Saturday, January 18, 2020

Loss of Engine Power (Partial): Piper PA-30 Twin Comanche, N7981Y; accident occurred July 17, 2014 at Othello Municipal Airport (S70), Adams County, Washington

Right wing damage
 Federal Aviation Administration

Left Wing damage
Federal Aviation Administration

Left Engine
Federal Aviation Administration

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Spokane, Washington

Aviation Accident Factual Report - National Transportation Safety Board:

Investigation Docket - National Transportation Safety Board:

Location: Othello, WA
Accident Number: WPR14LA298
Date & Time: 07/17/2014, 1515 PDT
Registration: N7981Y
Aircraft: PIPER PA 30
Aircraft Damage: Substantial
Defining Event: Loss of engine power (partial)
Injuries: 4 None
Flight Conducted Under: Part 91: General Aviation - Personal

On July 17, about 1515 Pacific daylight time, a Piper PA-30 twin-engine airplane, N7981Y, was substantially damaged following a partial loss of power on the left engine, and a collision with terrain during takeoff/initial climb at the Othello Municipal Airport, Othello, Washington. The private pilot and the three passengers were not injured. The airplane was registered to Warden Air, LLC and operated by the pilot as a Title 14 Code of Federal Regulations Part 91 personal flight. An instrument flight rules (IFR) flight plan was filed for the cross-country flight. The airplane was departing at the time and was destined for Klamath Falls, Oregon.

The pilot reported that during the power up for takeoff, the left engine revolutions per minute (RPM) was 2,200 while the right engine was 2,600 RPM. He leaned the mixture on the left engine to bring the RPM up to 2,600 and proceeded with the takeoff. After the takeoff roll he initiated a climb and noted that the exhaust gas temperature (EGT) on the left engine was much higher than the EGT of the right engine. The left engine RPM suddenly dropped to 2,000 RPM and the airplane yawed to the left and started to descend. The pilot was unable to overcome the yaw and descent, and the airplane impacted the ground.

The pilot reported that he should not have leaned the left engine for takeoff.

A review of the left engine's logbook revealed a logbook entry dated March 21, 2014 indicating that the fuel flow divider had been removed, repaired, and reinstalled. The fuel servo and turbocharger had also been removed, repaired, and reinstalled. The entry also noted that a flow test was performed, the engine was run tested and checked for leaks, and returned to service. The pilot did not provide the time the airplane had flown since the maintenance work was completed.

The NTSB did not respond to the accident site and the wreckage was retained by the insurance company. Prior to examination, the wreckage and engines were sold for salvage and no longer available for examination. 

Pilot Information

Certificate: Private
Age: 45
Airplane Rating(s): Multi-engine Land; Single-engine Land
Seat Occupied: Left
Other Aircraft Rating(s):None 
Restraint Used:
Instrument Rating(s): Airplane
Second Pilot Present: No
Instructor Rating(s): None
Toxicology Performed: No
Medical Certification: Class 3 Without Waivers/Limitations
Last FAA Medical Exam: 02/26/2013
Occupational Pilot: No
Last Flight Review or Equivalent: 02/15/2013
Flight Time:  756 hours (Total, all aircraft), 82 hours (Total, this make and model), 681 hours (Pilot In Command, all aircraft), 18 hours (Last 90 days, all aircraft), 1 hours (Last 30 days, all aircraft), 0 hours (Last 24 hours, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Make: PIPER
Registration: N7981Y
Model/Series: PA 30 NO SERIES
Aircraft Category: Airplane
Year of Manufacture: 1966
Amateur Built: No
Airworthiness Certificate: Normal
Serial Number: 30-1082
Landing Gear Type: Retractable - Tricycle
Seats: 4
Date/Type of Last Inspection:  Annual
Certified Max Gross Wt.: 2381 lbs
Time Since Last Inspection:
Engines: 2 Reciprocating
Airframe Total Time:
Engine Manufacturer: LYCOMING
ELT: Installed, activated, did not aid in locating accident
Engine Model/Series: IO-320 SERIES
Registered Owner: WARDEN AIR LLC
Rated Power: 160 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: KMWH, 1188 ft msl
Distance from Accident Site: 27 Nautical Miles
Observation Time:
Direction from Accident Site: 322°
Lowest Cloud Condition: Clear
Visibility:  10 Miles
Lowest Ceiling: None
Visibility (RVR):
Wind Speed/Gusts: 10 knots /
Turbulence Type Forecast/Actual:
Wind Direction: Variable
Turbulence Severity Forecast/Actual:
Altimeter Setting: 29.8 inches Hg
Temperature/Dew Point: 34°C
Precipitation and Obscuration:
Departure Point: Othello, WA (S70)
Type of Flight Plan Filed:IFR
Destination: Klamath Falls, OR (KLMT)
Type of Clearance: None
Departure Time: 1525 PDT
Type of Airspace:Class G 

Airport Information

Airport: Othello Municipal (S70)
Runway Surface Type: Asphalt
Airport Elevation: 1149 ft
Runway Surface Condition: Dry
Runway Used: 25
IFR Approach: None
Runway Length/Width: 4000 ft / 75 ft
VFR Approach/Landing: None

Wreckage and Impact Information

Crew Injuries: 1 None
Aircraft Damage: Substantial
Passenger Injuries: 3 None
Aircraft Fire: None
Ground Injuries: N/A
Aircraft Explosion: None
Total Injuries: 4 None
Latitude, Longitude: 47.316667, -119.133333

No comments:

Post a Comment