# NTSB LAX84LA103: Cessna 172, N426SK, Half Moon Bay, CA, November 25, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: November 25, 1983, 13:00 local (21:00 UTC)
- Place: Half Moon Bay, CA
- Coordinates: 37.439712, -122.409538 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=37.4397&lon=-122.4095&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 24119
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX84LA103
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/24119/pdf
- Page: https://openairdocs.org/ntsb/LAX84LA103

## Sequence of events

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

- On ground/water collision with object, taxi - from landing
  - object - aircraft parked/standing (contributing factor)
  - clearance - misjudged, pilot in command (cause)

## Analysis

THE PLT WAS TAXIING TO PARK WHEN THE RIGHT WING TIP OF HIS ACFT CONTACTED THE LEFT WING TIP OF A CESSNA 172RG, N6221R, THAT WAS PARKED BESIDE THE TAXIWAY. ACCORDING TO THE PLT, THE WING TIP OF THE PARKED ACFT EXTENDED APRX 5 FT OVER THE TAXIWAY.

## Aircraft

- Registration: [N426SK](https://openairdocs.org/aircraft/N426SK), registered now, S/N 17273720, built 1979 (OpenAirDocs)
- Reported make and model: CESSNA 172
- Registry model: [Cessna 172N](https://openairdocs.org/model/cessna-172n) (registry code 2072434) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 73720
- Airframe hours: 1300
- Engines: LYCOMING O-320 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Palo Alto Flying Club
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, June 1, 1983
- Departed: PAO, PALO ALTO, CA
- Airport: Half Moon Bay

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 22; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 358 total, 250 in this make and model, 263 as pilot in command, 6 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 300° at 10 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 61 °F

## 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 19831125069909A](https://openairdocs.org/incident/19831125069909A), Nov 25, 1983: Cessna 172, Half Moon Bay, CA, Substantial damage. Taxiing too fast to stop a wing struck a parked aircraft that was incorrectly parked with its wing over taxiway.

## Other investigations on N426SK (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 SEA01LA169](https://openairdocs.org/ntsb/SEA01LA169), Sep 8, 2001: Cessna 172N (N426SK), Pasco, WA, substantial damage. Probable cause: The DHC-8 maintenance crew's failure to maintain radio contact with the tower during its engine run. Factors included the tower controller not issuing a safety advisory on the DHC-8 engine run to the…

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.