# NTSB investigations: Cessna 172N: Powerplant sys/comp malf/fail

NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports.

## Latest cases

- [NTSB WPR24LA229](https://openairdocs.org/ntsb/WPR24LA229.md): Cessna 172N · San Diego, CA · Accident · Minor injuries · Class 3 · Limited · Final report · Jul 2, 2024 · N74C · Substantial damage
  > A failure of the No. 2 cylinder due to fatigue cracking as the result of an undersized fillet radius around the edge of the cylinder head dome.
- [NTSB CEN23LA188](https://openairdocs.org/ntsb/CEN23LA188.md): Cessna 172 · Flower Mound, TX · Accident · No injuries · Class 3 · Limited · Final report · May 17, 2023 · N5550J · Substantial damage
  > The fatigue failure of the rocker arm which resulted in a partial loss of engine power. Contributing was the airplane operator’s failure to inspect the rocker arm in accordance with the engine manufacturer’s service bulletin.
- [NTSB WPR19LA092](https://openairdocs.org/ntsb/WPR19LA092.md): Cessna 172 · Melba, ID · Accident · No injuries · Class 3 · Limited · Final report · Mar 1, 2019 · N6486J · Substantial damage
  > The total loss of engine power due to a separated carburetor idle mixture adjustment screw and spring assembly for reasons that could not be determined.
- [NTSB ERA19LA079](https://openairdocs.org/ntsb/ERA19LA079.md): Cessna 172 · Fort Lauderdale, FL · Accident · No injuries · Limited investigation · Final report · Dec 24, 2018 · N3015E · Substantial damage
  > A total loss of engine power due to the fatigue fracture of the No. 2 exhaust rocker arm stud.
- [NTSB ANC18LA011](https://openairdocs.org/ntsb/ANC18LA011.md): Cessna 172 · Oloh, MS · Accident · Minor injuries · Limited investigation · Final report · Nov 25, 2017 · N739KW · Substantial damage
  > A partial loss of engine power due to the failure of the No. 3 valve key (exhaust).
- [NTSB CEN14LA374](https://openairdocs.org/ntsb/CEN14LA374.md): Cessna 172N · Rockville, IN · Accident · No injuries · Limited investigation · Final report · Jul 16, 2014 · N13SK · Substantial damage
  > A partial loss of engine power due to a failure of the dual magneto system. Contributing to the accident was the improper maintenance of the duel magneto system.
- [NTSB WPR12LA306](https://openairdocs.org/ntsb/WPR12LA306.md): Cessna 172N · Rockford, ID · Accident · No injuries · Limited investigation · Final report · Jul 16, 2012 · N5204K · Substantial damage
  > A partial loss of engine power during cruise flight due to the failure of the No. 3 cylinder exhaust valve for reasons that could not be determined due to the damage to the valve head and the missing valve stem. Contributing to the accident was the flight…
- [NTSB CEN11LA413](https://openairdocs.org/ntsb/CEN11LA413.md): Cessna 172N · Bedford Park, IL · Accident · No injuries · Limited investigation · Final report · Jun 18, 2011 · N172NT · Substantial damage
  > A loss of engine power due to a fractured push rod precipitated by a stuck exhaust valve.
- [NTSB CEN10LA123](https://openairdocs.org/ntsb/CEN10LA123.md): Cessna 172N · Genoa City, WI · Accident · Minor injuries · Limited investigation · Final report · Feb 14, 2010 · N24CV · Substantial damage
  > A total loss of engine power due to the failure of the bolts that held in place the connecting rods to the engine's No. 3 and No. 4 cylinders as a result of the engine overhaul facility's improper installation of the bolts during a recent overhaul.
- [NTSB ERA09LA399](https://openairdocs.org/ntsb/ERA09LA399.md): Cessna 172N · Rochester, MA · Accident · No injuries · Limited investigation · Final report · Jul 12, 2009 · N4773G · Substantial damage
  > An engine vibration as reported by the pilot, for undetermined reasons.
- [NTSB CHI08CA139](https://openairdocs.org/ntsb/CHI08CA139.md): Cessna 172N · Blue Ash, OH · Accident · No injuries · Data collection · Final report · May 24, 2008 · N75528 · Substantial damage
  > The separation of the throttle cable from the linkage during the approach to land and the altitude/clearance not being available to the pilot during the forced landing. Contributing to the accident was the electrical wires the airplane impacted.

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1
WHERE c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('2072434')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s.case_mkey = x.case_mkey AND s.aircrafts_position = x.position AND s."tier2Number" = '340' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent")))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/340/sequence?model=2072434

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