- Date
- May 18, 1984, 06:40 local (12:40 UTC)
- Place
- Wiggins, CO
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N9822Grumman G-164A
- Weather
- Visual (VMC) · Day
- Status
- Completed
- Report
- Approved by Office Director
- FAA report
- 19840518017819A
- Case key
- 16382
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
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
While en route to a field for aerial application, an oil mist appeared on the windshield of the acft. Shortly after that, the eng progressively lost power & the plt made a forced landing in a pasture. During the landing roll, the acft hit a hole in the ground & nosed over. An exam of the eng revealed that the exhaust rocker box on the #1 cylinder had cracked & separated where the oil lines were attached. There were 2 pratt & whitney service bulletins concerning R-1340-AN1 cylinders that were not complied with. SB-1720 recommended an inspection of the cylinder heads during overhaul. SB-1743 called for replacement of all cylinders with improved cylinders having a 5/8 inch reenforcement web on the exhaust rocker box. The old cylinders had 1/2 inch web. The acft had flown 360 hrs since the last major overhaul.
Aircraft
- Registration
- N9822
- Reported as
- Grumman G-164A
- Category
- Airplane
- Serial number
- 1282
- Airframe hours
- 1,900
- Engine
- P&W R-1340-AN1, 600 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Aerial application · Part 137
- Registered owner
- Low Level Dusting Co. Inc.
- Airworthiness certificate
- Special, Restricted (Special)
- Last inspection
- 100 hour · February 15, 1984
- Departed
- GXY · Greeley, CO
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
- 58
- Certificate
- Commercial
- Airplane ratings
- Single-engine land, Multi-engine land
- Medical
- Class 2, Valid Medical--w/ waivers/lim
- Seat
- Center
- Flight hours
- 11,700 total · 3,900 in this make and model · 37 in the last 90 days · 4 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 55 °F
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.
Other investigations on N9822 · 1
Matched to the same aircraft by N-number and date.