Wednesday, May 20, 2020

Cessna 501 Citation ISP, N501KM: Accident occurred May 19, 2020 at William P Hobby Airport (KHOU), Houston, Texas

This is preliminary information, subject to change, and may contain errors. Any errors in this report will be corrected when the final report has been completed.

The National Transportation Safety Board did not travel to the scene of this accident.

Additional Participating Entity:

Federal Aviation Administration / Flight Standards District Office; Houston, Texas

Location: Houston, TX
Accident Number: CEN20LA185
Date & Time: 05/19/2020, 1930 CDT
Registration: N501KM
Aircraft: Cessna 501
Injuries:1 None 
Flight Conducted Under: Part 91: General Aviation - Personal 

On May 19, 2020, about 1930 central daylight time, a Cessna 501, N501KM, sustained substantial damage when it was involved in and accident near Houston, Texas. The pilot was not injured. The airplane was being operated as a Title 14 Code of Federal Regulations (CFR) Part 91 personal flight.

After a normal instrument flight rules (IFR), 2-hour flight from Gainesville, Florida (GNV), the pilot was setting up to land at his final destination (HOU). The pilot reported that during his final approach to runway 13 at HOU, he lowered the landing gear and received 2 of 3 green lights on his landing gear position indicators. The left main landing gear light was not illuminated and a warning horn sounded. The pilot recycled the landing gear with the same result. He reported the situation to HOU tower and asked if they could visually see whether all three landing gear were down. The pilot stated that the HOU tower affirmed that all three landing gear were down. The pilot also stated that a commercial airliner that was taxiing toward the main terminal radioed that they observed all three landing gear were down.

The pilot reported that according to the Pilot Operating Handbook (POH), he initiated an aggressive bank right, followed abruptly by a bank left in an attempt to generate sufficient lateral G-force on the landing gear. The HOU tower asked the pilot his intentions, and the pilot informed them that he would proceed to land. Upon touchdown on runway 13R, the left main landing gear collapsed, and the airplane veered left and came to a stop in a grassy area adjacent to runway 13R and Taxiway Lima, resulting in structural damage to the left wing tip and underbelly of the airplane. The pilot exited the airplane and airport emergency services responded. Recovery personnel manually lifted and locked the left main landing gear down, and the airplane was towed to a hangar facility. The pilot reported that his decision to land was made because the left main landing gear indicator light had malfunctioned in years past, and it was found that the light had malfunctioned, and not the landing gear.

Under the supervision of an FAA airworthiness inspector, the landing gear was examined at a certified manufacturer repair facility at HOU. The landing gear was cycled about 30-times with various hydraulic pressures, and the left main landing gear actuator did not lock in the full down position. The only way to attain a locked left main landing gear was to manually push the gear outward to the down and locked position. When the landing gear was pushed into the locked position, the left main landing gear down indicator light illuminated green, and it appeared that the internal locking mechanism of left main landing gear actuator was not functioning. According to the repair facility, the actuator was a component that is replaced at interval (37,000 cycles) or as needed. The FAA inspector reported that the airplane's logbooks did not show any recent entries concerning anomalies with the left main landing gear.

Aircraft and Owner/Operator Information

Aircraft Make: Cessna
Registration: N501KM
Model/Series: 501 No Series
Aircraft Category: Airplane
Amateur Built: No
Operator: On file
Operating Certificate(s) Held:None 

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual Conditions
Condition of Light: Day
Observation Facility, Elevation: HOU, 46 ft msl
Observation Time: 1932 CDT
Distance from Accident Site: 0 Nautical Miles
Temperature/Dew Point: 30°C / 21°C
Lowest Cloud Condition: Clear
Wind Speed/Gusts, Direction: 11 knots / , 200°
Lowest Ceiling: None
Visibility:  10 Miles
Altimeter Setting: 29.76 inches Hg
Type of Flight Plan Filed: IFR
Departure Point: Gainesville, FL (GNV)
Destination: Houston, TX (HOU)

Wreckage and Impact Information

Crew Injuries: 1 None
Aircraft Damage: Substantial
Passenger Injuries: N/A
Aircraft Fire: None
Ground Injuries: N/A
Aircraft Explosion: None
Total Injuries: 1 None
Latitude, Longitude: 29.645833, -95.276944

HOURS estimated from logbooks or other information - not guaranteed or warranted.

AIRCRAFT: 1979 CESSNA 501 N501KM  s/n: 501-0101, Hours:  5585.5 hours; 4575 landings

ENGINES: JT15D-1A,  s/n: 77002 – 5484.4 hours; 4496 cycles

JT15D-1A,  s/n: 77007 – 5585.5 hours; 4575 cycles  

Info from Maintenance Items Report dated July 8, 2020


(2) Collins VHF20B

(2) Collins VIR 30A

Collins DME 40

Collins ADF60A; s/n: 683 & 2321

Garmin GTX 335

Bendix KA-35A

Honeywell RD-600

Honeywell RD-44

Avtech Audio Panel 1660-1; s/n: 163 & 254

EDOAIRE 156-01; s/n: 113 & 1296

Bendix 4018639-901

Bendix RT-1151A

DESCRIPTION OF ACCIDENT: On May 19, 2020, pilot was on final approach to Houston Hobby Airport when had a failed gear warning. Pilot was able to get gear to extend. Upon landing the left main gear collapsed and the aircraft ran off the side of the runway.

LOCATION OF AIRCRAFT:  Signature Flight Support at Houston Hobby Airport.

Repair Estimate

REMARKS: Insurer reserves the right to reject any and all bids. 

Salvage is as is/where is. 

The posting information is the best to our knowledge. 

An inspection of the salvage is highly recommended. 

Logbooks may not be complete.

WARRANTY:  There is no warranty, express or implied for the information provided herein or the condition, useability, workability, operability or marketability of the aircraft salvage.  All times are approximate and the logbooks and aircraft should be inspected by each bidder BEFORE BIDDING.  Failure of the bidder to view the salvage or wreckage, or confirm any information provided is NOT grounds for a claim or withdrawal of bid after bid closing date.)

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