# NTSB ATL88FA155: Cessna 150L, N1491Q, Knoxville, TN, April 25, 1988

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Field investigation · Final report
- Date: April 25, 1988, 15:00 local (19:00 UTC)
- Place: Knoxville, TN
- Location: 35.9606° N, 83.9207° W: Placed by OpenAirDocs: center of Knoxville, TN, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=35.9606&lon=-83.9207&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 2 serious
- Status: Completed, report August 8, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 7600
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL88FA155
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/7600/pdf
- Page: https://openairdocs.org/ntsb/ATL88FA155

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of engine power(total) - mech failure/malf, takeoff - initial climb
  - engine assembly,rocker arm/tappet - fractured (cause)
  - maintenance,annual inspection - inadequate, other maintenance personnel (contributing factor)
  - exhaust system,manifold/pipe - loose
  - maintenance,overhaul,major - improper, other maintenance personnel (contributing factor)
- Forced landing, descent - emergency
- In flight collision with terrain/water, descent - emergency
  - object - tree(s)

## Aircraft

- Registration: [N1491Q](https://openairdocs.org/deregistered/N1491Q-1992-10-27), registration cancelled 1992-10-27, S/N 15072791 (OpenAirDocs)
- Reported make and model: CESSNA 150L
- Registry model: [Cessna 150L](https://openairdocs.org/model/cessna-150l) (registry code 2071826) (OpenAirDocs)
- Category: Airplane
- Serial number: 15072791
- Airframe hours: 1943
- Engines: CONTINENTAL O-200-A 100 horsepower reciprocating
- Damage: Destroyed
- Flight: Instructional, Part 91
- Registered owner: Little Creek School
- Airworthiness certificate: Standard, Utility
- Last inspection: Annual, January 10, 1988, 23 hours before
- Departed: TN04, KNOXVILLE, TN
- Airport: TN04, Little Creek, runway 22, 2,100 × 116 ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 44; flight instructor, commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: right; flight hours: 2,127 total, 1,021 in this make and model, 1,879 as pilot in command, 17 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 30° at 8 knots
- Visibility: 15 statute miles
- Lowest ceiling: 9,000 ft broken
- Temperature: 64 °F, dew point 41 °F
- Altimeter: 29.00 inHg
- Observed at: TYS, 4 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 (OpenAirDocs).

- [Accident 19880425009909A](https://openairdocs.org/incident/19880425009909A), Apr 25, 1988: Cessna STC150, Knoxville, TN, Destroyed. Engine quit on climbout. Crashed in trees. Rocker arm boss and pin had failed from fatigue. Poor engine maintenance

## Other investigations on N1491Q (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB CHI72FEC49](https://openairdocs.org/ntsb/CHI72FEC49), Jun 27, 1972: Cessna 150 (N1491Q), Petersburg, MI, substantial damage

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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