- Date
- May 18, 1991, 11:15 local (18:15 UTC)
- Place
- Richmond, CA
- Injuries
- 2 uninjured
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N6507HCessna 152
- Weather
- Visual (VMC) · Day
- Status
- Completed · report May 27, 1993
- Report
- Approved by Office Director
- FAA report
- 19910518016489A
- Case key
- 27211
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
Loss of engine power due to carburetor ice. A factor in the accident was the failure of the instructor to properly supervise the conduct of the flight.
Sequence of events
NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.
Analysis
The local area dual instructional flight was enroute to the practice area at an altitude of 1,300 feet when the engine suddenly lost power. The instructor's attempts to remedy the loss of power were unsuccessful and the aircraft collided with a bridge structure and an automobile during an attempted forced landing on a freeway. The aircraft was examined by an FAA airworthiness inspector. In his report of the examination, the inspector noted that no mechanical malfunctions or failures were identified. The oakland, California, aviation weather observation taken at 0945 hours reported a temperature of 55 degrees and a dew point of 41 degrees. Review of a carburetor icing probability chart revealed that the temperature and dew point falls within an area defined as 'serious icing - cruise or climb power'.
Aircraft
- Registration
- N6507H
- Reported as
- Cessna 152
- Category
- Airplane
- Serial number
- 15284174
- Engine
- Lycoming O-235-12C, 110 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Instructional · Part 91
- Operator
- Univ Of Calif Flying Club
- Registered owner
- Univ Of Calif Flying Club
- Last inspection
- Unknown · January 2, 2000
- Departed
- OAK · Oakland, CA
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 22
- Certificate
- Commercial
- Airplane ratings
- Single-engine land, Multi-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, Valid Medical--no waivers/lim.
- Flight hours
- 2,000 total · 1,000 in this make and model · 1,800 as pilot in command · 200 in the last 90 days · 50 in the last 30 days · 3 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Visibility
- 15 statute miles
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.