WPR18LA175

NTSB accident investigation · Cessna P210N · Lewiston, ID · May 29, 2018

Accident · No injuriesClass 3 · LimitedFinal report
Date
May 29, 2018, 09:00 local (16:00 UTC)
Place
Lewiston, ID
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N7546KCessna P210N
Defining event
Landing-flare/touchdown: Abnormal runway contact
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 3
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
Case key
97547

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

The failure of a hydraulic line in the landing gear system, which resulted in the pilot's inability to lower the gear and a subsequent gear-up landing.

Findings · 2

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

After climbing to cruise altitude, the pilot noted that the landing gear position indicator lights showed that the landing gear were not retracted, and the pilot was unable to fully extend or retract the gear. He declared an emergency and landed with the landing gear retracted, resulting in substantial damage to the horizontal stabilizer. Examination revealed that the rigid hydraulic line connecting the hydraulic powerpack to the bulkhead had failed at the ferrule. A review of maintenance records revealed that this line had recently been duplicated and replaced due to a failure in the same area. The reason for the failure was not determined based on the available evidence.

Factual narrative

On May 29, 2018 about 0900 Pacific daylight time, a Cessna P210, N7546K, was substantially damaged when it was involved in an accident near Lewiston, Idaho. The private pilot, the sole occupant, was not injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot reported that, following departure, he climbed to his planned enroute altitude of 7,500 ft mean sea level. He noticed that the airspeed was lower than expected and then saw that the landing gear position indicator light showed that the gear was not retracted. The pilot cycled the gear but was unable to fully extend or retract them. He then attempted to manually lower the landing gear with the emergency hand pump but was unsuccessful. He declared an emergency and subsequently landed with the gear retracted, resulting in substantial damage to the horizontal stabilizer spar. Examination revealed that the rigid hydraulic line connecting the powerpack to the bulkhead had failed at the ferrule. A review of the airplane's maintenance records revealed that, on March 13, 2018, at a tachometer time of 384 hours, a maintenance facility completed a check of the landing gear. A subsequent entry, dated May 17, 2018, and about 8.6 flight hours after the previous maintenance, stated, "Landing gear inop for up/dn. Pilot report did pump gear down." The entry indicated that personnel performed troubleshooting on the source of a hydraulic fluid leak, which they determined to be at the hydraulic power pack gear system. The entry stated that the tube fitting line cracked at the flare below the ferrule, and a new line of aluminum tubing the same size and length as the failed tubing was fabricated and installed.

Aircraft

Registration
N7546K
Reported as
Cessna P210N
Category
Airplane
Serial number
P21000407
Built
1979
Airframe hours
6,450
Engine
Continental TSIO-520, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Departed
JSY · Joseph, OR
Destination
LWS · Lewiston, ID
Airport
LWS · Lewiston-Nez Perce County, runway 30, 5,002 × 100 ft, asphalt
Equipment
Auto-pilot

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
65
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, With waivers/limitations
Seat
Left
Restraint
3-point
Flight hours
3,000 total · 1,385 in this make and model · 3,000 as pilot in command · 450 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
64 °F, dew point 46 °F
Altimeter
29.97 inHg
Observed at
KLWS

Docket · 3

The files NTSB released with the investigation on March 11, 2021, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.1 MB in all.