# NTSB LAX90DVD01: Convair L-13A, N13NH, Hayward, CA, August 9, 1990

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Final report
- Date: August 9, 1990, 10:50 local (17:50 UTC)
- Place: Hayward, CA
- Coordinates: 37.670238, -122.079048 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=37.6702&lon=-122.0790&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed, report December 30, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 26567
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX90DVD01
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/26567/pdf
- Page: https://openairdocs.org/ntsb/LAX90DVD01

## Probable cause

ABSENCE OF A OIL SYSTEM FITTING CAP.

## Sequence of events

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

- Loss of engine power(partial) - mech failure/malf, cruise - normal
  - lubricating system,oil filler cap - missing (cause)
- In flight collision with object, descent - emergency
  - object - wire,transmission (contributing factor)
  - precautionary landing - attempted, pilot in command (contributing factor)
  - light condition - daylight

## Analysis

PILOT OF THE RESTORED MILITARY OBSERVATION AIRCRAFT EXPEREINCED A LOSS OF ENGINE POWER AND MADE A PRECAUTIONARY LANDING AT A LOCAL HIGH SCHOOL. THE AIRCRAFT COLLIDED WITH A TELEPHONE WIRE AND WAS SUBSEQUENTLY DESTROYED. THE PILOT STATED HE HAD A LOSS OF ENGINE OIL WITH BURNING ENGINE OIL THAT FILLED THE CABIN WITH SMOKE. A STEEL 'AN' FITTING CAP USED TO SHUT OFF THE FLOW OF ENGINE OIL FROM THE ENGINE OIL PAN WAS MISSING. A MAJOR ENGINE OVERHAUL WAS ACCOMPLISHED ABOUT 25 HOURS PRIOR TO THE ACCIDENT.

## Aircraft

- Registration: [N13NH](https://openairdocs.org/deregistered/N13NH-1991-11-05), registration cancelled 1991-11-05, S/N 47276 (OpenAirDocs)
- Reported make and model: CONVAIR L-13A
- Registry model: [Consolidated Vultee/Hops L-13A](https://openairdocs.org/model/consolidated-vultee-hops-l-13a) (registry code 2420704) (OpenAirDocs)
- Category: Airplane
- Serial number: 47-276
- Engines: FRANKLIN O-425-9 275 horsepower reciprocating
- Damage: Destroyed
- Flight: Positioning, Part 91
- Operator: Noel T. Hops
- Registered owner: Monica A. Hops
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, February 9, 1990, 10 hours before
- Departed: LVK, LIVERMORE, CA
- Destination: OAK, OAKLAND, CA
- Airport: HWD, Hayward

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 58; airline transport, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 8,025 total, 25 in this make and model, 7,692 as pilot in command

## Weather

- Conditions: Visual (VMC), Day
- Wind: 300° at 6 knots
- Visibility: 20 statute miles
- Lowest ceiling: 10,000 ft broken
- Altimeter: 29.00 inHg
- Observed at: HWD, 2 nm away

## 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 19900809031779A](https://openairdocs.org/incident/19900809031779A), Aug 9, 1990: Cvac L13A, Hayward, CA, Destroyed. Lost oil pressure. Smoke in cabin. Elected to land in school yard. Crash landed. Engine oil drain cap missing.

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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