# NTSB LAX93LA161: Cessna 150, N50287, San Diego, CA, April 3, 1993

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: April 3, 1993, 13:50 local (21:50 UTC)
- Place: San Diego, CA
- Coordinates: 32.80083, -117.129562 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=32.8008&lon=-117.1296&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor
- Status: Completed, report November 15, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 27951
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX93LA161
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/27951/pdf
- Page: https://openairdocs.org/ntsb/LAX93LA161

## Probable cause

THE FAILURE OF THE WING FLAP CONTROL DUE TO THE IMPROPER TYPE OF FUSE INSTALLED BY UNIDENTIFIED PERSONS.  FACTORS RELATING TO THIS ACCIDENT WERE THE FLAP MOTOR PARTIAL FAILURE DUE TO CORROSION AND THE TOTAL FAILURE OF THE FUSE DUE TO THE WRONG TYPE AMPERAGE.

## Sequence of events

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

- Airframe/component/system failure/malfunction, takeoff - roll/run
  - flt control syst,wing flap control - inoperative (cause)
  - electrical system,electric motor - failure,partial (contributing factor)
  - electrical system,electric motor - corroded (contributing factor)
  - electrical system,fuse - failure,total (contributing factor)
  - electrical system,fuse - improper (contributing factor)
  - maintenance,installation - improper, unknown (cause)
- Loss of control - in flight, maneuvering
  - object - wire,transmission (contributing factor)
  - airspeed - not possible, pilot in command (contributing factor)
  - stall/mush - inadvertent, pilot in command (contributing factor)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

THE PILOT WAS PRACTICING TOUCH AND GO TAKEOFFS AND LANDINGS.  THE FLAPS WERE FULLY EXTENDED DURING THE LANDING PHASE OF THE MANEUVER.  DURING THE SECOND LANDING ROLL THE PILOT RAISED THE FLAP HANDLE AND BEGAN THE TAKEOFF ROLL. WHEN THE AIRPLANE LIFTED OFF THE PILOT OBSERVED THAT THE FLAPS REMAINED FULLY EXTENDED AND WOULD NOT RAISE.  THE PILOT WAS ABLE TO TURN THE AIRPLANE, BUT COULD NOT GAIN ADDITIONAL ALTITUDE WITHOUT THE STALL WARNING HORN ACTIVATING.  THE PILOT TURNED THE AIRPLANE TOWARD THE AIRPORT BUT OBSERVED A POWERLINE. THE PILOT WAS UNABLE TO CLIMB OVER THE POWERLINE AND BANKED THE AIRPLANE.  THE AIRPLANE STALLED DURING THE BANKING TURN.  THE POST ACCIDENT INVESTIGATION REVEALED THAT THE FUSE HAD BLOWN AND WAS THE WRONG TYPE OF FUSE.  THE FLAP MOTOR TERMINALS WERE CORRODED AND THE FLAP MOTOR OPERATED INTERMITTENTLY UNDER ALL LOAD CONDITIONS.

## Aircraft

- Registration: [N50287](https://openairdocs.org/deregistered/N50287-1998-01-23), registration cancelled 1998-01-23, S/N 15069198 (OpenAirDocs)
- Reported make and model: CESSNA 150
- Registry model: [Cessna 150H](https://openairdocs.org/model/cessna-150h) (registry code 2071818) (OpenAirDocs)
- Category: Airplane
- Serial number: 15069198
- Airframe hours: 3600
- Engines: CONTINENTAL O-200-A 100 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Operator: Shively, Harold Et Al
- Registered owner: Shively, Harold Et Al
- Airworthiness certificate: Standard, Utility; Standard, Normal
- Last inspection: Annual, May 11, 1992, 100 hours before
- Airport: Montgomery Field, runway 28R, 3,400 × 50 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 62; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 150 total, 150 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 240° at 8 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 79 °F, dew point 57 °F
- Altimeter: 29.00 inHg

## 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 19930403007839A](https://openairdocs.org/incident/19930403007839A), Apr 3, 1993: Cessna 150H, San Diego, CA, Destroyed. Unable to raise flaps on climbout. Stalled avoiding powerline. Flap motor lacked grease. Improper flap fuse.

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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