# Accident 20211008017449A: Beech B36TC, Los Banos, CA, October 8, 2021

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: October 8, 2021, 19:00 local time
- Place: Los Banos, CA
- Damage: Substantial damage
- Phase of flight: Cruise/Level Flight
- Operating rules: General operating rules (Part 91)
- Location: 37.0423° N, 120.8618° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=37.0423&lon=-120.8618&mi=10
- Aircraft: N7220B, registered now (https://openairdocs.org/aircraft/N7220B) (OpenAirDocs)
- Registry model: Beech B36TC (registry code 1151609, https://openairdocs.org/model/beech-b36tc) (OpenAirDocs)
- Registry engine: NONE (registry code 00000, https://openairdocs.org/engine/none) (OpenAirDocs)
- Reported make and model: BEECH B36TC
- Reported engine: CONT MOTOR IO-550-B
- People aboard: 1
- Fatal injuries: 0
- Other injuries: 0
- NTSB investigation: [NTSB WPR22LA005](https://openairdocs.org/ntsb/WPR22LA005) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20211008017449A

## Narrative

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

ON OCT 8, 2021, N7220B DEPARTED PASO ROBLES AIRPORT.  WHILE ENROUTE, AT CRUISE ALTITUDE, THE ENGINE BEGAN TO LOOSE POWER.  THE PIC NOTICED THE OIL PRESSURE HAD DROPPED TO ZERO AND THE PIC ADVISED ATC OF THE EMERGENCY AND DIVERTED TO LOS BANOS.  WHILE DESCENDING THE ENGINE STARTED TO SELF DESTRUCT AND FILLED THE COCKPIT FULL OF SMOKE.  THE PIC WAS STILL SHORT OF THE AIRPORT AND FEARING AN INFLIGHT FIRE, DECIDED TO MAKE AN EMERGENCY LANDING OFF FIELD ON A ROAD.  THE AIRCRAFT LANDED HARD AND SUBSEQUENTLY THE NOSE WHEEL AND LEFT MAIN RIPPED OFF THE AIRCRAFT AND SPUN THE AIRCRAFT OFF TO THE SIDE OF THE ROAD.  NO PASSENGERS ON BOARD, NO INJURIES.  SUBSTANTIAL DAMAGE TO AIRCRAFT POST LANDING.

INITIAL POST CRASH INSPECTION FROM THE PILOT OBSERVED A HOLE IN THE SIDE OF THE ENGINE CASE.  AIRCRAFT HAS BEEN RECOVERED AND MOVED TO A SECURE LOCATION.  NTSB HAS INDICATED THEY WANT TO CONDUCT AN ENGINE TEAR DOWN BUT AT THIS TIME IT IS NOT SCHEDULED AND NO CAUSE OF THE ENGINE FAILURE HAS BEEN IDENTIFIED.  WILL AMMEND THIS REPORT IF ENGINE TEAR DOWN FINDINGS POINT TO ANY OF THE FAA RESPONSIBILITIES.

IN REVIEW OF THE AIRCRAFT ENGINE MX LOGS, THE ENGINE HAS HAD 25 HOURS SINCE MAJOR OVERHAUL.  ALL MX ENTRIES LOOK CORRECT AND ENGINE BREAK IN PROCEDURES APPEAR TO HAVE BEEN FOLLOWED.

## The NTSB's investigation of this event (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 WPR22LA005](https://openairdocs.org/ntsb/WPR22LA005), Oct 9, 2021: Beech B36TC (N7220B), Los Banos, CA, substantial damage. Probable cause: The total loss of engine power due to the improper installation of the No. 4 connecting rod bolt nut during a recent overhaul.

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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