ASN Wikibase Occurrence # 280499
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| Date: | Monday 18 July 2022 |
| Time: | 11:00 LT |
| Type: |  Rockwell Commander 112 |
| Owner/operator: | Private |
| Registration: | N1181J |
| MSN: | 181 |
| Year of manufacture: | 1974 |
| Total airframe hrs: | 3565 hours |
| Engine model: | Lycoming IO-360-C1D6 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | near Granbury Regional Airport (GDJ/KGDJ), Granbury, TX -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Granbury Regional Airport, TX (KGDJ) |
| Granbury Regional Airport, TX (KGDJ) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot stated that he performed a new engine run-up on the day of the accident. He stated that after he conducted a preflight inspection of the airplane, he taxied and performed multiple engine run-ups. He then shut down the engine and added fuel. The pilot started the engine and performed multiple engine run-ups both before and after taxiing to the runway with no engine anomalies noted. After takeoff, the engine sustained a loss of power while climbing through about 100 ft above ground level. The pilot performed a forced landing to a road, during which the airplane sustained substantial damage to the fuselage.
Postaccident examination of the airplane revealed one of the airbox's three aluminum spacers was missing. Pieces of the spacer were found in cylinder Nos. 1 and 2 with additional material within the No 1 spark plug lead. The cylinders exhibited pitting damage from the spacer. It is likely that the metallic pieces within the engine cylinder shorted the engine ignition, thus reducing and/or ceasing engine power production on those cylinders. An examination of the remaining engine and systems revealed no anomalies that would have precluded normal operations.
The accident occurred on the first flight following an annual inspection and engine installation following a propeller strike inspection. Investigators were not able to determine how the spacer was introduced to the cylinder.
Probable Cause: The loss of engine power due to metal contamination within the cylinder following poor maintenance.
Accident investigation:
 |
|
Sources:
NTSB CEN22LA322
FAA register: https://registry.faa.gov/aircraftinquiry/Search/NNumberResult?nNumberTxt=1181J
Location
Images:
Photo: FAA
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 18-Jul-2022 20:43 | Geno | Added |
| 19-Jul-2022 00:02 | johnwg | Updated [Time, Total occupants, Location, Phase, Nature, Departure airport, Source, Narrative, Category] |
| 19-Jul-2022 05:42 | AgOps | Updated [Source, Category] |
| 19-Jul-2022 08:04 | RobertMB | Updated [Aircraft type, Phase, Nature, Source, Narrative] |
| 19-Jul-2022 18:53 | johnwg | Updated [Time, Total occupants, Location, Phase, Departure airport, Source, Narrative, Category] |
| 22-Jul-2022 03:00 | Captain Adam | Updated [Source, Narrative] |
| 18-Aug-2022 22:58 | Captain Adam | Updated [Time, Phase, Destination airport, Source, Narrative] |
| 04-Apr-2024 09:57 | ASN Update Bot | Updated [Time, Operator, Total occupants, Other fatalities, Phase, Source, Narrative, Accident report] |
| 04-Apr-2024 10:00 | ASN | Updated [Operator, Source, Narrative, Photo] |
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