# NTSB SEA85LA131: Piper PA-18-150, N6995B, Brentwood, CA, June 6, 1985

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 6, 1985, 07:45 local (14:45 UTC)
- Place: Brentwood, CA
- Coordinates: 37.849681, -121.620674 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=37.8497&lon=-121.6207&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 40171
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA85LA131
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40171/pdf
- Page: https://openairdocs.org/ntsb/SEA85LA131

## 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
  - minimum descent altitude - not maintained, pilot in command (cause)
  - lack of total experience, pilot in command (contributing factor)
- On ground/water encounter with terrain/water, landing - roll

## Analysis

ON THE STUDENT PLTS SEVENTH ATTEMPTED LANDING, DIRECTIONAL CONTROL WAS LOST AND A GROUNDLOOP OCCURRED. THE STUDENT PLT HAD LESS THAN TWO HOURS OF TOTAL PILOT IN COMMAND TIME.

## Aircraft

- Registration: [N6995B](https://openairdocs.org/aircraft/N6995B), registered now, S/N 18-5123 (OpenAirDocs)
- Reported make and model: PIPER PA-18-150
- Registry model: [Piper PA-18A 150](https://openairdocs.org/model/piper-pa-18a-150) (registry code 7101837) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 185123
- Engines: LYCOMING O-320-A2A 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Jerry Graham
- Airworthiness certificate: Standard, Utility; Standard, Normal
- Last inspection: Annual, December 24, 1984
- Departed: 012, ANTIOCH, CA
- Destination: NONE, BRENTWOOD, CA
- Airport: Discovery Bay, runway 18, 3,000 ×  ft, gravel

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 29; student; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 20 total, 20 in this make and model, 2 as pilot in command, 20 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 81 °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 19850606066719A](https://openairdocs.org/incident/19850606066719A), Jun 6, 1985: Piper PA18A150, Brentwood, CA, Substantial damage. Lost directional control on landing number 7. Aircraft veered off runway and struck a raised dirt area. Nosed down.

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.