# NTSB LAX92LA071: Cessna 172N, N734GY, Chandler, AZ, December 24, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: December 24, 1991, 15:30 local (22:30 UTC)
- Place: Chandler, AZ
- Coordinates: 33.239974, -111.779808 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=33.2400&lon=-111.7798&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report December 4, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 27523
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX92LA071
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/27523/pdf
- Page: https://openairdocs.org/ntsb/LAX92LA071

## Probable cause

THE FAILURE OF THE PILOT TO MAINTAIN AN ADEQUATE VISUAL LOOKOUT WHILE TAXIING THE AIRCRAFT.

## Sequence of events

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

- On ground/water encounter with terrain/water, taxi - to takeoff
  - terrain condition - ditch
  - visual lookout - not maintained, pilot in command (cause)
  - diverted attention, pilot in command
- Nose over, taxi - to takeoff

## Analysis

THE PILOT SAID HE WAS ADJUSTING HIS INTERCOM SYSTEM CONTROLS WHICH WERE ON THE FLOOR BETWEEN THE FRONT SEATS AS THE AIRCRAFT WAS TAXING DOWN THE TAXIWAY PARALLEL TO THE ACTIVE RUNWAY.  AT THE POINT WHERE THE TAXIWAY TURNED 90 DEGREES AT THE END OF THE RUNWAY, THE AIRCRAFT CONTINUED STRAIGHT AHEAD AND RAN OFF THE PAVEMENT INTO THE DIRT.  ABOUT 20 FEET BEYOND THE END OF THE TAXIWAY PAVEMENT, THE AIRCRAFT ENCOUNTERED A DITCH AND NOSED OVER ONTO ITS BACK.

## Aircraft

- Registration: [N734GY](https://openairdocs.org/aircraft/N734GY), registered now, S/N 17268854, built 1977 (OpenAirDocs)
- Reported make and model: CESSNA 172N
- Registry model: [Cessna 172N](https://openairdocs.org/model/cessna-172n) (registry code 2072434) (OpenAirDocs)
- Registry engine: [Lycoming O-320-H2AD](https://openairdocs.org/engine/lycoming-o-320-h2ad) (registry code 42131, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 17268854
- Engines: LYCOMING O-320-H2AD 160 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Venture Aviation, Inc.
- Registered owner: Richard Glazar
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, January 2, 2000
- Airport: Chandler Municipal

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 53; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 150 total

## Weather

- Conditions: Visual (VMC), Day
- Wind: 60° at 5 knots
- Visibility: 50 statute miles
- Lowest ceiling: none
- 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 19911224057179A](https://openairdocs.org/incident/19911224057179A), Dec 24, 1991: Cessna 172N, Chandler, AZ, Substantial damage. Failed to follow turn in taxiway while taxiing for takeoff. Attention was on floor adjusting intercom. Struck ditch

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.