# Incident 20010721032489I: Cessna T206H, Sacramento, CA, July 21, 2001

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: July 21, 2001, 08:00 local time
- Place: Sacramento, CA
- Airport: Mather Afb
- Phase of flight: Normal Cruise
- Operating rules: General operating rules (Part 91)
- Location: 38.5816° N, 121.4944° W: Placed by OpenAirDocs: center of Sacramento, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.5816&lon=-121.4944&mi=10
- Aircraft: N521HP, a cancelled registration (https://openairdocs.org/deregistered/N521HP-2024-08-23) (OpenAirDocs)
- Registry model: Cessna T206H (registry code 2073303, https://openairdocs.org/model/cessna-t206h) (OpenAirDocs)
- Registry engine: Lycoming TIO-540-AJ1A (registry code 42004, https://openairdocs.org/engine/lycoming-tio-540-aj1a) (OpenAirDocs)
- Reported make and model: CESSNA T206H
- Reported engine: LYC TIO540AJ1A
- People aboard: 2
- Fatal injuries: 0
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20010721032489I

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

(-23) N521HP, CESSNA T206H, BEING OPERATED BY THE CALIFORNIA HIGHWAY PATROL, WAS DISPATCHED FROM AUBURN MUNI (AUN) FOR SURVEILLANCE MISSION. AT 4,500 FT. MSL THE PILOT REPORTED A STRANGE "THUMP" FOLLOWED BY AN UNUSUAL VIBRATION. AN EMERGENCY DESCENT WAS ESTABLISHED TO SACRAMENTO MATHER FIELD (MHR). THE ENGINE STOPPED DEVELOPING POWER AND AS THE PILOT FLARED FOR LANDING, THE PROPELLER STOPPED ROTATING. POST LANDING INSPECTION SHOWED THE PROPELLER COULDN'T BE ROTATED MORE THAN A FEW DEGREES. FURTHER INSPECTION SHOWED MUCH METAL IN THE VALVE AREA OF THE NUMBER 5 CYLINDER. THE EXHAUST VALVE WAS ALSO MISSING. THE ENGINE WAS TAGGED BY THIS OFFICE AND SENT TO R.E. NAYLOR AT ANE-MIDO-44 FOR A FAA OBSERVED TEAR DOWN AND INSPECTION BY THE MANUFACTURER. THE RESULTS OF THAT INSPECTION AND THE SUSPECTED CAUSE OF THE FAILURE ARE DETAILED IN R.E. NAYLOR'S REPORT DATED 11/23/2001. A COPY OF THIS REPORT HAS BEEN MADE A PART OF THE OFFICE FILE FOR THIS INCIDENT.

## Other reports on N521HP (1)

Matched to the same aircraft by N-number and date.

- [Incident 20130420006259I](https://openairdocs.org/incident/20130420006259I), Apr 20, 2013: Cessna T206H (N521HP), West Sacramento, CA, No damage. Calififornia highway patrol aircraft which is public use, experienced an engine failure and complete loss of power while flying over downtown Sacramento. The…

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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