CHI07LA126

NTSB accident investigation · Luscombe 8A · Fruitport, MI · May 1, 2007

Accident · Serious injuriesLimited investigationFinal report
Date
May 1, 2007, 17:15 local (21:15 UTC)
Place
Fruitport, MI
Injuries
2 serious
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N1120BLuscombe 8A
Weather
Visual (VMC) · Day
Status
Completed · report February 28, 2008
Report
Approved by Office Director
Parties
Grand Rapids FSDO
FAA report
20070501009079A
Case key
65738

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

The flight instructor failed to use carburetor heat during takeoff in icing conditions. A factor was the power line pole.

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
Carburetor heat - not usedPilot in command(cfi)Cause
Weather condition - carburetor icing conditions
Forced landingEmergency descent/landing
In flight collision with objectEmergency descent/landing
Object - utility poleFactor
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - ditch

Analysis

During the climb out the engine lost power. The CFI lowered the nose to establish a glide speed of about 65-70 mph and executed a

forced landing to a field. He applied carburetor heat, switched magnetos, and pumped the throttle but with no effect. The CFI saw power

line wires and tried to avoid them by going under the wires, but the airplane's right wing hit a power line pole. The airplane rotated

to the right and landed in the ditch next to a road. The engine was put on an engine test stand and the engine run revealed that it met

operational specifications. The temperature was 16 degrees Celsius and the dew point was 12 degrees Celsius. The mechanic who conducted the airplane's annual inspection five months earlier and who received dual instruction in the airplane before the accident flight stated that he encountered carburetor icing while taxiing and while in cruise flight. A review of two Luscombe owners' handbooks from the late 1940s and early 1950s found guidance recommending full carburetor heat for takeoffs and landings. A placard located next to the carburetor heat lever on the instrument panel stated the following: "Full Carburetor Air Heat Required for Takeoff and Landing." Although originally intended to correct fuel flow problems in early model 8As (during takeoffs with high pitch attitudes), the placard comports with Luscombe 8A owners and pilot operating manual guidance on carburetor icing avoidance. The certificated flight instructor reported that he had not applied carburetor heat until the engine lost power after takeoff.

Factual narrative

On May 1, 2007, about 1715 eastern daylight time, a Luscombe 8A, N1120B, was substantially damaged during a forced landing to a field following a loss of engine power during take off from the Flying-A-Ranch Airport (39Z), Fruitport, Michigan. The certificated flight instructor (CFI) and dual student received serious injuries. The 14 Code of Federal Regulations Part 91 instructional flight departed 39Z about 1715 for a local flight. Visual meteorological conditions prevailed at the time of the accident. No flight plan was filed.

The CFI reported he had flown the airplane for about 45 minutes with another pilot and had shut the airplane down in order to switch pilots. Prior to takeoff on the accident flight, the CFI got in the left seat and the dual student pilot got in the right seat. According to the CFI, the main body fuel tank had just less than 3/4 of a tank of fuel [10.5 gallons] and the wing tank had 6-7 gallons of fuel. The CFI taxied the airplane for takeoff, and after the engine run-up was completed, departed from runway 9. During the climb out the engine lost power. The CFI lowered the nose to establish a glide speed about 65 - 70 mph, and executed a forced landing to a blueberry field. He applied carburetor heat, switched magnetos, and pumped the throttle but with no effect. The CFI saw power line wires and tried to avoid them by going under the wires, but the airplane's right wing hit a power line pole. The airplane rotated to the right and landed in the ditch next to a road. The CFI was able to crawl out of the wreckage, but rescue personnel extracted the dual student from the airplane.

The engine was shipped to Teledyne Continental Motors (TCM) in Mobile, Alabama, for inspection. The engine was put on an engine test stand and an engine run was conducted. The engine run revealed that the engine met TCM operational specifications.

The maximum gross weight of the airplane was 1,260 pounds. The empty weight of the airplane was about 736 pounds. The weight of the pilot was about 255 pounds, and the weight of the dual student was about 220 pounds.

The 1655 surface weather observation at the Muskegon County Airport (MKG), Muskegon, Michigan, located 6 miles northwest of 39Z, indicated that the temperature was 16 degrees Celsius and the dew point was 12 degrees Celsius.

The Transport Canada carburetor-icing chart indicated "Serious icing - any power" with a temperature of 16 degrees Celsius and a dew point of 12 degrees Celsius.

The mechanic who conducted the airplane's annual inspection five months earlier and who received dual instruction in the airplane before the accident flight stated that he encountered carburetor icing while taxiing and while in cruise flight. A placard located next to the carburetor heat lever on the instrument panel stated the following: "Full Carburetor Air Heat Required for Takeoff and Landing." The placard was originally intended to correct fuel flow problems in early model 8As with single fuselage fuel tanks (during takeoffs with high pitch attitudes). A review of two Luscombe owners handbooks from the late 1940s and early 1950s found guidance recommending full carburetor heat for takeoffs and landings for all Luscombe models to prevent engine power loss caused by carburetor ice.

Aircraft

Registration
N1120B
Reported as
Luscombe 8A
Category
Airplane
Serial number
5747
Airframe hours
1,671
Engine
Continental A & C 65, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · December 1, 2006 · 0.8 hours before
Departed
39Z · Fruitport, MI
Flight plan
Unknown
Airport
39Z · Flying-a-Ranch, runway 9, 1,925 × 70 ft, grass/turf

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 · 2

As NTSB recorded them. NTSB leaves out names.

Role
Flight instructor
Age
30
Injuries
Serious
Certificates
Flight instructor, Commercial
Airplane ratings
Multi-engine land, Single-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 2, Without waivers/limitations
Last flight review
June 1, 2005
Seat
Left
Flight hours
2,560 total · 8 in this make and model · 2,380 as pilot in command · 51 in the last 90 days · 35 in the last 30 days · 3 in the last 24 hours
Role
Student pilot
Age
50
Injuries
Serious
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3
Last flight review
June 1, 2005
Seat
Right
Flight hours
400 total

Weather

Conditions
Visual (VMC) · Day
Wind
30° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
63 °F, dew point 54 °F
Altimeter
29.80 inHg
Observed at
MKG, 6 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.