# NTSB LAX87DUJ10: Cessna 188B, N8275G, Poston, AZ, August 29, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: August 28, 1987, 20:00 local (Aug 29, 1987, 03:00 UTC)
- Place: Poston, AZ
- Coordinates: 33.830612, -114.379013 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=33.8306&lon=-114.3790&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report April 24, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 25314
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX87DUJ10
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/25314/pdf
- Page: https://openairdocs.org/ntsb/LAX87DUJ10

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, takeoff - initial climb
  - propeller system/accessories,blade - fatigue (cause)
  - propeller system/accessories,blade - separation (cause)
  - engine assembly,crankshaft - failure,total (cause)
  - maintenance,overhaul - improper, other maintenance personnel (cause)
- Forced landing, descent - emergency
- Overrun, landing - roll
- Nose over, landing - roll
  - terrain condition - crop (contributing factor)

## Analysis

JUST AFTER LIFTOFF ONE PROPELLER BLADE SEPARATED FROM THE HUB NEAR THE OUTBOARD END OF THE ASSOCIATED FERRULE FITTING WHICH INDUCED A FAILURE OF THE CRANCKSHAFT. THE PILOT MADE A FORCED LANDING, OVERRAN THE RUNWAY END AND NOSED OVER. METALLURGICAL ANALYSIS INDICATED THAT THE FAILURE WAS DUE TO A FATIGUE FRACTURE WITH MULTIPLE ORIGIN POINTS CAUSED BY A SCRATCH. THE ANALYSIS ALSO SUGGESTED THAT ALL BUT THE FIRST THREE FERRULE THREADS HAD BEEN REWORKED IN A POST MANUFACTURE HAND GRINDING PROCESS IN ACCORDANCE WITH A MCCAULEY SERVICE BULLETIN SPECIFYING A HAND GRINDING REWORK TO REMOVE SHARP THREADS IN THE FERRULE, WHICH HAD BEEN SHOWN TO PRODUCE PRIOR FATIGUE FRACTURES. IN THE AREA OF THE FATIGUEFRACTURE, THE FIRST THREE THREADS OF THE FERRULE WERE FOUND WITH SHARP EDGES. MAINTENANCE RECORDS DID NOT SHOW THE TOTALTIME ON THIS PROPELLER SINCE MAJOR OVERHAUL.

## Aircraft

- Registration: [N8275G](https://openairdocs.org/deregistered/N8275G-2018-01-26), registration cancelled 2018-01-26, S/N 18801280T (OpenAirDocs)
- Reported make and model: CESSNA 188B
- Registry model: [Cessna A188B](https://openairdocs.org/model/cessna-a188b) (registry code 2073005) (OpenAirDocs)
- Registry engine: [NONE](https://openairdocs.org/engine/none) (registry code 00000, none) (OpenAirDocs)
- Category: Airplane
- Serial number: 18801280T
- Airframe hours: 2341
- Engines: CONTINENTAL IO-520-D 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Western Arizona Ag Rotors
- Registered owner: Campo Robert H
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: 100 hour, August 27, 1987, 6 hours before
- Destination: S 4
- Airport: Camp Poston, runway 18, 1,800 × 60 ft, dirt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 55; commercial; airplane ratings: single-engine land, multi-engine land; medical: class 2, valid medical--no waivers/lim.; flight hours: 19,500 total, 19,300 as pilot in command, 200 in the last 90 days, 35 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Dawn
- Visibility: 5 statute miles
- Lowest ceiling: none
- Temperature: 90 °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 19870828048899A](https://openairdocs.org/incident/19870828048899A), Aug 28, 1987: Cessna 188B, Poston, AZ, Destroyed. Inflight collision with the terrain on the departure end of runway after failure of the propeller and crankshaft.

## Other investigations on N8275G (2)

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.

- [NTSB MIA78DLA39](https://openairdocs.org/ntsb/MIA78DLA39), Jun 7, 1978: Cessna 188B (N8275G), Newberry, FL, substantial damage
- [NTSB MIA74DLA45](https://openairdocs.org/ntsb/MIA74DLA45), May 28, 1974: Cessna 188 (N8275G), Trenton, FL, substantial damage

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.