Tuesday, May 10, 2022

Cessna 172P Skyhawk, N52950: Incident occurred May 06, 2022 and Accident occurred September 01, 2016

Federal Aviation Administration / Flight Standards District Office; Anchorage, Alaska

May 06, 2022: Aircraft on approach and struck powerlines at Palmer Municipal Airport (PAAQ), Alaska.

Flight Safety Alaska Inc

Date: 06-MAY-22
Time: 18:15:00Z
Regis#: N52950
Aircraft Make: CESSNA
Aircraft Model: 172
Event Type: INCIDENT
Highest Injury: NONE
Aircraft Missing: No
Damage: MINOR
Activity: PERSONAL
Flight Phase: APPROACH (APR)
Operation: 91

September 01, 2016

September 01, 2016

Aviation Accident Final Report - National Transportation Safety Board

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

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Anchorage, Alaska

Docket And Docket Items - National Transportation Safety Board:

Flight Safety Alaska Inc

Location: Anchorage, Alaska 
Accident Number: GAA16CA487
Date and Time: September 1, 2016, 13:12 Local
Registration: N52950
Aircraft: Cessna 172 
Aircraft Damage: Substantial
Defining Event: Miscellaneous/other 
Injuries: 2 None
Flight Conducted Under: Part 91: General aviation - Instructional


The flight instructor reported that during taxi the airplane started to lean to the right, so he looked out of his window to see if the right tire was flat. He further reported that "the ramp was opening up into a 2 foot wide dark black hole" underneath the right main landing gear. The flight instructor and student pilot egressed from the airplane without further incident.

A postaccident examination revealed substantial damage to the empennage.

The flight instructor reported no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.

Photographs provided by Federal Aviation Administration showed that the right main landing gear had broken through the pavement into a sink hole underneath.

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
The airplane's encounter with a developing sink hole during taxi on the ramp area.

Environmental issues (general) - Effect on equipment

Factual Information

History of Flight

Taxi-to runway Miscellaneous/other (Defining event)

Pilot Information

Certificate: Commercial; Flight instructor
Age: 33, Male
Airplane Rating(s): Single-engine land; Multi-engine land
Seat Occupied: Right
Other Aircraft Rating(s): None
Restraint Used: 3-point
Instrument Rating(s): Airplane 
Second Pilot Present: Yes
Instructor Rating(s): Airplane single-engine; Instrument airplane
Toxicology Performed: No
Medical Certification: Class 1 Without waivers/limitations
Last FAA Medical Exam: March 23, 2016
Occupational Pilot: Yes
Last Flight Review or Equivalent: May 1, 2015
Flight Time: (Estimated) 967 hours (Total, all aircraft), 600 hours (Total, this make and model)

Student pilot Information

Certificate: Student
Age: 31,Male
Airplane Rating(s): None 
Seat Occupied: Left
Other Aircraft Rating(s): None
Restraint Used: 3-point
Instrument Rating(s): None
Second Pilot Present: Yes
Instructor Rating(s): None 
Toxicology Performed: No
Medical Certification: Class 3 Without waivers/limitations
Last FAA Medical Exam: July 11, 2016
Occupational Pilot: No 
Last Flight Review or Equivalent:
Flight Time: (Estimated) 10 hours (Total, all aircraft), 10 hours (Total, this make and model)

Aircraft and Owner/Operator Information

Aircraft Make: Cessna 
Registration: N52950
Model/Series: 172P 
Aircraft Category: Airplane
Year of Manufacture: 1981
Amateur Built:
Airworthiness Certificate: Normal 
Serial Number: 17274642
Landing Gear Type: Tricycle 
Seats: 4
Date/Type of Last Inspection: August 19, 2016 Annual 
Certified Max Gross Wt.: 2400 lbs
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time:
Engine Manufacturer: LYCOMING
ELT: Installed, not activated 
Engine Model/Series: O-320
Registered Owner:
Rated Power: 180 Horsepower
Operating Certificate(s) Held: None

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual (VMC)
Condition of Light: Day
Observation Facility, Elevation: PAMR,138 ft msl 
Distance from Accident Site: 0 Nautical Miles
Observation Time: 01:53 Local
Direction from Accident Site: 299°
Lowest Cloud Condition: Few / 4900 ft AGL
Visibility: 10 miles
Lowest Ceiling: Overcast / 6500 ft AGL
Visibility (RVR):
Wind Speed/Gusts: 3 knots /
Turbulence Type Forecast/Actual:  / None
Wind Direction: 20°
Turbulence Severity Forecast/Actual:  / N/A
Altimeter Setting: 30.02 inches Hg 
Temperature/Dew Point: 19°C / 12°C
Precipitation and Obscuration: Light - None - Rain
Departure Point: Anchorage, AK (MRI)
Type of Flight Plan Filed: None
Destination: Anchorage, AK (MRI)
Type of Clearance: None
Departure Time:
Type of Airspace: Class D

Airport Information

Runway Surface Type:
Airport Elevation: 137 ft msl 
Runway Surface Condition: Dry
Runway Used: 
IFR Approach: None
Runway Length/Width:
VFR Approach/Landing: None

Wreckage and Impact Information

Crew Injuries: 2 None
Aircraft Damage: Substantial
Passenger Injuries:
Aircraft Fire: None
Ground Injuries: N/A 
Aircraft Explosion: None
Total Injuries: 2 None
Latitude, Longitude: 61.213054,-149.839996 (est)

1 comment:

  1. Part time central Florida resident here. Sinkholes are not something to ignore. They have swallowed entire homes taking occupants with them to never be found, and in the case of a 1981 Orlando area event, part of a Porsche dealership: https://www.hemmings.com/stories/2014/02/12/sinkhole-81-the-day-the-earth-swallowed-five-porsches

    They were lucky. An 18ft deep, 40ft diameter sinkhole could have easily swallowed this Skyhawk whole. What the hell was airport management thinking as they apparently had them before?