- Date
- November 20, 1999, 21:00 local (Nov 21, 1999, 04:00 UTC)
- Place
- Sheridan, WY
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Landing
- Aircraft
- N3928YCessna 210D
- Weather
- Visual (VMC) · Night/bright
- Status
- Completed · report November 30, 2000
- Report
- Approved by Office Director
- Case key
- 47813
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
The partial failure of the engine driven hydraulic pump.
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 pilot said that this was the first flight after the annual inspection. When he put the leading gear handle down for landing, he didn't get a positive gear lock light, so he cycled the leading gear several times in an attempt to get a positive gear down and locked indication. He attempted to hand pump the gear down, but still had no positive down and locked light. He landed the airplane, and during the landing roll the right main landing gear failed. Postaccident examination of the engine driven hydraulic pump pressure revealed that its output was 200 pounds per square inch (psi). The maintenance personnel that worked on the airplane said that normal pump pressure output was 2,725 psi. The hydraulic pump was replaced, and the landing gear cycled normally.
Factual narrative
On November 20, 1999, at 2100 mountain standard time, a Cessna 210D, N3928Y, was substantially damaged during landing at Sheridan County Airport, Sheridan, Wyoming. The private pilot, the sole occupant in the airplane, was not injured. The airplane was being operated by the pilot under Title 14 CFR Part 91. Visual meteorological conditions prevailed for the local flight which originated approximately 35 minutes before the accident. No flight plan had been filed.
The pilot said that this was the first flight after the annual inspection. He was flying from Billings, Montana, to Sheridan, Wyoming, and had put the leading gear handle down for landing. He didn't get a positive gear lock light, so he cycled the landing gear several times in an attempt to get a positive gear down and locked indication. He then attempted to hand pump the gear down, but still had no positive down and locked light. He landed the airplane, and during the landing roll the right main landing gear collapsed. Subsequently, the right horizontal stabilizer and the right wing tip were bent when they struck the ground.
Postaccident examination of the engine driven hydraulic pump pressure revealed that its output was 200 pounds per square inch (psi). The maintenance personnel that worked on the airplane said that normal pump pressure output should be 2,725 psi. The hydraulic pump was replaced, and the landing gear cycled normally.
Aircraft
- Registration
- N3928Y
- Reported as
- Cessna 210D
- Category
- Airplane
- Serial number
- 21058428
- Airframe hours
- 3,725
- Engine
- Continental I0-520, 285 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Registered owner
- John W. Krenek
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · November 20, 1999 · 1 hours before
- Departed
- BIL · Billings, MT
- Destination
- SHR
- Airport
- SHR · Sheridan County Airport, runway 14, 8,300 × 100 ft, asphalt
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
- 52
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Medical
- Class 3, Valid Medical--no waivers/lim.
- Seat
- Left
- Flight hours
- 172 total · 22 in this make and model · 110 as pilot in command · 24 in the last 90 days · 15 in the last 30 days · 1 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Night/bright
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 34 °F, dew point 30 °F
- Altimeter
- 29.00 inHg
- Observed at
- SHR
Other investigations on N3928Y · 1
Matched to the same aircraft by N-number and date.