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20130318003459A

Accident · Substantial damage
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FAA accident report · Piper PA-23-250 · Hillsboro, OR · March 18, 2013

FAA Aviation Safety Information Portal

© OpenStreetMap
Date
March 18, 2013 · 14:15 local
Place
Hillsboro, OR
Airport
Twin Oaks Airpark
Phase of flight
Takeoff: Departure Roll
Operating rules
General operating rules (Part 91)
Damage
Substantial damage
Aircraft
N318CA
NTSB investigation
NTSBWPR13LA154
Reported as
Piper PA-23-250
Reported engine
Lycoming TI0-540 series
People aboard
2
Fatal injuries
0
Other injuries
0
Pilot’s certificates
Airline transport, flight instructor
Pilot’s flight hours
9,368 total5 in this make and model66 in the last 90 days
N318CARegistration cancelled Sep 5, 2014 · Piper PA-23-250S/N 27-2908 · Built 1965Airframe modelPiper PA-23-250Engine modelLycoming TI0-540 seriesTurbo-prop

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

On March 18, 2013, at approximately 14:30 (2130 z), a Piper aztec PA-23-250, N318CA, went off the end of runway 20 at Twin Oaks Airpark in Hillsboro, OR.

This flight was to be the student private pilot?s first training flight in a Twin engine aircraft. His flight instructor performed a pre-flight safety brief including engine failure and procedures should the door become unsecure during the take-off roll.

Normal engine run ups and taxi to runway 20, including a brake function check, were performed, with no discrepancies noted.

The take-off proceeded normally until the cabin door became unlatched at approximately 1/3 down the runway, by CFI?s recollection, and between 80 and 85 miles per hour, at which time she called ?abort?. The student pilot immediately pulled the power off and began braking.

The runway length from threshold to threshold is 2225 feet. Witnesses described hearing the power come off and turning to look at the aircraft as it began braking. They described the location of the aircraft as approximately 700-800 feet down the runway at that time, with approximately 1400-1500 feet remaining to the beginning of the over-run. The entire runway 20 is downhill, 151 feet elevation to 141 feet elevation, threshold to threshold. From beginning of the southern overrun, it is even more pronounced. 141 feet elevation to 115 in a distance of only 171 feet, to the end of the hard top. (Distance and elevation data derived from google earth).

Student pilot stated that he was ?standing on? The brakes (there are no brake pedals on the right side at CFI?s crew position). He felt that the brakes were effective at the beginning of the de-acceleration, but felt effectiveness fade the longer he applied them. Brake fade would be typical as the brakes began to overheat. Visual inspection of the brake assemblies post accident reveilled no anomilalies.

No attempt was made to turn . One witness stated that it appeared that the brakes never ?locked up? And no skid marks that could be attributed to the accident were noted. Once the aircraft left the black top, it dropped off a ten foot sloped embankment, coming to rest approximately 57 feet off the black top. The aircraft was substantially damaged.

Damage to the aircraft included all three landing gear legs folded or bent aft, the nose wheel bay was crushed, both wings were bent forward and the training edges pulled away from the fuselage. The fuselage was wrinkled at the forward spar attach point. Both propellers had one bent blade.

As the FAA filed it

ON MARCH 18, 2013, AT APPROXIMATELY 14:30 (2130 Z), A PIPER AZTEC PA-23-250, N318CA, WENT OFF THE END OF RUNWAY 20 AT TWIN OAKS AIRPARK IN HILLSBORO, OR.

THIS FLIGHT WAS TO BE THE STUDENT PRIVATE PILOT?S FIRST TRAINING FLIGHT IN A TWIN ENGINE AIRCRAFT. HIS FLIGHT INSTRUCTOR PERFORMED A PRE-FLIGHT SAFETY BRIEF INCLUDING ENGINE FAILURE AND PROCEDURES SHOULD THE DOOR BECOME UNSECURE DURING THE TAKE-OFF ROLL.

NORMAL ENGINE RUN UPS AND TAXI TO RUNWAY 20, INCLUDING A BRAKE FUNCTION CHECK, WERE PERFORMED, WITH NO DISCREPANCIES NOTED.

THE TAKE-OFF PROCEEDED NORMALLY UNTIL THE CABIN DOOR BECAME UNLATCHED AT APPROXIMATELY 1/3 DOWN THE RUNWAY, BY CFI?S RECOLLECTION, AND BETWEEN 80 AND 85 MILES PER HOUR, AT WHICH TIME SHE CALLED ?ABORT?. THE STUDENT PILOT IMMEDIATELY PULLED THE POWER OFF AND BEGAN BRAKING.

THE RUNWAY LENGTH FROM THRESHOLD TO THRESHOLD IS 2225 FEET. WITNESSES DESCRIBED HEARING THE POWER COME OFF AND TURNING TO LOOK AT THE AIRCRAFT AS IT BEGAN BRAKING. THEY DESCRIBED THE LOCATION OF THE AIRCRAFT AS APPROXIMATELY 700-800 FEET DOWN THE RUNWAY AT THAT TIME, WITH APPROXIMATELY 1400-1500 FEET REMAINING TO THE BEGINNING OF THE OVER-RUN. THE ENTIRE RUNWAY 20 IS DOWNHILL, 151 FEET ELEVATION TO 141 FEET ELEVATION, THRESHOLD TO THRESHOLD. FROM BEGINNING OF THE SOUTHERN OVERRUN, IT IS EVEN MORE PRONOUNCED. 141 FEET ELEVATION TO 115 IN A DISTANCE OF ONLY 171 FEET, TO THE END OF THE HARD TOP. (DISTANCE AND ELEVATION DATA DERIVED FROM GOOGLE EARTH).

STUDENT PILOT STATED THAT HE WAS ?STANDING ON? THE BRAKES (THERE ARE NO BRAKE PEDALS ON THE RIGHT SIDE AT CFI?S CREW POSITION). HE FELT THAT THE BRAKES WERE EFFECTIVE AT THE BEGINNING OF THE DE-ACCELERATION, BUT FELT EFFECTIVENESS FADE THE LONGER HE APPLIED THEM. BRAKE FADE WOULD BE TYPICAL AS THE BRAKES BEGAN TO OVERHEAT. VISUAL INSPECTION OF THE BRAKE ASSEMBLIES POST ACCIDENT REVEILLED NO ANOMILALIES.

NO ATTEMPT WAS MADE TO TURN . ONE WITNESS STATED THAT IT APPEARED THAT THE BRAKES NEVER ?LOCKED UP? AND NO SKID MARKS THAT COULD BE ATTRIBUTED TO THE ACCIDENT WERE NOTED. ONCE THE AIRCRAFT LEFT THE BLACK TOP, IT DROPPED OFF A TEN FOOT SLOPED EMBANKMENT, COMING TO REST APPROXIMATELY 57 FEET OFF THE BLACK TOP. THE AIRCRAFT WAS SUBSTANTIALLY DAMAGED.

DAMAGE TO THE AIRCRAFT INCLUDED ALL THREE LANDING GEAR LEGS FOLDED OR BENT AFT, THE NOSE WHEEL BAY WAS CRUSHED, BOTH WINGS WERE BENT FORWARD AND THE TRAINING EDGES PULLED AWAY FROM THE FUSELAGE. THE FUSELAGE WAS WRINKLED AT THE FORWARD SPAR ATTACH POINT. BOTH PROPELLERS HAD ONE BENT BLADE.

NTSB investigation

The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.

NTSB WPR13LA154Accident · No injuriesLimited investigationFinal reportHillsboro, ORA runway overrun due to an insufficient stopping distance due to the downsloping runway during a rejected takeoff. Contributing to the accident was a cabin door that inadvertently opened during the takeoff roll.Mar 18, 2013 · Substantial damage

Other reports on N318CA · 1

Matched to the same aircraft by N-number and date.

Incident 20120529010719ILanding: Approach · Mcminnville, ORAircraft departed twin oaks airpark (7S3) for an instructional flight. While on final approach into mmv, with the left engine simulated out for training purposes, the crew smelled smoke in the cockpit. They continued the descent and the fumes in the cabin…May 29, 2012 · Minor damage