The fuel selector was checked and found functional.

Both fuel tanks were inspected for fuel and a trace amount of fuel was found in each fuel bladder. Inspection of the right wing inboard fuel sender found that the unit was unsecured. The left wings sender unit was secured. Both sender units were checked for cockpit indications. Both indicated empty when the float was extended to the bottom of the tanks and indicated fuel levels throughout the movement of the float from top to bottom. Approximately three gallons of fuel was put in the right side fuel tank to inspect for leaks. None were detected. The left wings piping structure had pulled out of the bladder connector during the accident sequence which allowed fuel to drain from the left fuel tank therefore fuel quantity could not be determined. The left and right side fuel tanks are not interconnected.

Aircraft

Registration
N7DR
Reported as
Beech P-35
Category
Airplane
Serial number
D-6995
Airframe hours
4,720
Engine
Continental IO-470-N, 260 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Walter E. Herman
Airworthiness certificate
Standard, Normal
Last inspection
Annual · June 1, 2003 · 75 hours before
Departed
HVR · Havre, MT
Destination
3U8 · Big Sandy, MT
Airport
HVR · Havre City - County, runway 25, 5,205 × 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
61
Injuries
None
Certificates
Commercial, Flight instructor
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--w/ waivers/lim
Last flight review
April 28, 2004
Seat
Left
Flight hours
996 total · 220 in this make and model · 920 as pilot in command · 31 in the last 90 days · 17 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
280° at 16 knots
Visibility
10 statute miles
Lowest ceiling
4,900 ft broken
Temperature
55 °F, dew point 45 °F
Altimeter
29.62 inHg
Observed at
HVR

FAA reports on this event · 1

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