- Date
- August 7, 1992, 13:50 local (18:50 UTC)
- Place
- Winner, SD
- Injuries
- 3 minor
- Damage
- Substantial damage
- Phase of flight
- Approach
- Aircraft
- N30MTRockwell 112TC
- Weather
- Visual (VMC) · Day
- Status
- Completed · report May 8, 1993
- Report
- Approved by Office Director
- Safety recommendations
- Yes
- FAA report
- 19920807029879A
- Case key
- 15512
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
Failure of the carburetor mixture control, resulting in loss of engine power. A factor related to the accident was: lack of compliance with marvel-schebler service bulletin (sb) #A1-78.
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
Drg a lndg go-around, the eng bgn running rough, then lost pwr. An attempt was made to make an emerg lndg on a road adjacent to the arpt, but the acft hit a fence & an embankment before reaching it. An inv revealed the loss of power was due to a malfunction of the eng's marvel-schebler model HA-6 carburetor (carb). Excessive wear of the shaft retaining screw allowed mispositioning of the carb's rotary mixture control (pn 242-541) and blockage of fuel flow. In sep 78, marvel-schebler/tillotson (original manufacturer of the carb) issued svc bulletin (sb) #A1-78, but it had not been accomplished. The sb provides for instln of a spring retainer (pn 55-A239) to counteract end-play wear on the mixture control assembly & retaining screw due to vibration. The spring retainer also serves as an adnl means of retaining the rotary mixture control, even if the existing shaft retaining screw is worn or bkn. The eng had a total flt time of 1065 hrs & 27 hrs since the last inspn.
Aircraft
- Registration
- N30MT
- Reported as
- Rockwell 112TC
- Category
- Airplane
- Serial number
- 13021
- Airframe hours
- 1,065
- Engine
- Lycoming IO-360, 210 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Operator
- Duane T. Brooks
- Registered owner
- Duane T. Brooks
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · June 1, 1992 · 27 hours before
- Departed
- BIE · Beatrice, NE
- Destination
- SD39 · Winner, SD
- Flight plan
- IFR
- Airport
- SD39 · Bob Wiley Field, runway 13, 3,900 × 75 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
- 53
- Certificate
- Commercial
- Airplane ratings
- Multi-engine land, Single-engine sea, Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 3, Valid Medical--w/ waivers/lim
- Seat
- Left
- Flight hours
- 3,181 total · 715 in this make and model · 3,053 as pilot in command · 42 in the last 90 days · 34 in the last 30 days · 2 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 240° at 4 knots
- Visibility
- 20 statute miles
- Lowest ceiling
- 2,000 ft broken
- Temperature
- 75 °F, dew point 70 °F
- Altimeter
- 29.00 inHg
- Observed at
- PIR, 63 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.