WPR24LA086

NTSB accident investigation · Beech A35 · Maricopa, AZ · February 11, 2024

Accident · No injuriesClass 3 · LimitedFinal report
Date
February 11, 2024, 10:30 local (17:30 UTC)
Place
Maricopa, AZ
Injuries
3 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N691BBeech A35
Defining event
Landing: Landing gear not configured
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 3
NTSB office
Western Pacific Region
Parties
FAA
FAA report
20240211000629A
Case key
193781

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 failure to properly configure the landing gear and verify its position before landing, which resulted in a gear-up landing.

Findings · 3

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.

Use of equip/info: use of equip/systemPersonnel issues › Task performance · PilotBeech A35: 2 casesAll aircraft: 1,391 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 she put the landing gear switch in the down position when the airplane was midfield on the downwind leg of the traffic pattern and lowered the flaps on the base turn. The pilot also stated that she did not look at the gear position indicator before landing. Security video captured the airplane on short final, and the landing gear appeared to be in the retracted position. The airplane subsequently landed gear-up, substantially damaging the fuselage. Following the accident, the landing gear switch was found in the down position, and the main landing gear doors were partially extended, with the inboard edges of the doors contacting the ground. Postaccident examination revealed no damage to the left main landing gear door, scraping damage to the extended ridge on the right main landing gear door, and scraping damage to the aft and outboard edges of the nose gear doors. The observed damage was consistent with all the landing gear being fully retracted upon landing. An operational check of the landing gear system revealed no anomalies. The accident is consistent with the pilot’s failure to configure the landing gear and to verify its position before landing.

Factual narrative

On February 11, 2024, at 1030 mountain standard time, a Beech A35, N619B, was substantially damaged when it was involved in an accident near Maricopa, Arizona. The pilot and two passengers were not injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot reported that she had just taken off and planned to remain in the traffic pattern. She stated that she put the landing gear switch in the down position when the airplane was midfield and lowered the flaps during the base turn. The pilot stated that she did not look at the gear position indicator before landing. Security video captured the airplane on final approach, and the landing gear appeared to be retracted. The airplane landed with the gear up, resulting in substantial damage to the fuselage. Following the accident, the landing gear switch was observed in the down position, and both main landing gear doors were partially extended where the airplane came to rest. The nose gear doors were not visible. Recovery personnel hoisted the airplane and left the landing gear switch in the down position. Upon activating the master switch, the landing gear began to lower. The nose gear doors initially did not open due to damage. The nose gear doors were pried open and all three landing gear then lowered under aircraft power. Recovery personnel stated that the nose gear drag brace was damaged during the initial attempts to lower the gear during recovery. Examination of the underside of the airplane revealed scraping and impact damage to the skin and stringers of the underbelly from the nose gear doors aft to near the trailing edge of the wings. Scraping damage to the nose gear doors was concentrated near the outboard and aft edges, with scratch marks angled predominantly 45° from the centerline of the airplane and the normal direction of forward travel. The right main landing gear door sustained scraping damage to the protruding ridge on the gear door; there was no visible damage to the left main landing gear door. The airplane was suspended using a crane and lifting straps. The landing gear switch in the cockpit was observed in the down position. The master power switch was turned on and the landing gear switch was placed in the up position. The gear drive motor was heard activating, and all three landing gear began to retract. The retraction halted about midway due to insufficient airplane battery power, so the landing gear switch was placed in the down position. The gear motor operated, and the landing gear fully extended. An auxiliary battery power unit was connected to the airplane’s battery. The master power switch was turned on again, and the landing gear switch was placed in the up position. The three landing gear retracted until the nose gear wheel contacted the forward lifting strap, which prevented full retraction of the nose gear. The landing gear switch was placed in the down position, and all three landing gear extended fully. Thelanding gear were raised and lowered two additional times with the same results. No anomalies were noted with the landing gear system during the operational checks.

Aircraft

Registration
N691B
Reported as
Beech A35
Category
Airplane
Serial number
D-1694
Built
1949
Airframe hours
7,540
Engine
Continental E225-8, 225 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · March 4, 2023 · 863 hours before
Departed
KCHD · Chandler, AZ
Destination
Same as departure
Airport
A39 · Ak-Chin Rgnl, runway 04/22, 4,751 × 50 ft, asphalt
Equipment
Handheld GPS, Auto-pilot, ADS-B

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
37
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Last flight review
March 25, 2023
Seat
Left
Restraint
Lap only
Flight hours
356 total · 101 in this make and model · 206 as pilot in command · 4 in the last 90 days · 1 in the last 30 days · 0 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
46 °F, dew point 39 °F
Altimeter
30.21 inHg
Observed at
KCGZ, 8 nm away
METAR
KCGZ 111756Z AUTO 00000KT 10SM CLR 08/04 A3021 RMK AO2 SLP234 6//// T00830039 10083 20011 53013 PNO $

Docket · 5

The files NTSB released with the investigation on November 26, 2024, on NTSB’s docket system: statements, records, photos and specialists’ reports. 58.0 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.