DEN89IA028

NTSB incident investigation · Beech S-35 · Matheson, CO · November 3, 1988

Incident · No injuriesIncident investigationFinal report
Date
November 3, 1988, 14:00 local (21:00 UTC)
Place
Matheson, CO
Injuries
2 uninjured
Damage
Minor damage
Phase of flight
Enroute
Aircraft
N977KMBeech S-35
Weather
Visual (VMC) · Day
Status
Completed · report June 11, 1990
Report
Approved by Office Director
FAA report
19881103051239I
Case key
17612

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

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/malfunctionCruise - normal
Propeller system/accessories,hub - separationCause
Maintenance,major alteration - not performedOther maintenance personnelCause
Engine assembly - seized
Maintenance,modification - information insufficientOther maintenance personnelFactor
Forced landingDescent - emergency
Gear not extendedLanding - flare/touchdown
Terrain condition - crop

Analysis

The private plt and a friend were enroute for a hunting trip. Thirty miles east of a refueling stop, the pilot heard a loud knock. Oil covered the windscreen and the engine seized. The plt looked out the side window vent to select a forced landing area. A wheels up landing was performed in a grain field. After exiting the acft, the plt saw that the propeller was missing. Damage was reported as substantial, but a post incident inspection revealed minor damage. The propeller was not found but two sheared propeller bolts, p/n A-2040 were found in the cowling. In a phone conversation, a hartzell technical representative, said the proper bolt for this installation is p/n A-1328-1. He said p/n A-2040 was superseded prior to 1970. Log books show this propeller was overhauled 83 flight hrs prior to this incident. The repair shop reported that the bolts they removed were inspected and re-installed in the hub.

Aircraft

Registration
N977KM
Reported as
Beech S-35
Category
Airplane
Serial number
D 7366
Airframe hours
2,905
Engine
Continental IO-520-BA, 285 horsepower, reciprocating
Damage
Minor damage
Flight
Personal · Part 91
Registered owner
Grant B. Kelley
Airworthiness certificate
Standard, Normal
Last inspection
Annual · August 8, 1988 · 130 hours before
Departed
MKC · Kansas City, MO
Destination
OOV · Falcon, CO

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
28
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
433 total · 373 in this make and model · 399 as pilot in command · 96 in the last 90 days · 44 in the last 30 days · 6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
360° at 15 knots
Visibility
20 statute miles

FAA reports on this event · 1

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