- Date
- January 26, 1987, 19:45 local (Jan 27, 1987, 00:45 UTC)
- Place
- Madison, IN
- Injuries
- 2 uninjured
- Damage
- Substantial damage
- Phase of flight
- Initial climb
- Aircraft
- N4688DCessna 172N
- Weather
- Visual (VMC) · Night/dark
- Status
- Completed · report July 5, 1988
- Report
- Approved by Office Director
- FAA report
- 19870126001019A
- Case key
- 13722
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
At aprx 2500 MSL, the eng stopped and attempts to restart it were not successful. The instructor took control of the acft and attempted to land on the highway, but the acft struck powerlines and a telephone pole before nosing over and coming to rest. The eng was removed from the acft and subsequent teardown revealed that the crankshaft gear teeth were sheared. Aprx 140 hrs prior to the accident, a repair station had re-nitrided the crankshaft following re-grinding operations, however, the pressed on type gear was not removed, as required, prior to re-nitriding. Specifications state that the gear should have a min rockwell hardness of 30N-77 and that any temp in excess of 300 degrees f would affect the hardness. When tested, the gear exhibited a rockwell hardness of 30N-39. The temp required for nitriding is in excess of 985 degrees f.
Aircraft
- Registration
- N4688D
- Reported as
- Cessna 172N
- Category
- Airplane
- Serial number
- 17272331
- Airframe hours
- 1,537
- Engine
- Lycoming O-320-H2AD, 160 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Instructional · Part 91
- Operator
- H.F.G., Inc.
- Registered owner
- Norman J. Carroll
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · March 20, 1986 · 42 hours before
- Departed
- IMS · Madison, IN
- Airport
- IM5 · Madison Municipal
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
- Certificates
- Flight instructor, Airline transport
- Airplane ratings
- Multi-engine land, Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 2, Valid Medical--w/ waivers/lim
- Seat
- Right
- Flight hours
- 17,260 total · 105 in this make and model · 15,559 as pilot in command · 200 in the last 90 days · 2 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Night/dark
- Wind
- 350° at 6 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 19 °F, dew point 10 °F
- Altimeter
- 30.00 inHg
- Observed at
- LOU, 38 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.
Other investigations on N4688D · 1
Matched to the same aircraft by N-number and date.