- Date
- June 5, 1987, 09:45 local (14:45 UTC)
- Place
- Keokuk, IA
- Injuries
- 1 serious, 1 minor
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N7973DBeech B35
- Weather
- Visual (VMC) · Day
- Status
- Completed · report November 29, 1988
- Report
- Approved by Office Director
- FAA report
- 19870605019029A
- Case key
- 34396
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 PIC rptd a loss of manifold press during cruise flt and an inability to maintain alt. A forced lndg was made to the Keokuk arpt, but the PIC stated he was too high and fast for a lndg. The PIC made a go-around, but again approached too fast. Another attempt was made to go-around, but an increase in throttle produced no add'tl pwr. The PIC then veered towards an open area to attempt a lndg. The acft impacted an area of trees and fell to the grnd. Exam of the aircraft revealed that the throttle arm was slipping over the serrated edges of the throttle body shaft restricting full movement of the throttle shaft. Closeup exam of this arm and shaft revealed that the castelated nut had backed off the bolt allowing the arm to loosen. A cotter pin is normally installed in the area of the castelatted nut to prevent it from backing off the bolt. The bolt and nut were found still positioned on the throttle arm, but the cotter pin was not found.
Aircraft
- Registration
- N7973D
- Reported as
- Beech B35
- Category
- Airplane
- Serial number
- 5233
- Airframe hours
- 3,900
- Engine
- Continental O-470, 250 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Registered owner
- George J. Zimmer
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · December 1, 1986 · 49 hours before
- Departed
- MUT · Muscatine, IA
- Destination
- Houston, TX
- Airport
- EOK · Keokuk Municipal, runway 31, 3,800 × 100 ft, grass/turf
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
- 62
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Medical
- Class 3, Valid Medical--w/ waivers/lim
- Seat
- Left
- Flight hours
- 1,598 total · 609 in this make and model · 15 in the last 90 days · 1 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Visibility
- 15 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.
Other investigations on N7973D · 1
Matched to the same aircraft by N-number and date.