FTW88DPJ07

NTSB accident investigation · Northrop C-125A · Tulsa, OK · June 29, 1988

Accident · Minor injuriesFinal report
Date
June 29, 1988, 06:25 local (11:25 UTC)
Place
Tulsa, OK
Injuries
2 minor
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N3756QNorthrop C-125A
Weather
Visual (VMC) · Day
Status
Completed · report July 10, 1989
Report
Approved by Office Director
FAA report
19880629027419A
Case key
22457

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Airframe/component/system failure/malfunctionTakeoff - initial climb
Electrical system - corrodedCause
Inadeq substantiation process,inadeq documentationCompany/operator mgmtFactor
Electrical system - deterioratedCause
Propeller system/accessories,reversing system - engagedCause
Procedures/directives - disregardedPilot in commandCause
Operation with known deficiencies in equipment - attemptedPilot in commandCause
Lack of total experience in type of aircraftPilot in commandFactor
Lack of total experience in type of aircraftCopilot/second pilotFactor
Forced landingDescent - emergency
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The pilot did not hold a type rating or written authorization to act as pilot in command. The co-pilot did not hold a type rating or written authorization to act as second in command and his medical had expired. The aircraft did not have an airworthiness certificate nor had a special flight permit been issued. The left propeller went into reverse during the initial climb due to corrosion and deterioration of the wiring that controlled the propeller. The acft crashed out of control after colliding with power lines during takeoff. It struck the ground and went thru a fence then down a slope and over an embankment. The acft then bounced across a street while turning around and colliding with a power line pole tail first. The acft had traveled about 537 ft from initial ground contact. All 3 engines were still producing power when the acft came to rest.

Aircraft

Registration
N3756Q
Reported as
Northrop C-125A
Category
Airplane
Serial number
48-634
Engine
Wright R-1820-202A, 1,275 horsepower, reciprocating
Damage
Substantial damage
Fire
On-Ground
Flight
Business · Part 91
Registered owner
Darryl G. Greenamyer, Inc.
Last inspection
Unknown · May 2, 1988 · 56 hours before
Departed
TUL
Destination
FOF · Dayton, OH
Flight plan
VFR
Airport
TUL · Tulsa International, runway 26, 7,700 × 150 ft, asphalt

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
51
Certificate
Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
6,274 total · 56 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
160° at 6 knots
Visibility
15 statute miles
Lowest ceiling
7,000 ft broken
Temperature
75 °F
Altimeter
29.00 inHg
Observed at
TUL, 1 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.