# NTSB LAX83FVM04: Swearingen SA226-T, N4273X, San Francisco, CA, December 7, 1982

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: December 7, 1982, 11:56 local (19:56 UTC)
- Place: San Francisco, CA
- Coordinates: 37.609317, -122.380065 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=37.6093&lon=-122.3801&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 5 uninjured
- Status: Completed, report December 7, 1983
- Report: Approved by Office Director
- NTSB case key (mKey): 72494
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX83FVM04
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/72494/pdf
- Page: https://openairdocs.org/ntsb/LAX83FVM04

## Sequence of events

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

- Loss of control - on ground/water, landing - roll
  - reason for occurrence undetermined (cause)
  - weather condition - crosswind (contributing factor)
  - directional control - not maintained
  - ground loop/swerve - uncontrolled
- Nose gear collapsed, landing - roll
  - terrain condition - soft (contributing factor)
  - terrain condition - wet (contributing factor)
  - landing gear,nose gear - overload

## Analysis

DURING ARRIVAL, THE WINDS WERE REPORTED FROM 350 TO 360 DEG AT 20 GUSTING 25 KTS, AND WHILE LANDING, THEY WERE FROM 360 DEG AT 21 KTS. THE ACFT'S MAX DEMO X-WIND CAPABILITY WAS 22 KTS. THE PLT REPORTED THAT DURING THE LANDING, THE POWER LEVERS WERE RETARDED TO IDLE, THEN TO REVERSE. WHILE ENTERING REVERSE, THE ACFT SWERVED TO THE LEFT, AWAY FROM THE X-WIND. THE PLT THEN ADVANCED THE THROTTLES OUT OF REVERSE TO LESS THAN FLT IDLE. AT THAT TIME, THE ACFT SWERVED TO THE RIGHT. THE POWER LEVERS WERE AGAIN REVERSED & BRAKES WERE APPLIED. HOWEVER, THE ACFT VEERED OFF THE RIGHT SIDE OF THE RWY. IT CONTINUED INTO MUD, THE NOSE GEAR COLLAPSED & BOTH PROPS WERE DAMAGED. THE PLT DID NOT FEATHER THE ENGS UNTIL AFTER BOTH PROPS HAD STOPPED TURNING. THE RIGHT PROP WAS FOUND IN THE FULL FEATHERED POSITION, THE LEFT PROP HAD NOT FEATHERED. REMOVAL OF THE RIGHT PROP DOME REVEALED NO APPARENT ABNORMALITIES OR INTERNAL DAMAGE. THERE WAS EVIDENCE THAT THE LEFT PROP HAD GONE BEYOND FULL REVERSE ON IMPACT. NO PREIMPACT FAILURE WAS FOUND.

## Aircraft

- Registration: N4273X (not matched to a registry record)
- Reported make and model: SWEARINGEN SA226-T
- Category: Airplane
- Serial number: T-268
- Airframe hours: 1570
- Engines: AIRESEARCH TPE-3313U303G 840 horsepower turbo prop
- Damage: Substantial damage
- Flight: Executive/Corporate, Part 91
- Operator: United Faith Foundation, Inc.
- Registered owner: United Faith Foundation, Inc.
- Departed: FAT, FRESNO, CA
- Destination: BIRMINGHAM, AL
- Flight plan: IFR
- Airport: SFO, San Francisco Intl., runway 28R, 11,870 × 200 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 43; commercial, airline transport, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; flight hours: 7,053 total, 265 in this make and model, 6,566 as pilot in command, 75 in the last 90 days, 38 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 360° at 21 knots
- Visibility: 40 statute miles
- Temperature: 133 °F
- Altimeter: 30.00 inHg
- Observed at: SFO

## 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 19821207062739A](https://openairdocs.org/incident/19821207062739A), Dec 7, 1982: Swrngn SA226T, San Francisco, CA, Substantial damage. Lost directional control during propeller reversal to slow the aircraft. Ran off runway. Nose gear collapsed in mud

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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