# NTSB LAX88LA259: Cessna R172K, N736HQ, Corona, CA, July 16, 1988

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: July 16, 1988, 13:40 local (20:40 UTC)
- Place: Corona, CA
- Location: 33.8753° N, 117.5664° W: Placed by OpenAirDocs: center of Corona, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=33.8753&lon=-117.5664&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor
- Status: Completed, report December 3, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 26058
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX88LA259
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/26058/pdf
- Page: https://openairdocs.org/ntsb/LAX88LA259

## 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, takeoff - initial climb
  - fluid,fuel - starvation (cause)
  - mixture control,linkage - movement restricted (cause)
  - maintenance,inspection - inadequate, company maintenance personnel (contributing factor)
- In flight collision with object, takeoff - initial climb
  - object - tree(s)

## Analysis

DURING TAKEOFF THE ENGINE FAILED TO DEVELOP FULL POWER & THE ACFT COLLIDED WITH TREES LOCATED APPROX 500 FT BEYOND THE RUNWAY. EXAM OF THE ENGINE REVEALED THE MIXTURE CONTROL ARM AT ITS FUEL PUMP HOUSING ATTACHMENT POINT HAD RESTRICTED MOVEMENT & WAS IMPROPERLY ADJUSTED. WHEN THE COCKPIT MIXTURE CONTROL WAS IN THE FULL RICH POSITION THE MIXTURE WAS FOUND SET TO APPROX A MID-RANGE POSITION. ANY AFT MOVEMENT OF THE MIXTURE CONTROL FROM ITS FULL RICH POSITION INITIATED AN ENGINE SHUTDOWN.

## Aircraft

- Registration: [N736HQ](https://openairdocs.org/deregistered/N736HQ-2013-05-07), registration cancelled 2013-05-07, S/N R1722543, built 1977 (OpenAirDocs)
- Reported make and model: CESSNA R172K
- Registry model: [Cessna R172K](https://openairdocs.org/model/cessna-r172k) (registry code 2072431) (OpenAirDocs)
- Registry engine: [Continental IO-360 series](https://openairdocs.org/engine/continental-io-360-series) (registry code 17025, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: R1722543
- Airframe hours: 3980
- Engines: CONTINENTAL IO-360-K 195 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Z-Air
- Registered owner: Mark L Fagerlin
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, April 18, 1988, 67 hours before
- Departed: L66, CORONA, CA
- Destination: L22, YUCCA VALLEY, CA
- Airport: L66, Corona Muni, runway 25, 3,200 × 60 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 48; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 200 total, 10 in this make and model, 150 as pilot in command, 1 in the last 90 days, 1 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 270° at 10 knots
- Visibility: 7 statute miles
- Lowest ceiling: none
- Temperature: 95 °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 19880716026969A](https://openairdocs.org/incident/19880716026969A), Jul 16, 1988: Cessna R172K, Corona, CA, Substantial damage. Mixture arm jammed. Took off with leaned mixture and engine quit. Crashed into trees. Control indicated full rich.

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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