Piper PA-46-500TP N504SR

Summary

On 15 March 2005 at about 21:10 local time, a Piper PA-46-500TP registered N504SR, operated by Steven P. Urry, was involved in an accident near Flagstaff, Arizona, United States. 2 people were on board and nobody was injured. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

15 March 2005 at 21:10

Classification

Accident

Location

Flagstaff, Arizona, United States

Nearest airport

Flagstaff Puliam Airport (FLG)

Coordinates

35.1386, -111.6711

Aircraft

Piper PA-46-500TP

Registration

N504SR

Category

Airplane

Engines

1

Operator

Steven P. Urry

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Route

Heber → Flagstaff

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

LAX05LA116

Nobody was injured.

the loss of directional control during landing for undetermined reasons.

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full NTSB narrative

The airplane veered off the left side of the runway during the landing roll and the nose landing gear collapsed upon impact with a snow bank. The pilot reported that the airplane touched down normally on the main landing gear, but when the nose landing gear touched down the airplane veered suddenly and violently to the left. He believed the nose landing gear was not responding to normal control inputs. The tire and skid marks on the runway were consistent with the pilot's statement and showed that the airplane's track diverged in excess of 70 degrees from the runway centerline just after nose wheel touchdown. Examination of the tires disclosed that the nose tire was scrubbed perpendicularly to the tire tread from right to left. No flat spots or other unusual signatures were observed on the main tires or the brakes. Post accident investigation of the nose landing gear system revealed the bolt that attaches the hydraulic actuator to the engine mount was sheared and the nose gear steering arm was fractured. Examination of the steering arm revealed it met the manufacturer's specifications and its failure, along with the bolt, was determined to be overload. Examination of the steering bungee revealed no obvious anomalies. According to the airplane manufacturer, there were 32 prior reports of temporary and unexplained loss of directional control immediately following nose wheel touchdown during landings, primarily when crosswind conditions are present and/or when applying full propeller reverse. Investigation of those events by the manufacturer's engineering department found that a contributing cause of the directional control problems was identified as insufficient nose gear steering authority, which under certain conditions, can allow the nose gear steering system rotation to momentarily exceed the pilot's input. The manufacturer issued a service bulletin, which recommended the incorporation of nose gear installation modifications. The modifications were intended to increase the pilot's steering authority and remedy the directional control problems. According to manufacturer, the accident airplane was manufactured after all of the nose gear modifications were implemented on the production line.

Quoted verbatim from the NTSB record.