ERA12CA247

NTSB accident investigation · Mooney M20J · Butler, PA · March 23, 2012

Accident · No injuriesData collectionFinal report
Date
March 23, 2012, 13:30 local (17:30 UTC)
Place
Butler, PA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N58135Mooney M20J
Defining event
Landing-flare/touchdown: Landing gear not configured
Weather
Visual (VMC) · Day
Status
Completed · report October 15, 2012
Report
Approved by Office Director
NTSB office
Eastern Region Aviation
Parties
FAA/FSDO
FAA report
20120323011789A
Case key
83200

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 pilot’s failure to extend the landing gear before landing.

Findings · 2

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.

Action: lack of actionPersonnel issues › Action/decision · PilotMooney M20J: 5 casesAll aircraft: 792 casesProbable cause
Landing gear system: gear extension and retract sysAircraft › Aircraft systems · Not used/operatedMooney M20J: 7 casesAll aircraft: 416 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

The pilot stated that, when he returned to the airport after a local flight, two airplanes were in the traffic pattern and a third airplane was inbound about 10 miles east. To sequence with the two airplanes in the pattern and the third airplane on the extended downwind leg, the pilot did not enter the traffic pattern at the midpoint of the downwind leg, but entered the traffic pattern closer to the approach end of the intended runway. He lowered the flaps, but did not lower the landing gear. He turned onto the base leg, extended full flaps, and then turned onto final approach. While on final approach, the pilot had a sense that the airplane was fast and that the “sight picture” was lower than usual, but he did not detect that the landing gear was retracted or recall hearing the landing gear warning horn. He heard the propeller contact the runway and attempted to lower the landing gear, but it was too late. He heard the landing gear warning horn after the airplane came to rest. Postaccident examination of the airplane revealed that a main stringer and leading edge rib inside the right wing were damaged. The pilot stated that there were no preimpact malfunctions or failures that would have precluded normal operation.

Factual narrative

The pilot stated that after departure he proceeded to the local practice area then elected to return. Two airplanes were in the traffic pattern and a third airplane was about 10 miles to the east inbound. In order to sequence with the 2 airplanes in the pattern and the third airplane on the extended downwind, he entered the traffic pattern close to the approach end of the intended runway rather than midfield downwind. He lowered the flaps, but “…failed to lower the gear at the ‘key’ point….” He turned onto base where he extended full flaps then turned onto final approach. While on final approach he had a sense that the airplane was fast, but did not detect that the landing gear was retracted. He continued the approach and sensed that the sight picture was lower than usual, but did not recall hearing the landing gear warning horn. He heard the propeller contact the runway and attempted to lower the landing gear but it was too late. He heard the landing gear warning horn after the airplane came to rest. Postaccident inspection of the airplane revealed a main stringer and leading edge rib inside the right wing were damaged.

Aircraft

Registration
N58135
Reported as
Mooney M20J
Category
Airplane
Serial number
24-1567
Airframe hours
1,060
Engine
Lycoming IO-360-A3, 200 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Brubaker Clifford E
Registered owner
Brubaker Clifford E
Airworthiness certificate
Standard, Normal
Last inspection
Annual · March 12, 2012
Departed
BTP · Butler, PA
Destination
BTP · Butler, PA
Airport
BTP · Butler County Airport, runway 08, 4,801 × 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
73
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 3, With waivers/limitations
Last flight review
November 2, 2011
Seat
Left
Flight hours
1,192 total · 111 in this make and model · 1,192 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
90° at 6 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
75 °F, dew point 55 °F
Altimeter
30.04 inHg
Observed at
BTP

Docket · 6

The files NTSB released with the investigation on August 10, 2012, on NTSB’s docket system: statements, records, photos and specialists’ reports. 9.8 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.