Wednesday, February 28, 2018

Piper PA-22-150, N1737P: Accident occurred July 01, 2017 at Mammoth Yosemite Airport (KMMH), Mono County, California

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Reno, Nevada

Aviation Accident Final Report - National Transportation Safety Board:

Investigation Docket - National Transportation Safety Board:

Location: Mammoth Lakes, CA
Accident Number: GAA17CA377
Date & Time: 07/01/2017, 1230 PDT
Registration: N1737P
Aircraft: PIPER PA 22-150
Aircraft Damage: Substantial
Defining Event: Loss of control on ground
Injuries: 3 None
Flight Conducted Under: Part 91: General Aviation - Personal 


During the landing roll, the tailwheel-equipped airplane veered off the runway to the left, the right main landing gear collapsed, and the right wing impacted the ground.

The airplane sustained substantial damage to the fuselage.

The pilot did not report that there were any preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.

The pilot failed to submit the NTSB Pilot/ Operator Aircraft Accident/ Incident Report Form 6120.1. 

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
The pilot's failure to maintain directional control during the landing roll.


Directional control - Not attained/maintained (Cause)

Personnel issues
Aircraft control - Pilot (Cause)

Factual Information

History of Flight

Loss of control on ground (Defining event)
Runway excursion
Landing gear collapse

Pilot Information

Certificate: Private
Age: 44, Male
Airplane Rating(s): Single-engine Land
Seat Occupied: Unknown
Other Aircraft Rating(s): None
Restraint Used: Unknown
Instrument Rating(s): None
Second Pilot Present: No
Instructor Rating(s): None
Toxicology Performed: No
Medical Certification: Class 2 With Waivers/Limitations
Last FAA Medical Exam: 02/15/2017
Occupational Pilot: No
Last Flight Review or Equivalent: Flight Time: 

Aircraft and Owner/Operator Information

Aircraft Manufacturer: PIPER
Registration: N1737P
Model/Series: PA 22-150
Aircraft Category: Airplane
Year of Manufacture:
Amateur Built: No
Airworthiness Certificate: Normal
Serial Number: 22-2527
Landing Gear Type: Tailwheel
Seats: 2
Date/Type of Last Inspection: Unknown
Certified Max Gross Wt.: 2000 lbs
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time:
Engine Manufacturer: LYCOMING
Engine Model/Series: O-320 SERIES
Registered Owner: On file
Rated Power: hp
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: KMMH, 7128 ft msl
Observation Time: 1915 UTC
Distance from Accident Site: 1 Nautical Miles
Direction from Accident Site: 314°
Lowest Cloud Condition: Clear
Temperature/Dew Point: 28°C / -3°C
Lowest Ceiling: None
Visibility:  10 Miles
Wind Speed/Gusts, Direction: 9 knots, 110°
Visibility (RVR):
Altimeter Setting: 30.15 inches Hg
Visibility (RVV):
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point:
Type of Flight Plan Filed:  Unknown
Destination: Mammoth Lakes, CA (MMH)
Type of Clearance: Unknown
Departure Time:
Type of Airspace: Class E 

Airport Information

Runway Surface Type: Asphalt
Airport Elevation: 7134 ft
Runway Surface Condition: Unknown
Runway Used: 09
IFR Approach: None
Runway Length/Width: 7000 ft / 100 ft
VFR Approach/Landing: Full Stop 

Wreckage and Impact Information

Crew Injuries: 1 None
Aircraft Damage: Substantial
Passenger Injuries: 2 None
Aircraft Fire: None
Ground Injuries: N/A
Aircraft Explosion: None
Total Injuries: 3 None
Latitude, Longitude:  37.624444, -118.838889 (est)

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