- Date
- April 29, 1983, 14:05 local (21:05 UTC)
- Place
- Renton, WA
- Injuries
- 2 fatal
- Damage
- Destroyed
- Phase of flight
- Initial climb
- Aircraft
- N67140Beech 77
- Weather
- Visual (VMC) · Day
- Status
- Completed
- Report
- Approved by Office Director
- FAA report
- 19830429016759A
- Case key
- 39607
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.
Analysis
The acft was taking off for a 1 hour engine run-in following a top overhaul. After liftoff the engine began a gradual power loss and rough running. The pilot was trying turning back to the runway to land when total power loss occurred. The acft had turned 45 degrees when the nose fell through, the wings rotated 180 degrees to the left and the acft impacted nose first on the runway. The mechanic who performed the removal and reinstallation of the cylinders for the top overhaul was occupying the left seat. The maintenance supervisor was the pilot-in-command in the right seat. The locking nut on the #1 cylinder exhaust valve adjusting screw was found loose and the adjusting screw had backed out of the rocker arm by pushrod action during takeoff, negating rocker arm action and exhaust valve opening. The locking nuts for all of the other valve adjusting screws were found properly torqued.
Aircraft
- Registration
- N67140
- Reported as
- Beech 77
- Category
- Airplane
- Serial number
- WA66
- Airframe hours
- 679
- Engine
- Lycoming O-235-L2C, 115 horsepower, reciprocating
- Damage
- Destroyed
- Flight
- Part 91
- Operator
- Fancher Flyways
- Registered owner
- Mcewen Thomas Kenneth
- Airworthiness certificate
- Standard, Utility
- Last inspection
- Annual · December 3, 1982 · 103 hours before
- Airport
- RNT · Renton, runway 15, 5,379 × 200 ft, concrete
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
- 26
- Certificates
- Commercial, Flight instructor
- Airplane ratings
- Single-engine land, Multi-engine land
- Instrument ratings
- Airplane
- Medical
- Class 2, Valid Medical--w/ waivers/lim
- Seat
- Right
- Toxicology
- Performed
- Flight hours
- 473 total · 7 in this make and model · 346 as pilot in command · 168 in the last 90 days · 145 in the last 30 days · 3 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 150° at 10 knots
- Visibility
- 20 statute miles
- Lowest ceiling
- None
- Temperature
- 64 °F, dew point 52 °F
- Altimeter
- 29.00 inHg
- Observed at
- RNT
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.